GraphGDIPlus UDF - Create GDI+ line graphs

andybiochem · October 22, 2009

Last Updated: 20/02/2010

Hi!

A while back I created a Graph UDF to enable drawing of graphs in a GUI-control-style way.

I've converted that UDF to use GDI+ to take advantage of double-buffering.

Functions:

_GraphGDIPlus_Create - create graph area

_GraphGDIPlus_Delete - delete graph & shutdown GDI+

_GraphGDIPlus_Clear - clear current drawings

_GraphGDIPlus_Set_RangeX - set x axis range

_GraphGDIPlus_Set_RangeY - set y axis range

_GraphGDIPlus_Set_PenColor - set color of line

_GraphGDIPlus_Set_PenSize - set line width

_GraphGDIPlus_Set_PenDash - set line dash style

_GraphGDIPlus_Set_GridX - add grid (x ticks)

_GraphGDIPlus_Set_GridY - add grid (y ticks)

_GraphGDIPlus_Plot_Start - define starting position

_GraphGDIPlus_Plot_Line - plot line

_GraphGDIPlus_Plot_Point - plot a small square

_GraphGDIPlus_Plot_Dot - plot a single pixel

_GraphGDIPlus_Refresh - refresh graph area (draw)

NOTES / UPDATES:

- be aware that "WM_ACTIVATE" is registered in_GraphGDIPlus_Create (this allows redrawing of the GDI+ when mini/maximizing the GUI)

- due to a hideous over-sight on my part, I've had to update the way that "WM_ACTIVATE" is registered by using a global var in the UDF... so DON'T use "$aGraphGDIPlusaGraphArrayINTERNAL" in your script pls!! (couldn't think of any other way to do this)

~~- be aware that WinSetTrans($hWnd,"",255) is called in _GraphGDIPlus_Create (this prevents GDI+ glitches when moving GUI)~~

- _GraphGDIPlus_Delete must be called upon GUI exit (it shuts down GDI+, and disposes of pens etc)

- Using _GraphGDIPlus_Clear will remove grid-lines too. You will need to redraw these using _GraphGDIPlus_Set_Grid... after clearing

- updated to allow setting color of the x=0 and y=0 lines when visible (when using -ve and +ve axes)

- updated to allow user to decide whether to shut down GDI+ completely when deleting the graph (you may have your own graphics etc)

- updated to declare all vars as Local in functions. Sorry if you had problems with this, no excuses, entirely my fault.

- updated to clean up pen use

- be aware that "WM_MOVE" is registered in_GraphGDIPlus_Create (this allows redrawing of the GDI+ when moving the GUI)

The updates should NOT be script breaking, unless you are manually using Pen vars/handles from the returned graph array.

TO DO

- Look at adding a "save image as..." option (suggested by UEZ - thanks!)

- Error checking / returns

???? any suggestions ????

Example Use

This graph draws Gamma Function in real-time...

#include "GraphGDIPlus.au3"

Opt("GUIOnEventMode", 1)

$GUI = GUICreate("",600,600)
GUISetOnEvent(-3,"_Exit")
GUISetState()

;----- Create Graph area -----
$Graph = _GraphGDIPlus_Create($GUI,40,30,530,520,0xFF000000,0xFF88B3DD)

;----- Set X axis range from -5 to 5 -----
_GraphGDIPlus_Set_RangeX($Graph,-5,5,10,1,1)
_GraphGDIPlus_Set_RangeY($Graph,-5,5,10,1,1)

;----- Set Y axis range from -5 to 5 -----
_GraphGDIPlus_Set_GridX($Graph,1,0xFF6993BE)
_GraphGDIPlus_Set_GridY($Graph,1,0xFF6993BE)

;----- Draw the graph -----
_Draw_Graph()

While 1
    Sleep(100)
WEnd



Func _Draw_Graph()
    ;----- Set line color and size -----
    _GraphGDIPlus_Set_PenColor($Graph,0xFF325D87)
    _GraphGDIPlus_Set_PenSize($Graph,2)

    ;----- draw lines -----
    $First = True
    For $i = -5 to 5 Step 0.005
        $y = _GammaFunction($i)
        If $First = True Then _GraphGDIPlus_Plot_Start($Graph,$i,$y)
        $First = False
        _GraphGDIPlus_Plot_Line($Graph,$i,$y)
        _GraphGDIPlus_Refresh($Graph)
    Next
EndFunc



Func _GammaFunction($iZ)
    $nProduct = ((2^$iZ) / (1 + $iZ))
    For $n = 2 to 1000
        $nProduct *= ((1 + (1/$n))^$iZ) / (1 + ($iZ / $n))
    Next
    Return (1/$iZ) * $nProduct
EndFunc



Func _Exit()
    ;----- close down GDI+ and clear graphic -----
    _GraphGDIPlus_Delete($GUI,$Graph)
    Exit
EndFunc

UDF:

GraphGDIPlus.au3 Updated 20/02/2010

;#AutoIt3Wrapper_Au3Check_Parameters=-d -w 1 -w 2 -w 3 -w 4 -w 5 -w 6

; #INDEX# ===============================================================================
; Title .........: GraphGDIPlus
; AutoIt Version: 3.3.0.0+
; Language:       English
; Description ...: A Graph control to draw line graphs, using GDI+, also double-buffered.
; Notes .........:
; =======================================================================================



; #VARIABLES/INCLUDES# ==================================================================
#include-once
#include <GDIplus.au3>

Global $aGraphGDIPlusaGraphArrayINTERNAL[1]
; =======================================================================================



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Create
; Description ...: Creates graph area, and prepares array of specified data
; Syntax.........: _GraphGDIPlus_Create($hWnd,$iLeft,$iTop,$iWidth,$iHeight,$hColorBorder = 0xFF000000,$hColorFill = 0xFFFFFFFF)
; Parameters ....:  $hWnd - Handle to GUI
;                   $iLeft - left most position in GUI
;                   $iTop - top most position in GUI
;                   $iWidth - width of graph in pixels
;                   $iHeight - height of graph in pixels
;                   $hColorBorder - Color of graph border (ARGB)
;                   $hColorFill - Color of background (ARGB)
; Return values .: Returns array containing variables for subsequent functions...
;                    Returned Graph array is:
;                    [1] graphic control handle
;                    [2] left
;                    [3] top
;                    [4] width
;                    [5] height
;                    [6] x low
;                    [7] x high
;                    [8] y low
;                    [9] y high
;                    [10] x ticks handles
;                    [11] x labels handles
;                    [12] y ticks handles
;                    [13] y labels handles
;                    [14] Border Color
;                    [15] Fill Color
;                    [16] Bitmap Handle
;                    [17] Backbuffer Handle
;                    [18] Last used x pos
;                    [19] Last used y pos
;                    [20] Pen (main) Handle
;                    [21] Brush (fill) Handle
;                    [22] Pen (border) Handle
;                    [23] Pen (grid) Handle
; =======================================================================================
Func _GraphGDIPlus_Create($hWnd, $iLeft, $iTop, $iWidth, $iHeight, $hColorBorder = 0xFF000000, $hColorFill = 0xFFFFFFFF, $iSmooth = 2)
    Local $graphics, $bitmap, $backbuffer, $brush, $bpen, $gpen, $pen
    Local $ahTicksLabelsX[1]
    Local $ahTicksLabelsY[1]
    Local $ahTicksX[1]
    Local $ahTicksY[1]
    Local $aGraphArray[1]

    ;----- Set GUI transparency to SOLID (prevents GDI+ glitches) -----
    ;WinSetTrans($hWnd, "", 255) - causes problems when more than 2 graphs used
    ;----- GDI+ Initiate -----
    _GDIPlus_Startup()
    $graphics = _GDIPlus_GraphicsCreateFromHWND($hWnd) ;graphics area
    $bitmap = _GDIPlus_BitmapCreateFromGraphics($iWidth + 1, $iHeight + 1, $graphics);buffer bitmap
    $backbuffer = _GDIPlus_ImageGetGraphicsContext($bitmap) ;buffer area
    _GDIPlus_GraphicsSetSmoothingMode($backbuffer, $iSmooth)

    ;----- Set background Color -----
    $brush = _GDIPlus_BrushCreateSolid($hColorFill)
    _GDIPlus_GraphicsFillRect($backbuffer, 0, 0, $iWidth, $iHeight, $brush)
    ;----- Set border Pen + color -----
    $bpen = _GDIPlus_PenCreate($hColorBorder)
    _GDIPlus_PenSetEndCap($bpen, $GDIP_LINECAPROUND)
    ;----- Set Grid Pen + color -----
    $gpen = _GDIPlus_PenCreate(0xFFf0f0f0)
    _GDIPlus_PenSetEndCap($gpen, $GDIP_LINECAPROUND)
    ;----- set Drawing Pen + Color -----
    $pen = _GDIPlus_PenCreate() ;drawing pen initially black, user to set
    _GDIPlus_PenSetEndCap($pen, $GDIP_LINECAPROUND)
    _GDIPlus_GraphicsDrawRect($backbuffer, 0, 0, $iWidth, $iHeight, $pen)
    ;----- draw -----
    _GDIPlus_GraphicsDrawImageRect($graphics, $bitmap, $iLeft, $iTop, $iWidth + 1, $iHeight + 1)
    ;----- register redraw -----
    GUIRegisterMsg(0x0006, "_GraphGDIPlus_ReDraw") ;0x0006 = win activate
    GUIRegisterMsg(0x0003, "_GraphGDIPlus_ReDraw") ;0x0003 = win move
    ;----- prep + load array -----
    Dim $aGraphArray[24] = ["", $graphics, $iLeft, $iTop, $iWidth, $iHeight, 0, 1, 0, 1, _
            $ahTicksX, $ahTicksLabelsX, $ahTicksY, $ahTicksLabelsY, $hColorBorder, $hColorFill, _
            $bitmap, $backbuffer, 0, 0, $pen, $brush, $bpen, $gpen]
    ;----- prep re-draw array for all graphs created -----
    ReDim $aGraphGDIPlusaGraphArrayINTERNAL[UBound($aGraphGDIPlusaGraphArrayINTERNAL) + 1]
    $aGraphGDIPlusaGraphArrayINTERNAL[UBound($aGraphGDIPlusaGraphArrayINTERNAL) - 1] = $aGraphArray

    Return $aGraphArray
EndFunc   ;==>_GraphGDIPlus_Create
Func _GraphGDIPlus_ReDraw($hWnd)
    ;----- Allows redraw of the GDI+ Image upon window min/maximize -----
    Local $i
    _WinAPI_RedrawWindow($hWnd, 0, 0, 0x0100)
    For $i = 1 To UBound($aGraphGDIPlusaGraphArrayINTERNAL) - 1
        If $aGraphGDIPlusaGraphArrayINTERNAL[$i] = 0 Then ContinueLoop
        _GraphGDIPlus_Refresh($aGraphGDIPlusaGraphArrayINTERNAL[$i])
    Next
EndFunc   ;==>_GraphGDIPlus_ReDraw



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Delete
; Description ...: Deletes previously created graph and related ticks/labels
; Syntax.........: _GraphGDIPlus_Delete($hWnd,ByRef $aGraphArray)
; Parameters ....:  $hWnd - GUI handle
;                   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                   $iKeepGDIPlus - if not zero, function will not _GDIPlus_Shutdown()
; =======================================================================================
Func _GraphGDIPlus_Delete($hWnd, ByRef $aGraphArray, $iKeepGDIPlus = 0)
    If IsArray($aGraphArray) = 0 Then Return
    Local $ahTicksX, $ahTicksLabelsX, $ahTicksY, $ahTicksLabelsY, $i, $aTemp
    ;----- delete x ticks/labels -----
    $ahTicksX = $aGraphArray[10]
    $ahTicksLabelsX = $aGraphArray[11]
    For $i = 1 To (UBound($ahTicksX) - 1)
        GUICtrlDelete($ahTicksX[$i])
    Next
    For $i = 1 To (UBound($ahTicksLabelsX) - 1)
        GUICtrlDelete($ahTicksLabelsX[$i])
    Next
    ;----- delete y ticks/labels -----
    $ahTicksY = $aGraphArray[12]
    $ahTicksLabelsY = $aGraphArray[13]
    For $i = 1 To (UBound($ahTicksY) - 1)
        GUICtrlDelete($ahTicksY[$i])
    Next
    For $i = 1 To (UBound($ahTicksLabelsY) - 1)
        GUICtrlDelete($ahTicksLabelsY[$i])
    Next
    ;----- delete graphic control -----
    _GDIPlus_GraphicsDispose($aGraphArray[17])
    _GDIPlus_BitmapDispose($aGraphArray[16])
    _GDIPlus_GraphicsDispose($aGraphArray[1])
    _GDIPlus_BrushDispose($aGraphArray[21])
    _GDIPlus_PenDispose($aGraphArray[20])
    _GDIPlus_PenDispose($aGraphArray[22])
    _GDIPlus_PenDispose($aGraphArray[23])
    If $iKeepGDIPlus = 0 Then _GDIPlus_Shutdown()
    _WinAPI_InvalidateRect($hWnd)
    ;----- remove form global redraw array -----
    For $i = 1 To UBound($aGraphGDIPlusaGraphArrayINTERNAL) - 1
        $aTemp = $aGraphGDIPlusaGraphArrayINTERNAL[$i]
        If IsArray($aTemp) = 0 Then ContinueLoop
        If $aTemp[1] = $aGraphArray[1] Then $aGraphGDIPlusaGraphArrayINTERNAL[$i] = 0
    Next
    ;----- close array -----
    $aGraphArray = 0
EndFunc   ;==>_GraphGDIPlus_Delete



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Clear
; Description ...: Clears graph content
; Syntax.........: _GraphGDIPlus_Clear(ByRef $aGraphArray)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; =======================================================================================
Func _GraphGDIPlus_Clear(ByRef $aGraphArray)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- Set background Color -----
    _GDIPlus_GraphicsFillRect($aGraphArray[17], 0, 0, $aGraphArray[4], $aGraphArray[5], $aGraphArray[21])
    ;----- set border + Color -----
    _GraphGDIPlus_RedrawRect($aGraphArray)
EndFunc   ;==>_GraphGDIPlus_Clear



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Refresh
; Description ...: refreshes the graphic
; Syntax.........: _GraphGDIPlus_Refresh(ByRef $aGraphArray)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
; ========================================================================================
Func _GraphGDIPlus_Refresh(ByRef $aGraphArray)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- draw -----
    _GDIPlus_GraphicsDrawImageRect($aGraphArray[1], $aGraphArray[16], $aGraphArray[2], _
            $aGraphArray[3], $aGraphArray[4] + 1, $aGraphArray[5] + 1)
EndFunc   ;==>_GraphGDIPlus_Refresh



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Set_RangeX
; Description ...: Allows user to set the range of the X axis and set ticks and rounding levels
; Syntax.........: _GraphGDIPlus_Set_RangeX(ByRef $aGraphArray,$iLow,$iHigh,$iXTicks = 1,$bLabels = 1,$iRound = 0)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iLow - the lowest value for the X axis (can be negative)
;                    $iHigh - the highest value for the X axis
;                    $iXTicks - [optional] number of ticks to show below axis, if = 0 then no ticks created
;                    $bLabels - [optional] 1=show labels, any other number=do not show labels
;                    $iRound - [optional] rounding level of label values
; =======================================================================================
Func _GraphGDIPlus_Set_RangeX(ByRef $aGraphArray, $iLow, $iHigh, $iXTicks = 1, $bLabels = 1, $iRound = 0)
    If IsArray($aGraphArray) = 0 Then Return
    Local $ahTicksX, $ahTicksLabelsX, $i
    ;----- load user vars to array -----
    $aGraphArray[6] = $iLow
    $aGraphArray[7] = $iHigh
    ;----- prepare nested array -----
    $ahTicksX = $aGraphArray[10]
    $ahTicksLabelsX = $aGraphArray[11]
    ;----- delete any existing ticks -----
    For $i = 1 To (UBound($ahTicksX) - 1)
        GUICtrlDelete($ahTicksX[$i])
    Next
    Dim $ahTicksX[1]
    ;----- create new ticks -----
    For $i = 1 To $iXTicks + 1
        ReDim $ahTicksX[$i + 1]
        $ahTicksX[$i] = GUICtrlCreateLabel("", (($i - 1) * ($aGraphArray[4] / $iXTicks)) + $aGraphArray[2], _
                $aGraphArray[3] + $aGraphArray[5], 1, 5)
        GUICtrlSetBkColor(-1, 0x000000)
        GUICtrlSetState(-1, 128)
    Next
    ;----- delete any existing labels -----
    For $i = 1 To (UBound($ahTicksLabelsX) - 1)
        GUICtrlDelete($ahTicksLabelsX[$i])
    Next
    Dim $ahTicksLabelsX[1]
    ;----- create new labels -----
    For $i = 1 To $iXTicks + 1
        ReDim $ahTicksLabelsX[$i + 1]
        $ahTicksLabelsX[$i] = GUICtrlCreateLabel("", _
                ($aGraphArray[2] + (($aGraphArray[4] / $iXTicks) * ($i - 1))) - (($aGraphArray[4] / $iXTicks) / 2), _
                $aGraphArray[3] + $aGraphArray[5] + 10, $aGraphArray[4] / $iXTicks, 13, 1)
        GUICtrlSetBkColor(-1, -2)
    Next
    ;----- if labels are required, then fill -----
    If $bLabels = 1 Then
        For $i = 1 To (UBound($ahTicksLabelsX) - 1)
            GUICtrlSetData($ahTicksLabelsX[$i], _
                    StringFormat("%." & $iRound & "f", _GraphGDIPlus_Reference_Pixel("p", (($i - 1) * ($aGraphArray[4] / $iXTicks)), _
                    $aGraphArray[6], $aGraphArray[7], $aGraphArray[4])))
        Next
    EndIf
    ;----- load created arrays back into array -----
    $aGraphArray[10] = $ahTicksX
    $aGraphArray[11] = $ahTicksLabelsX
EndFunc   ;==>_GraphGDIPlus_Set_RangeX



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Set_RangeY
; Description ...: Allows user to set the range of the Y axis and set ticks and rounding levels
; Syntax.........: _GraphGDIPlus_SetRange_Y(ByRef $aGraphArray,$iLow,$iHigh,$iYTicks = 1,$bLabels = 1,$iRound = 0)
; Parameters ....:    $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iLow - the lowest value for the Y axis (can be negative)
;                    $iHigh - the highest value for the Y axis
;                    $iYTicks - [optional] number of ticks to show next to axis, if = 0 then no ticks created
;                    $bLabels - [optional] 1=show labels, any other number=do not show labels
;                    $iRound - [optional] rounding level of label values
; =======================================================================================
Func _GraphGDIPlus_Set_RangeY(ByRef $aGraphArray, $iLow, $iHigh, $iYTicks = 1, $bLabels = 1, $iRound = 0)
    If IsArray($aGraphArray) = 0 Then Return
    Local $ahTicksY, $ahTicksLabelsY, $i
    ;----- load user vars to array -----
    $aGraphArray[8] = $iLow
    $aGraphArray[9] = $iHigh
    ;----- prepare nested array -----
    $ahTicksY = $aGraphArray[12]
    $ahTicksLabelsY = $aGraphArray[13]
    ;----- delete any existing ticks -----
    For $i = 1 To (UBound($ahTicksY) - 1)
        GUICtrlDelete($ahTicksY[$i])
    Next
    Dim $ahTicksY[1]
    ;----- create new ticks -----
    For $i = 1 To $iYTicks + 1
        ReDim $ahTicksY[$i + 1]
        $ahTicksY[$i] = GUICtrlCreateLabel("", $aGraphArray[2] - 5, _
                ($aGraphArray[3] + $aGraphArray[5]) - (($aGraphArray[5] / $iYTicks) * ($i - 1)), 5, 1)
        GUICtrlSetBkColor(-1, 0x000000)
        GUICtrlSetState(-1, 128)
    Next
    ;----- delete any existing labels -----
    For $i = 1 To (UBound($ahTicksLabelsY) - 1)
        GUICtrlDelete($ahTicksLabelsY[$i])
    Next
    Dim $ahTicksLabelsY[1]
    ;----- create new labels -----
    For $i = 1 To $iYTicks + 1
        ReDim $ahTicksLabelsY[$i + 1]
        $ahTicksLabelsY[$i] = GUICtrlCreateLabel("", $aGraphArray[2] - 40, _
                ($aGraphArray[3] + $aGraphArray[5]) - (($aGraphArray[5] / $iYTicks) * ($i - 1)) - 6, 30, 13, 2)
        GUICtrlSetBkColor(-1, -2)
    Next
    ;----- if labels are required, then fill -----
    If $bLabels = 1 Then
        For $i = 1 To (UBound($ahTicksLabelsY) - 1)
            GUICtrlSetData($ahTicksLabelsY[$i], StringFormat("%." & $iRound & "f", _GraphGDIPlus_Reference_Pixel("p", _
                    (($i - 1) * ($aGraphArray[5] / $iYTicks)), $aGraphArray[8], $aGraphArray[9], $aGraphArray[5])))
        Next
    EndIf
    ;----- load created arrays back into array -----
    $aGraphArray[12] = $ahTicksY
    $aGraphArray[13] = $ahTicksLabelsY
EndFunc   ;==>_GraphGDIPlus_Set_RangeY



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Start
; Description ...: Move starting point of plot
; Syntax.........: _GraphGDIPlus_Plot_Start(ByRef $aGraphArray,$iX,$iY)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iX - x value to start at
;                    $iY - y value to start at
; ========================================================================================
Func _GraphGDIPlus_Plot_Start(ByRef $aGraphArray, $iX, $iY)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- MOVE pen to start point -----
    $aGraphArray[18] = _GraphGDIPlus_Reference_Pixel("x", $iX, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4])
    $aGraphArray[19] = _GraphGDIPlus_Reference_Pixel("y", $iY, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5])
EndFunc   ;==>_GraphGDIPlus_Plot_Start



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Line
; Description ...: draws straight line to x,y from previous point / starting point
; Syntax.........: _GraphGDIPlus_Plot_Line(ByRef $aGraphArray,$iX,$iY)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iX - x value to draw to
;                    $iY - y value to draw to
; ========================================================================================
Func _GraphGDIPlus_Plot_Line(ByRef $aGraphArray, $iX, $iY)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- Draw line from previous point to new point -----
    $iX = _GraphGDIPlus_Reference_Pixel("x", $iX, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4])
    $iY = _GraphGDIPlus_Reference_Pixel("y", $iY, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5])
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], $aGraphArray[18], $aGraphArray[19], $iX, $iY, $aGraphArray[20])
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- save current as last coords -----
    $aGraphArray[18] = $iX
    $aGraphArray[19] = $iY
EndFunc   ;==>_GraphGDIPlus_Plot_Line



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Point
; Description ...: draws point at coords
; Syntax.........: _GraphGDIPlus_Plot_Point(ByRef $aGraphArray,$iX,$iY)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iX - x value to draw at
;                    $iY - y value to draw at
; ========================================================================================
Func _GraphGDIPlus_Plot_Point(ByRef $aGraphArray, $iX, $iY)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- Draw point from previous point to new point -----
    $iX = _GraphGDIPlus_Reference_Pixel("x", $iX, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4])
    $iY = _GraphGDIPlus_Reference_Pixel("y", $iY, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5])
    _GDIPlus_GraphicsDrawRect($aGraphArray[17], $iX-1, $iY-1, 2, 2, $aGraphArray[20])
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- save current as last coords -----
    $aGraphArray[18] = $iX
    $aGraphArray[19] = $iY
EndFunc   ;==>_GraphGDIPlus_Plot_Point



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Dot
; Description ...: draws single pixel dot at coords
; Syntax.........: _GraphGDIPlus_Plot_Dot(ByRef $aGraphArray,$iX,$iY)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iX - x value to draw at
;                    $iY - y value to draw at
; ========================================================================================
Func _GraphGDIPlus_Plot_Dot(ByRef $aGraphArray, $iX, $iY)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- Draw point from previous point to new point -----
    $iX = _GraphGDIPlus_Reference_Pixel("x", $iX, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4])
    $iY = _GraphGDIPlus_Reference_Pixel("y", $iY, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5])
    _GDIPlus_GraphicsDrawRect($aGraphArray[17], $iX, $iY, 1, 1, $aGraphArray[20]) ;draws 2x2 dot ?HOW to get 1x1 pixel?????
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- save current as last coords -----
    $aGraphArray[18] = $iX
    $aGraphArray[19] = $iY
EndFunc   ;==>_GraphGDIPlus_Plot_Dot



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_PenColor
; Description ...: sets the Color for the next drawing
; Syntax.........: _GraphGDIPlus_Set_PenColor(ByRef $aGraphArray,$hColor,$hBkGrdColor = $GUI_GR_NOBKColor)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $hColor - the Color of the next item (ARGB)
; ========================================================================================
Func _GraphGDIPlus_Set_PenColor(ByRef $aGraphArray, $hColor)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- apply pen Color -----
    _GDIPlus_PenSetColor($aGraphArray[20], $hColor)
EndFunc   ;==>_GraphGDIPlus_Set_PenColor



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_PenSize
; Description ...: sets the pen for the next drawing
; Syntax.........: _GraphGDIPlus_Set_PenSize(ByRef $aGraphArray,$iSize = 1)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iSize - size of pen line
; ========================================================================================
Func _GraphGDIPlus_Set_PenSize(ByRef $aGraphArray, $iSize = 1)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- apply pen size -----
    _GDIPlus_PenSetWidth($aGraphArray[20], $iSize)
EndFunc   ;==>_GraphGDIPlus_Set_PenSize



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_PenDash
; Description ...: sets the pen dash style for the next drawing
; Syntax.........: GraphGDIPlus_Set_PenDash(ByRef $aGraphArray,$iDash = 0)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iDash - style of dash, where:
;                                       0 = solid line
;                                       1 = simple dashed line
;                                       2 = simple dotted line
;                                       3 = dash dot line
;                                       4 = dash dot dot line
; ========================================================================================
Func _GraphGDIPlus_Set_PenDash(ByRef $aGraphArray, $iDash = 0)
    If IsArray($aGraphArray) = 0 Then Return
    Local $Style
    Switch $iDash
        Case 0 ;solid line _____
            $Style = $GDIP_DASHSTYLESOLID
        Case 1 ;simple dash -----
            $Style = $GDIP_DASHSTYLEDASH
        Case 2 ;simple dotted .....
            $Style = $GDIP_DASHSTYLEDOT
        Case 3 ;dash dot -.-.-
            $Style = $GDIP_DASHSTYLEDASHDOT
        Case 4 ;dash dot dot -..-..-..
            $Style = $GDIP_DASHSTYLEDASHDOTDOT
    EndSwitch
    ;----- apply pen dash -----
    _GDIPlus_PenSetDashStyle($aGraphArray[20], $Style)
EndFunc   ;==>_GraphGDIPlus_Set_PenDash



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_GridX
; Description ...: Adds X gridlines.
; Syntax.........: _GraphGDIPlus_Set_GridX(ByRef $aGraphArray, $Ticks=1, $hColor=0xf0f0f0)
; Parameters ....:  $aGraphArray - the array returned from _GraphGDIPlus_Create
;                   $Ticks - sets line at every nth unit assigned to axis
;                   $hColor - [optional] RGB value, defining Color of grid. Default is a light gray
;                   $hColorY0 - [optional] RGB value, defining Color of Y=0 line, Default black
; =======================================================================================
Func _GraphGDIPlus_Set_GridX(ByRef $aGraphArray, $Ticks = 1, $hColor = 0xFFf0f0f0, $hColorY0 = 0xFF000000)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- Set gpen to user color -----
    _GDIPlus_PenSetColor($aGraphArray[23], $hColor)
    ;----- draw grid lines -----
    Select
        Case $Ticks > 0
            For $i = $aGraphArray[6] To $aGraphArray[7] Step $Ticks
                If $i = Number($aGraphArray[6]) Or $i = Number($aGraphArray[7]) Then ContinueLoop
                _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
                        _GraphGDIPlus_Reference_Pixel("x", $i, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4]), _
                        1, _
                        _GraphGDIPlus_Reference_Pixel("x", $i, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4]), _
                        $aGraphArray[5] - 1, _
                        $aGraphArray[23])
            Next
    EndSelect
    ;----- draw y=0 -----
    _GDIPlus_PenSetColor($aGraphArray[23], $hColorY0)
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
            _GraphGDIPlus_Reference_Pixel("x", 0, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4]), _
            1, _
            _GraphGDIPlus_Reference_Pixel("x", 0, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4]), _
            $aGraphArray[5] - 1, _
            $aGraphArray[23])
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
            1, _
            _GraphGDIPlus_Reference_Pixel("y", 0, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5]), _
            $aGraphArray[4] - 1, _
            _GraphGDIPlus_Reference_Pixel("y", 0, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5]), _
            $aGraphArray[23])

    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- re-set to user specs -----
    _GDIPlus_PenSetColor($aGraphArray[23], $hColor) ;set Color back to user def
EndFunc   ;==>_GraphGDIPlus_Set_GridX



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_GridY
; Description ...: Adds Y gridlines.
; Syntax.........: _GraphGDIPlus_Set_GridY(ByRef $aGraphArray, $Ticks=1, $hColor=0xf0f0f0)
; Parameters ....:  $aGraphArray - the array returned from _GraphGDIPlus_Create
;                   $Ticks - sets line at every nth unit assigned to axis
;                   $hColor - [optional] RGB value, defining Color of grid. Default is a light gray
;                   $hColorX0 - [optional] RGB value, defining Color of X=0 line, Default black
; =======================================================================================
Func _GraphGDIPlus_Set_GridY(ByRef $aGraphArray, $Ticks = 1, $hColor = 0xFFf0f0f0, $hColorX0 = 0xFF000000)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- Set gpen to user color -----
    _GDIPlus_PenSetColor($aGraphArray[23], $hColor)
    ;----- draw grid lines -----
    Select
        Case $Ticks > 0
            For $i = $aGraphArray[8] To $aGraphArray[9] Step $Ticks
                If $i = Number($aGraphArray[8]) Or $i = Number($aGraphArray[9]) Then ContinueLoop
                _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
                        1, _
                        _GraphGDIPlus_Reference_Pixel("y", $i, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5]), _
                        $aGraphArray[4] - 1, _
                        _GraphGDIPlus_Reference_Pixel("y", $i, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5]), _
                        $aGraphArray[23])
            Next
    EndSelect
    ;----- draw abcissa/ordinate -----
    _GDIPlus_PenSetColor($aGraphArray[23], $hColorX0)
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
            _GraphGDIPlus_Reference_Pixel("x", 0, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4]), _
            1, _
            _GraphGDIPlus_Reference_Pixel("x", 0, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4]), _
            $aGraphArray[5] - 1, _
            $aGraphArray[23])
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
            1, _
            _GraphGDIPlus_Reference_Pixel("y", 0, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5]), _
            $aGraphArray[4] - 1, _
            _GraphGDIPlus_Reference_Pixel("y", 0, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5]), _
            $aGraphArray[23])

    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- re-set to user specs -----
    _GDIPlus_PenSetColor($aGraphArray[23], $hColor) ;set Color back to user def
EndFunc   ;==>_GraphGDIPlus_Set_GridY



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_RedrawRect
; Description ...: INTERNAL FUNCTION - Re-draws the border
; Syntax.........: _GraphGDIPlus_RedrawRect(ByRef $aGraphArray)
; Parameters ....:     $aGraphArray - the array returned from _GraphGDIPlus_Create
; Notes..........: This prevents drawing over the border of the graph area
; =========================================================================================
Func _GraphGDIPlus_RedrawRect(ByRef $aGraphArray)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- draw border -----
    _GDIPlus_GraphicsDrawRect($aGraphArray[17], 0, 0, $aGraphArray[4], $aGraphArray[5], $aGraphArray[22]) ;draw border
EndFunc   ;==>_GraphGDIPlus_RedrawRect



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Reference_Pixel
; Description ...: INTERNAL FUNCTION - performs pixel reference calculations
; Syntax.........: _GraphGDIPlus_Reference_Pixel($iType,$iValue,$iLow,$iHigh,$iTotalPixels)
; Parameters ....:     $iType - "x"=x axis pix, "y" = y axis pix, "p"=value from pixels
;                    $iValue - pixels reference or value
;                    $iLow - lower limit of axis
;                    $iHigh - upper limit of axis
;                    $iTotalPixels - total number of pixels in range (either width or height)
; =========================================================================================
Func _GraphGDIPlus_Reference_Pixel($iType, $iValue, $iLow, $iHigh, $iTotalPixels)
    ;----- perform pixel reference calculations -----
    Switch $iType
        Case "x"
            Return (($iTotalPixels / ($iHigh - $iLow)) * (($iHigh - $iLow) * (($iValue - $iLow) / ($iHigh - $iLow))))
        Case "y"
            Return ($iTotalPixels - (($iTotalPixels / ($iHigh - $iLow)) * (($iHigh - $iLow) * (($iValue - $iLow) / ($iHigh - $iLow)))))
        Case "p"
            Return ($iValue / ($iTotalPixels / ($iHigh - $iLow))) + $iLow
    EndSwitch
EndFunc   ;==>_GraphGDIPlus_Reference_Pixel

Thanks To:

joseLB for looking at adding grid lines in the original UDF

monoceres for the e-x-c-e-l-l-e-n-t GDI+ double buffer template

UEZ for suggesting anti-aliasing (now included by default)

winux38 for pointing out an error

Edited February 20, 2010 by andybiochem

UEZ · October 22, 2009

Nice work!

What about a function _GraphGDIPlus_SaveImage()?

UEZ

insignia96 · October 23, 2009

I love this. Very very good work

andybiochem · October 27, 2009

Updated 27/10/09

- due to a hideous over-sight on my part, I've had to update the way that "WM_ACTIVATE" is registered by using a global var in the

UDF... so DON'T use "$aGraphGDIPlusaGraphArrayINTERNAL" in your script pls!! (couldn't think of any other way to do this)

- Using _GraphGDIPlus_Clear will remove grid-lines too. You will need to redraw these using _GraphGDIPlus_Set_Grid... after clearing

- updated to allow setting color of the x=0 and y=0 lines when visible (when using -ve and +ve axes)

- updated to allow user to decide whether to shut down GDI+ completely when deleting the graph (you may have your own graphics etc)

- updated to declare all vars as Local in functions. Sorry if you had problems with this, no excuses, entirely my fault.

- updated to clean up pen use

- added pen line-dash option

The updates should NOT be script breaking, unless you are manually using Pen vars/handles from the returned graph array.

.

Edited October 27, 2009 by andybiochem

KaFu · October 27, 2009

Looks really nice, for sure will be useful at some point , 5 stars from me!

P.S.: Update the Example to point to #include "GraphGDIPlus_UDF.au3".

andybiochem · October 27, 2009

P.S.: Update the Example to point to #include "GraphGDIPlus_UDF.au3".

Does it give you an error as #include "GraphGDIPlus UDF.au3" ???

I tried changing it:

N:\General Scripts\ANDY UDFs\test.au3(1,10) : ERROR: can't open include file "GraphGDIPlus_UDF.au3"

??

.

KaFu · October 27, 2009

Not really a problem if with or without an underscore , both filenames work fine. Just that the attached UDF download above contains an underscore in the filename and the include in the example code does not.

Edited October 27, 2009 by KaFu

UEZ · October 27, 2009

Here a modification of your GraphGDIPlus UDF.au:

#include-once
#include <GDIplus.au3>

Opt ("GUICoordMode", 1)

Global $aGraphGDIPlusaGraphArrayINTERNAL

; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Create
; Description ...: Creates graph area, and prepares array of specified data
; Syntax.........: _GraphGDIPlus_Create($hWnd,$iLeft,$iTop,$iWidth,$iHeight,$hColorBorder = 0xFF000000,$hColorFill = 0xFFFFFFFF)
; Parameters ....:  $hWnd - Handle to GUI
;                   $iLeft - left most position in GUI
;   $iTop - top most position in GUI
;   $iWidth - width of graph in pixels
;   $iHeight - height of graph in pixels
;                   $hColorBorder - Color of graph border (ARGB)
;                   $hColorFill - Color of background (ARGB)
; Return values .: Returns array containing variables for subsequent functions...
;   Returned Graph array is:
;   [1] graphic control handle
;   [2] left
;   [3] top
;   [4] width
;   [5] height
;   [6] x low
;   [7] x high
;   [8] y low
;   [9] y high
;   [10] x ticks handles
;   [11] x labels handles
;   [12] y ticks handles
;   [13] y labels handles
;        [14] Border Color
;        [15] Fill Color
;        [16] Bitmap Handle
;        [17] Backbuffer Handle
;        [18] Last used x pos
;        [19] Last used y pos
;        [20] Pen (main) Handle
;        [21] Brush (fill) Handle
;        [22] Pen (border) Handle
;        [23] Pen (grid) Handle
; =======================================================================================
Func _GraphGDIPlus_Create($hWnd,$iLeft,$iTop,$iWidth,$iHeight,$hColorBorder = 0xFF000000,$hColorFill = 0xFFFFFFFF)
    Local $graphics,$bitmap,$backbuffer,$brush,$bpen,$gpen,$pen
    Local $ahTicksLabelsX[1]
    Local $ahTicksLabelsY[1]
    Local $ahTicksX[1]
    Local $ahTicksY[1]
    Local $aGraphArray[1]

    ;----- Set GUI transparency to SOLID (prevents GDI+ glitches) -----
    WinSetTrans($hWnd,"",255)
    ;----- GDI+ Initiate -----
    _GDIPlus_Startup()
    $graphics=_GDIPlus_GraphicsCreateFromHWND($hWnd)                ;graphics area
    $bitmap=_GDIPlus_BitmapCreateFromGraphics($iWidth+1,$iHeight+1,$graphics);buffer bitmap
    $backbuffer=_GDIPlus_ImageGetGraphicsContext($bitmap)           ;buffer area
    _GDIPlus_GraphicsSetSmoothingMode($backbuffer, 4)
    ;----- Set background Color -----
    $brush = _GDIPlus_BrushCreateSolid($hColorFill)
    _GDIPlus_GraphicsfillRect($backbuffer,0,0,$iWidth,$iHeight,$brush)
    ;----- Set border Pen + color -----
    $bpen = _GDIPlus_PenCreate($hColorBorder)
    _GDIPlus_PenSetEndCap($bpen,$GDIP_LINECAPROUND)
    ;----- Set Grid Pen + color -----
    $gpen = _GDIPlus_PenCreate(0xFFf0f0f0)
    _GDIPlus_PenSetEndCap($gpen,$GDIP_LINECAPROUND)
    ;----- set Drawing Pen + Color -----
    $pen = _GDIPlus_PenCreate() ;drawing pen initially black, user to set
    _GDIPlus_PenSetEndCap($pen,$GDIP_LINECAPROUND)
    _GDIPlus_GraphicsDrawRect($backbuffer,0,0,$iWidth,$iHeight,$pen)
    ;----- draw -----
    _GDIPlus_GraphicsDrawImageRect($graphics,$bitmap,$iLeft,$iTop,$iWidth+1,$iHeight+1)
    ;----- register redraw -----
    GUIRegisterMsg(0x0006,"_GraphGDIPlus_ReDraw")
    ;----- prep + load array -----
    Dim $aGraphArray[24] = ["",$graphics,$iLeft,$iTop,$iWidth,$iHeight,0,1,0,1, _
    $ahTicksX,$ahTicksLabelsX,$ahTicksY,$ahTicksLabelsY,$hColorBorder,$hColorFill, _
    $bitmap,$backbuffer,0,0,$pen,$brush,$bpen,$gpen]
    $aGraphGDIPlusaGraphArrayINTERNAL = $aGraphArray
    Return $aGraphArray
EndFunc
Func _GraphGDIPlus_ReDraw($hWnd)
    ;----- Allows redraw of the GDI+ Image upon window min/maximize -----
    _WinAPI_RedrawWindow($hWnd,0,0,0x0100)
    _GraphGDIPlus_Refresh($aGraphGDIPlusaGraphArrayINTERNAL)
EndFunc



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Delete
; Description ...: Deletes previously created graph and related ticks/labels
; Syntax.........: _GraphGDIPlus_Delete($hWnd,ByRef $aGraphArray)
; Parameters ....:  $hWnd - GUI handle
;                   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                   $iKeepGDIPlus - if not zero, function will not _GDIPlus_Shutdown()
; =======================================================================================
Func _GraphGDIPlus_Delete($hWnd,ByRef $aGraphArray,$iKeepGDIPlus = 0)
    Local $ahTicksX,$ahTicksLabelsX,$ahTicksY,$ahTicksLabelsY,$i
    ;----- delete x ticks/labels -----
    $ahTicksX = $aGraphArray[10]
    $ahTicksLabelsX = $aGraphArray[11]
    For $i = 1 to (UBound($ahTicksX) - 1)
    GUICtrlDelete($ahTicksX[$i])
    Next
    For $i = 1 to (UBound($ahTicksLabelsX) - 1)
    GUICtrlDelete($ahTicksLabelsX[$i])
    Next
    ;----- delete y ticks/labels -----
    $ahTicksY = $aGraphArray[12]
    $ahTicksLabelsY = $aGraphArray[13]
    For $i = 1 to (UBound($ahTicksY) - 1)
    GUICtrlDelete($ahTicksY[$i])
    Next
    For $i = 1 to (UBound($ahTicksLabelsY) - 1)
    GUICtrlDelete($ahTicksLabelsY[$i])
    Next
    ;----- delete graphic control -----
    _GDIPlus_GraphicsDispose($aGraphArray[17])
    _GDIPlus_BitmapDispose($aGraphArray[16])
    _GDIPlus_GraphicsDispose($aGraphArray[1])
    _GDIPlus_BrushDispose($aGraphArray[21])
    _GDIPlus_PenDispose($aGraphArray[20])
    _GDIPlus_PenDispose($aGraphArray[22])
    _GDIPlus_PenDispose($aGraphArray[23])
    If $iKeepGDIPlus = 0 Then _GDIPlus_Shutdown()
    _WinAPI_InvalidateRect($hWnd)
    ;----- close array -----
    $aGraphArray = 0
EndFunc



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Clear
; Description ...: Clears graph content
; Syntax.........: _GraphGDIPlus_Clear(ByRef $aGraphArray)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; =======================================================================================
Func _GraphGDIPlus_Clear(ByRef $aGraphArray)
    ;----- Set background Color -----
    _GDIPlus_GraphicsfillRect($aGraphArray[17],0,0,$aGraphArray[4],$aGraphArray[5], $aGraphArray[21])
    ;----- set border + Color -----
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- draw -----
    _GDIPlus_GraphicsDrawImageRect($aGraphArray[1],$aGraphArray[16],$aGraphArray[2],$aGraphArray[3],$aGraphArray[4]+1,$aGraphArray[5]+1)
EndFunc



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Set_RangeX
; Description ...: Allows user to set the range of the X axis and set ticks and rounding levels
; Syntax.........: _GraphGDIPlus_Set_RangeX(ByRef $aGraphArray,$iLow,$iHigh,$iXTicks = 1,$bLabels = 1,$iRound = 0)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
;   $iLow - the lowest value for the X axis (can be negative)
;   $iHigh - the highest value for the X axis
;   $iXTicks - [optional] number of ticks to show below axis, if = 0 then no ticks created
;   $bLabels - [optional] 1=show labels, any other number=do not show labels
;   $iRound - [optional] rounding level of label values
; =======================================================================================
Func _GraphGDIPlus_Set_RangeX(ByRef $aGraphArray,$iLow,$iHigh,$iXTicks = 1,$bLabels = 1,$iRound = 0)
    Local $ahTicksX,$ahTicksLabelsX,$i
    ;----- load user vars to array -----
    $aGraphArray[6] = $iLow
    $aGraphArray[7] = $iHigh
    ;----- prepare nested array -----
    $ahTicksX = $aGraphArray[10]
    $ahTicksLabelsX = $aGraphArray[11]
    ;----- delete any existing ticks -----
    For $i = 1 to (UBound($ahTicksX) - 1)
    GUICtrlDelete($ahTicksX[$i])
    Next
    Dim $ahTicksX[1]
    ;----- create new ticks -----
    For $i = 1 To $iXTicks + 1
    ReDim $ahTicksX[$i + 1]
    $ahTicksX[$i] = GUICtrlCreateLabel("",(($i - 1) * ($aGraphArray[4] / $iXTicks)) + $aGraphArray[2], _
        $aGraphArray[3] + $aGraphArray[5],1,5)
    GUICtrlSetBkcolor(-1,0x000000)
    GUICtrlSetState(-1,128)
    Next
    ;----- delete any existing labels -----
    For $i = 1 to (UBound($ahTicksLabelsX) - 1)
    GUICtrlDelete($ahTicksLabelsX[$i])
    Next
    Dim $ahTicksLabelsX[1]
    ;----- create new labels -----
    For $i = 1 To $iXTicks + 1
    ReDim $ahTicksLabelsX[$i + 1]
    $ahTicksLabelsX[$i] = GUICtrlCreateLabel("", _
    ($aGraphArray[2] + (($aGraphArray[4] / $iXTicks) * ($i - 1))) - (($aGraphArray[4] / $iXTicks) / 2), _
    $aGraphArray[3] + $aGraphArray[5] + 10,$aGraphArray[4] / $iXTicks,13,1)
        GUICtrlSetBkcolor(-1,-2)
    Next
    ;----- if labels are required, then fill -----
    If $bLabels = 1 Then
    For $i = 1 To (UBound($ahTicksLabelsX) - 1)
    GUICtrlSetData($ahTicksLabelsX[$i], _
    StringFormat("%." & $iRound & "f",_GraphGDIPlus_Reference_Pixel("p",(($i - 1) * ($aGraphArray[4] / $iXTicks)), _
    $aGraphArray[6],$aGraphArray[7],$aGraphArray[4])))
    Next
    EndIf
    ;----- load created arrays back into array -----
    $aGraphArray[10] = $ahTicksX
    $aGraphArray[11] = $ahTicksLabelsX
EndFunc



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Set_RangeY
; Description ...: Allows user to set the range of the Y axis and set ticks and rounding levels
; Syntax.........: _GraphGDIPlus_SetRange_Y(ByRef $aGraphArray,$iLow,$iHigh,$iYTicks = 1,$bLabels = 1,$iRound = 0)
; Parameters ....:  $aGraphArray - the array returned from _GraphGDIPlus_Create
;   $iLow - the lowest value for the Y axis (can be negative)
;   $iHigh - the highest value for the Y axis
;   $iYTicks - [optional] number of ticks to show next to axis, if = 0 then no ticks created
;   $bLabels - [optional] 1=show labels, any other number=do not show labels
;   $iRound - [optional] rounding level of label values
; =======================================================================================
Func _GraphGDIPlus_Set_RangeY(ByRef $aGraphArray,$iLow,$iHigh,$iYTicks = 1,$bLabels = 1,$iRound = 0)
    Local $ahTicksY,$ahTicksLabelsY,$i
    ;----- load user vars to array -----
    $aGraphArray[8] = $iLow
    $aGraphArray[9] = $iHigh
    ;----- prepare nested array -----
    $ahTicksY = $aGraphArray[12]
    $ahTicksLabelsY = $aGraphArray[13]
    ;----- delete any existing ticks -----
    For $i = 1 to (UBound($ahTicksY) - 1)
    GUICtrlDelete($ahTicksY[$i])
    Next
    Dim $ahTicksY[1]
    ;----- create new ticks -----
    For $i = 1 To $iYTicks + 1
    ReDim $ahTicksY[$i + 1]
    $ahTicksY[$i] = GUICtrlCreateLabel("",$aGraphArray[2] - 5, _
    ($aGraphArray[3] + $aGraphArray[5]) - (($aGraphArray[5] / $iYTicks) * ($i - 1)),5,1)
    GUICtrlSetBkcolor(-1,0x000000)
    GUICtrlSetState(-1,128)
    Next
    ;----- delete any existing labels -----
    For $i = 1 to (UBound($ahTicksLabelsY) - 1)
    GUICtrlDelete($ahTicksLabelsY[$i])
    Next
    Dim $ahTicksLabelsY[1]
    ;----- create new labels -----
    For $i = 1 To $iYTicks + 1
    ReDim $ahTicksLabelsY[$i + 1]
    $ahTicksLabelsY[$i] = GUICtrlCreateLabel("",$aGraphArray[2] - 40, _
    ($aGraphArray[3] + $aGraphArray[5]) - (($aGraphArray[5] / $iYTicks) * ($i - 1)) - 6,30,13,2)
        GUICtrlSetBkcolor(-1,-2)
    Next
    ;----- if labels are required, then fill -----
    If $bLabels = 1 Then
    For $i = 1 To (UBound($ahTicksLabelsY) - 1)
    GUICtrlSetData($ahTicksLabelsY[$i],StringFormat("%." & $iRound & "f",_GraphGDIPlus_Reference_Pixel("p", _
    (($i - 1) * ($aGraphArray[5] / $iYTicks)),$aGraphArray[8],$aGraphArray[9],$aGraphArray[5])))
    Next
    EndIf
    ;----- load created arrays back into array -----
    $aGraphArray[12] = $ahTicksY
    $aGraphArray[13] = $ahTicksLabelsY
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Start
; Description ...: Move starting point of plot
; Syntax.........: _GraphGDIPlus_Plot_Start(ByRef $aGraphArray,$iX,$iY)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
;   $iX - x value to start at
;   $iY - y value to start at
; ========================================================================================
Func _GraphGDIPlus_Plot_Start(ByRef $aGraphArray,$iX,$iY)
    ;----- MOVE pen to start point -----
    $aGraphArray[18] = _GraphGDIPlus_Reference_Pixel("x",$iX,$aGraphArray[6],$aGraphArray[7],$aGraphArray[4])
    $aGraphArray[19] = _GraphGDIPlus_Reference_Pixel("y",$iY,$aGraphArray[8],$aGraphArray[9],$aGraphArray[5])
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Line
; Description ...: draws straight line to x,y from previous point / starting point
; Syntax.........: _GraphGDIPlus_Plot_Line(ByRef $aGraphArray,$iX,$iY)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
;   $iX - x value to draw to
;   $iY - y value to draw to
; ========================================================================================
Func _GraphGDIPlus_Plot_Line(ByRef $aGraphArray,$iX,$iY)
    ;----- Draw line from previous point to new point -----
    $iX = _GraphGDIPlus_Reference_Pixel("x",$iX,$aGraphArray[6],$aGraphArray[7],$aGraphArray[4])
    $iY = _GraphGDIPlus_Reference_Pixel("y",$iY,$aGraphArray[8],$aGraphArray[9],$aGraphArray[5])
    _GDIPlus_GraphicsDrawLine($aGraphArray[17],$aGraphArray[18],$aGraphArray[19],$iX,$iY,$aGraphArray[20])
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- save current as last coords -----
    $aGraphArray[18] = $iX
    $aGraphArray[19] = $iY
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Point
; Description ...: draws point at coords
; Syntax.........: _GraphGDIPlus_Plot_Point(ByRef $aGraphArray,$iX,$iY)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
;   $iX - x value to draw at
;   $iY - y value to draw at
; ========================================================================================
Func _GraphGDIPlus_Plot_Point(ByRef $aGraphArray,$iX,$iY)
    ;----- Draw point from previous point to new point -----
    $iX = _GraphGDIPlus_Reference_Pixel("x",$iX,$aGraphArray[6],$aGraphArray[7],$aGraphArray[4])
    $iY = _GraphGDIPlus_Reference_Pixel("y",$iY,$aGraphArray[8],$aGraphArray[9],$aGraphArray[5])
    _GDIPlus_GraphicsDrawRect($aGraphArray[17],$iX-1,$iY-1,2,2,$aGraphArray[20])
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- save current as last coords -----
    $aGraphArray[18] = $iX
    $aGraphArray[19] = $iY
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Dot
; Description ...: draws single pixel dot at coords
; Syntax.........: _GraphGDIPlus_Plot_Dot(ByRef $aGraphArray,$iX,$iY)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
;   $iX - x value to draw at
;   $iY - y value to draw at
; ========================================================================================
Func _GraphGDIPlus_Plot_Dot(ByRef $aGraphArray,$iX,$iY)
    ;----- Draw point from previous point to new point -----
    $iX = _GraphGDIPlus_Reference_Pixel("x",$iX,$aGraphArray[6],$aGraphArray[7],$aGraphArray[4])
    $iY = _GraphGDIPlus_Reference_Pixel("y",$iY,$aGraphArray[8],$aGraphArray[9],$aGraphArray[5])
    _GDIPlus_GraphicsDrawRect($aGraphArray[17],$iX,$iY,1,1,$aGraphArray[20]) ;draws 2x2 dot ?HOW to get 1x1 pixel?????
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- save current as last coords -----
    $aGraphArray[18] = $iX
    $aGraphArray[19] = $iY
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_PenColor
; Description ...: sets the Color for the next drawing
; Syntax.........: _GraphGDIPlus_Set_PenColor(ByRef $aGraphArray,$hColor,$hBkGrdColor = $GUI_GR_NOBKColor)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
;   $hColor - the Color of the next item (ARGB)
; ========================================================================================
Func _GraphGDIPlus_Set_PenColor(ByRef $aGraphArray,$hColor)
    ;----- apply pen Color -----
    _GDIPlus_PenSetColor($aGraphArray[20],$hColor)
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_PenSize
; Description ...: sets the pen for the next drawing
; Syntax.........: _GraphGDIPlus_Set_PenSize(ByRef $aGraphArray,$iSize = 1)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
;   $iSize - size of pen line
; ========================================================================================
Func _GraphGDIPlus_Set_PenSize(ByRef $aGraphArray,$iSize = 1)
    ;----- apply pen size -----
    _GDIPlus_PenSetWidth($aGraphArray[20],$iSize)
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_PenDash
; Description ...: sets the pen dash style for the next drawing
; Syntax.........: GraphGDIPlus_Set_PenDash(ByRef $aGraphArray,$iDash = 0)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
;   $iDash - style of dash, where:
;                                       0 = solid line
;                                       1 = simple dashed line
;                                       2 = simple dotted line
;                                       3 = dash dot line
;                                       4 = dash dot dot line
; ========================================================================================
Func _GraphGDIPlus_Set_PenDash(ByRef $aGraphArray,$iDash = 0)
    Local $Style

    Switch $iDash
        Case 0 ;solid line _____
            $Style = $GDIP_DASHSTYLESOLID
        Case 1 ;simple dash -----
            $Style = $GDIP_DASHSTYLEDASH
        Case 2 ;simple dotted .....
            $Style = $GDIP_DASHSTYLEDOT
        Case 3 ;dash dot -.-.-
            $Style = $GDIP_DASHSTYLEDASHDOT
        Case 4 ;dash dot dot -..-..-..
            $Style = $GDIP_DASHSTYLEDASHDOTDOT
    EndSwitch

    ;----- apply pen dash -----
    _GDIPlus_PenSetDashStyle($aGraphArray[20],$Style)
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_GridX
; Description ...: Adds X gridlines.
; Syntax.........: _GraphGDIPlus_Set_GridX(ByRef $aGraphArray, $Ticks=1, $hColor=0xf0f0f0)
; Parameters ....:  $aGraphArray - the array returned from _GraphGDIPlus_Create
;                   $Ticks - sets line at every nth unit assigned to axis
;                   $hColor - [optional] RGB value, defining Color of grid. Default is a light gray
;                   $hColorY0 - [optional] RGB value, defining Color of Y=0 line, Default black
; =======================================================================================
Func _GraphGDIPlus_Set_GridX(ByRef $aGraphArray, $Ticks=1, $hColor=0xFFf0f0f0, $hColorY0=0xFF000000)
    ;----- Set gpen to user color -----
    _GDIPlus_PenSetColor($aGraphArray[23],$hColor)
    ;----- draw grid lines -----
    Select
        Case $Ticks > 0
            For $i = $aGraphArray[6] To $aGraphArray[7] Step $Ticks
                If $i = Number($aGraphArray[6]) Or $i = Number($aGraphArray[7]) Then ContinueLoop
                    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
                    _GraphGDIPlus_Reference_Pixel("x",$i,$aGraphArray[6],$aGraphArray[7],$aGraphArray[4]), _
                    1, _
                    _GraphGDIPlus_Reference_Pixel("x",$i,$aGraphArray[6],$aGraphArray[7],$aGraphArray[4]), _
                    $aGraphArray[5] - 1, _
                    $aGraphArray[23])
            Next
    EndSelect
    ;----- draw y=0 -----
    _GDIPlus_PenSetColor($aGraphArray[23],$hColorY0)
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
    _GraphGDIPlus_Reference_Pixel("x",0,$aGraphArray[6],$aGraphArray[7],$aGraphArray[4]), _
    1, _
    _GraphGDIPlus_Reference_Pixel("x",0,$aGraphArray[6],$aGraphArray[7],$aGraphArray[4]), _
    $aGraphArray[5] - 1, _
    $aGraphArray[23])
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
    1, _
    _GraphGDIPlus_Reference_Pixel("y",0,$aGraphArray[8],$aGraphArray[9],$aGraphArray[5]), _
    $aGraphArray[4] - 1, _
    _GraphGDIPlus_Reference_Pixel("y",0,$aGraphArray[8],$aGraphArray[9],$aGraphArray[5]), _
    $aGraphArray[23])
    ;----- re-set to user specs -----
    _GDIPlus_PenSetColor($aGraphArray[23],$hColor) ;set Color back to user def
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_GridY
; Description ...: Adds Y gridlines.
; Syntax.........: _GraphGDIPlus_Set_GridY(ByRef $aGraphArray, $Ticks=1, $hColor=0xf0f0f0)
; Parameters ....:  $aGraphArray - the array returned from _GraphGDIPlus_Create
;                   $Ticks - sets line at every nth unit assigned to axis
;                   $hColor - [optional] RGB value, defining Color of grid. Default is a light gray
;                   $hColorX0 - [optional] RGB value, defining Color of X=0 line, Default black
; =======================================================================================
Func _GraphGDIPlus_Set_GridY(ByRef $aGraphArray, $Ticks=1, $hColor=0xFFf0f0f0, $hColorX0=0xFF000000)
    ;----- Set gpen to user color -----
    _GDIPlus_PenSetColor($aGraphArray[23],$hColor)
    ;----- draw grid lines -----
    Select
        Case $Ticks > 0
            For $i = $aGraphArray[8] To $aGraphArray[9] Step $Ticks
                If $i = Number($aGraphArray[8]) Or $i = Number($aGraphArray[9]) Then ContinueLoop
                    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
                    1, _
                    _GraphGDIPlus_Reference_Pixel("y",$i,$aGraphArray[8],$aGraphArray[9],$aGraphArray[5]), _
                    $aGraphArray[4] - 1, _
                    _GraphGDIPlus_Reference_Pixel("y",$i,$aGraphArray[8],$aGraphArray[9],$aGraphArray[5]), _
                    $aGraphArray[23])
            Next
    EndSelect
    ;----- draw abcissa/ordinate -----
    _GDIPlus_PenSetColor($aGraphArray[23],$hColorX0)
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
    _GraphGDIPlus_Reference_Pixel("x",0,$aGraphArray[6],$aGraphArray[7],$aGraphArray[4]), _
    1, _
    _GraphGDIPlus_Reference_Pixel("x",0,$aGraphArray[6],$aGraphArray[7],$aGraphArray[4]), _
    $aGraphArray[5] - 1, _
    $aGraphArray[23])
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
    1, _
    _GraphGDIPlus_Reference_Pixel("y",0,$aGraphArray[8],$aGraphArray[9],$aGraphArray[5]), _
    $aGraphArray[4] - 1, _
    _GraphGDIPlus_Reference_Pixel("y",0,$aGraphArray[8],$aGraphArray[9],$aGraphArray[5]), _
    $aGraphArray[23])
    ;----- re-set to user specs -----
    _GDIPlus_PenSetColor($aGraphArray[23],$hColor) ;set Color back to user def
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Refresh
; Description ...: refreshes the graphic
; Syntax.........: _GraphGDIPlus_Refresh(ByRef $aGraphArray)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; ========================================================================================
Func _GraphGDIPlus_Refresh(ByRef $aGraphArray)
    ;----- draw -----
    _GDIPlus_GraphicsDrawImageRect($aGraphArray[1],$aGraphArray[16],$aGraphArray[2], _
    $aGraphArray[3],$aGraphArray[4]+1,$aGraphArray[5]+1)
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_RedrawRect
; Description ...: INTERNAL FUNCTION - Re-draws the border
; Syntax.........: _GraphGDIPlus_RedrawRect(ByRef $aGraphArray)
; Parameters ....:  $aGraphArray - the array returned from _GraphGDIPlus_Create
; Notes..........: This prevents drawing over the border of the graph area
; =========================================================================================
Func _GraphGDIPlus_RedrawRect(ByRef $aGraphArray)
    ;----- draw border -----
    _GDIPlus_GraphicsDrawRect($aGraphArray[17],0,0,$aGraphArray[4],$aGraphArray[5],$aGraphArray[22]) ;draw border
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Reference_Pixel
; Description ...: INTERNAL FUNCTION - performs pixel reference calculations
; Syntax.........: _GraphGDIPlus_Reference_Pixel($iType,$iValue,$iLow,$iHigh,$iTotalPixels)
; Parameters ....:  $iType - "x"=x axis pix, "y" = y axis pix, "p"=value from pixels
;   $iValue - pixels reference or value
;   $iLow - lower limit of axis
;   $iHigh - upper limit of axis
;   $iTotalPixels - total number of pixels in range (either width or height)
; =========================================================================================
Func _GraphGDIPlus_Reference_Pixel($iType,$iValue,$iLow,$iHigh,$iTotalPixels)
;----- perform pixel reference calculations -----
    Switch $iType
    Case "x"
    Return (($iTotalPixels/($iHigh-$iLow))*(($iHigh-$iLow)*(($iValue-$iLow)/($iHigh-$iLow))))
    Case "y"
    Return ($iTotalPixels - (($iTotalPixels/($iHigh-$iLow))*(($iHigh-$iLow)*(($iValue-$iLow)/($iHigh-$iLow)))))
    Case "p"
    Return ($iValue / ($iTotalPixels/ ($iHigh - $iLow))) + $iLow
    EndSwitch
EndFunc


; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_SaveImage
; Description ...: INTERNAL FUNCTION - save drawn image to file
; Syntax.........: _GraphGDIPlus_Reference_Pixel($file, $hWnd)
; Parameters ....: $file - filename
;   $hWnd - handle to GUI
; Autor .........: ptrex, ProgAndy, UEZ
; =========================================================================================
Func _GraphGDIPlus_SaveImage($file, $hWnd)
    Local $hDC, $memBmp, $memDC, $hImage, $w, $h
    Const $SRCCOPY = 0x00CC0020
    If $file <> "" And $hWnd <> "" Then
        $size = WinGetClientSize($hWnd)
        $w = $size[0]
        $h = $size[1]
        $hDC = _WinAPI_GetDC($hWnd)
        $memDC = _WinAPI_CreateCompatibleDC($hDC)
        $memBmp = _WinAPI_CreateCompatibleBitmap($hDC, $w, $h)
        _WinAPI_SelectObject ($memDC, $memBmp)
        _WinAPI_BitBlt($memDC, 0, 0, $w, $h, $hDC, 0, 0, $SRCCOPY)
        $hImage = _GDIPlus_BitmapCreateFromHBITMAP ($memBmp)
        _GDIPlus_ImageSaveToFile($hImage, $file)
        If @error Then
            Return SetError(1, 0, 0)
        Else
            Return SetError(0, 0, 0)
        EndIf
        _GDIPlus_ImageDispose ($hImage)
        _WinAPI_ReleaseDC($hWnd, $hDC)
        _WinAPI_DeleteDC($memDC)
        _WinAPI_DeleteObject ($memBmp)
    Else
        Return SetError(1, 0, 0)
    EndIf
EndFunc

Added function _GraphGDIPlus_SaveImage() and anti aliasing (_GDIPlus_GraphicsSetSmoothingMode($backbuffer, 4)) for smoother display of the graph lines.

When you add the line _GraphGDIPlus_SaveImage(@ScriptDir & "\test.jpg", $GUI) to your example above

...

_Draw_Graph()

_GraphGDIPlus_SaveImage(@ScriptDir & "\test.jpg", $GUI)

While 1
 Sleep(100)
WEnd

...

it will save the content of the GUI to a jpg file!

UEZ

Edited November 9, 2009 by UEZ

winux38 · February 14, 2010

EXCELLENT UDF very usefull. very good job

- Added function to control Smooth mode (_GraphGDIPlus_SmoothMode(ByRef $aGraphArray,$iMode=0)

-added array for $aGraphGDIPlusaGraphArrayINTERNAL to allow several instance of graphic in the same window. Unfortunatlly works well with 2 but not with 3?? (Sorry I am not an expert in GDI).

- Formated file to make it more UDF like.

- Added enum to get named offset in $aGraphArray instead of literal value.

#include-once
#include <GDIplus.au3>
; #INDEX# =======================================================================================================================
; Title .........: GraphGDIPlus_UDF
; AutoIt Version : 3.2.10++
; Language ......: English
; Description ...: This module contains various functions for manipulating Graph object
; ===============================================================================================================================


; #CURRENT# =====================================================================================================================
;_GraphGDIPlus_Create
;_GraphGDIPlus_Delete
;_GraphGDIPlus_ReDraw
;_GraphGDIPlus_Clear
;_GraphGDIPlus_Set_RangeX
;_GraphGDIPlus_Set_RangeY
;_GraphGDIPlus_Plot_Start
;_GraphGDIPlus_Plot_Line
;_GraphGDIPlus_Plot_Point
;_GraphGDIPlus_Plot_Dot
;_GraphGDIPlus_Set_PenColor
;_GraphGDIPlus_Set_PenSize
;_GraphGDIPlus_Set_PenDash
;_GraphGDIPlus_Set_GridX
;_GraphGDIPlus_Set_GridY
;_GraphGDIPlus_Refresh
;_GraphGDIPlus_SaveImage
;_GraphGDIPlus_SmoothMode
; ===============================================================================================================================

; #INTERNAL_USE_ONLY#============================================================================================================
; _GraphGDIPlus_RedrawRect
; _GraphGDIPlus_Reference_Pixel
; ===============================================================================================================================

; Offset for fields in $GraphArray
Local  Enum     $_GRAPH_NOUSE       = 0 , _ ; [0] Not used
                $_GRAPH_HANDLE          , _ ; [1] graphic control handle
                $_GRAPH_LEFT            , _ ; [2] left
                $_GRAPH_TOP             , _ ; [3] top
                $_GRAPH_WIDTH           , _ ; [4] width
                $_GRAPH_HEIGHT          , _ ; [5] height
                $_GRAPH_XLOW            , _ ; [6] x low 
                $_GRAPH_XHIGH           , _ ; [7] x high
                $_GRAPH_YLOW            , _ ; [8] y low
                $_GRAPH_YHIGH           , _ ; [9] y high
                $_GRAPH_HXTICKS         , _ ; [10] x ticks handles
                $_GRAPH_HXLABELS        , _ ; [11] x labels handles
                $_GRAPH_HYTICKS         , _ ; [12] y ticks handles
                $_GRAPH_HYLABELS        , _ ; [13] y labels handles
                $_GRAPH_BORDERCOLOR     , _ ; [14] Border Color
                $_GRAPH_FILLCOLOR       , _ ; [15] Fill Color
                $_GRAPH_HBITMAP         , _ ; [16] Bitmap Handle
                $_GRAPH_HBACKBUFFER     , _ ; [17] Backbuffer Handle
                $_GRAPH_LASTXPOS        , _ ; [18] Last used x pos
                $_GRAPH_LASTYPOS        , _ ; [19] Last used y pos
                $_GRAPH_HPEN            , _ ; [20] Pen (main) Handle
                $_GRAPH_HBRUSH          , _ ; [21] Brush (fill) Handle
                $_GRAPH_HPENBORDER      , _ ; [22] Pen (border) Handle
                $_GRAPH_HPENGRID        , _ ; [23] Pen (grid) Handle
                $_GRAPH_INTERNALINDEX   , _ ; [24] Index in internal graph array
                $_GRAPH_SMOOTHMODE      , _ ; [25] Smooth mode(default=0)
                $_GRAPH_SIZE                ; must be the last one

Global $aGraphGDIPlusaGraphArrayINTERNAL[1]
; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Create
; Description ...: Creates graph area, and prepares array of specified data
; Syntax.........: _GraphGDIPlus_Create($hWnd,$iLeft,$iTop,$iWidth,$iHeight,$hColorBorder = 0xFF000000,$hColorFill = 0xFFFFFFFF)
; Parameters ....:  $hWnd - Handle to GUI
;                   $iLeft - left most position in GUI
;                   $iTop - top most position in GUI
;                   $iWidth - width of graph in pixels
;                   $iHeight - height of graph in pixels
;                   $hColorBorder - Color of graph border (ARGB)
;                   $hColorFill - Color of background (ARGB)
; Return values .: Returns array containing variables for subsequent functions...
;                    Returned Graph array is:
;                    [1] graphic control handle
;                    [2] left
;                    [3] top
;                    [4] width
;                    [5] height
;                    [6] x low
;                    [7] x high
;                    [8] y low
;                    [9] y high
;                    [10] x ticks handles
;                    [11] x labels handles
;                    [12] y ticks handles
;                    [13] y labels handles
;                    [14] Border Color
;                    [15] Fill Color
;                    [16] Bitmap Handle
;                    [17] Backbuffer Handle
;                    [18] Last used x pos
;                    [19] Last used y pos
;                    [20] Pen (main) Handle
;                    [21] Brush (fill) Handle
;                    [22] Pen (border) Handle
;                    [23] Pen (grid) Handle
;                    [24] Index in internal graph array
;                    [25] Smooth mode (default=0)
; =======================================================================================
Func _GraphGDIPlus_Create($hWnd,$iLeft,$iTop,$iWidth,$iHeight,$hColorBorder = 0xFF000000,$hColorFill = 0xFFFFFFFF)
    Local $graphics,$bitmap,$backbuffer,$brush,$bpen,$gpen,$pen
    Local $ahTicksLabelsX[1]
    Local $ahTicksLabelsY[1]
    Local $ahTicksX[1]
    Local $ahTicksY[1]
    Local $aGraphArray[1]
    local $i
    
    ;----- Set GUI transparency to SOLID (prevents GDI+ glitches) -----
    WinSetTrans($hWnd,"",255)
    ;----- GDI+ Initiate -----
    _GDIPlus_Startup()
    $graphics=_GDIPlus_GraphicsCreateFromHWND($hWnd)                ;graphics area
    $bitmap=_GDIPlus_BitmapCreateFromGraphics($iWidth+1,$iHeight+1,$graphics);buffer bitmap
    $backbuffer=_GDIPlus_ImageGetGraphicsContext($bitmap)           ;buffer area
    _GDIPlus_GraphicsSetSmoothingMode($backbuffer, 0)
    ;----- Set background Color -----
    $brush =  _GDIPlus_BrushCreateSolid($hColorFill)
    _GDIPlus_GraphicsfillRect($backbuffer,0,0,$iWidth,$iHeight,$brush)
    ;----- Set border Pen + color -----
    $bpen = _GDIPlus_PenCreate($hColorBorder)
    _GDIPlus_PenSetEndCap($bpen,$GDIP_LINECAPROUND)
    ;----- Set Grid Pen + color -----
    $gpen = _GDIPlus_PenCreate(0xFFf0f0f0)
    _GDIPlus_PenSetEndCap($gpen,$GDIP_LINECAPROUND)
    ;----- set Drawing Pen + Color -----
    $pen = _GDIPlus_PenCreate() ;drawing pen initially black, user to set
    _GDIPlus_PenSetEndCap($pen,$GDIP_LINECAPROUND)
    _GDIPlus_GraphicsDrawRect($backbuffer,0,0,$iWidth,$iHeight,$pen)
    ;----- draw -----
    _GDIPlus_GraphicsDrawImageRect($graphics,$bitmap,$iLeft,$iTop,$iWidth+1,$iHeight+1)
    ;----- register redraw -----
    GUIRegisterMsg(0x0006,"_GraphGDIPlus_ReDraw")
    ;----- prep + load array -----
    Dim $aGraphArray[$_GRAPH_SIZE] = ["", _
                                    $graphics, _                 ; [1] graphic control handle
                                    $iLeft,$iTop, _              ; [2] left, [3] top
                                    $iWidth,$iHeight, _          ; [4] width, [5] height
                                    0,1,0,1, _                   ; [6] x low, [7] x high, [8] y low, [9] y high
                                    $ahTicksX,$ahTicksLabelsX, _ ; [10] x ticks handles, [11] x labels handles
                                    $ahTicksY,$ahTicksLabelsY, _ ; [12] y ticks handles, [13] y labels handles
                                    $hColorBorder,$hColorFill, _ ; [14] Border Color, [15] Fill Color
                                    $bitmap,$backbuffer, _       ; [16] Bitmap Handle, [17] Backbuffer Handle
                                    0,0, _                       ; [18] Last used x pos, [19] Last used y pos
                                    $pen,$brush,$bpen,$gpen, _   ; [20] Pen (main) Handle, [21] Brush (fill) Handle, [22] Pen (border) Handle, [23] Pen (grid) Handle
                                    -1,0]                        ; [24] Index in $aGraphGDIPlusaGraphArrayINTERNAL, [25] Smooth mode

    $aGraphGDIPlusaGraphArrayINTERNAL[UBound($aGraphGDIPlusaGraphArrayINTERNAL,1)-1] = $aGraphArray
    $aGraphArray[$_GRAPH_INTERNALINDEX] = UBound($aGraphGDIPlusaGraphArrayINTERNAL,1)-1
    redim $aGraphGDIPlusaGraphArrayINTERNAL[UBound($aGraphGDIPlusaGraphArrayINTERNAL,1)+1]
    $aGraphGDIPlusaGraphArrayINTERNAL[UBound($aGraphGDIPlusaGraphArrayINTERNAL,1)-1]=-1

Return $aGraphArray
EndFunc


; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_ReDraw
; Description ...: redraw of the GDI+ Image upon window min/maximize
; Syntax.........: _GraphGDIPlus_Delete($hWnd)
; Parameters ....:  $hWnd - GUI handle
; Return values .: None
; =======================================================================================
Func _GraphGDIPlus_ReDraw($hWnd)
    local $i
    ;----- Allows redraw of the GDI+ Image upon window min/maximize -----
    _WinAPI_RedrawWindow($hWnd,0,0,0x0100)
    for $i=0 to UBound($aGraphGDIPlusaGraphArrayINTERNAL,1)-1
        if $aGraphGDIPlusaGraphArrayINTERNAL[$i] <> -1 then
            _GraphGDIPlus_Refresh($aGraphGDIPlusaGraphArrayINTERNAL[$i])
        EndIf
    Next
EndFunc



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Delete
; Description ...: Deletes previously created graph and related ticks/labels
; Syntax.........: _GraphGDIPlus_Delete($hWnd,ByRef $aGraphArray)
; Parameters ....:  $hWnd - GUI handle
;                   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                   $iKeepGDIPlus - if not zero, function will not _GDIPlus_Shutdown()
; Return values .: None
; =======================================================================================
Func _GraphGDIPlus_Delete($hWnd,ByRef $aGraphArray,$iKeepGDIPlus = 0)
    Local $ahTicksX,$ahTicksLabelsX,$ahTicksY,$ahTicksLabelsY,$i
    ;----- delete x ticks/labels -----
    $ahTicksX = $aGraphArray[$_GRAPH_HXTICKS]
    $ahTicksLabelsX = $aGraphArray[$_GRAPH_HXLABELS]
    For $i = 1 to (UBound($ahTicksX) - 1)
        GUICtrlDelete($ahTicksX[$i])
    Next
    For $i = 1 to (UBound($ahTicksLabelsX) - 1)
        GUICtrlDelete($ahTicksLabelsX[$i])
    Next
    ;----- delete y ticks/labels -----
    $ahTicksY = $aGraphArray[$_GRAPH_HYTICKS]
    $ahTicksLabelsY = $aGraphArray[$_GRAPH_HYLABELS]
    For $i = 1 to (UBound($ahTicksY) - 1)
        GUICtrlDelete($ahTicksY[$i])
    Next
    For $i = 1 to (UBound($ahTicksLabelsY) - 1)
        GUICtrlDelete($ahTicksLabelsY[$i])
    Next
    ;----- delete graphic control -----
    _GDIPlus_GraphicsDispose($aGraphArray[$_GRAPH_HBACKBUFFER])
    _GDIPlus_BitmapDispose($aGraphArray[$_GRAPH_HBITMAP])
    _GDIPlus_GraphicsDispose($aGraphArray[$_GRAPH_HANDLE])
    _GDIPlus_BrushDispose($aGraphArray[$_GRAPH_HBRUSH])
    _GDIPlus_PenDispose($aGraphArray[$_GRAPH_HPEN])
    _GDIPlus_PenDispose($aGraphArray[$_GRAPH_HPENBORDER])
    _GDIPlus_PenDispose($aGraphArray[$_GRAPH_HPENGRID])
    If $iKeepGDIPlus = 0 Then _GDIPlus_Shutdown()
    _WinAPI_InvalidateRect($hWnd)
    
    ;----- Remove entry in $aGraphGDIPlusaGraphArrayINTERNAL -----
    $aGraphGDIPlusaGraphArrayINTERNAL[$aGraphArray [$_GRAPH_INTERNALINDEX]]=-1  

    ;----- close array -----
    $aGraphArray = 0
EndFunc



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Clear
; Description ...: Clears graph content
; Syntax.........: _GraphGDIPlus_Clear(ByRef $aGraphArray)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; Return values .: None
; =======================================================================================
Func _GraphGDIPlus_Clear(ByRef $aGraphArray)
    ;----- Set background Color -----
    _GDIPlus_GraphicsfillRect($aGraphArray[$_GRAPH_HBACKBUFFER],0,0,$aGraphArray[$_GRAPH_WIDTH],$aGraphArray[$_GRAPH_HEIGHT], $aGraphArray[$_GRAPH_HBRUSH])
    ;----- set border + Color -----
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- draw -----
    _GDIPlus_GraphicsDrawImageRect($aGraphArray[$_GRAPH_HANDLE],$aGraphArray[$_GRAPH_HBITMAP],$aGraphArray[$_GRAPH_LEFT],$aGraphArray[$_GRAPH_TOP],$aGraphArray[$_GRAPH_WIDTH]+1,$aGraphArray[$_GRAPH_HEIGHT]+1)
EndFunc



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Set_RangeX
; Description ...: Allows user to set the range of the X axis and set ticks and rounding levels
; Syntax.........: _GraphGDIPlus_Set_RangeX(ByRef $aGraphArray,$iLow,$iHigh,$iXTicks = 1,$bLabels = 1,$iRound = 0)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iLow - the lowest value for the X axis (can be negative)
;                    $iHigh - the highest value for the X axis
;                    $iXTicks - [optional] number of ticks to show below axis, if = 0 then no ticks created
;                    $bLabels - [optional] 1=show labels, any other number=do not show labels
;                    $iRound - [optional] rounding level of label values
; Return values .: None
; =======================================================================================
Func _GraphGDIPlus_Set_RangeX(ByRef $aGraphArray,$iLow,$iHigh,$iXTicks = 1,$bLabels = 1,$iRound = 0)
    Local $ahTicksX,$ahTicksLabelsX,$i
    ;----- load user vars to array -----
    $aGraphArray[$_GRAPH_XLOW] = $iLow
    $aGraphArray[$_GRAPH_XHIGH] = $iHigh
    ;----- prepare nested array -----
    $ahTicksX = $aGraphArray[$_GRAPH_HXTICKS]
    $ahTicksLabelsX = $aGraphArray[$_GRAPH_HXLABELS]
    ;----- delete any existing ticks -----
    For $i = 1 to (UBound($ahTicksX) - 1)
        GUICtrlDelete($ahTicksX[$i])
    Next
    Dim $ahTicksX[1]
    ;----- create new ticks -----
    For $i = 1 To $iXTicks + 1
        ReDim $ahTicksX[$i + 1]
        $ahTicksX[$i] = GUICtrlCreateLabel("",(($i - 1) * ($aGraphArray[$_GRAPH_WIDTH] / $iXTicks)) + $aGraphArray[$_GRAPH_LEFT], _
        $aGraphArray[$_GRAPH_TOP] + $aGraphArray[$_GRAPH_HEIGHT],1,5)
        GUICtrlSetBkcolor(-1,0x000000)
        GUICtrlSetState(-1,128)
    Next
    ;----- delete any existing labels -----
    For $i = 1 to (UBound($ahTicksLabelsX) - 1)
        GUICtrlDelete($ahTicksLabelsX[$i])
    Next
    Dim $ahTicksLabelsX[1]
    ;----- create new labels -----
    For $i = 1 To $iXTicks + 1
        ReDim $ahTicksLabelsX[$i + 1]
        $ahTicksLabelsX[$i] = GUICtrlCreateLabel("", _
        ($aGraphArray[$_GRAPH_LEFT] + (($aGraphArray[$_GRAPH_WIDTH] / $iXTicks) * ($i - 1))) - (($aGraphArray[$_GRAPH_WIDTH] / $iXTicks) / 2), _
        $aGraphArray[$_GRAPH_TOP] + $aGraphArray[$_GRAPH_HEIGHT] + 10,$aGraphArray[$_GRAPH_WIDTH] / $iXTicks,13,1)
        GUICtrlSetBkcolor(-1,-2)
    Next
    ;----- if labels are required, then fill -----
    If $bLabels = 1 Then
        For $i = 1 To (UBound($ahTicksLabelsX) - 1)
            GUICtrlSetData($ahTicksLabelsX[$i], _
            StringFormat("%." & $iRound & "f",_GraphGDIPlus_Reference_Pixel("p",(($i - 1) * ($aGraphArray[$_GRAPH_WIDTH] / $iXTicks)), _
            $aGraphArray[$_GRAPH_XLOW],$aGraphArray[$_GRAPH_XHIGH],$aGraphArray[$_GRAPH_WIDTH])))
        Next
    EndIf
    ;----- load created arrays back into array -----
    $aGraphArray[$_GRAPH_HXTICKS] = $ahTicksX
    $aGraphArray[$_GRAPH_HXLABELS] = $ahTicksLabelsX
EndFunc



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Set_RangeY
; Description ...: Allows user to set the range of the Y axis and set ticks and rounding levels
; Syntax.........: _GraphGDIPlus_SetRange_Y(ByRef $aGraphArray,$iLow,$iHigh,$iYTicks = 1,$bLabels = 1,$iRound = 0)
; Parameters ....:    $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iLow - the lowest value for the Y axis (can be negative)
;                    $iHigh - the highest value for the Y axis
;                    $iYTicks - [optional] number of ticks to show next to axis, if = 0 then no ticks created
;                    $bLabels - [optional] 1=show labels, any other number=do not show labels
;                    $iRound - [optional] rounding level of label values
; Return values .: None
; =======================================================================================
Func _GraphGDIPlus_Set_RangeY(ByRef $aGraphArray,$iLow,$iHigh,$iYTicks = 1,$bLabels = 1,$iRound = 0)
    Local $ahTicksY,$ahTicksLabelsY,$i
    ;----- load user vars to array -----
    $aGraphArray[$_GRAPH_YLOW] = $iLow
    $aGraphArray[$_GRAPH_YHIGH] = $iHigh
    ;----- prepare nested array -----
    $ahTicksY = $aGraphArray[$_GRAPH_HYTICKS]
    $ahTicksLabelsY = $aGraphArray[$_GRAPH_HYLABELS]
    ;----- delete any existing ticks -----
    For $i = 1 to (UBound($ahTicksY) - 1)
        GUICtrlDelete($ahTicksY[$i])
    Next
    Dim $ahTicksY[1]
    ;----- create new ticks -----
    For $i = 1 To $iYTicks + 1
        ReDim $ahTicksY[$i + 1]
        $ahTicksY[$i] = GUICtrlCreateLabel("",$aGraphArray[$_GRAPH_LEFT] - 5, _
        ($aGraphArray[$_GRAPH_TOP] + $aGraphArray[$_GRAPH_HEIGHT]) - (($aGraphArray[$_GRAPH_HEIGHT] / $iYTicks) * ($i - 1)),5,1)
        GUICtrlSetBkcolor(-1,0x000000)
        GUICtrlSetState(-1,128)
    Next
    ;----- delete any existing labels -----
    For $i = 1 to (UBound($ahTicksLabelsY) - 1)
        GUICtrlDelete($ahTicksLabelsY[$i])
    Next
    Dim $ahTicksLabelsY[1]
    ;----- create new labels -----
    For $i = 1 To $iYTicks + 1
        ReDim $ahTicksLabelsY[$i + 1]
        $ahTicksLabelsY[$i] = GUICtrlCreateLabel("",$aGraphArray[$_GRAPH_LEFT] - 40, _
        ($aGraphArray[$_GRAPH_TOP] + $aGraphArray[$_GRAPH_HEIGHT]) - (($aGraphArray[$_GRAPH_HEIGHT] / $iYTicks) * ($i - 1)) - 6,30,13,2)
        GUICtrlSetBkcolor(-1,-2)
    Next
    ;----- if labels are required, then fill -----
    If $bLabels = 1 Then
        For $i = 1 To (UBound($ahTicksLabelsY) - 1)
            GUICtrlSetData($ahTicksLabelsY[$i],StringFormat("%." & $iRound & "f",_GraphGDIPlus_Reference_Pixel("p", _
            (($i - 1) * ($aGraphArray[$_GRAPH_HEIGHT] / $iYTicks)),$aGraphArray[$_GRAPH_YLOW],$aGraphArray[$_GRAPH_YHIGH],$aGraphArray[$_GRAPH_HEIGHT])))
        Next
    EndIf
    ;----- load created arrays back into array -----
    $aGraphArray[$_GRAPH_HYTICKS] = $ahTicksY
    $aGraphArray[$_GRAPH_HYLABELS] = $ahTicksLabelsY
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Start
; Description ...: Move starting point of plot
; Syntax.........: _GraphGDIPlus_Plot_Start(ByRef $aGraphArray,$iX,$iY)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iX - x value to start at
;                    $iY - y value to start at
; Return values .: None
; ========================================================================================
Func _GraphGDIPlus_Plot_Start(ByRef $aGraphArray,$iX,$iY)
    ;----- MOVE pen to start point -----
    $aGraphArray[$_GRAPH_LASTXPOS] = _GraphGDIPlus_Reference_Pixel("x",$iX,$aGraphArray[$_GRAPH_XLOW],$aGraphArray[$_GRAPH_XHIGH],$aGraphArray[$_GRAPH_WIDTH])
    $aGraphArray[$_GRAPH_LASTYPOS] = _GraphGDIPlus_Reference_Pixel("y",$iY,$aGraphArray[$_GRAPH_YLOW],$aGraphArray[$_GRAPH_YHIGH],$aGraphArray[$_GRAPH_HEIGHT])
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Line
; Description ...: draws straight line to x,y from previous point / starting point
; Syntax.........: _GraphGDIPlus_Plot_Line(ByRef $aGraphArray,$iX,$iY)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iX - x value to draw to
;                    $iY - y value to draw to
; Return values .: None
; ========================================================================================
Func _GraphGDIPlus_Plot_Line(ByRef $aGraphArray,$iX,$iY)
    ;----- Draw line from previous point to new point -----
    $iX = _GraphGDIPlus_Reference_Pixel("x",$iX,$aGraphArray[$_GRAPH_XLOW],$aGraphArray[$_GRAPH_XHIGH],$aGraphArray[$_GRAPH_WIDTH])
    $iY = _GraphGDIPlus_Reference_Pixel("y",$iY,$aGraphArray[$_GRAPH_YLOW],$aGraphArray[$_GRAPH_YHIGH],$aGraphArray[$_GRAPH_HEIGHT])
    _GDIPlus_GraphicsDrawLine($aGraphArray[$_GRAPH_HBACKBUFFER],$aGraphArray[$_GRAPH_LASTXPOS],$aGraphArray[$_GRAPH_LASTYPOS],$iX,$iY,$aGraphArray[$_GRAPH_HPEN])
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- save current as last coords -----
    $aGraphArray[$_GRAPH_LASTXPOS] = $iX
    $aGraphArray[$_GRAPH_LASTYPOS] = $iY
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Point
; Description ...: draws point at coords
; Syntax.........: _GraphGDIPlus_Plot_Point(ByRef $aGraphArray,$iX,$iY)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iX - x value to draw at
;                    $iY - y value to draw at
; Return values .: None
; ========================================================================================
Func _GraphGDIPlus_Plot_Point(ByRef $aGraphArray,$iX,$iY)
    ;----- Draw point from previous point to new point -----
    $iX = _GraphGDIPlus_Reference_Pixel("x",$iX,$aGraphArray[$_GRAPH_XLOW],$aGraphArray[$_GRAPH_XHIGH],$aGraphArray[$_GRAPH_WIDTH])
    $iY = _GraphGDIPlus_Reference_Pixel("y",$iY,$aGraphArray[$_GRAPH_YLOW],$aGraphArray[$_GRAPH_YHIGH],$aGraphArray[$_GRAPH_HEIGHT])
    _GDIPlus_GraphicsDrawRect($aGraphArray[$_GRAPH_HBACKBUFFER],$iX-1,$iY-1,2,2,$aGraphArray[$_GRAPH_HPEN])
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- save current as last coords -----
    $aGraphArray[$_GRAPH_LASTXPOS] = $iX
    $aGraphArray[$_GRAPH_LASTYPOS] = $iY
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Dot
; Description ...: draws single pixel dot at coords
; Syntax.........: _GraphGDIPlus_Plot_Dot(ByRef $aGraphArray,$iX,$iY)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iX - x value to draw at
;                    $iY - y value to draw at
; Return values .: None
; ========================================================================================
Func _GraphGDIPlus_Plot_Dot(ByRef $aGraphArray,$iX,$iY)
    ;----- Draw point from previous point to new point -----
    $iX = _GraphGDIPlus_Reference_Pixel("x",$iX,$aGraphArray[$_GRAPH_XLOW],$aGraphArray[$_GRAPH_XHIGH],$aGraphArray[$_GRAPH_WIDTH])
    $iY = _GraphGDIPlus_Reference_Pixel("y",$iY,$aGraphArray[$_GRAPH_YLOW],$aGraphArray[$_GRAPH_YHIGH],$aGraphArray[$_GRAPH_HEIGHT])
    _GDIPlus_GraphicsDrawRect($aGraphArray[$_GRAPH_HBACKBUFFER],$iX,$iY,1,1,$aGraphArray[$_GRAPH_HPEN]) ;draws 2x2 dot ?HOW to get 1x1 pixel?????
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- save current as last coords -----
    $aGraphArray[$_GRAPH_LASTXPOS] = $iX
    $aGraphArray[$_GRAPH_LASTYPOS] = $iY
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_PenColor
; Description ...: sets the Color for the next drawing
; Syntax.........: _GraphGDIPlus_Set_PenColor(ByRef $aGraphArray,$hColor,$hBkGrdColor = $GUI_GR_NOBKColor)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $hColor - the Color of the next item (ARGB)
; Return values .: None
; ========================================================================================
Func _GraphGDIPlus_Set_PenColor(ByRef $aGraphArray,$hColor)
    ;----- apply pen Color -----
    _GDIPlus_PenSetColor($aGraphArray[$_GRAPH_HPEN],$hColor)
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_PenSize
; Description ...: sets the pen for the next drawing
; Syntax.........: _GraphGDIPlus_Set_PenSize(ByRef $aGraphArray,$iSize = 1)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iSize - size of pen line
; Return values .: None
; ========================================================================================
Func _GraphGDIPlus_Set_PenSize(ByRef $aGraphArray,$iSize = 1)
    ;----- apply pen size -----
    _GDIPlus_PenSetWidth($aGraphArray[$_GRAPH_HPEN],$iSize)
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_PenDash
; Description ...: sets the pen dash style for the next drawing
; Syntax.........: GraphGDIPlus_Set_PenDash(ByRef $aGraphArray,$iDash = 0)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                    $iDash - style of dash, where:
;                                       0 = solid line
;                                       1 = simple dashed line
;                                       2 = simple dotted line
;                                       3 = dash dot line
;                                       4 = dash dot dot line
; Return values .: None
; ========================================================================================
Func _GraphGDIPlus_Set_PenDash(ByRef $aGraphArray,$iDash = 0)
    Local $Style

    Switch $iDash
        Case 0 ;solid line _____
            $Style = $GDIP_DASHSTYLESOLID
        Case 1 ;simple dash -----
            $Style = $GDIP_DASHSTYLEDASH
        Case 2 ;simple dotted .....
            $Style = $GDIP_DASHSTYLEDOT
        Case 3 ;dash dot -.-.-
            $Style = $GDIP_DASHSTYLEDASHDOT
        Case 4 ;dash dot dot -..-..-..
            $Style = $GDIP_DASHSTYLEDASHDOTDOT
    EndSwitch

    ;----- apply pen dash -----
    _GDIPlus_PenSetDashStyle($aGraphArray[$_GRAPH_HPEN],$Style)
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_GridX
; Description ...: Adds X gridlines.
; Syntax.........: _GraphGDIPlus_Set_GridX(ByRef $aGraphArray, $Ticks=1, $hColor=0xf0f0f0)
; Parameters ....:  $aGraphArray - the array returned from _GraphGDIPlus_Create
;                   $Ticks - sets line at every nth unit assigned to axis
;                   $hColor - [optional] RGB value, defining Color of grid. Default is a light gray
;                   $hColorY0 - [optional] RGB value, defining Color of Y=0 line, Default black
; Return values .: None
; =======================================================================================
Func _GraphGDIPlus_Set_GridX(ByRef $aGraphArray, $Ticks=1, $hColor=0xFFf0f0f0, $hColorY0=0xFF000000)
    ;----- Set gpen to user color -----
    _GDIPlus_PenSetColor($aGraphArray[$_GRAPH_HPENGRID],$hColor)
    ;----- draw grid lines -----
    Select
        Case $Ticks > 0
            For $i = $aGraphArray[$_GRAPH_XLOW] To $aGraphArray[$_GRAPH_XHIGH] Step $Ticks
                If $i = Number($aGraphArray[$_GRAPH_XLOW]) Or $i = Number($aGraphArray[$_GRAPH_XHIGH]) Then ContinueLoop
                    _GDIPlus_GraphicsDrawLine($aGraphArray[$_GRAPH_HBACKBUFFER], _
                    _GraphGDIPlus_Reference_Pixel("x",$i,$aGraphArray[$_GRAPH_XLOW],$aGraphArray[$_GRAPH_XHIGH],$aGraphArray[$_GRAPH_WIDTH]), _
                    1, _
                    _GraphGDIPlus_Reference_Pixel("x",$i,$aGraphArray[$_GRAPH_XLOW],$aGraphArray[$_GRAPH_XHIGH],$aGraphArray[$_GRAPH_WIDTH]), _
                    $aGraphArray[$_GRAPH_HEIGHT] - 1, _
                    $aGraphArray[$_GRAPH_HPENGRID])
            Next
    EndSelect
    ;----- draw y=0 -----
    _GDIPlus_PenSetColor($aGraphArray[$_GRAPH_HPENGRID],$hColorY0)
    _GDIPlus_GraphicsDrawLine($aGraphArray[$_GRAPH_HBACKBUFFER], _
    _GraphGDIPlus_Reference_Pixel("x",0,$aGraphArray[$_GRAPH_XLOW],$aGraphArray[$_GRAPH_XHIGH],$aGraphArray[$_GRAPH_WIDTH]), _
    1, _
    _GraphGDIPlus_Reference_Pixel("x",0,$aGraphArray[$_GRAPH_XLOW],$aGraphArray[$_GRAPH_XHIGH],$aGraphArray[$_GRAPH_WIDTH]), _
    $aGraphArray[$_GRAPH_HEIGHT] - 1, _
    $aGraphArray[$_GRAPH_HPENGRID])
    _GDIPlus_GraphicsDrawLine($aGraphArray[$_GRAPH_HBACKBUFFER], _
    1, _
    _GraphGDIPlus_Reference_Pixel("y",0,$aGraphArray[$_GRAPH_YLOW],$aGraphArray[$_GRAPH_YHIGH],$aGraphArray[$_GRAPH_HEIGHT]), _
    $aGraphArray[$_GRAPH_WIDTH] - 1, _
    _GraphGDIPlus_Reference_Pixel("y",0,$aGraphArray[$_GRAPH_YLOW],$aGraphArray[$_GRAPH_YHIGH],$aGraphArray[$_GRAPH_HEIGHT]), _
    $aGraphArray[$_GRAPH_HPENGRID])
    ;----- re-set to user specs -----
    _GDIPlus_PenSetColor($aGraphArray[$_GRAPH_HPENGRID],$hColor) ;set Color back to user def
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_GridY
; Description ...: Adds Y gridlines.
; Syntax.........: _GraphGDIPlus_Set_GridY(ByRef $aGraphArray, $Ticks=1, $hColor=0xf0f0f0)
; Parameters ....:  $aGraphArray - the array returned from _GraphGDIPlus_Create
;                   $Ticks - sets line at every nth unit assigned to axis
;                   $hColor - [optional] RGB value, defining Color of grid. Default is a light gray
;                   $hColorX0 - [optional] RGB value, defining Color of X=0 line, Default black
; Return values .: None
; =======================================================================================
Func _GraphGDIPlus_Set_GridY(ByRef $aGraphArray, $Ticks=1, $hColor=0xFFf0f0f0, $hColorX0=0xFF000000)
    ;----- Set gpen to user color -----
    _GDIPlus_PenSetColor($aGraphArray[$_GRAPH_HPENGRID],$hColor)
    ;----- draw grid lines -----
    Select
        Case $Ticks > 0
            For $i = $aGraphArray[$_GRAPH_YLOW] To $aGraphArray[$_GRAPH_YHIGH] Step $Ticks
                If $i = Number($aGraphArray[$_GRAPH_YLOW]) Or $i = Number($aGraphArray[$_GRAPH_YHIGH]) Then ContinueLoop
                    _GDIPlus_GraphicsDrawLine($aGraphArray[$_GRAPH_HBACKBUFFER], _
                    1, _
                    _GraphGDIPlus_Reference_Pixel("y",$i,$aGraphArray[$_GRAPH_YLOW],$aGraphArray[$_GRAPH_YHIGH],$aGraphArray[$_GRAPH_HEIGHT]), _
                    $aGraphArray[$_GRAPH_WIDTH] - 1, _
                    _GraphGDIPlus_Reference_Pixel("y",$i,$aGraphArray[$_GRAPH_YLOW],$aGraphArray[$_GRAPH_YHIGH],$aGraphArray[$_GRAPH_HEIGHT]), _
                    $aGraphArray[$_GRAPH_HPENGRID])
            Next
    EndSelect
    ;----- draw abcissa/ordinate -----
    _GDIPlus_PenSetColor($aGraphArray[$_GRAPH_HPENGRID],$hColorX0)
    _GDIPlus_GraphicsDrawLine($aGraphArray[$_GRAPH_HBACKBUFFER], _
    _GraphGDIPlus_Reference_Pixel("x",0,$aGraphArray[$_GRAPH_XLOW],$aGraphArray[$_GRAPH_XHIGH],$aGraphArray[$_GRAPH_WIDTH]), _
    1, _
    _GraphGDIPlus_Reference_Pixel("x",0,$aGraphArray[$_GRAPH_XLOW],$aGraphArray[$_GRAPH_XHIGH],$aGraphArray[$_GRAPH_WIDTH]), _
    $aGraphArray[$_GRAPH_HEIGHT] - 1, _
    $aGraphArray[$_GRAPH_HPENGRID])
    _GDIPlus_GraphicsDrawLine($aGraphArray[$_GRAPH_HBACKBUFFER], _
    1, _
    _GraphGDIPlus_Reference_Pixel("y",0,$aGraphArray[$_GRAPH_YLOW],$aGraphArray[$_GRAPH_YHIGH],$aGraphArray[$_GRAPH_HEIGHT]), _
    $aGraphArray[$_GRAPH_WIDTH] - 1, _
    _GraphGDIPlus_Reference_Pixel("y",0,$aGraphArray[$_GRAPH_YLOW],$aGraphArray[$_GRAPH_YHIGH],$aGraphArray[$_GRAPH_HEIGHT]), _
    $aGraphArray[$_GRAPH_HPENGRID])
    ;----- re-set to user specs -----
    _GDIPlus_PenSetColor($aGraphArray[$_GRAPH_HPENGRID],$hColor) ;set Color back to user def
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Refresh
; Description ...: refreshes the graphic
; Syntax.........: _GraphGDIPlus_Refresh(ByRef $aGraphArray)
; Parameters ....:   $aGraphArray - the array returned from _GraphGDIPlus_Create
; Return values .: None
; ========================================================================================
Func _GraphGDIPlus_Refresh(ByRef $aGraphArray)
    ;----- draw -----
    _GDIPlus_GraphicsDrawImageRect($aGraphArray[$_GRAPH_HANDLE],$aGraphArray[$_GRAPH_HBITMAP],$aGraphArray[$_GRAPH_LEFT], _
    $aGraphArray[$_GRAPH_TOP],$aGraphArray[$_GRAPH_WIDTH]+1,$aGraphArray[$_GRAPH_HEIGHT]+1)
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_RedrawRect
; Description ...: INTERNAL FUNCTION - Re-draws the border
; Syntax.........: _GraphGDIPlus_RedrawRect(ByRef $aGraphArray)
; Parameters ....:     $aGraphArray - the array returned from _GraphGDIPlus_Create
; Notes..........: This prevents drawing over the border of the graph area
; Return values .: None
; =========================================================================================
Func _GraphGDIPlus_RedrawRect(ByRef $aGraphArray)
    ;----- draw border -----
    _GDIPlus_GraphicsDrawRect($aGraphArray[$_GRAPH_HBACKBUFFER],0,0,$aGraphArray[$_GRAPH_WIDTH],$aGraphArray[$_GRAPH_HEIGHT],$aGraphArray[$_GRAPH_HPENBORDER]) ;draw border
EndFunc



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Reference_Pixel
; Description ...: INTERNAL FUNCTION - performs pixel reference calculations
; Syntax.........: _GraphGDIPlus_Reference_Pixel($iType,$iValue,$iLow,$iHigh,$iTotalPixels)
; Parameters ....:     $iType - "x"=x axis pix, "y" = y axis pix, "p"=value from pixels
;                    $iValue - pixels reference or value
;                    $iLow - lower limit of axis
;                    $iHigh - upper limit of axis
;                    $iTotalPixels - total number of pixels in range (either width or height)
; Return values .: Pixel reference
; =========================================================================================
Func _GraphGDIPlus_Reference_Pixel($iType,$iValue,$iLow,$iHigh,$iTotalPixels)
;----- perform pixel reference calculations -----
    Switch $iType
        Case "x"
            Return (($iTotalPixels/($iHigh-$iLow))*(($iHigh-$iLow)*(($iValue-$iLow)/($iHigh-$iLow))))
        Case "y"
            Return ($iTotalPixels - (($iTotalPixels/($iHigh-$iLow))*(($iHigh-$iLow)*(($iValue-$iLow)/($iHigh-$iLow)))))
        Case "p"
            Return ($iValue / ($iTotalPixels/ ($iHigh - $iLow))) + $iLow
    EndSwitch
EndFunc


; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_SaveImage
; Description ...: INTERNAL FUNCTION - save drawn image to file
; Syntax.........: _GraphGDIPlus_Reference_Pixel($file, $hWnd)
; Parameters ....: $file - filename
;                  $hWnd - handle to GUI
; Return values .: Pixel reference
; Author ........: ptrex, ProgAndy, UEZ
; =========================================================================================
Func _GraphGDIPlus_SaveImage($file, $hWnd)
    Local $hDC, $memBmp, $memDC, $hImage, $w, $h
    Const $SRCCOPY = 0x00CC0020
    If $file <> "" And $hWnd <> "" Then
        $size = WinGetClientSize($hWnd)
        $w = $size[0]
        $h = $size[1]
        $hDC = _WinAPI_GetDC($hWnd)
        $memDC = _WinAPI_CreateCompatibleDC($hDC)
        $memBmp = _WinAPI_CreateCompatibleBitmap($hDC, $w, $h)
        _WinAPI_SelectObject ($memDC, $memBmp)
        _WinAPI_BitBlt($memDC, 0, 0, $w, $h, $hDC, 0, 0, $SRCCOPY)
        $hImage = _GDIPlus_BitmapCreateFromHBITMAP ($memBmp)
        _GDIPlus_ImageSaveToFile($hImage, $file)
        If @error Then
            Return SetError(1, 0, 0)
        Else
            Return SetError(0, 0, 0)
        EndIf
        _GDIPlus_ImageDispose ($hImage)
        _WinAPI_ReleaseDC($hWnd, $hDC)
        _WinAPI_DeleteDC($memDC)
        _WinAPI_DeleteObject ($memBmp)
    Else
        Return SetError(1, 0, 0)
    EndIf
EndFunc

; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_SmoothMode
; Description ...: Set smooth mode(default=1)
; Syntax.........: _GraphGDIPlus_Delete($aGraphArray,$iMode)
; Parameters ....:  $aGraphArray - GUI handle
;                   $iMode - smooth mode
;                     0 - No smooth
;                     1 - Smooth on a box of 8x4
;                     2 - Smooth on a box of 8x8
; Return values .: None
; Author .........: ptrex, ProgAndy, UEZ, winux38
; =======================================================================================
  Func _GraphGDIPlus_SmoothMode(ByRef $aGraphArray,$iMode=0)
      _GDIPlus_GraphicsSetSmoothingMode($aGraphArray[$_GRAPH_HBACKBUFFER], $iMode)
EndFunc

Below is a test script. Validating graph2 produces a strange behaviour.

#include <Array.au3>

#include "GraphGDIPlus UDF.au3"

Opt("GUIOnEventMode", 1)
local $xsize,$ysize,$k
$xsize=1000
$ysize=600
Global $iMin=-15
Global $iMax=20

;----- Create random data table -----
local $XYval[1][3], $j=0
  For $i = -5 to 5 step 0.1
    redim $XYval[$j+1][3]
    $XYval[$j][0]=$i
    $XYval[$j][1]=Random($iMin, $iMax)
    $XYval[$j][2]=""
    if $XYval[$j][1] > ($iMin+(0.75*($iMax-$iMin))) then
        $XYval[$j][2]="B"
    ElseIf $XYval[$j][1] < ($iMin+(0.25*($iMax-$iMin))) then
        $XYval[$j][2]="S"
    EndIf

    $j+=1
next



;----- Create window for graph -----
$GUI = GUICreate("",$xsize,$ysize)
GUISetOnEvent(-3,"_Exit")
GUISetState()



;----- Create area for graph0 -----
local $graph=-1
$Graph = _GraphGDIPlus_Create($GUI,40,              30,        $xsize/3,$ysize/3,0xFF000000,0xFF88B3DD)
_GraphGDIPlus_Set_RangeX($Graph,-5,5,10,1)
_GraphGDIPlus_Set_RangeY($Graph,-25,25,10,1)


;----- Create area for graph1 -----
local $graph1=-1
$Graph1 = _GraphGDIPlus_Create($GUI,80+$xsize/3,    30,         $xsize/3,$ysize/3,0xFF000000,0xFF88B3DD)
_GraphGDIPlus_Set_RangeX($Graph1,-5,5,1,1)
_GraphGDIPlus_Set_RangeY($Graph1,-50,50,1,1)
_GraphGDIPlus_SmoothMode($Graph1, 1)
;----- Create area for graph2 -----
local $graph2=-1
#cs
$Graph2 = _GraphGDIPlus_Create($GUI,40,     60+$ysize/3,        $xsize/3,$ysize/3,0xFF00FF00,0xFF88B3DD)
_GraphGDIPlus_Set_RangeX($Graph2,-5,5,1,1)
_GraphGDIPlus_Set_RangeY($Graph2,-10,50,1,1)
#ce

local $firstloop=1
While 1
    Sleep(100)

    ;----- Setup for the graph0 -----
if $graph<>-1 Then
    _PrintGraph($graph,$XYval)
EndIf

    ;----- Setup for the graph1 -----
if  $graph1<>-1 Then
    _PrintGraph($graph1,$XYval)
EndIf

    ;----- Setup for the graph2 -----
if  $graph2<>-1 Then
    _PrintGraph($graph2,$XYval)
EndIf
if $firstloop=1 Then
    $firstloop=0
    _GraphGDIPlus_SaveImage(@ScriptDir & "\test.jpg", $GUI)
EndIf

;----- left shift of value array -----
For $i=0 to UBound($XYval,1)-2
    $XYval[$i][1]=$XYval[$i+1][1]
next
$XYval[$i][1]=Random($iMin,$iMax)
$XYval[$i][2]=""
if $XYval[$i][1] > ($iMin+(0.75*($iMax-$iMin))) then
    $XYval[$i][2]="B"
ElseIf $XYval[$i][1] < ($iMin+(0.25*($iMax-$iMin))) then
    $XYval[$i][2]="S"
EndIf

WEnd



Func _Draw_Graph()
    ;----- Set line color and size -----
    _GraphGDIPlus_Set_PenColor($Graph,0xFF325D87)
    _GraphGDIPlus_Set_PenSize($Graph,2)

    ;----- draw lines -----
    $First = True
    For $i = -5 to 5 step 0.1
        $y = _X2Function($i)
        If $First = True Then _GraphGDIPlus_Plot_Start($Graph,$i,$y)
        $First = False
        _GraphGDIPlus_Set_PenColor($Graph,0xFF325D87)
        _GraphGDIPlus_Plot_Line($Graph,$i,$y)
        _GraphGDIPlus_Refresh($Graph)
    Next
EndFunc

Func _Draw_Graph1(byref $lgraph, byref $xyval)
    ;----- Set line color and size -----
    local $pencolor[4]=[0xFFFF0000, 0xFF00FF00,0xFFFFFF00,0xFFFF00FF]
    local $colorindex=0

    ;----- draw lines -----
    $First = True
    For $i=0 to UBound($xyval,1)-1
        If $First = True Then
            _GraphGDIPlus_Plot_Start($lgraph,$xyval[$i][0],$xyval[$i][1])
            $First = False
        EndIf
        
        _GraphGDIPlus_Set_PenSize($lgraph,1)
        _GraphGDIPlus_Set_PenColor($lgraph,0xFF325D87)
       _GraphGDIPlus_Plot_Line($lgraph,$xyval[$i][0],$xyval[$i][1])
        
       if $xyval[$i][1] > $iMin+(0.75*($iMax-$iMin)) Then
            _GraphGDIPlus_Set_PenSize($lgraph,4)
            _GraphGDIPlus_Set_PenColor($lgraph,$pencolor[0])
            _GraphGDIPlus_Plot_Dot($lgraph,$xyval[$i][0],$xyval[$i][1])
        ElseIf $xyval[$i][1] < $iMin+(0.25*($iMax-$iMin)) Then
            _GraphGDIPlus_Set_PenSize($lgraph,4)
            _GraphGDIPlus_Set_PenColor($lgraph,$pencolor[1])
            _GraphGDIPlus_Plot_Dot($lgraph,$xyval[$i][0],$xyval[$i][1])
        EndIf
    
        $colorindex+=1
        $colorindex =BitAND($colorindex,0x00000003)
        _GraphGDIPlus_Refresh($lgraph)
Next
EndFunc

Func _X2Function($iZ)
    Return ($iZ*$iZ)
EndFunc

Func _X3Function($iZ)
    Return $iZ^3+2*$iZ^2-$iZ
EndFunc


Func _GammaFunction($iZ)
    $nProduct = ((2^$iZ) / (1 + $iZ))
    For $n = 2 to 1000
        $nProduct *= ((1 + (1/$n))^$iZ) / (1 + ($iZ / $n))
    Next
    Return (1/$iZ) * $nProduct
EndFunc

func _PrintGraph($lgraph,$lxyval)
    _GraphGDIPlus_Clear($lgraph)
    _GraphGDIPlus_Set_GridX($lgraph,1,0xFF6993BE)
    _GraphGDIPlus_Set_GridY($lgraph,5,0xFF6993BE)
    _Draw_Graph1($lgraph, $lxyval)
EndFunc


Func _Exit()
    ;----- close down GDI+ and clear graphic -----
    _GraphGDIPlus_Delete($GUI,$Graph)
    Exit
EndFunc

andybiochem · February 20, 2010

works well with 2 but not with 3 [graphs]?? (Sorry I am not an expert in GDI).

I've just updated my original post above to correct the 'multiple graphs' issue.

The problem turned out to be an issue when using WinSetTrans with GDI+. Removing the WinSetTrans code when creating the graphs solved the problem of displaying > 2 graphs. Unfortunately left with the problem of the GDI being 'clipped' by the screen edge.

The only way I could think of correcting this was by GUIRegisterMsg 0x0003 which is WIN_MOVE. So evey time the GUI gets moved, the graphs are flushed.

Should work ok now. Cheers!

aphesia · February 24, 2010

rly rly usefull for my project at school. Now i wonder: can i make the graph draw faster?

i got 80.000 measurepoints each second on a grid like 100x30.. that would take ages until the diagram is finished :mellow:

thanks

joseLB · December 4, 2010

Hi Andy, good to see these improvements over your basic udf.

Great Job again and thanks for th reference!!!! By the way, they are EXTREMLY faster and flicker free!!!

I suggest everyone to move from the old ones to this one, it takes almost no time.... I think you can mention this on your original udf...

Well, what about a new routine that allows to put labels somewhere in graphics, something like:

Func _GraphGDIPlus_Plot_Label(ByRef $aGraphArray, $iX, $iY, $text, ?$font?, ?size?)

Thanks

Jose

kiffab · August 26, 2012

Hi

Been using this to create a graph from a database I have.

Is it possible to set the colour of the X and Y axis TEXT? i.e. the values on X and Y axis

cheers

ValeryVal · September 6, 2012

Is it possible to set the colour of the X and Y axis TEXT? i.e. the values on X and Y axis

Yes. It's possible. See sample (function _ReSetTicksColor($Color)):

#include "GraphGDIPlus.au3"
#include <WindowsConstants.au3>
Global $Graph
Opt("GUIOnEventMode", 1)
$GUI = GUICreate("",600,600, -1, -1, $WS_POPUPWINDOW, BitOR($WS_EX_APPWINDOW, $WS_EX_TOPMOST))
GUISetOnEvent(-3,"_Exit")
GUISetState()
;----- Create Graph area -----
$Graph = _GraphGDIPlus_Create($GUI,40,30,530,520,0xFF000000,0xFF88B3DD)
;----- Set Text Color -----
_GraphGDIPlus_Set_TextColor($Graph, 0x00DDAA)
;----- Set X axis range from -5 to 5 -----
_GraphGDIPlus_Set_RangeX($Graph,-5,5,10,1,1)
_GraphGDIPlus_Set_RangeY($Graph,-5,5,10,1,1)
;----- Set Y axis range from -5 to 5 -----
_GraphGDIPlus_Set_GridX($Graph,1,0xFF9369BE)
_GraphGDIPlus_Set_GridY($Graph,1,0xFF9369BE)
_ReSetTicksColor(0x00FF00)
;----- Draw the graph -----
_Draw_Graph()
While 1
    Sleep(100)
WEnd
Func _Draw_Graph()
    ;----- Set line color and size -----
    _GraphGDIPlus_Set_PenColor($Graph,0xFF325D87)
    _GraphGDIPlus_Set_PenSize($Graph,2)
    ;----- draw lines -----
    $First = True
    For $i = -5 to 5 Step 0.005
        $y = _GammaFunction($i)
        If $First = True Then _GraphGDIPlus_Plot_Start($Graph,$i,$y)
        $First = False
        _GraphGDIPlus_Plot_Line($Graph,$i,$y)
        _GraphGDIPlus_Refresh($Graph)
    Next
EndFunc
Func _GammaFunction($iZ)
    $nProduct = ((2^$iZ) / (1 + $iZ))
    For $n = 2 to 1000
        $nProduct *= ((1 + (1/$n))^$iZ) / (1 + ($iZ / $n))
    Next
    Return (1/$iZ) * $nProduct
EndFunc
Func _Exit()
    ;----- close down GDI+ and clear graphic -----
    _GraphGDIPlus_Delete($GUI,$Graph)
    Exit
EndFunc

Func _ReSetTicksColor($Color)
local $ahTicksX, $ahTicksLabelsX
local $ahTicksY, $ahTicksLabelsY
;----- Reset TicksX color -----
$ahTicksX = $Graph[10]
For $i = 1 To (UBound($ahTicksX) - 1)
  GUICtrlSetColor($ahTicksX[$i], $Color)
Next
;----- Reset TicksLabelsX color -----
$ahTicksLabelsX = $Graph[11]
For $i = 1 To (UBound($ahTicksLabelsX) - 1)
  GUICtrlSetColor($ahTicksLabelsX[$i], $Color)
Next
;----- Reset TicksY color -----
$ahTicksY = $Graph[12]
For $i = 1 To (UBound($ahTicksY) - 1)
  GUICtrlSetColor($ahTicksY[$i], $Color)
Next
;----- Reset TicksLabelsY color -----
$ahTicksLabelsY = $Graph[13]
For $i = 1 To (UBound($ahTicksLabelsY) - 1)
  GUICtrlSetColor($ahTicksLabelsY[$i], $Color)
Next
EndFunc

bobmcrae · December 16, 2012

anybiochem,

Congratulations on an excellent contribution to the AutoIT community. I have used this UDF for some graphing and it worked very well. I found the need to implement labels on a created graph. After a bit of work, I was able to get labels to display in the proper location and, generally, orientation. However, as the window is re-drawn (due to move, re-size, or losing focus) the labels in the graph area become occluded. You will see from the function I added to your UDF, I am not handling moves or re-sizes. While I have attempted to follow the UDF and realize that I probably need to add these new labels to the $aGraphArray, but unsure how to do that and whether that is even possible.

Could you advise?

Func _GraphGDIPlus_CreateLabel($hGUI,$text,$xPos,$yPos,$fontStyle=0x0000,$fontSize=14)
     $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hGUI)
     _GDIPlus_GraphicsDrawString($hGraphic, $text, $xPos, $yPos,'Arial',$fontSize,$fontStyle)
EndFunc

Edited December 16, 2012 by bobmcrae

UEZ · December 16, 2012

@bobmcrae: andybiochem is offline now for more than 1 year.

To your question: writing it to the graphic handle directly will not solve your issue. Use the backbuffer ($backbuffer) instead.

Br,

UEZ

bobmcrae · December 16, 2012

Thanks for the super-fast reply & suggestion UEZ. I tried using $backbuffer, but that did not work (label did not display). I will troubleshoot some more with this suggestion though.

$Graph = _GraphGDIPlus_Create($GUI,.08*$xSize,.06*$ySize,.9*$xSize,.8*$ySize,0xFF000000,0xFF88B3DD)
...
_GraphGDIPlus_CreateLabel($Graph[17],'BFI: ' & getBFI($testFile),.93*$xSize,.25*$ySize,$RIGHT)

UEZ · December 16, 2012

Test this:

Modified GraphGDIPlus.au3 (changed some functions from int to float to be more precise and changed save function):

;#AutoIt3Wrapper_Au3Check_Parameters=-d -w 1 -w 2 -w 3 -w 4 -w 5 -w 6

; #INDEX# ===============================================================================
; Title .........: GraphGDIPlus
; AutoIt Version: 3.3.0.0+
; Language: English
; Description ...: A Graph control to draw line graphs, using GDI+, also double-buffered.
; Notes .........:
; =======================================================================================



; #VARIABLES/INCLUDES# ==================================================================
#include-once
#include <GDIplus.au3>

Global $aGraphGDIPlusaGraphArrayINTERNAL[1]
; =======================================================================================



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Create
; Description ...: Creates graph area, and prepares array of specified data
; Syntax.........: _GraphGDIPlus_Create($hWnd,$iLeft,$iTop,$iWidth,$iHeight,$hColorBorder = 0xFF000000,$hColorFill = 0xFFFFFFFF)
; Parameters ....:  $hWnd - Handle to GUI
;                   $iLeft - left most position in GUI
; $iTop - top most position in GUI
; $iWidth - width of graph in pixels
; $iHeight - height of graph in pixels
;                $hColorBorder - Color of graph border (ARGB)
;                $hColorFill - Color of background (ARGB)
; Return values .: Returns array containing variables for subsequent functions...
; Returned Graph array is:
; [1] graphic control handle
; [2] left
; [3] top
; [4] width
; [5] height
; [6] x low
; [7] x high
; [8] y low
; [9] y high
; [10] x ticks handles
; [11] x labels handles
; [12] y ticks handles
; [13] y labels handles
;                    [14] Border Color
;                    [15] Fill Color
;                    [16] Bitmap Handle
;                    [17] Backbuffer Handle
;                    [18] Last used x pos
;                    [19] Last used y pos
;                    [20] Pen (main) Handle
;                    [21] Brush (fill) Handle
;                    [22] Pen (border) Handle
;                    [23] Pen (grid) Handle
; =======================================================================================
Func _GraphGDIPlus_Create($hWnd, $iLeft, $iTop, $iWidth, $iHeight, $hColorBorder = 0xFF000000, $hColorFill = 0xFFFFFFFF, $iSmooth = 2)
    Local $graphics, $bitmap, $backbuffer, $brush, $bpen, $gpen, $pen
    Local $ahTicksLabelsX[1]
    Local $ahTicksLabelsY[1]
    Local $ahTicksX[1]
    Local $ahTicksY[1]
    Local $aGraphArray[1]

    ;----- Set GUI transparency to SOLID (prevents GDI+ glitches) -----
    ;WinSetTrans($hWnd, "", 255) - causes problems when more than 2 graphs used
    ;----- GDI+ Initiate -----
    _GDIPlus_Startup()
    $graphics = _GDIPlus_GraphicsCreateFromHWND($hWnd) ;graphics area
    $bitmap = _GDIPlus_BitmapCreateFromGraphics($iWidth + 1, $iHeight + 1, $graphics);buffer bitmap
    $backbuffer = _GDIPlus_ImageGetGraphicsContext($bitmap) ;buffer area
    _GDIPlus_GraphicsSetSmoothingMode($backbuffer, $iSmooth)

    ;----- Set background Color -----
    $brush = _GDIPlus_BrushCreateSolid($hColorFill)
    _GDIPlus_GraphicsFillRect($backbuffer, 0, 0, $iWidth, $iHeight, $brush)
    ;----- Set border Pen + color -----
    $bpen = _GDIPlus_PenCreate($hColorBorder)
    _GDIPlus_PenSetEndCap($bpen, $GDIP_LINECAPROUND)
    ;----- Set Grid Pen + color -----
    $gpen = _GDIPlus_PenCreate(0xFFf0f0f0)
    _GDIPlus_PenSetEndCap($gpen, $GDIP_LINECAPROUND)
    ;----- set Drawing Pen + Color -----
    $pen = _GDIPlus_PenCreate() ;drawing pen initially black, user to set
    _GDIPlus_PenSetEndCap($pen, $GDIP_LINECAPROUND)
    _GDIPlus_GraphicsDrawRect($backbuffer, 0, 0, $iWidth, $iHeight, $pen)
    ;----- draw -----
    _GDIPlus_GraphicsDrawImageRect($graphics, $bitmap, $iLeft, $iTop, $iWidth + 1, $iHeight + 1)
    ;----- register redraw -----
    GUIRegisterMsg(0x0006, "_GraphGDIPlus_ReDraw") ;0x0006 = win activate
    GUIRegisterMsg(0x0003, "_GraphGDIPlus_ReDraw") ;0x0003 = win move
    ;----- prep + load array -----
    Dim $aGraphArray[24] = ["", $graphics, $iLeft, $iTop, $iWidth, $iHeight, 0, 1, 0, 1, _
            $ahTicksX, $ahTicksLabelsX, $ahTicksY, $ahTicksLabelsY, $hColorBorder, $hColorFill, _
            $bitmap, $backbuffer, 0, 0, $pen, $brush, $bpen, $gpen]
    ;----- prep re-draw array for all graphs created -----
    ReDim $aGraphGDIPlusaGraphArrayINTERNAL[UBound($aGraphGDIPlusaGraphArrayINTERNAL) + 1]
    $aGraphGDIPlusaGraphArrayINTERNAL[UBound($aGraphGDIPlusaGraphArrayINTERNAL) - 1] = $aGraphArray

    Return $aGraphArray
EndFunc ;==>_GraphGDIPlus_Create
Func _GraphGDIPlus_ReDraw($hWnd)
    ;----- Allows redraw of the GDI+ Image upon window min/maximize -----
    Local $i
    _WinAPI_RedrawWindow($hWnd, 0, 0, 0x0100)
    For $i = 1 To UBound($aGraphGDIPlusaGraphArrayINTERNAL) - 1
        If $aGraphGDIPlusaGraphArrayINTERNAL[$i] = 0 Then ContinueLoop
        _GraphGDIPlus_Refresh($aGraphGDIPlusaGraphArrayINTERNAL[$i])
    Next
EndFunc ;==>_GraphGDIPlus_ReDraw



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Delete
; Description ...: Deletes previously created graph and related ticks/labels
; Syntax.........: _GraphGDIPlus_Delete($hWnd,ByRef $aGraphArray)
; Parameters ....:  $hWnd - GUI handle
;                   $aGraphArray - the array returned from _GraphGDIPlus_Create
;                   $iKeepGDIPlus - if not zero, function will not _GDIPlus_Shutdown()
; =======================================================================================
Func _GraphGDIPlus_Delete($hWnd, ByRef $aGraphArray, $iKeepGDIPlus = 0)
    If IsArray($aGraphArray) = 0 Then Return
    Local $ahTicksX, $ahTicksLabelsX, $ahTicksY, $ahTicksLabelsY, $i, $aTemp
    ;----- delete x ticks/labels -----
    $ahTicksX = $aGraphArray[10]
    $ahTicksLabelsX = $aGraphArray[11]
    For $i = 1 To (UBound($ahTicksX) - 1)
        GUICtrlDelete($ahTicksX[$i])
    Next
    For $i = 1 To (UBound($ahTicksLabelsX) - 1)
        GUICtrlDelete($ahTicksLabelsX[$i])
    Next
    ;----- delete y ticks/labels -----
    $ahTicksY = $aGraphArray[12]
    $ahTicksLabelsY = $aGraphArray[13]
    For $i = 1 To (UBound($ahTicksY) - 1)
        GUICtrlDelete($ahTicksY[$i])
    Next
    For $i = 1 To (UBound($ahTicksLabelsY) - 1)
        GUICtrlDelete($ahTicksLabelsY[$i])
    Next
    ;----- delete graphic control -----
    _GDIPlus_GraphicsDispose($aGraphArray[17])
    _GDIPlus_BitmapDispose($aGraphArray[16])
    _GDIPlus_GraphicsDispose($aGraphArray[1])
    _GDIPlus_BrushDispose($aGraphArray[21])
    _GDIPlus_PenDispose($aGraphArray[20])
    _GDIPlus_PenDispose($aGraphArray[22])
    _GDIPlus_PenDispose($aGraphArray[23])
    If $iKeepGDIPlus = 0 Then _GDIPlus_Shutdown()
    _WinAPI_InvalidateRect($hWnd)
    ;----- remove form global redraw array -----
    For $i = 1 To UBound($aGraphGDIPlusaGraphArrayINTERNAL) - 1
        $aTemp = $aGraphGDIPlusaGraphArrayINTERNAL[$i]
        If IsArray($aTemp) = 0 Then ContinueLoop
        If $aTemp[1] = $aGraphArray[1] Then $aGraphGDIPlusaGraphArrayINTERNAL[$i] = 0
    Next
    ;----- close array -----
    $aGraphArray = 0
EndFunc ;==>_GraphGDIPlus_Delete



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Clear
; Description ...: Clears graph content
; Syntax.........: _GraphGDIPlus_Clear(ByRef $aGraphArray)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; =======================================================================================
Func _GraphGDIPlus_Clear(ByRef $aGraphArray)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- Set background Color -----
    _GDIPlus_GraphicsFillRect($aGraphArray[17], 0, 0, $aGraphArray[4], $aGraphArray[5], $aGraphArray[21])
    ;----- set border + Color -----
    _GraphGDIPlus_RedrawRect($aGraphArray)
EndFunc ;==>_GraphGDIPlus_Clear



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Refresh
; Description ...: refreshes the graphic
; Syntax.........: _GraphGDIPlus_Refresh(ByRef $aGraphArray)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; ========================================================================================
Func _GraphGDIPlus_Refresh(ByRef $aGraphArray)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- draw -----
    _GDIPlus_GraphicsDrawImageRect($aGraphArray[1], $aGraphArray[16], $aGraphArray[2], _
            $aGraphArray[3], $aGraphArray[4] + 1, $aGraphArray[5] + 1)
EndFunc ;==>_GraphGDIPlus_Refresh



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Set_RangeX
; Description ...: Allows user to set the range of the X axis and set ticks and rounding levels
; Syntax.........: _GraphGDIPlus_Set_RangeX(ByRef $aGraphArray,$iLow,$iHigh,$iXTicks = 1,$bLabels = 1,$iRound = 0)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; $iLow - the lowest value for the X axis (can be negative)
; $iHigh - the highest value for the X axis
; $iXTicks - [optional] number of ticks to show below axis, if = 0 then no ticks created
; $bLabels - [optional] 1=show labels, any other number=do not show labels
; $iRound - [optional] rounding level of label values
; =======================================================================================
Func _GraphGDIPlus_Set_RangeX(ByRef $aGraphArray, $iLow, $iHigh, $iXTicks = 1, $bLabels = 1, $iRound = 0)
    If IsArray($aGraphArray) = 0 Then Return
    Local $ahTicksX, $ahTicksLabelsX, $i
    ;----- load user vars to array -----
    $aGraphArray[6] = $iLow
    $aGraphArray[7] = $iHigh
    ;----- prepare nested array -----
    $ahTicksX = $aGraphArray[10]
    $ahTicksLabelsX = $aGraphArray[11]
    ;----- delete any existing ticks -----
    For $i = 1 To (UBound($ahTicksX) - 1)
        GUICtrlDelete($ahTicksX[$i])
    Next
    Dim $ahTicksX[1]
    ;----- create new ticks -----
    For $i = 1 To $iXTicks + 1
        ReDim $ahTicksX[$i + 1]
        $ahTicksX[$i] = GUICtrlCreateLabel("", (($i - 1) * ($aGraphArray[4] / $iXTicks)) + $aGraphArray[2], _
                $aGraphArray[3] + $aGraphArray[5], 1, 5)
        GUICtrlSetBkColor(-1, 0x000000)
        GUICtrlSetState(-1, 128)
    Next
    ;----- delete any existing labels -----
    For $i = 1 To (UBound($ahTicksLabelsX) - 1)
        GUICtrlDelete($ahTicksLabelsX[$i])
    Next
    Dim $ahTicksLabelsX[1]
    ;----- create new labels -----
    For $i = 1 To $iXTicks + 1
        ReDim $ahTicksLabelsX[$i + 1]
        $ahTicksLabelsX[$i] = GUICtrlCreateLabel("", _
                ($aGraphArray[2] + (($aGraphArray[4] / $iXTicks) * ($i - 1))) - (($aGraphArray[4] / $iXTicks) / 2), _
                $aGraphArray[3] + $aGraphArray[5] + 10, $aGraphArray[4] / $iXTicks, 13, 1)
        GUICtrlSetBkColor(-1, -2)
    Next
    ;----- if labels are required, then fill -----
    If $bLabels = 1 Then
        For $i = 1 To (UBound($ahTicksLabelsX) - 1)
            GUICtrlSetData($ahTicksLabelsX[$i], _
                    StringFormat("%." & $iRound & "f", _GraphGDIPlus_Reference_Pixel("p", (($i - 1) * ($aGraphArray[4] / $iXTicks)), _
                    $aGraphArray[6], $aGraphArray[7], $aGraphArray[4])))
        Next
    EndIf
    ;----- load created arrays back into array -----
    $aGraphArray[10] = $ahTicksX
    $aGraphArray[11] = $ahTicksLabelsX
EndFunc ;==>_GraphGDIPlus_Set_RangeX



; #FUNCTION# ============================================================================
; Name...........: _GraphGDIPlus_Set_RangeY
; Description ...: Allows user to set the range of the Y axis and set ticks and rounding levels
; Syntax.........: _GraphGDIPlus_SetRange_Y(ByRef $aGraphArray,$iLow,$iHigh,$iYTicks = 1,$bLabels = 1,$iRound = 0)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; $iLow - the lowest value for the Y axis (can be negative)
; $iHigh - the highest value for the Y axis
; $iYTicks - [optional] number of ticks to show next to axis, if = 0 then no ticks created
; $bLabels - [optional] 1=show labels, any other number=do not show labels
; $iRound - [optional] rounding level of label values
; =======================================================================================
Func _GraphGDIPlus_Set_RangeY(ByRef $aGraphArray, $iLow, $iHigh, $iYTicks = 1, $bLabels = 1, $iRound = 0)
    If IsArray($aGraphArray) = 0 Then Return
    Local $ahTicksY, $ahTicksLabelsY, $i
    ;----- load user vars to array -----
    $aGraphArray[8] = $iLow
    $aGraphArray[9] = $iHigh
    ;----- prepare nested array -----
    $ahTicksY = $aGraphArray[12]
    $ahTicksLabelsY = $aGraphArray[13]
    ;----- delete any existing ticks -----
    For $i = 1 To (UBound($ahTicksY) - 1)
        GUICtrlDelete($ahTicksY[$i])
    Next
    Dim $ahTicksY[1]
    ;----- create new ticks -----
    For $i = 1 To $iYTicks + 1
        ReDim $ahTicksY[$i + 1]
        $ahTicksY[$i] = GUICtrlCreateLabel("", $aGraphArray[2] - 5, _
                ($aGraphArray[3] + $aGraphArray[5]) - (($aGraphArray[5] / $iYTicks) * ($i - 1)), 5, 1)
        GUICtrlSetBkColor(-1, 0x000000)
        GUICtrlSetState(-1, 128)
    Next
    ;----- delete any existing labels -----
    For $i = 1 To (UBound($ahTicksLabelsY) - 1)
        GUICtrlDelete($ahTicksLabelsY[$i])
    Next
    Dim $ahTicksLabelsY[1]
    ;----- create new labels -----
    For $i = 1 To $iYTicks + 1
        ReDim $ahTicksLabelsY[$i + 1]
        $ahTicksLabelsY[$i] = GUICtrlCreateLabel("", $aGraphArray[2] - 40, _
                ($aGraphArray[3] + $aGraphArray[5]) - (($aGraphArray[5] / $iYTicks) * ($i - 1)) - 6, 30, 13, 2)
        GUICtrlSetBkColor(-1, -2)
    Next
    ;----- if labels are required, then fill -----
    If $bLabels = 1 Then
        For $i = 1 To (UBound($ahTicksLabelsY) - 1)
            GUICtrlSetData($ahTicksLabelsY[$i], StringFormat("%." & $iRound & "f", _GraphGDIPlus_Reference_Pixel("p", _
                    (($i - 1) * ($aGraphArray[5] / $iYTicks)), $aGraphArray[8], $aGraphArray[9], $aGraphArray[5])))
        Next
    EndIf
    ;----- load created arrays back into array -----
    $aGraphArray[12] = $ahTicksY
    $aGraphArray[13] = $ahTicksLabelsY
EndFunc ;==>_GraphGDIPlus_Set_RangeY



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Start
; Description ...: Move starting point of plot
; Syntax.........: _GraphGDIPlus_Plot_Start(ByRef $aGraphArray,$iX,$iY)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; $iX - x value to start at
; $iY - y value to start at
; ========================================================================================
Func _GraphGDIPlus_Plot_Start(ByRef $aGraphArray, $iX, $iY)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- MOVE pen to start point -----
    $aGraphArray[18] = _GraphGDIPlus_Reference_Pixel("x", $iX, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4])
    $aGraphArray[19] = _GraphGDIPlus_Reference_Pixel("y", $iY, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5])
EndFunc ;==>_GraphGDIPlus_Plot_Start



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Line
; Description ...: draws straight line to x,y from previous point / starting point
; Syntax.........: _GraphGDIPlus_Plot_Line(ByRef $aGraphArray,$iX,$iY)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; $iX - x value to draw to
; $iY - y value to draw to
; ========================================================================================
Func _GraphGDIPlus_Plot_Line(ByRef $aGraphArray, $iX, $iY)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- Draw line from previous point to new point -----
    $iX = _GraphGDIPlus_Reference_Pixel("x", $iX, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4])
    $iY = _GraphGDIPlus_Reference_Pixel("y", $iY, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5])
;~  _GDIPlus_GraphicsDrawLine($aGraphArray[17], $aGraphArray[18], $aGraphArray[19], $iX, $iY, $aGraphArray[20])
    DllCall($ghGDIPDll, "int", "GdipDrawLine", "handle", $aGraphArray[17], "handle", $aGraphArray[20], "float", $aGraphArray[18], "float", $aGraphArray[19], "float", $iX, "float", $iY)
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- save current as last coords -----
    $aGraphArray[18] = $iX
    $aGraphArray[19] = $iY
EndFunc ;==>_GraphGDIPlus_Plot_Line



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Point
; Description ...: draws point at coords
; Syntax.........: _GraphGDIPlus_Plot_Point(ByRef $aGraphArray,$iX,$iY)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; $iX - x value to draw at
; $iY - y value to draw at
; ========================================================================================
Func _GraphGDIPlus_Plot_Point(ByRef $aGraphArray, $iX, $iY)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- Draw point from previous point to new point -----
    $iX = _GraphGDIPlus_Reference_Pixel("x", $iX, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4])
    $iY = _GraphGDIPlus_Reference_Pixel("y", $iY, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5])
;~  _GDIPlus_GraphicsDrawRect($aGraphArray[17], $iX-1, $iY-1, 2, 2, $aGraphArray[20])
    DllCall($ghGDIPDll, "int", "GdipDrawRectangle", "handle", $aGraphArray[17], "handle", $aGraphArray[20], "float", $iX-1, "float", $iY-1,"float", 2, "float", 2)
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- save current as last coords -----
    $aGraphArray[18] = $iX
    $aGraphArray[19] = $iY
EndFunc ;==>_GraphGDIPlus_Plot_Point



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Plot_Dot
; Description ...: draws single pixel dot at coords
; Syntax.........: _GraphGDIPlus_Plot_Dot(ByRef $aGraphArray,$iX,$iY)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; $iX - x value to draw at
; $iY - y value to draw at
; ========================================================================================
Func _GraphGDIPlus_Plot_Dot(ByRef $aGraphArray, $iX, $iY)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- Draw point from previous point to new point -----
    $iX = _GraphGDIPlus_Reference_Pixel("x", $iX, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4])
    $iY = _GraphGDIPlus_Reference_Pixel("y", $iY, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5])
;~  _GDIPlus_GraphicsDrawRect($aGraphArray[17], $iX, $iY, 1, 1, $aGraphArray[20]) ;draws 2x2 dot ?HOW to get 1x1 pixel?????
    DllCall($ghGDIPDll, "int", "GdipDrawRectangle", "handle", $aGraphArray[17], "handle", $aGraphArray[20], "float", $iX, "float", $iY,"float", 1, "float", 1)
    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- save current as last coords -----
    $aGraphArray[18] = $iX
    $aGraphArray[19] = $iY
EndFunc ;==>_GraphGDIPlus_Plot_Dot



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_PenColor
; Description ...: sets the Color for the next drawing
; Syntax.........: _GraphGDIPlus_Set_PenColor(ByRef $aGraphArray,$hColor,$hBkGrdColor = $GUI_GR_NOBKColor)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; $hColor - the Color of the next item (ARGB)
; ========================================================================================
Func _GraphGDIPlus_Set_PenColor(ByRef $aGraphArray, $hColor)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- apply pen Color -----
    _GDIPlus_PenSetColor($aGraphArray[20], $hColor)
EndFunc ;==>_GraphGDIPlus_Set_PenColor



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_PenSize
; Description ...: sets the pen for the next drawing
; Syntax.........: _GraphGDIPlus_Set_PenSize(ByRef $aGraphArray,$iSize = 1)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; $iSize - size of pen line
; ========================================================================================
Func _GraphGDIPlus_Set_PenSize(ByRef $aGraphArray, $iSize = 1)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- apply pen size -----
    _GDIPlus_PenSetWidth($aGraphArray[20], $iSize)
EndFunc ;==>_GraphGDIPlus_Set_PenSize



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_PenDash
; Description ...: sets the pen dash style for the next drawing
; Syntax.........: GraphGDIPlus_Set_PenDash(ByRef $aGraphArray,$iDash = 0)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; $iDash - style of dash, where:
;                                       0 = solid line
;                                       1 = simple dashed line
;                                       2 = simple dotted line
;                                       3 = dash dot line
;                                       4 = dash dot dot line
; ========================================================================================
Func _GraphGDIPlus_Set_PenDash(ByRef $aGraphArray, $iDash = 0)
    If IsArray($aGraphArray) = 0 Then Return
    Local $Style
    Switch $iDash
        Case 0 ;solid line _____
            $Style = $GDIP_DASHSTYLESOLID
        Case 1 ;simple dash -----
            $Style = $GDIP_DASHSTYLEDASH
        Case 2 ;simple dotted .....
            $Style = $GDIP_DASHSTYLEDOT
        Case 3 ;dash dot -.-.-
            $Style = $GDIP_DASHSTYLEDASHDOT
        Case 4 ;dash dot dot -..-..-..
            $Style = $GDIP_DASHSTYLEDASHDOTDOT
    EndSwitch
    ;----- apply pen dash -----
    _GDIPlus_PenSetDashStyle($aGraphArray[20], $Style)
EndFunc ;==>_GraphGDIPlus_Set_PenDash



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_GridX
; Description ...: Adds X gridlines.
; Syntax.........: _GraphGDIPlus_Set_GridX(ByRef $aGraphArray, $Ticks=1, $hColor=0xf0f0f0)
; Parameters ....:  $aGraphArray - the array returned from _GraphGDIPlus_Create
;                   $Ticks - sets line at every nth unit assigned to axis
;               $hColor - [optional] RGB value, defining Color of grid. Default is a light gray
;                   $hColorY0 - [optional] RGB value, defining Color of Y=0 line, Default black
; =======================================================================================
Func _GraphGDIPlus_Set_GridX(ByRef $aGraphArray, $Ticks = 1, $hColor = 0xFFf0f0f0, $hColorY0 = 0xFF000000)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- Set gpen to user color -----
    _GDIPlus_PenSetColor($aGraphArray[23], $hColor)
    ;----- draw grid lines -----
    Select
        Case $Ticks > 0
            For $i = $aGraphArray[6] To $aGraphArray[7] Step $Ticks
                If $i = Number($aGraphArray[6]) Or $i = Number($aGraphArray[7]) Then ContinueLoop
                _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
                        _GraphGDIPlus_Reference_Pixel("x", $i, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4]), _
                        1, _
                        _GraphGDIPlus_Reference_Pixel("x", $i, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4]), _
                        $aGraphArray[5] - 1, _
                        $aGraphArray[23])
            Next
    EndSelect
    ;----- draw y=0 -----
    _GDIPlus_PenSetColor($aGraphArray[23], $hColorY0)
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
            _GraphGDIPlus_Reference_Pixel("x", 0, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4]), _
            1, _
            _GraphGDIPlus_Reference_Pixel("x", 0, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4]), _
            $aGraphArray[5] - 1, _
            $aGraphArray[23])
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
            1, _
            _GraphGDIPlus_Reference_Pixel("y", 0, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5]), _
            $aGraphArray[4] - 1, _
            _GraphGDIPlus_Reference_Pixel("y", 0, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5]), _
            $aGraphArray[23])

    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- re-set to user specs -----
    _GDIPlus_PenSetColor($aGraphArray[23], $hColor) ;set Color back to user def
EndFunc ;==>_GraphGDIPlus_Set_GridX



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Set_GridY
; Description ...: Adds Y gridlines.
; Syntax.........: _GraphGDIPlus_Set_GridY(ByRef $aGraphArray, $Ticks=1, $hColor=0xf0f0f0)
; Parameters ....:  $aGraphArray - the array returned from _GraphGDIPlus_Create
;                   $Ticks - sets line at every nth unit assigned to axis
;               $hColor - [optional] RGB value, defining Color of grid. Default is a light gray
;                   $hColorX0 - [optional] RGB value, defining Color of X=0 line, Default black
; =======================================================================================
Func _GraphGDIPlus_Set_GridY(ByRef $aGraphArray, $Ticks = 1, $hColor = 0xFFf0f0f0, $hColorX0 = 0xFF000000)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- Set gpen to user color -----
    _GDIPlus_PenSetColor($aGraphArray[23], $hColor)
    ;----- draw grid lines -----
    Select
        Case $Ticks > 0
            For $i = $aGraphArray[8] To $aGraphArray[9] Step $Ticks
                If $i = Number($aGraphArray[8]) Or $i = Number($aGraphArray[9]) Then ContinueLoop
                _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
                        1, _
                        _GraphGDIPlus_Reference_Pixel("y", $i, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5]), _
                        $aGraphArray[4] - 1, _
                        _GraphGDIPlus_Reference_Pixel("y", $i, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5]), _
                        $aGraphArray[23])
            Next
    EndSelect
    ;----- draw abcissa/ordinate -----
    _GDIPlus_PenSetColor($aGraphArray[23], $hColorX0)
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
            _GraphGDIPlus_Reference_Pixel("x", 0, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4]), _
            1, _
            _GraphGDIPlus_Reference_Pixel("x", 0, $aGraphArray[6], $aGraphArray[7], $aGraphArray[4]), _
            $aGraphArray[5] - 1, _
            $aGraphArray[23])
    _GDIPlus_GraphicsDrawLine($aGraphArray[17], _
            1, _
            _GraphGDIPlus_Reference_Pixel("y", 0, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5]), _
            $aGraphArray[4] - 1, _
            _GraphGDIPlus_Reference_Pixel("y", 0, $aGraphArray[8], $aGraphArray[9], $aGraphArray[5]), _
            $aGraphArray[23])

    _GraphGDIPlus_RedrawRect($aGraphArray)
    ;----- re-set to user specs -----
    _GDIPlus_PenSetColor($aGraphArray[23], $hColor) ;set Color back to user def
EndFunc ;==>_GraphGDIPlus_Set_GridY



; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_RedrawRect
; Description ...: INTERNAL FUNCTION - Re-draws the border
; Syntax.........: _GraphGDIPlus_RedrawRect(ByRef $aGraphArray)
; Parameters ....: $aGraphArray - the array returned from _GraphGDIPlus_Create
; Notes..........: This prevents drawing over the border of the graph area
; =========================================================================================
Func _GraphGDIPlus_RedrawRect(ByRef $aGraphArray)
    If IsArray($aGraphArray) = 0 Then Return
    ;----- draw border -----
    _GDIPlus_GraphicsDrawRect($aGraphArray[17], 0, 0, $aGraphArray[4], $aGraphArray[5], $aGraphArray[22]) ;draw border
EndFunc ;==>_GraphGDIPlus_RedrawRect


; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_Reference_Pixel
; Description ...: INTERNAL FUNCTION - performs pixel reference calculations
; Syntax.........: _GraphGDIPlus_Reference_Pixel($iType,$iValue,$iLow,$iHigh,$iTotalPixels)
; Parameters ....: $iType - "x"=x axis pix, "y" = y axis pix, "p"=value from pixels
; $iValue - pixels reference or value
; $iLow - lower limit of axis
; $iHigh - upper limit of axis
; $iTotalPixels - total number of pixels in range (either width or height)
; =========================================================================================
Func _GraphGDIPlus_Reference_Pixel($iType, $iValue, $iLow, $iHigh, $iTotalPixels)
    ;----- perform pixel reference calculations -----
    Switch $iType
        Case "x"
            Return (($iTotalPixels / ($iHigh - $iLow)) * (($iHigh - $iLow) * (($iValue - $iLow) / ($iHigh - $iLow))))
        Case "y"
            Return ($iTotalPixels - (($iTotalPixels / ($iHigh - $iLow)) * (($iHigh - $iLow) * (($iValue - $iLow) / ($iHigh - $iLow)))))
        Case "p"
            Return ($iValue / ($iTotalPixels / ($iHigh - $iLow))) + $iLow
    EndSwitch
EndFunc ;==>_GraphGDIPlus_Reference_Pixel

; #FUNCTION# =============================================================================
; Name...........: _GraphGDIPlus_SaveImage
; Description ...: INTERNAL FUNCTION - save drawn image to file
; Syntax.........: _GraphGDIPlus_SaveImage($aGraphArray, $file)
; Parameters ....: ByRef $aGraphArray - the array returned from _GraphGDIPlus_Create
;                               $file - filename
; Autor .........: UEZ
; =========================================================================================
Func _GraphGDIPlus_SaveImage(ByRef $aGraphArray, $file)
    If IsArray($aGraphArray) = 0 Then Return
    _GDIPlus_ImageSaveToFile($aGraphArray[16], $file)
    If @error Then Return SetError(1, 0, 0)
    Return 1
EndFunc ;==>_GraphGDIPlus_SaveImage

Func _GraphGDIPlus_DrawText(ByRef $aGraphArray, $sString, $iX, $iY, $iBrushColor = 0xFF000000, $sFont = "Arial", $iFontSize = 12, $iStyle = 0)
    If IsArray($aGraphArray) = 0 Then Return
    Local $hBrush = _GDIPlus_BrushCreateSolid($iBrushColor)
    Local $hFormat = _GDIPlus_StringFormatCreate()
Local $hFamily = _GDIPlus_FontFamilyCreate($sFont)
Local $hFont = _GDIPlus_FontCreate($hFamily, $iFontSize, $iStyle)
    Local $tLayout = _GDIPlus_RectFCreate($iX, $iY, 0, 0)
    _GDIPlus_GraphicsDrawStringEx($aGraphArray[17], $sString, $hFont, $tLayout, $hFormat, $hBrush)
_GDIPlus_FontDispose($hFont)
_GDIPlus_FontFamilyDispose($hFamily)
_GDIPlus_StringFormatDispose($hFormat)
_GDIPlus_BrushDispose($hBrush)
    Return 1
EndFunc ;==>_GraphGDIPlus_DrawText

and add this line

_GraphGDIPlus_DrawText($Graph, "Gamma Function in real time", 0, 0)

to the example code in _Draw_Graph() function

Func _Draw_Graph()
;----- Set line color and size -----
_GraphGDIPlus_Set_PenColor($Graph,0xFF325D87)
_GraphGDIPlus_Set_PenSize($Graph,2)

;----- draw lines -----
$First = True
_GraphGDIPlus_DrawText($Graph, "Gamma Function in real time", 0, 0)
For $i = -5 to 5 Step 0.05
$y = _GammaFunction($i)
If $First = True Then _GraphGDIPlus_Plot_Start($Graph,$i,$y)
$First = False
_GraphGDIPlus_Plot_Line($Graph,$i,$y)
_GraphGDIPlus_Refresh($Graph)
Next
EndFunc

Br,

UEZ

Edited December 17, 2012 by UEZ

bobmcrae · December 17, 2012

UEZ:

Perfect! I also like the fact that the string is associated with the graph object so its position is relative to the graph.

Thanks very much for taking the time to help me with this issue.

AZJIO · December 8, 2013

Examples, 14 pieces, 2.75 KB, Ru

GraphGDIPlus_Example.7z

Edited December 8, 2013 by AZJIO

GraphGDIPlus UDF - Create GDI+ line graphs

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