square65 Posted February 14, 2015 Share Posted February 14, 2015 (edited) It's not covered anywhere in the wiki. I can see from its context that it has to do with a checkbox being checked. But in code examples it's usage baffles me. Return BitAND(GUICtrlRead($idControlID), $GUI_CHECKED) = $GUI_CHECKED Really doesn't make any sense to me. Here's the example I'm looking at: expandcollapse popup#include <GUIConstantsEx.au3> #include <MsgBoxConstants.au3> Example() Func Example() ; Create a GUI with various controls. Local $hGUI = GUICreate("Example", 300, 200) ; Create a checkbox control. Local $idCheckbox = GUICtrlCreateCheckbox("Standard Checkbox", 10, 10, 185, 25) Local $idClose = GUICtrlCreateButton("Close", 210, 170, 85, 25) ; Display the GUI. GUISetState(@SW_SHOW, $hGUI) ; Loop until the user exits. While 1 ;guigetmsg polls the gui to see if any events have occurred Switch GUIGetMsg() Case $GUI_EVENT_CLOSE, $idClose ExitLoop Case $idCheckbox If _IsChecked($idCheckbox) Then MsgBox($MB_SYSTEMMODAL, "", "The checkbox is checked.", 0, $hGUI) Else MsgBox($MB_SYSTEMMODAL, "", "The checkbox is not checked.", 0, $hGUI) EndIf EndSwitch WEnd ; Delete the previous GUI and all controls. GUIDelete($hGUI) EndFunc ;==>Example Func _IsChecked($idControlID) ;bitand is just an 'and' ;guictrlread reads the state or data of a control Return BitAND(GUICtrlRead($idControlID), $GUI_CHECKED) = $GUI_CHECKED EndFunc ;==>_IsChecked I'm able to replace that BitAND with: Return GUICtrlRead($idControlID) And as far as I can tell, the example works exactly the same. Edited February 14, 2015 by square65 Link to comment Share on other sites More sharing options...
Moderators Solution Melba23 Posted February 14, 2015 Moderators Solution Share Posted February 14, 2015 square65,$GUI_CHECKED is a constant in the GUIConstantsEx.au3 file which indicated the "checked" state of a checkbox or radio - and of course there is an equivalent $GUI_UNCHECKED. You can see from the Help file that GUICtrlRead actually returns the control state for checkboxes and radios - unless the advanced parameter is set. As far as I know, this rather confusing behaviour has been part of AutoIt since it began so just accept it. Anyway, looking at the table on the GUICtrlSetState page of the Help file you can see that there are many possible states and several of them can be applied at the same time - so it is quite possible that a checkbox could be, for example, both checked and disabled. in this case, the return from GUICtrlRead would not be a simple $GUI_CHECKED, but would actually be BitOr($GUI_CHECKED, $GUI_DISABLE) and a simple check for $GUI_CHECKED would fail. So you should use BitAnd to check whether the returned value contains the value you wish - although in many cases a simple comparison is valid as there will be only the one state returned. That brings us on to the subject of binary maths and using bits as flags - I suggest reading the early paragraphs of the Setting Styles tutorial in the Wiki which explains in some detail why you need to use the Bit* functions to combine and read styles - and states. I hope that helps - please ask again if not. M23 square65 1 Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind Open spoiler to see my UDFs: Spoiler ArrayMultiColSort ---- Sort arrays on multiple columnsChooseFileFolder ---- Single and multiple selections from specified path treeview listingDate_Time_Convert -- Easily convert date/time formats, including the language usedExtMsgBox --------- A highly customisable replacement for MsgBoxGUIExtender -------- Extend and retract multiple sections within a GUIGUIFrame ---------- Subdivide GUIs into many adjustable framesGUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView itemsGUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeViewMarquee ----------- Scrolling tickertape GUIsNoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxesNotify ------------- Small notifications on the edge of the displayScrollbars ----------Automatically sized scrollbars with a single commandStringSize ---------- Automatically size controls to fit textToast -------------- Small GUIs which pop out of the notification area Link to comment Share on other sites More sharing options...
square65 Posted February 14, 2015 Author Share Posted February 14, 2015 Yep. It was nothing like what I was guessing and that helped a lot. Especially to get me a deeper understanding of the intricacies of the language. Thanks Link to comment Share on other sites More sharing options...
Moderators Melba23 Posted February 14, 2015 Moderators Share Posted February 14, 2015 square65,Glad I could help and that you understood. Never be afraid to ask questions like this. I am sure that there are lot of other members who are very glad that you decided to ask this one - the answer to which is not as simple as it looks at first sight. M23 square65 1 Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind Open spoiler to see my UDFs: Spoiler ArrayMultiColSort ---- Sort arrays on multiple columnsChooseFileFolder ---- Single and multiple selections from specified path treeview listingDate_Time_Convert -- Easily convert date/time formats, including the language usedExtMsgBox --------- A highly customisable replacement for MsgBoxGUIExtender -------- Extend and retract multiple sections within a GUIGUIFrame ---------- Subdivide GUIs into many adjustable framesGUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView itemsGUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeViewMarquee ----------- Scrolling tickertape GUIsNoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxesNotify ------------- Small notifications on the edge of the displayScrollbars ----------Automatically sized scrollbars with a single commandStringSize ---------- Automatically size controls to fit textToast -------------- Small GUIs which pop out of the notification area Link to comment Share on other sites More sharing options...
TheDcoder Posted February 14, 2015 Share Posted February 14, 2015 As always GREAT explanation Melba23, I was looking for this Intel EasyCodeIt - A cross-platform AutoIt implementation - Fund the development! (GitHub will double your donations for a limited time) DcodingTheWeb Forum - Follow for updates and Join for discussion Link to comment Share on other sites More sharing options...
BrewManNH Posted February 14, 2015 Share Posted February 14, 2015 You can see from the Help file that GUICtrlRead actually returns the control state for checkboxes and radios - unless the advanced parameter is set. As far as I know, this rather confusing behaviour has been part of AutoIt since it began so just accept it. Anyway, looking at the table on the GUICtrlSetState page of the Help file you can see that there are many possible states and several of them can be applied at the same time - so it is quite possible that a checkbox could be, for example, both checked and disabled. in this case, the return from GUICtrlRead would not be a simple $GUI_CHECKED, but would actually be BitOr($GUI_CHECKED, $GUI_DISABLE) and a simple check for $GUI_CHECKED would fail. So you should use BitAnd to check whether the returned value contains the value you wish - although in many cases a simple comparison is valid as there will be only the one state returned. Actually,I don't think this is true. If you use GUICtrlRead on a checkbox, the only 2 returns you'll get are 1 and 4. 1 being equal to $GUI_CHECKED and 4 being equal to $GUI_UNCHECKED. I am not sure why it says what it says in the help file, but that has never returned the state of the checkbox or a radio control. You can try it yourself and see what I'm talking about. If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag GudeHow to ask questions the smart way! I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript.com forums, unless I've specifically stated otherwise in the code or the thread post. If you do use my code all I ask, as a courtesy, is to make note of where you got it from. Back up and restore Windows user files _Array.au3 - Modified array functions that include support for 2D arrays. - ColorChooser - An add-on for SciTE that pops up a color dialog so you can select and paste a color code into a script. - Customizable Splashscreen GUI w/Progress Bar - Create a custom "splash screen" GUI with a progress bar and custom label. - _FileGetProperty - Retrieve the properties of a file - SciTE Toolbar - A toolbar demo for use with the SciTE editor - GUIRegisterMsg demo - Demo script to show how to use the Windows messages to interact with controls and your GUI. - Latin Square password generator Link to comment Share on other sites More sharing options...
Moderators Melba23 Posted February 14, 2015 Moderators Share Posted February 14, 2015 (edited) BrewManNH,After testing it looks as though you are right - not that I doubted you. A change in the Help file text for GUICtrlRead seems indicated. M23Edit: And done. Edited February 14, 2015 by Melba23 Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind Open spoiler to see my UDFs: Spoiler ArrayMultiColSort ---- Sort arrays on multiple columnsChooseFileFolder ---- Single and multiple selections from specified path treeview listingDate_Time_Convert -- Easily convert date/time formats, including the language usedExtMsgBox --------- A highly customisable replacement for MsgBoxGUIExtender -------- Extend and retract multiple sections within a GUIGUIFrame ---------- Subdivide GUIs into many adjustable framesGUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView itemsGUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeViewMarquee ----------- Scrolling tickertape GUIsNoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxesNotify ------------- Small notifications on the edge of the displayScrollbars ----------Automatically sized scrollbars with a single commandStringSize ---------- Automatically size controls to fit textToast -------------- Small GUIs which pop out of the notification area Link to comment Share on other sites More sharing options...
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