Custom Scrollbar

PhoenixXL · May 1, 2013

I have already made a regarding the same issue. But its old enough to start the discussion again there.
I wanted to have a custom scrollbar for an edit control. This is the script, it works as required.

CScrollBar

#include-once
#include <GDIP.au3> ;http://www.autoitscript.com/forum/topic/106021-gdipau3/
#include <WinAPIEx.au3>
#include <GuiConstantsEx.au3>
#include <Constants.au3>
#include <WindowsConstants.au3>
#include <ScrollBarConstants.au3>
#include <Misc.au3>
#include <GUIEdit.au3>
#include <Array.au3>

Global $iWidth_VSCROLL = _WinAPI_GetSystemMetrics($SM_CXVSCROLL)
Global $hGraphic, $hGraphicGUI, $hBMPBuff

;Double-Click
Global $iDoubleClickTime = DllCall("user32.dll", "uint", "GetDoubleClickTime")
$iDoubleClickTime = $iDoubleClickTime[0]

;User-Custom Messages
Global $WM_UPDATETHUMB = $WM_APP + 11 ;Called when the height of the thumb has to be changed.
Global $WM_THUMBMOVE = $WM_APP + 12 ;Called when the Thumb has been clicked
Global $WM_ARROWDOWN = $WM_APP + 13 ;Called when the Arrow buttons have been clicked.
Global $WM_PAINTSCROLLBAR = $WM_APP + 14 ;Implements the painting of the scroll bar over the NC area of the EditBox.

Global Const $tagNCCALCSIZE_PARAMS = $tagRECT & ";" & $tagRECT & ";" & $tagRECT & ";ptr PWINDOWPOS"

; Register callback function and obtain handle to _New_WndProc
Global $___hNew_WndProc = DllCallbackRegister("_New_WndProc", "int", "hwnd;uint;wparam;lparam")
; Get pointer to _New_WndProc
Global $___pNew_WndProc = DllCallbackGetPtr($___hNew_WndProc)

Global $___cEdit ; Handle of the Edit
Global $___pOld_WndProc ; Old Window Procedure's Address

_GDIPlus_Startup()

Global $hPen = _GDIPlus_PenCreate(0xAAFCD667, 2), _
        $hBrush = _GDIPlus_BrushCreateSolid(0xAAFCD667), _
        $hFormat = _GDIPlus_StringFormatCreate(), _
        $hFamily = _GDIPlus_FontFamilyCreate("Wingdings"), _
        $hPath = _GDIPlus_PathCreate()

Func Startup_CustomScrollBar($hEdit)


    $___cEdit = $hEdit ;get the handle of the edit
    $___pOld_WndProc = _SubClass($hEdit, $___pNew_WndProc) ;store the old WndProc

    ;post a WM_NCCALCSIZE msg.
    _WinAPI_SetWindowPos($hEdit, Default, Default, Default, Default, Default, $SWP_FRAMECHANGED)

EndFunc   ;==>Startup_CustomScrollBar

Func Shutdown_CustomScrollBar();Mem Release

    ;unsubclass the control
    _SubClass($___cEdit, $___pOld_WndProc)

    ;dispose the resources
    _Gdiplus_PathDispose($hPath)
    _GDIPlus_PenDispose($hPen)
    _GDIPlus_BrushDispose($hBrush)
    _GDIPlus_StringFormatDispose($hFormat)

    _GDIPlus_FontFamilyDispose($hFamily)

    DllCallbackFree($___hNew_WndProc)
EndFunc   ;==>Shutdown_CustomScrollBar

;The path of the Top Arrow button
;This could be rotated to obtain the Bottom Arrow button's path.
Func TopBtn_Path(ByRef $hPath, $iX, $iY, $iSide)
    ;* Not required when the path is in order.
    _GDIPlus_PathStartFigure($hPath) ;*
    _GDIPlus_PathAddLine($hPath, $iX + $iSide, $iY + $iSide, $iX + $iSide, $iY)
    _GDIPlus_PathAddLine($hPath, $iX + $iSide, $iY, $iX, $iY)
    _GDIPlus_PathAddLine($hPath, $iX, $iY, $iX, $iY + $iSide)
    _GDIPlus_PathAddArc($hPath, $iX, $iY + $iSide / 2, $iSide, $iSide, 180, 180)
    _GDIPlus_PathCloseFigure($hPath) ;*
EndFunc   ;==>TopBtn_Path

;The Path of the Thumb
Func ThumbBtn_Path(ByRef $hPath, $iX, $iY, $iHeight, $iSide)

    ;* Not required when the path is in order.
    _GDIPlus_PathStartFigure($hPath) ;*
    _GDIPlus_PathAddLine($hPath, $iX, $iY, $iX, $iY + $iHeight)
    _GDIPlus_PathAddArc($hPath, $iX, $iY + $iHeight - $iSide / 2, $iSide, $iSide, 180, -180)
    _GDIPlus_PathAddLine($hPath, $iX + $iSide, $iY + $iHeight, $iX + $iSide, $iY)
    _GDIPlus_PathAddArc($hPath, $iX, $iY - $iSide / 2, $iSide, $iSide, -180, 180)
    _GDIPlus_PathCloseFigure($hPath) ;*

EndFunc   ;==>ThumbBtn_Path

Func _SubClass($hWnd, $pNew_WindowProc)
    Local $iRes = _WinAPI_SetWindowLong($hWnd, -4, $pNew_WindowProc)
    If @error Then Return SetError(1, 0, 0)
    If $iRes = 0 Then Return SetError(1, 0, 0)
    Return SetError(0, 0, $iRes)
EndFunc   ;==>_SubClass

;The new window procedure of the edit control.
Func _New_WndProc($hWnd, $iMsg, $wParam, $lParam)
    Static $aRegion[3], $i_Thumb_Height = -1, $i_TrackHeight, $iY_Thumb = -1, $iPixel_Per_Line_Scale = 1, $iThumb_Pic = 0, $iTrack_Pic = 0

    Static $hDC, $hGfx

    Switch $iMsg

        Case $WM_NCCALCSIZE

            $tNCCALCSIZE_PARAMS = DllStructCreate($tagNCCALCSIZE_PARAMS, $lParam)

            DllStructSetData($tNCCALCSIZE_PARAMS, 1, DllStructGetData($tNCCALCSIZE_PARAMS, 1) + 2)
            DllStructSetData($tNCCALCSIZE_PARAMS, 2, DllStructGetData($tNCCALCSIZE_PARAMS, 2) + 2)
            DllStructSetData($tNCCALCSIZE_PARAMS, 3, DllStructGetData($tNCCALCSIZE_PARAMS, 3) - 2 - $iWidth_VSCROLL) ;Space for VSCROLL Bar
            DllStructSetData($tNCCALCSIZE_PARAMS, 4, DllStructGetData($tNCCALCSIZE_PARAMS, 4) - 2)

            Return 0

        Case $WM_NCPAINT

            ;the first draw.
            If $i_Thumb_Height = -1 Then _SendMessage($hWnd, $WM_UPDATETHUMB, 0, 0)


        Case $WM_PAINTSCROLLBAR

            $iRet = _WinAPI_CallWindowProc($___pOld_WndProc, $hWnd, $iMsg, _
                    $wParam, $lParam)

            $iWidth = _WinAPI_GetWindowWidth($hWnd) - _WinAPI_GetClientWidth($hWnd) - 4
            $iHeight = _WinAPI_GetClientHeight($hWnd)

            ;Set the Range
            SetInRange($i_Thumb_Height, 15, $i_TrackHeight)
            SetInRange($iY_Thumb, 0, $i_TrackHeight - $i_Thumb_Height)

            $hHbmp = hHbmp_ScrollButtons_And_Track($iWidth, $iHeight, 0xFF000000 + GUICtrlGetBkColor($hWnd, _WinAPI_GetClientWidth($hWnd), $iHeight), $aRegion, _Iif($iY_Thumb < 0, 0, $iY_Thumb), $i_Thumb_Height) ;
            GUICtrlSendMsg($iTrack_Pic, 370, $IMAGE_BITMAP, $hHbmp) ;370 = $STM_SETBITMAP
            _WinAPI_DeleteObject($hHbmp)

            _WinAPI_EmptyWorkingSet()

            Return $iRet

        Case $WM_NCHITTEST

            $tPoint = DllStructCreate($tagPoint)
            DllStructSetData($tPoint, 1, _WinAPI_LoWord($lParam))
            DllStructSetData($tPoint, 2, _WinAPI_HiWord($lParam))
            _WinAPI_ScreenToClient($hWnd, $tPoint)

            $tRect = Return_CLientRect($hWnd)
            If _WinAPI_PtInRect($tRect, $tPoint) Then Return $HTBORDER

        Case $WM_NCLBUTTONDOWN

            $tPoint = _WinAPI_GetMousePos(True, $hWnd)

            If _GDIPlus_RegionIsVisiblePoint($aRegion[0], DllStructGetData($tPoint, 1) - _WinAPI_GetClientWidth($hWnd) - 2, DllStructGetData($tPoint, 2) - 2, $hGfx) Then

                _WinAPI_PostMessage($hWnd, $WM_ARROWDOWN, $SB_LINEUP, 0)

            ElseIf _GDIPlus_RegionIsVisiblePoint($aRegion[1], DllStructGetData($tPoint, 1) - _WinAPI_GetClientWidth($hWnd) - 2, DllStructGetData($tPoint, 2) - 2, $hGfx) Then

                _WinAPI_PostMessage($hWnd, $WM_ARROWDOWN, $SB_LINEDOWN, 1)

            ElseIf _GDIPlus_RegionIsVisiblePoint($aRegion[2], DllStructGetData($tPoint, 1) - _WinAPI_GetClientWidth($hWnd) - 2, DllStructGetData($tPoint, 2) - 2, $hGfx) Then

                _WinAPI_PostMessage($hWnd, $WM_THUMBMOVE, 0, 0)

            Else

                $tRect = Return_CLientRect($hWnd)
                If _WinAPI_PtInRect($tRect, $tPoint) Then

                    $iY_Thumb = DllStructGetData($tPoint, 2) - (($i_Thumb_Height / 2) + ($iWidth_VSCROLL - 2))
                    $iLine_Scroll = Floor(($iY_Thumb / $iPixel_Per_Line_Scale))
                    $iLine_Scroll_Count = $iLine_Scroll - _GUICtrlEdit_GetFirstVisibleLine($hWnd)
                    _SendMessage($hWnd, $EM_LINESCROLl, 0, $iLine_Scroll_Count)
                    _SendMessage($hWnd, $WM_PAINTSCROLLBAR, 0, 0)

                EndIf
            EndIf

        Case $WM_CHAR, $WM_UNDO, $EM_UNDO, $WM_HOTKEY
            _WinAPI_PostMessage($hWnd, $WM_UPDATETHUMB, 0, 0)

        Case $WM_SIZE, $WM_SIZING
            $iRet = _WinAPI_CallWindowProc($___pOld_WndProc, $hWnd, $iMsg, _
                    $wParam, $lParam)
            $aPos = ControlGetPos("", "", $hWnd)

            If $iTrack_Pic Then
                GUICtrlSetPos($iTrack_Pic, $aPos[0] + 2 + _WinAPI_GetClientWidth($hWnd), $aPos[1] + 2, $iWidth_VSCROLL, _WinAPI_GetClientHeight($hWnd))
            Else
                $iTrack_Pic = GUICtrlCreatePic("", $aPos[0] + 2 + _WinAPI_GetClientWidth($hWnd), $aPos[1] + 2, $iWidth_VSCROLL, _WinAPI_GetClientHeight($hWnd))
                GUICtrlSetBkColor(-1, 0)
            EndIf

            _SendMessage($hWnd, $WM_UPDATETHUMB)

            If $hDC Then ;release the old ones
                _GDIPlus_GraphicsDispose($hGfx)
                _WinAPI_ReleaseDC($hDC, $hWnd)
            EndIf

            ;update the new graphics and DC
            $hDC = _WinAPI_GetWindowDC($hWnd)
            $hGfx = _GDIPlus_GraphicsCreateFromHDC($hDC)

            Return $iRet

        Case $WM_KEYDOWN

            Switch $wParam

                Case $VK_DOWN, $VK_UP, $VK_PRIOR, $VK_NEXT ;Down
                    $iRet = _WinAPI_CallWindowProc($___pOld_WndProc, $hWnd, $iMsg, _
                            $wParam, $lParam)
                    _SendMessage($hWnd, $WM_UPDATETHUMB)
                    Return $iRet

                Case $VK_END, $VK_HOME
                    If _IsPressed("11") Then ;CTRL Pressed

                        _SendMessage($hWnd, $WM_VSCROLL, _WinAPI_MakeLong($SB_BOTTOM + $VK_END - $wParam, 0))

                        $iY_Thumb = _Iif($wParam = $VK_END, $i_TrackHeight - $i_Thumb_Height, 0)

                        ;Redraw the window, _Winapi_RedrawWindow didn't work
                        _SendMessage($hWnd, $WM_PAINTSCROLLBAR)

                    EndIf
            EndSwitch

        Case $WM_MOUSEWHEEL

            $iDelta = _WinAPI_HiWord($wParam)
            $iCount = Abs($iDelta) / 120

            For $i = 1 To $iCount

                _SendMessage($hWnd, $WM_ARROWDOWN, _Iif($iDelta > 0, $SB_LINEUP, $SB_LINEDOWN), -$iDelta)

            Next

        Case $WM_UPDATETHUMB

            ;Calculate the required vars
            $i_LineCount = _GUICtrlEdit_GetLineCount($hWnd)
            $i_ScrollBarHeight = _WinAPI_GetClientHeight($hWnd)
            $i_LineHeight = GetLineHeight($hWnd)
            $iMax_LineVisible = Floor($i_ScrollBarHeight / $i_LineHeight)
            $i_PageHeight = $i_LineCount * $i_LineHeight
            $i_TrackHeight = $i_ScrollBarHeight - (2 * ($iWidth_VSCROLL - 2))
            $i_CurLine = _GUICtrlEdit_GetFirstVisibleLine($hWnd)

            ;Set the Thumb size
            $i_Thumb_Height = $i_TrackHeight * ($iMax_LineVisible * $i_LineHeight / $i_PageHeight)


            ;Set the Scale
            $iPixel_Per_Line_Scale = ($i_TrackHeight - $i_Thumb_Height) / ($i_LineCount - $iMax_LineVisible)

            ;Set the Thumb Pos
            $iY_Thumb = (($i_CurLine / ($i_LineCount - $iMax_LineVisible)) * ($i_TrackHeight - $i_Thumb_Height))

            ;Redraw the window, _Winapi_RedrawWindow didn't work
            _SendMessage($hWnd, $WM_PAINTSCROLLBAR, 0, 0)


        Case $WM_THUMBMOVE
            $iLine_InPage = _WinAPI_GetClientHeight($hWnd) / GetLineHeight($hWnd)
            $Y_Offset = _WinAPI_GetMousePosY(True, $hWnd) - $iY_Thumb
            $iY_Thumb_Prev = $iY_Thumb
            Local $iOutofBounds = False

            While _IsPressed("01")
                $Mouse_Y = _WinAPI_GetMousePosY(True, $hWnd)

                #cs - need to be improved
                    Select  ;halt if out of bounds
                    Case $Mouse_Y < $Y_Offset Or $Mouse_Y - $Y_Offset > $i_TrackHeight - $i_Thumb_Height

                    Switch $iOutofBounds
                    Case True
                    Sleep(10)
                    ContinueLoop

                    Case False
                    $iOutofBounds = True
                    EndSwitch

                    EndSelect
                #ce

                Switch $Mouse_Y - $Y_Offset ;pause if mouse isn't moved
                    Case $iY_Thumb

                        Sleep(10)
                        ContinueLoop

                    Case Else

                        $iY_Thumb = $Mouse_Y - $Y_Offset
                        $iOutofBounds = True
                        $iLine_Scroll = Floor(($iY_Thumb / $iPixel_Per_Line_Scale))
                        $iLine_Scroll_Count = $iLine_Scroll - _GUICtrlEdit_GetFirstVisibleLine($hWnd)
                        _SendMessage($hWnd, $EM_LINESCROLl, 0, $iLine_Scroll_Count)
                        _SendMessage($hWnd, $WM_PAINTSCROLLBAR)

                        Sleep(20)
                EndSwitch

            WEnd

        Case $WM_ARROWDOWN

            ;lParam = +ve : Down Arrow lParam = -ve : Up Arrow
            Local $iDirection = $wParam
            If $wParam = 0 Then $iDirection = _Iif($lParam > 0, $SB_LINEDOWN, $SB_LINEUP)
            _GUICtrlEdit_Scroll($hWnd, $iDirection)

            $iY_Thumb = _Iif($lParam > 0, $iY_Thumb + $iPixel_Per_Line_Scale, $iY_Thumb - $iPixel_Per_Line_Scale)

            _SendMessage($hWnd, $WM_PAINTSCROLLBAR, 0, 0)

            ;Continuous dragging
            Static $i_Start_Drag = False

            If _IsPressed("01") And $i_Start_Drag = False Then
                $iTimer = TimerInit()

                While _IsPressed("01")
                    If TimerDiff($iTimer) >= $iDoubleClickTime Then
                        $i_Start_Drag = True
                        ExitLoop
                    EndIf
                WEnd
            EndIf

            If _IsPressed("01") Then
                Sleep(15)
                _WinAPI_PostMessage($hWnd, $WM_ARROWDOWN, $wParam, $lParam)
            Else
                $i_Start_Drag = False
            EndIf



    EndSwitch

    ; Pass to the Original Window Procedure.
    Return _WinAPI_CallWindowProc($___pOld_WndProc, $hWnd, $iMsg, _
            $wParam, $lParam)
EndFunc   ;==>_New_WndProc

Func hHbmp_ScrollButtons_And_Track($iWidth, $iHeight, $iBkColor, ByRef $aRegion, $iThumb_Y, $iThumb_Height)

    If $iHeight < 2 * ($iWidth_VSCROLL - 2) Then Return 0

    Local $hFont = _GDIPlus_FontCreate($hFamily, $iWidth_VSCROLL / 2 - 1, 2)

    ;Image Containing the Scroll Bar
    $hBmp = _GDIPlus_BitmapCreateFromScan0($iWidth, $iHeight)
    $hGfx_Bmp = _GDIPlus_ImageGetGraphicsContext($hBmp)
    _GDIPlus_GraphicsSetSmoothingMode($hGfx_Bmp, 2)
    _GDIPlus_GraphicsClear($hGfx_Bmp, $iBkColor) ;Set Bkcolor of the Bmp to that of the Edit

    #cs - Doesn't work as expected
        ;Invalidate and erase the part of the edit containing ScrollBar.
        $tRect = Return_CLientRect($hWnd, $iX, $iY, $iX + $iWidth, $iY + $iHeight)
        _WinAPI_RedrawWindow($hWnd, $tRect, 0, BitOR($RDW_INVALIDATE, $RDW_ERASE))
    #ce

    _Gdiplus_PathReset($hPath)

    ;Top Button
    TopBtn_Path($hPath, 0, 1, $iWidth_VSCROLL - 2)
    $aRegion[0] = _GDIPlus_RegionCreateFromPath($hPath)
    _Gdiplus_GraphicsFillPath($hGfx_Bmp, $hPath) ;The Curve part

    _Gdiplus_PathReset($hPath)

    ;Bottom Button
    TopBtn_Path($hPath, 0, $iHeight - $iWidth_VSCROLL + 1, $iWidth_VSCROLL - 2)
    _PathRotate($hPath, 180)
    $aRegion[1] = _GDIPlus_RegionCreateFromPath($hPath)
    _Gdiplus_GraphicsFillPath($hGfx_Bmp, $hPath)

    _Gdiplus_PathReset($hPath)

    ;Thumb
    ThumbBtn_Path($hPath, 0, $iWidth_VSCROLL - 2 + $iThumb_Y, $iThumb_Height, $iWidth_VSCROLL - 2)
    $aRegion[2] = _GDIPlus_RegionCreateFromPath($hPath)
    _Gdiplus_GraphicsFillPath($hGfx_Bmp, $hPath)

    ;Draw something more

    $iSide = $iWidth / 2 - 2
    _GDIPlus_GraphicsDrawArc($hGfx_Bmp, $iWidth / 2 - $iSide, $iWidth_VSCROLL - 2 + $iThumb_Y + $iThumb_Height / 2 - $iSide, 2 * $iSide, 2 * $iSide, 51, 180, $hPen)
    $iSide = $iWidth / 3 - 2
    _GDIPlus_GraphicsDrawArc($hGfx_Bmp, $iWidth / 2 - $iSide, $iWidth_VSCROLL - 2 + $iThumb_Y + $iThumb_Height / 2 - $iSide, 2 * $iSide, 2 * $iSide, 230, 110, $hPen)

    ;Arrows

    $tLayout = _GDIPlus_RectFCreate(0, 0, 0, 0)
    $aInfo = _GDIPlus_GraphicsMeasureString($hGfx_Bmp, ChrW(217), $hFont, $tLayout, $hFormat)
    _GDIPlus_GraphicsDrawStringEx($hGfx_Bmp, ChrW(217), $hFont, $aInfo[0], $hFormat, $hBrush) ;Up Arrow

    $tLayout = _GDIPlus_RectFCreate(0, $iHeight - ($iWidth_VSCROLL - 2) / 2, 0, 0)
    $aInfo = _GDIPlus_GraphicsMeasureString($hGfx_Bmp, ChrW(218), $hFont, $tLayout, $hFormat)
    _GDIPlus_GraphicsDrawStringEx($hGfx_Bmp, ChrW(218), $hFont, $aInfo[0], $hFormat, $hBrush) ;Down Arrow

    ;Draw the image on the GUI
    $hHbmp = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hBmp)

    ;Mem Release
    _GDIPlus_FontDispose($hFont)
    _GDIPlus_GraphicsDispose($hGfx_Bmp)
    _GDIPlus_ImageDispose($hBmp)

    Return $hHbmp
EndFunc   ;==>hHbmp_ScrollButtons_And_Track

#cs
    Func hHbmp_ScrollThumb($iWidth, $iHeight, $iBkColor, ByRef $aRegion, $iThumb_Y, $iThumb_Height)

    _Gdiplus_PathReset($hPath)

    ;Thumb
    ThumbBtn_Path($hPath, 0, $iWidth_VSCROLL - 2 + $iThumb_Y, $iThumb_Height, $iWidth_VSCROLL - 2)
    $aRegion[2] = _GDIPlus_RegionCreateFromPath($hPath)
    _Gdiplus_GraphicsFillPath($hGfx_Bmp, $hPath)

    ;Draw something more

    $iSide = $iWidth / 2 - 2
    _GDIPlus_GraphicsDrawArc($hGfx_Bmp, $iWidth / 2 - $iSide, $iWidth_VSCROLL - 2 + $iThumb_Y + $iThumb_Height / 2 - $iSide, 2 * $iSide, 2 * $iSide, 51, 180, $hPen)
    $iSide = $iWidth / 3 - 2
    _GDIPlus_GraphicsDrawArc($hGfx_Bmp, $iWidth / 2 - $iSide, $iWidth_VSCROLL - 2 + $iThumb_Y + $iThumb_Height / 2 - $iSide, 2 * $iSide, 2 * $iSide, 230, 110, $hPen)

    EndFunc   ;==>hHbmp_ScrollThumb
#ce

Func SetInRange(ByRef $iVar, $iMin, $iMax)
    $iVar = _Iif($iVar < $iMin, $iMin, $iVar)
    $iVar = _Iif($iVar > $iMax, $iMax, $iVar)
EndFunc   ;==>SetInRange

Func Return_CLientRect($hWnd, $iX = -1, $iY = -1, $iWidth = -1, $iHeight = -1)


    $tRect = DllStructCreate($tagRECT)

    If $iX = -1 And $iY = -1 And $iWidth = -1 And $iHeight = -1 Then

        DllStructSetData($tRect, 1, _WinAPI_GetClientWidth($hWnd) + 2)
        DllStructSetData($tRect, 2, 2)
        DllStructSetData($tRect, 3, _WinAPI_GetWindowWidth($hWnd) - 2)
        DllStructSetData($tRect, 4, _WinAPI_GetClientHeight($hWnd))

    Else

        DllStructSetData($tRect, 1, $iX)
        DllStructSetData($tRect, 2, $iY)
        DllStructSetData($tRect, 3, $iX + $iWidth)
        DllStructSetData($tRect, 4, $iY + $iHeight)

    EndIf


    Return $tRect
EndFunc   ;==>Return_CLientRect

Func GetCurLineIndex($hEdit)
    $aSel = _GUICtrlEdit_GetSel($hEdit)
    If $aSel[0] = $aSel[1] Then
        Return _GUICtrlEdit_LineFromChar($hEdit)
    Else
        _GUICtrlEdit_SetSel($hEdit, -1, -1)
        $iRet = _GUICtrlEdit_LineFromChar($hEdit)
        _GUICtrlEdit_SetSel($hEdit, $aSel[0], $aSel[1])
        Return $iRet
    EndIf
EndFunc   ;==>GetCurLineIndex

;Thanks to Guinness - http://www.autoitscript.com/forum/topic/125684-guictrlgetbkcolor-get-the-background-color-of-a-control/
Func GUICtrlGetBkColor($hWnd, $iX = 0, $iY = 0) ;Modified - PXL
    If IsHWnd($hWnd) = 0 Then $hWnd = GUICtrlGetHandle($hWnd)
    Local $hDC = _WinAPI_GetDC($hWnd)
    Local $iColor = _WinAPI_GetPixel($hDC, $iX, $iY)
    _WinAPI_ReleaseDC($hWnd, $hDC)
    Return $iColor
EndFunc   ;==>GUICtrlGetBkColor

;Thanks to UEZ - http://www.autoitscript.com/forum/topic/150160-solved-gdi-path-transform-rotate/#entry1072071
Func _PathRotate($hPath, $iAngle) ;Modified - PXL
    $aBounds = _GdiPLus_PathGetWorldBounds($hPath)
    $hMatrix = _GDIPlus_MatrixCreate()
    _GDIPlus_MatrixTranslate($hMatrix, $aBounds[0] + $aBounds[2] / 2, $aBounds[1] + $aBounds[3] / 2)
    _GDIPlus_MatrixRotate($hMatrix, $iAngle)
    _GDIPlus_MatrixTranslate($hMatrix, -($aBounds[0] + $aBounds[2] / 2), -($aBounds[1] + $aBounds[3] / 2))
    _GDIPlus_PathTransform($hPath, $hMatrix)
    _GDIPlus_MatrixDispose($hMatrix)
EndFunc   ;==>_PathRotate

Func GetLineHeight($hEdit)
    ; Create DC
    $hDC = _WinAPI_GetDC($hEdit)
    $hFont = _SendMessage($hEdit, $WM_GETFONT) ; $WM_GetFont
    $hPrev_Font = _WinAPI_SelectObject($hDC, $hFont)

    Local $tSize = DllStructCreate("int;int")

    DllCall("gdi32.dll", "bool", "GetTextExtentPoint32W", "handle", $hDC, "wstr", "¤", "int", 1, "ptr", DllStructGetPtr($tSize))

    _WinAPI_SelectObject($hDC, $hPrev_Font)
    _WinAPI_ReleaseDC($hEdit, $hDC)

    Return DllStructGetData($tSize, 2)
EndFunc   ;==>GetLineHeight

Func MapWindowPoints($hWndFrom, $hWndTo, $lpPoints, $cPoints)

    $aRet = DllCall("user32.dll", "int", "MapWindowPoints", "hwnd", $hWndFrom, "hwnd", $hWndTo, "ptr", $lpPoints, "int", $cPoints)

    If @error Or $aRet[0] = 0 Then Return SetError(@error, 0, -1)
    Return $aRet[0]

EndFunc   ;==>MapWindowPoints

Test

#include <CScrollBar.au3> ;What ever name you give to the UDF

$hGui = GUICreate("Paths", 400, 400, -1, -1, $WS_SIZEBOX + $WS_MINIMIZEBOX)

Local $String
For $i = 1 To 50 ;No. of lines
    For $j = Random(33, 127, 1) To Random(33, 127, 1) ;No of chars in a line
        $String &= Chr($j)
    Next
    $String &= @CRLF
Next

GUICtrlCreateEdit($String, 5, 5, 200, 300, BitOR($ES_WANTRETURN, $ES_AUTOVSCROLL))
Startup_CustomScrollBar(GUICtrlGetHandle(-1))
GUISetState()


Do
    Switch GUIGetMsg()
        Case $GUI_EVENT_CLOSE
            Shutdown_CustomScrollBar()
            Exit
    EndSwitch
Until 0

The CPU consumed upon moving the thumb is approx 12-18. So is it much enough to stop this project in Autoit. I just want some reviews and what users think about this script. The above is just implemented with Vertical Scrollbar.
Thanks for you time

Edited May 19, 2013 by PhoenixXL

FireFox · May 1, 2013

Hi,

Very nice example. The CPU overload is due to the Draw_ScrollBar function called multiple times for only one move (redrawing the scrollbar 20 times in less than one sec).

I see a possible improvement: shift the code that returns the same thing each time to the startup function and avoid the redraw if it's not necessary.

Br, FireFox.

Edited May 1, 2013 by FireFox

PhoenixXL · May 3, 2013

I see a possible improvement: shift the code that returns the same thing each time to the startup function and avoid the redraw if it's not necessary.

Tried many a times, but upon declaring the local variables( of function Draw_ScrollBar) to global, Autoit crashes on my computer. Edited May 3, 2013 by PhoenixXL

FireFox · May 4, 2013

Here is a start :

#include <GDIP.au3> ;http://www.autoitscript.com/forum/topic/106021-gdipau3/
#include <WinAPIEx.au3>
#include <GuiConstantsEx.au3>
#include <Constants.au3>
#include <WindowsConstants.au3>
#include <ScrollBarConstants.au3>
#include <Misc.au3>
#include <GUIEdit.au3>
#include <Array.au3>

Global $iWidth_VSCROLL = _WinAPI_GetSystemMetrics($SM_CXVSCROLL)
Global $hGraphic, $hGraphicGUI, $hBMPBuff

;Double-Click
Global $iDoubleClickTime = DllCall("user32.dll", "uint", "GetDoubleClickTime")
$iDoubleClickTime = $iDoubleClickTime[0]

;User-Custom Messages
Global $WM_UPDATETHUMB = $WM_APP + 11
Global $WM_THUMBMOVE = $WM_APP + 12
Global $WM_ARROWDOWN = $WM_APP + 13

Global Const $tagNCCALCSIZE_PARAMS = $tagRECT & ";" & $tagRECT & ";" & $tagRECT & ";ptr PWINDOWPOS"

; Register callback function and obtain handle to _New_WndProc
Global $___hNew_WndProc = DllCallbackRegister("_New_WndProc", "int", "hwnd;uint;wparam;lparam")
; Get pointer to _New_WndProc
Global $___pNew_WndProc = DllCallbackGetPtr($___hNew_WndProc)

Global $___cEdit ; Handle of the Edit
Global $___pOld_WndProc ; Old Window Procedure's Address

Global $_hPen = 0, $_hBrush = 0, $_hFormat = 0, $_hFamily = 0

_GDIPlus_Startup()

Func Startup_CustomScrollBar($hEdit)
    $___cEdit = $hEdit
    $___pOld_WndProc = _SubClass($hEdit, $___pNew_WndProc)

    _WinAPI_SetWindowPos($hEdit, Default, Default, Default, Default, Default, $SWP_FRAMECHANGED)

    $_hPen = _GDIPlus_PenCreate(0xAAFCD667, 2)
    $_hBrush = _GDIPlus_BrushCreateSolid(0xAAFCD667)

    $_hFormat = _GDIPlus_StringFormatCreate()
    $_hFamily = _GDIPlus_FontFamilyCreate("Wingdings")
EndFunc   ;==>Startup_CustomScrollBar

Func Shutdown_CustomScrollBar();Mem Release
    _SubClass($___cEdit, $___pOld_WndProc)

    DllCallbackFree($___hNew_WndProc)

    _GDIPlus_FontFamilyDispose($_hFamily)
    _GDIPlus_StringFormatDispose($_hFormat)

    _GDIPlus_BrushDispose($_hBrush)
    _GDIPlus_PenDispose($_hPen)
EndFunc   ;==>Shutdown_CustomScrollBar

Func TopBtn_Path(ByRef $hPath, $iX, $iY, $iSide)
    ;* Not required when the path is in order.

    _GDIPlus_PathStartFigure($hPath)
    _GDIPlus_PathAddLine($hPath, $iX + $iSide, $iY + $iSide, $iX + $iSide, $iY)
    _GDIPlus_PathAddLine($hPath, $iX + $iSide, $iY, $iX, $iY)
    _GDIPlus_PathAddLine($hPath, $iX, $iY, $iX, $iY + $iSide)
    _GDIPlus_PathAddArc($hPath, $iX, $iY + $iSide / 2, $iSide, $iSide, 180, 180)
    _GDIPlus_PathCloseFigure($hPath)
EndFunc   ;==>TopBtn_Path

Func ThumbBtn_Path(ByRef $hPath, $iX, $iY, $iHeight, $iSide)
    ;* Not required when the path is in order.

    _GDIPlus_PathStartFigure($hPath)
    _GDIPlus_PathAddLine($hPath, $iX, $iY, $iX, $iY + $iHeight)
    _GDIPlus_PathAddArc($hPath, $iX, $iY + $iHeight - $iSide / 2, $iSide, $iSide, 180, -180)
    _GDIPlus_PathAddLine($hPath, $iX + $iSide, $iY + $iHeight, $iX + $iSide, $iY)
    _GDIPlus_PathAddArc($hPath, $iX, $iY - $iSide / 2, $iSide, $iSide, -180, 180)
    _GDIPlus_PathCloseFigure($hPath)
EndFunc   ;==>ThumbBtn_Path

Func _SubClass($hWnd, $pNew_WindowProc)
    Local $iRes = _WinAPI_SetWindowLong($hWnd, -4, $pNew_WindowProc)
    If @error Then Return SetError(1, 0, 0)
    If $iRes = 0 Then Return SetError(1, 0, 0)

    Return SetError(0, 0, $iRes)
EndFunc   ;==>_SubClass

Func _New_WndProc($hWnd, $iMsg, $wParam, $lParam)
    Switch $iMsg
        Case $WM_SETCURSOR, $WM_NCMOUSEMOVE, $WM_MOUSEMOVE, $WM_MOUSELEAVE
            Return _WinAPI_CallWindowProc($___pOld_WndProc, $hWnd, $iMsg, $wParam, $lParam)
    EndSwitch

    Local Static $aRegion[3], $i_Thumb_Height = 0, $i_TrackHeight = 0, $iY_Thumb = 0, $iPixel_Per_Line_Scale = 1
    Local Static $hDC = 0, $hGfx = 0, $tPoint = DllStructCreate($tagPOINT), $blTop = False, $blBottom = False

    If $hDC = 0 Then
        $hDC = _WinAPI_GetWindowDC($hWnd)
        $hGfx = _GDIPlus_GraphicsCreateFromHDC($hDC)
    EndIf

    Switch $iMsg
        Case $WM_NCCALCSIZE
            Local $tNCCALCSIZE_PARAMS = DllStructCreate($tagNCCALCSIZE_PARAMS, $lParam)

            DllStructSetData($tNCCALCSIZE_PARAMS, 1, DllStructGetData($tNCCALCSIZE_PARAMS, 1) + 2)
            DllStructSetData($tNCCALCSIZE_PARAMS, 2, DllStructGetData($tNCCALCSIZE_PARAMS, 2) + 2)
            DllStructSetData($tNCCALCSIZE_PARAMS, 3, DllStructGetData($tNCCALCSIZE_PARAMS, 3) - 2 - $iWidth_VSCROLL) ;Space for VSCROLL Bar
            DllStructSetData($tNCCALCSIZE_PARAMS, 4, DllStructGetData($tNCCALCSIZE_PARAMS, 4) - 2)

            $tNCCALCSIZE_PARAMS = 0

            Return 0
        Case $WM_NCPAINT, $WM_NCACTIVATE
;~          $iRet = _WinAPI_CallWindowProc($___pOld_WndProc, $hWnd, $iMsg, $wParam, $lParam)

            $iX = _WinAPI_GetClientWidth($hWnd) + 2
            $iY = 2
            $iWidth = _WinAPI_GetWindowWidth($hWnd) - _WinAPI_GetClientWidth($hWnd) - 4
            $iHeight = _WinAPI_GetClientHeight($hWnd)

            Local $iY_Thumbtmp = $iY_Thumb

            ;Set the Range
            SetInRange($i_Thumb_Height, 15, $i_TrackHeight)
            SetInRange($iY_Thumbtmp, 0, $i_TrackHeight - $i_Thumb_Height)

            If Not $blTop And Not $blBottom _ ;not initialized
                    Or ($iY_Thumbtmp = $iY_Thumb _ ;in the range
                    And ($blTop And $iY_Thumbtmp > 0 Or Not $blTop) _ ;not already at the top
                    And ($blBottom And $iY_Thumbtmp < ($i_TrackHeight - $i_Thumb_Height) Or Not $blBottom)) Then ;not already at the bottom

                $iY_Thumbtmp = _Iif($iY_Thumbtmp < 0, 0, $iY_Thumbtmp)
                Draw_ScrollBar($hGfx, $iX, $iY, $iWidth, $iHeight, 0xFF000000 + GUICtrlGetBkColor($hWnd, $iX - 2, $iHeight), $aRegion, $iY_Thumbtmp, $i_Thumb_Height)
            EndIf

            $iY_Thumb = $iY_Thumbtmp

            If $iY_Thumb = 0 Then
                $blTop = True
                $blBottom = False
            ElseIf $iY_Thumb = $i_TrackHeight - $i_Thumb_Height Then
                $blBottom = True
                $blTop = False
            EndIf

;~          Return $iRet
        Case $WM_NCHITTEST
            DllStructSetData($tPoint, 1, _WinAPI_LoWord($lParam))
            DllStructSetData($tPoint, 2, _WinAPI_HiWord($lParam))

            _WinAPI_ScreenToClient($hWnd, $tPoint)

            $tRect = Return_CLientRect($hWnd)

            If _WinAPI_PtInRect($tRect, $tPoint) Then Return $HTBORDER
        Case $WM_NCLBUTTONDOWN
            Local $tPoint2 = _WinAPI_GetMousePos(True, $hWnd)

            If _GDIPlus_RegionIsVisiblePoint($aRegion[0], DllStructGetData($tPoint2, 1) - _WinAPI_GetClientWidth($hWnd) - 2, DllStructGetData($tPoint2, 2) - 2, $hGfx) Then
                _WinAPI_PostMessage($hWnd, $WM_ARROWDOWN, $SB_LINEUP, 0)
            ElseIf _GDIPlus_RegionIsVisiblePoint($aRegion[1], DllStructGetData($tPoint2, 1) - _WinAPI_GetClientWidth($hWnd) - 2, DllStructGetData($tPoint2, 2) - 2, $hGfx) Then
                _WinAPI_PostMessage($hWnd, $WM_ARROWDOWN, $SB_LINEDOWN, 1)
            ElseIf _GDIPlus_RegionIsVisiblePoint($aRegion[2], DllStructGetData($tPoint2, 1) - _WinAPI_GetClientWidth($hWnd) - 2, DllStructGetData($tPoint2, 2) - 2, $hGfx) Then
                _WinAPI_PostMessage($hWnd, $WM_THUMBMOVE, 0, 0)
            Else
                $tRect = Return_CLientRect($hWnd)

                If _WinAPI_PtInRect($tRect, $tPoint2) Then
                    $iY_Thumb = DllStructGetData($tPoint2, 2) - (($i_Thumb_Height / 2) + ($iWidth_VSCROLL - 2))
                    $iLine_Scroll = Floor(($iY_Thumb / $iPixel_Per_Line_Scale))
                    $iLine_Scroll_Count = $iLine_Scroll - _GUICtrlEdit_GetFirstVisibleLine($hWnd)

                    _SendMessage($hWnd, $EM_LINESCROLL, 0, $iLine_Scroll_Count)
                    _SendMessage($hWnd, $WM_NCPAINT, 0, 0)
                EndIf
            EndIf
        Case $WM_SIZING, $WM_SIZE, $WM_CHAR, $WM_UNDO, $EM_UNDO, $WM_HOTKEY
            _WinAPI_PostMessage($hWnd, $WM_UPDATETHUMB, 0, 0)
        Case $WM_KEYDOWN
            Switch $wParam
                Case $VK_DOWN, $VK_UP, $VK_PRIOR, $VK_NEXT ;Down
;~                  $iRet = _WinAPI_CallWindowProc($___pOld_WndProc, $hWnd, $iMsg, $wParam, $lParam)

                    _SendMessage($hWnd, $WM_UPDATETHUMB, 0, 0)

;~                  Return $iRet
                Case $VK_END, $VK_HOME
                    If _IsPressed("11") Then ;CTRL Pressed
                        _SendMessage($hWnd, $WM_VSCROLL, _WinAPI_MakeLong($SB_BOTTOM + $VK_END - $wParam, 0))

                        $iY_Thumb = _Iif($wParam = $VK_END, $i_TrackHeight - $i_Thumb_Height, 0)

                        ;Redraw the window, _WinAPI_RedrawWindow didn't work
                        _SendMessage($hWnd, $WM_NCPAINT, 0, 0)
                    EndIf
            EndSwitch
        Case $WM_MOUSEWHEEL
            $iDelta = _WinAPI_HiWord($wParam)
            $iCount = Abs($iDelta) / 120

            For $i = 1 To $iCount
                _SendMessage($hWnd, $WM_ARROWDOWN, _Iif($iDelta > 0, $SB_LINEUP, $SB_LINEDOWN), -$iDelta)
            Next
        Case $WM_UPDATETHUMB
            ;Calculate the required vars
            $i_LineCount = _GUICtrlEdit_GetLineCount($hWnd)
            $i_ScrollBarHeight = _WinAPI_GetClientHeight($hWnd)
            $i_LineHeight = GetLineHeight($hWnd)
            $iMax_LineVisible = Floor($i_ScrollBarHeight / $i_LineHeight)
            $i_PageHeight = $i_LineCount * $i_LineHeight
            $i_TrackHeight = $i_ScrollBarHeight - (2 * ($iWidth_VSCROLL - 2))
            $i_CurLine = _GUICtrlEdit_GetFirstVisibleLine($hWnd)

            ;Set the Thumb size
            $i_Thumb_Height = $i_TrackHeight * ($iMax_LineVisible * $i_LineHeight / $i_PageHeight)

            ;Set the Scale
            $iPixel_Per_Line_Scale = ($i_TrackHeight - $i_Thumb_Height) / ($i_LineCount - $iMax_LineVisible)

            ;Set the Thumb Pos
            $iY_Thumb = (($i_CurLine / ($i_LineCount - $iMax_LineVisible)) * ($i_TrackHeight - $i_Thumb_Height))

            ;Redraw the window, _Winapi_RedrawWindow didn't work
            _SendMessage($hWnd, $WM_NCPAINT, 0, 0)
        Case $WM_THUMBMOVE
            $iLine_InPage = _WinAPI_GetClientHeight($hWnd) / GetLineHeight($hWnd)
            $Y_Offset = _WinAPI_GetMousePosY(True, $hWnd) - $iY_Thumb
            $iY_Thumb_Prev = $iY_Thumb

            While _IsPressed("01")
                $Mouse_Y = _WinAPI_GetMousePosY(True, $hWnd)
                $iY_Thumb = $Mouse_Y - $Y_Offset

                $iLine_Scroll = Floor(($iY_Thumb / $iPixel_Per_Line_Scale))
                $iLine_Scroll_Count = $iLine_Scroll - _GUICtrlEdit_GetFirstVisibleLine($hWnd)
                _SendMessage($hWnd, $EM_LINESCROLL, 0, $iLine_Scroll_Count)
                _SendMessage($hWnd, $WM_NCPAINT, 0, 0)

                $iY_Thumb_Prev = $iY_Thumb

                Sleep(10)
            WEnd
        Case $WM_ARROWDOWN
            ;lParam = +ve : Down Arrow lParam = -ve : Up Arrow
            Local $iDirection = $wParam
            If $wParam = 0 Then $iDirection = _Iif($lParam > 0, $SB_LINEDOWN, $SB_LINEUP)
            _GUICtrlEdit_Scroll($hWnd, $iDirection)

            $iY_Thumb = _Iif($lParam > 0, $iY_Thumb + $iPixel_Per_Line_Scale, $iY_Thumb - $iPixel_Per_Line_Scale)

            _SendMessage($hWnd, $WM_NCPAINT, 0, 0)

            ;Continuous dragging
            Static $i_Start_Drag = False

            If _IsPressed("01") And $i_Start_Drag = False Then
                $iTimer = TimerInit()

                While _IsPressed("01")
                    If TimerDiff($iTimer) >= $iDoubleClickTime Then
                        $i_Start_Drag = True
                        ExitLoop
                    EndIf

                    Sleep(10)
                WEnd
            EndIf

            If _IsPressed("01") Then
                Sleep(15)
                _WinAPI_PostMessage($hWnd, $WM_ARROWDOWN, $wParam, $lParam)
            Else
                $i_Start_Drag = False
            EndIf
    EndSwitch

    ; Pass to the Original Window Procedure.
    Return _WinAPI_CallWindowProc($___pOld_WndProc, $hWnd, $iMsg, $wParam, $lParam)
EndFunc   ;==>_New_WndProc

Func Draw_ScrollBar($hGfx, $iX, $iY, $iWidth, $iHeight, $iBkColor, ByRef $aRegion, $iThumb_Y, $iThumb_Height)
    $hPath = _GDIPlus_PathCreate() ;Our Path

    $hFont = _GDIPlus_FontCreate($_hFamily, $iWidth_VSCROLL / 2 - 1, 2)

    ;Image Containing the Scroll Bar
    $hBmp = _GDIPlus_BitmapCreateFromScan0($iWidth, $iHeight)
    $hGfx_Bmp = _GDIPlus_ImageGetGraphicsContext($hBmp)
    _GDIPlus_GraphicsSetSmoothingMode($hGfx_Bmp, 2)
    _GDIPlus_GraphicsClear($hGfx_Bmp, $iBkColor) ;Set Bkcolor of the Bmp to that of the Edit

    #cs - Doesn't work as expected
        ;Invalidate and erase the part of the edit containing ScrollBar.
        $tRect = Return_CLientRect($hWnd, $iX, $iY, $iX + $iWidth, $iY + $iHeight)
        _WinAPI_RedrawWindow($hWnd, $tRect, 0, BitOR($RDW_INVALIDATE, $RDW_ERASE))
    #ce

    ;Top Button
    TopBtn_Path($hPath, 0, 1, $iWidth_VSCROLL - 2)
    $aRegion[0] = _GDIPlus_RegionCreateFromPath($hPath)
    _Gdiplus_GraphicsFillPath($hGfx_Bmp, $hPath) ;The Curve part

    _Gdiplus_PathReset($hPath)

    ;Bottom Button
    TopBtn_Path($hPath, 0, $iHeight - $iWidth_VSCROLL + 1, $iWidth_VSCROLL - 2)
    _PathRotate($hPath, 180)
    $aRegion[1] = _GDIPlus_RegionCreateFromPath($hPath)
    _Gdiplus_GraphicsFillPath($hGfx_Bmp, $hPath)

    _Gdiplus_PathReset($hPath)

    ;Thumb
    ThumbBtn_Path($hPath, 0, $iWidth_VSCROLL - 2 + $iThumb_Y, $iThumb_Height, $iWidth_VSCROLL - 2)
    $aRegion[2] = _GDIPlus_RegionCreateFromPath($hPath)
    _Gdiplus_GraphicsFillPath($hGfx_Bmp, $hPath)

    ;Draw something more
    $iSide = $iWidth / 2 - 2
    _GDIPlus_GraphicsDrawArc($hGfx_Bmp, $iWidth / 2 - $iSide, $iWidth_VSCROLL - 2 + $iThumb_Y + $iThumb_Height / 2 - $iSide, 2 * $iSide, 2 * $iSide, 51, 180, $_hPen)
    $iSide = $iWidth / 3 - 2
    _GDIPlus_GraphicsDrawArc($hGfx_Bmp, $iWidth / 2 - $iSide, $iWidth_VSCROLL - 2 + $iThumb_Y + $iThumb_Height / 2 - $iSide, 2 * $iSide, 2 * $iSide, 230, 110, $_hPen)

    ;Arrows
    $tLayout = _GDIPlus_RectFCreate(0, 0, 0, 0)
    $aInfo = _GDIPlus_GraphicsMeasureString($hGfx_Bmp, ChrW(217), $hFont, $tLayout, $_hFormat)
    _GDIPlus_GraphicsDrawStringEx($hGfx_Bmp, ChrW(217), $hFont, $aInfo[0], $_hFormat, $_hBrush) ;Up Arrow

    $tLayout = _GDIPlus_RectFCreate(0, $iHeight - ($iWidth_VSCROLL - 2) / 2, 0, 0)
    $aInfo = _GDIPlus_GraphicsMeasureString($hGfx_Bmp, ChrW(218), $hFont, $tLayout, $_hFormat)
    _GDIPlus_GraphicsDrawStringEx($hGfx_Bmp, ChrW(218), $hFont, $aInfo[0], $_hFormat, $_hBrush) ;Down Arrow

    ;Draw the image on the GUI
    _GDIPlus_GraphicsDrawImage($hGfx, $hBmp, $iX, $iY)

    ;Mem Release
    _GDIPlus_PathDispose($hPath)
    _GDIPlus_FontDispose($hFont)

    _GDIPlus_GraphicsDispose($hGfx_Bmp)
    _GDIPlus_ImageDispose($hBmp)

    Return 1
EndFunc   ;==>Draw_ScrollBar

Func SetInRange(ByRef $iVar, $iMin, $iMax)
    $iVar = _Iif($iVar < $iMin, $iMin, $iVar)
    $iVar = _Iif($iVar > $iMax, $iMax, $iVar)
EndFunc   ;==>SetInRange

Func Return_CLientRect($hWnd, $iX = -1, $iY = -1, $iWidth = -1, $iHeight = -1)
    $tRect = DllStructCreate($tagRECT)

    If $iX = -1 And $iY = -1 And $iWidth = -1 And $iHeight = -1 Then
        DllStructSetData($tRect, 1, _WinAPI_GetClientWidth($hWnd) + 2)
        DllStructSetData($tRect, 2, 2)
        DllStructSetData($tRect, 3, _WinAPI_GetWindowWidth($hWnd) - 2)
        DllStructSetData($tRect, 4, _WinAPI_GetClientHeight($hWnd))
    Else
        DllStructSetData($tRect, 1, $iX)
        DllStructSetData($tRect, 2, $iY)
        DllStructSetData($tRect, 3, $iX + $iWidth)
        DllStructSetData($tRect, 4, $iY + $iHeight)
    EndIf

    Return $tRect
EndFunc   ;==>Return_CLientRect

Func GetCurLineIndex($hEdit)
    $aSel = _GUICtrlEdit_GetSel($hEdit)
    If $aSel[0] = $aSel[1] Then
        Return _GUICtrlEdit_LineFromChar($hEdit)
    Else
        _GUICtrlEdit_SetSel($hEdit, -1, -1)
        $iRet = _GUICtrlEdit_LineFromChar($hEdit)
        _GUICtrlEdit_SetSel($hEdit, $aSel[0], $aSel[1])
        Return $iRet
    EndIf
EndFunc   ;==>GetCurLineIndex

;Thanks to Guinness - http://www.autoitscript.com/forum/topic/125684-guictrlgetbkcolor-get-the-background-color-of-a-control/
Func GUICtrlGetBkColor($hWnd, $iX = 0, $iY = 0) ;Modified - PXL
    If IsHWnd($hWnd) = 0 Then $hWnd = GUICtrlGetHandle($hWnd)
    Local $hDC = _WinAPI_GetDC($hWnd)
    Local $iColor = _WinAPI_GetPixel($hDC, $iX, $iY)
    _WinAPI_ReleaseDC($hWnd, $hDC)
    Return $iColor
EndFunc   ;==>GUICtrlGetBkColor

;Thanks to UEZ - http://www.autoitscript.com/forum/topic/150160-solved-gdi-path-transform-rotate/#entry1072071
Func _PathRotate($hPath, $iAngle) ;Modified - PXL
    $aBounds = _GdiPLus_PathGetWorldBounds($hPath)
    $hMatrix = _GDIPlus_MatrixCreate()
    _GDIPlus_MatrixTranslate($hMatrix, $aBounds[0] + $aBounds[2] / 2, $aBounds[1] + $aBounds[3] / 2)
    _GDIPlus_MatrixRotate($hMatrix, $iAngle)
    _GDIPlus_MatrixTranslate($hMatrix, -($aBounds[0] + $aBounds[2] / 2), -($aBounds[1] + $aBounds[3] / 2))
    _GDIPlus_PathTransform($hPath, $hMatrix)
    _GDIPlus_MatrixDispose($hMatrix)
EndFunc   ;==>_PathRotate

Func GetLineHeight($hEdit)
    ; Create DC
    $hDC = _WinAPI_GetDC($hEdit)
    $_hFont = _SendMessage($hEdit, $WM_GETFONT) ; $WM_GetFont
    $hPrev_Font = _WinAPI_SelectObject($hDC, $_hFont)

    Local $tSize = DllStructCreate("int;int")

    DllCall("gdi32.dll", "bool", "GetTextExtentPoint32W", "handle", $hDC, "wstr", "¤", "int", 1, "ptr", DllStructGetPtr($tSize))

    _WinAPI_SelectObject($hDC, $hPrev_Font)
    _WinAPI_ReleaseDC($hEdit, $hDC)

    Return DllStructGetData($tSize, 2)
EndFunc   ;==>GetLineHeight

I don't know why the scrollbar is not visible on the start up, however the idea is here.

Draw the scrollbar only if there is a move, this can be much improved.

Br, FireFox.

tonyatcodeleakers · May 4, 2013

Im pretty sure your looking for a marquee effect, melba made a decent one that i have used (works great as a mini console for errors)

FireFox · May 4, 2013

PhoenixXL · May 5, 2013

tony, this topic has no relation with marquee

I guess it would be better if we would just draw the required part that is if the user clicks the thumb, the thumb is only updated rather than the whole bitmap.

The graphics object could be updated in every resize message. Lets find out where it goes

Thanks for the suggestion firefox.

PhoenixXL · May 19, 2013

Updated the example with a PIC control.

Increased the sleep in the ThumbMove,

made the local constants as global variables

CPU usage is reduced by 25%

Edited May 19, 2013 by PhoenixXL

mesale0077 · May 19, 2013

very cool

Custom Scrollbar

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