How to change the back color of button created with _GUICtrlButton_Create function ?

[kcvinu]

Hi all,

I have a button created with _GUICtrlButton_Create function. I know that this function returns a handle of button instead of an ID. So i have obtain control ID by calling _WinAPI_GetDlgCtrlID function. After that i have tried the GUICtrlSetBkColor function. But it didnt worked. Any suggestions will be appreciated. Thanks in advance. 

Note : - The window which carries this button is not created with native gui create function. Instead, it is created with CreateWindowEx api function.

[funkey]

GUICtrlSetBkColor does not work because AutoIt handles this only for the buildin standard controls.

I don't think you really want this, but the only way is to use an ownerdrawn button. This is a lot of work for something like changing the background color.

 

Here is an example from 

I only changed the GUICtrlCreateButton to _GUICtrlButton_Create

 

expandcollapse popup

; *******************************************************
; Example - Create an ownerdrawn/colored button
; *******************************************************

#AutoIt3Wrapper_UseX64=n

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <ButtonConstants.au3>

#include <GuiButton.au3>

Example()

Func Example()
    Local Const $BS_OWNERDRAW = 0x0000000B
    Local $hGUI, $nButton, $hButton, $nButton2, $GUIMsg

    $hGUI = GUICreate("My Ownerdrawn Created Button", 300, 200)

;~     $nButton = GUICtrlCreateButton("", 90, 50, 120, 40)
;~     GUICtrlSetStyle($nButton, BitOR($WS_TABSTOP, $BS_NOTIFY, $BS_MULTILINE, $BS_OWNERDRAW)) ; Set the ownerdrawn flag
    $hButton = _GUICtrlButton_Create($hGUI, "", 90, 50, 120, 40, BitOR($WS_TABSTOP, $BS_NOTIFY, $BS_MULTILINE, $BS_OWNERDRAW))
    $nButton = _WinAPI_GetDlgCtrlID($hButton)
    $nButton2 = GUICtrlCreateButton("Normal Button", 90, 110, 120, 30)

    GUIRegisterMsg($WM_COMMAND, "MY_WM_COMMAND")
    ; WM_DRAWITEM has to registered before showing GUI otherwise the initial drawing isn't done
    GUIRegisterMsg($WM_DRAWITEM, "MY_WM_DRAWITEM")

    GUISetState()

    While 1
        $GUIMsg = GUIGetMsg()

        Switch $GUIMsg
            Case $GUI_EVENT_CLOSE
                ExitLoop

            Case $nButton
                ; Normally should not run through cause of our MY_WM_COMMAND function
                MsgBox(0, "Info", "Button pressed")

            Case $nButton2
                ; Normally should not run through cause of our MY_WM_COMMAND function
                MsgBox(0, "Info", "Button2 pressed")
        EndSwitch
    WEnd
EndFunc   ;==>Example

; React on a button click
Func MY_WM_COMMAND($hWnd, $Msg, $wParam, $lParam)
    $nNotifyCode = BitShift($wParam, 16)
    $nID = BitAND($wParam, 0x0000FFFF)
    $hCtrl = $lParam

    If $nID <> 2 And $nNotifyCode = 0 Then ; Check for IDCANCEL - 2
        ; Ownerdrawn buttons don't send something by pressing ENTER
        ; So IDOK - 1 comes up, now check for the control that has the current focus
        If $nID = 1 Then
            $hFocus = DllCall("user32.dll", "hwnd", "GetFocus")
            $nCtrlID = DllCall("user32.dll", "int", "GetDlgCtrlID", "hwnd", $hFocus[0])
            PostButtonclick($hWnd, $nCtrlID[0])
        Else
            MsgBox(0, "MY_WM_COMMAND", "GUIHWnd" & @TAB & ":" & $hWnd & @LF & _
                    "MsgID" & @TAB & ":" & $Msg & @LF & _
                    "wParam" & @TAB & ":" & $wParam & @LF & _
                    "lParam" & @TAB & ":" & $lParam & @LF & @LF & _
                    "WM_COMMAND - Infos:" & @LF & _
                    "-----------------------------" & @LF & _
                    "Code" & @TAB & ":" & $nNotifyCode & @LF & _
                    "CtrlID" & @TAB & ":" & $nID & @LF & _
                    "CtrlHWnd" & @TAB & ":" & $hCtrl)
        EndIf
        Return 0 ; Only workout clicking on the button
    EndIf
    ; Proceed the default Autoit3 internal message commands.
    ; You also can complete let the line out.
    ; !!! But only 'Return' (without any value) will not proceed
    ; the default Autoit3-message in the future !!!
    Return $GUI_RUNDEFMSG
EndFunc   ;==>MY_WM_COMMAND


; RePost a WM_COMMAND message to a ctrl in a gui window
Func PostButtonclick($hWnd, $nCtrlID)
    DllCall("user32.dll", "int", "PostMessage", _
            "hwnd", $hWnd, _
            "int", $WM_COMMAND, _
            "int", BitAND($nCtrlID, 0x0000FFFF), _
            "hwnd", GUICtrlGetHandle($nCtrlID))
EndFunc   ;==>PostButtonclick


; Draw the button
Func MY_WM_DRAWITEM($hWnd, $Msg, $wParam, $lParam)
    Local $stDrawItem = DllStructCreate("uint;uint;uint;uint;uint;uint;uint;int[4];dword", $lParam)
    Local Const $ODT_BUTTON = 4

    $nCtlType = DllStructGetData($stDrawItem, 1)
    If $nCtlType = $ODT_BUTTON Then
        $nCtrlID = DllStructGetData($stDrawItem, 2)
        $nItemState = DllStructGetData($stDrawItem, 5)
        $hCtrl = DllStructGetData($stDrawItem, 6)
        $hDC = DllStructGetData($stDrawItem, 7)
        $nLeft = DllStructGetData($stDrawItem, 8, 1)
        $nTop = DllStructGetData($stDrawItem, 8, 2)
        $nRight = DllStructGetData($stDrawItem, 8, 3)
        $nBottom = DllStructGetData($stDrawItem, 8, 4)
        $sText = "Ownerdrawn Button" & @LF & "Line 2"
        $nTextColor = 0x5555DD
        $nBackColor = 0xFFEEDD
        DrawButton($hWnd, $hCtrl, $hDC, $nLeft, $nTop, $nRight, $nBottom, $nItemState, $sText, $nTextColor, $nBackColor)
        $stDrawItem = 0
        Return 1
    EndIf

    $stDrawItem = 0
    Return $GUI_RUNDEFMSG ; Proceed the default Autoit3 internal message commands
EndFunc   ;==>MY_WM_DRAWITEM


; The main drawing procedure
Func DrawButton($hWnd, $hCtrl, $hDC, $nLeft, $nTop, $nRight, $nBottom, $nItemState, $sText, $nTextColor, $nBackColor)
    ;Local $bDefault    = FALSE
    Local Const $GWL_STYLE = -16
    Local Const $ODS_SELECTED = 0x0001
    Local Const $ODS_GRAYED = 0x0002
    Local Const $ODS_DISABLED = 0x0004
    Local Const $ODS_CHECKED = 0x0008
    Local Const $ODS_FOCUS = 0x0010
    Local Const $ODS_HOTLIGHT = 0x0040
    Local Const $ODS_INACTIVE = 0x0080
    Local Const $ODS_NOACCEL = 0x0100
    Local Const $ODS_NOFOCUSRECT = 0x0200
    Local Const $DFC_BUTTON = 4
    Local Const $DFCS_BUTTONPUSH = 0x0010
    Local $bChecked = BitAND($nItemState, $ODS_CHECKED)
    Local $bFocused = BitAND($nItemState, $ODS_FOCUS)
    Local $bGrayed = BitAND($nItemState, BitOR($ODS_GRAYED, $ODS_DISABLED))
    Local $bSelected = BitAND($nItemState, $ODS_SELECTED)

    $stRect = DllStructCreate("int;int;int;int")
    DllStructSetData($stRect, 1, $nLeft)
    DllStructSetData($stRect, 2, $nTop)
    DllStructSetData($stRect, 3, $nRight)
    DllStructSetData($stRect, 4, $nBottom)

    If $bGrayed Then
        $nClrTxt = SetTextColor($hDC, GetSysColor($COLOR_HIGHLIGHTTEXT))
    ElseIf $nTextColor = -1 Then
        $nClrTxt = SetTextColor($hDC, GetSysColor($COLOR_BTNTEXT))
    Else
        $nClrTxt = SetTextColor($hDC, $nTextColor)
    EndIf

    If $nBackColor = -1 Then
        $hBrush = GetSysColorBrush($COLOR_BTNFACE)
        $nClrSel = GetSysColor($COLOR_BTNFACE)
    Else
        $hBrush = CreateSolidBrush($nBackColor)
        $nClrSel = $nBackColor;
    EndIf

    $nClrBk = SetBkColor($hDC, $nClrSel)
    $hOldBrush = SelectObject($hDC, $hBrush)

    $nTmpLeft = $nLeft
    $nTmpTop = $nTop
    $nTmpRight = $nRight
    $nTmpBottom = $nBottom

    If $bSelected Then
        InflateRect($nTmpLeft, $nTmpTop, $nTmpRight, $nTmpBottom, -1, -1)
        $hBrushSel = CreateSolidBrush(GetSysColor($COLOR_BTNSHADOW))
        FrameRect($hDC, $nTmpLeft, $nTmpTop, $nTmpRight, $nTmpBottom, $hBrushSel)
        DeleteObject($hBrushSel)
    Else
        If $bFocused And Not $bSelected Then InflateRect($nTmpLeft, $nTmpTop, $nTmpRight, $nTmpBottom, -1, -1)
        DrawFrameControl($hDC, $nTmpLeft, $nTmpTop, $nTmpRight, $nTmpBottom, $DFC_BUTTON, $DFCS_BUTTONPUSH)
    EndIf

    $nTmpLeft = $nLeft
    $nTmpTop = $nTop
    $nTmpRight = $nRight
    $nTmpBottom = $nBottom

    If $bSelected Then
        InflateRect($nTmpLeft, $nTmpTop, $nTmpRight, $nTmpBottom, -2, -2)
    Else
        If $bFocused And Not $bSelected Then
            InflateRect($nTmpLeft, $nTmpTop, $nTmpRight, $nTmpBottom, -3, -3)
            $nTmpLeft -= 1
            $nTmpTop -= 1
        Else
            InflateRect($nTmpLeft, $nTmpTop, $nTmpRight, $nTmpBottom, -2, -2)
            $nTmpLeft -= 1
            $nTmpTop -= 1
        EndIf
    EndIf

    FillRect($hDC, $nTmpLeft, $nTmpTop, $nTmpRight, $nTmpBottom, $hBrush)

    If $bSelected Or $bGrayed Then
        $nTmpLeft = $nTmpLeft + 2
        $nTmpTop = $nTmpTop + 2
    EndIf

    $uFlags = BitOR($DT_NOCLIP, $DT_CENTER, $DT_VCENTER)

    If Not BitAND(GetWindowLong($hCtrl, $GWL_STYLE), $BS_MULTILINE) Then $uFlags = BitOR($uFlags, $DT_SINGLELINE)

    DrawText($hDC, $sText, $nTmpLeft, $nTmpTop+3, $nTmpRight, $nTmpBottom, $uFlags)

    If $bGrayed Then
        $nTmpLeft = $nLeft
        $nTmpTop = $nTop
        $nTmpRight = $nRight
        $nTmpBottom = $nBottom

        $nTmpLeft -= 1

        $nClrTxt = SetTextColor($hDC, GetSysColor($COLOR_GRAYTEXT))
        DrawText($hDC, $sText, $nTmpLeft, $nTmpTop+3, $nTmpRight, $nTmpBottom, BitOR($DT_NOCLIP, $DT_CENTER, $DT_VCENTER, $DT_SINGLELINE))
    EndIf

    $nTmpLeft = $nLeft
    $nTmpTop = $nTop
    $nTmpRight = $nRight
    $nTmpBottom = $nBottom

    If $bFocused Then
        $hBrush = CreateSolidBrush(0)
        FrameRect($hDC, $nTmpLeft, $nTmpTop, $nTmpRight, $nTmpBottom, $hBrush)

        $nTmpLeft = $nLeft
        $nTmpTop = $nTop
        $nTmpRight = $nRight
        $nTmpBottom = $nBottom

        InflateRect($nTmpLeft, $nTmpTop, $nTmpRight, $nTmpBottom, -4, -4)
        DrawFocusRect($hDC, $nTmpLeft, $nTmpTop, $nTmpRight, $nTmpBottom)
    EndIf

    SelectObject($hDC, $hOldBrush)
    DeleteObject($hBrush)
    SetTextColor($hDC, $nClrTxt)
    SetBkColor($hDC, $nClrBk)

    Return 1
EndFunc   ;==>DrawButton


; Some graphic / windows functions
Func CreateSolidBrush($nColor)
    Local $hBrush = DllCall("gdi32.dll", "hwnd", "CreateSolidBrush", "int", $nColor)
    Return $hBrush[0]
EndFunc   ;==>CreateSolidBrush


Func GetSysColor($nIndex)
    Local $nColor = DllCall("user32.dll", "int", "GetSysColor", "int", $nIndex)
    Return $nColor[0]
EndFunc   ;==>GetSysColor


Func GetSysColorBrush($nIndex)
    Local $hBrush = DllCall("user32.dll", "hwnd", "GetSysColorBrush", "int", $nIndex)
    Return $hBrush[0]
EndFunc   ;==>GetSysColorBrush


Func DrawFrameControl($hDC, $nLeft, $nTop, $nRight, $nBottom, $nType, $nState)
    Local $stRect = DllStructCreate("int;int;int;int")

    DllStructSetData($stRect, 1, $nLeft)
    DllStructSetData($stRect, 2, $nTop)
    DllStructSetData($stRect, 3, $nRight)
    DllStructSetData($stRect, 4, $nBottom)

    DllCall("user32.dll", "int", "DrawFrameControl", "hwnd", $hDC, "ptr", DllStructGetPtr($stRect), "int", $nType, "int", $nState)

    $stRect = 0
EndFunc   ;==>DrawFrameControl


Func DrawFocusRect($hDC, $nLeft, $nTop, $nRight, $nBottom)
    Local $stRect = DllStructCreate("int;int;int;int")

    DllStructSetData($stRect, 1, $nLeft)
    DllStructSetData($stRect, 2, $nTop)
    DllStructSetData($stRect, 3, $nRight)
    DllStructSetData($stRect, 4, $nBottom)

    DllCall("user32.dll", "int", "DrawFocusRect", "hwnd", $hDC, "ptr", DllStructGetPtr($stRect))

    $stRect = 0
EndFunc   ;==>DrawFocusRect


Func DrawText($hDC, $sText, $nLeft, $nTop, $nRight, $nBottom, $nFormat)
    Local $nLen = StringLen($sText)

    Local $stRect = DllStructCreate("int;int;int;int")
    DllStructSetData($stRect, 1, $nLeft)
    DllStructSetData($stRect, 2, $nTop)
    DllStructSetData($stRect, 3, $nRight)
    DllStructSetData($stRect, 4, $nBottom)

    Local $stText = DllStructCreate("char[260]")
    DllStructSetData($stText, 1, $sText)

    DllCall("user32.dll", "int", "DrawText", "hwnd", $hDC, "ptr", DllStructGetPtr($stText), "int", $nLen, "ptr", DllStructGetPtr($stRect), "int", $nFormat)

    $stRect = 0
    $stText = 0
EndFunc   ;==>DrawText


Func FillRect($hDC, $nLeft, $nTop, $nRight, $nBottom, $hBrush)
    Local $stRect = DllStructCreate("int;int;int;int")

    DllStructSetData($stRect, 1, $nLeft)
    DllStructSetData($stRect, 2, $nTop)
    DllStructSetData($stRect, 3, $nRight)
    DllStructSetData($stRect, 4, $nBottom)

    DllCall("user32.dll", "int", "FillRect", "hwnd", $hDC, "ptr", DllStructGetPtr($stRect), "hwnd", $hBrush)

    $stRect = 0
EndFunc   ;==>FillRect


Func FrameRect($hDC, $nLeft, $nTop, $nRight, $nBottom, $hBrush)
    Local $stRect = DllStructCreate("int;int;int;int")

    DllStructSetData($stRect, 1, $nLeft)
    DllStructSetData($stRect, 2, $nTop)
    DllStructSetData($stRect, 3, $nRight)
    DllStructSetData($stRect, 4, $nBottom)

    DllCall("user32.dll", "int", "FrameRect", "hwnd", $hDC, "ptr", DllStructGetPtr($stRect), "hwnd", $hBrush)

    $stRect = 0
EndFunc   ;==>FrameRect


Func InflateRect(ByRef $nLeft, ByRef $nTop, ByRef $nRight, ByRef $nBottom, $nX, $nY)
    Local $stRect = DllStructCreate("int;int;int;int")

    DllStructSetData($stRect, 1, $nLeft)
    DllStructSetData($stRect, 2, $nTop)
    DllStructSetData($stRect, 3, $nRight)
    DllStructSetData($stRect, 4, $nBottom)

    DllCall("user32.dll", "int", "InflateRect", "ptr", DllStructGetPtr($stRect), "int", $nX, "int", $nY)

    $nLeft = DllStructGetData($stRect, 1)
    $nTop = DllStructGetData($stRect, 2)
    $nRight = DllStructGetData($stRect, 3)
    $nBottom = DllStructGetData($stRect, 4)

    $stRect = 0
EndFunc   ;==>InflateRect


Func SetBkColor($hDC, $nColor)
    Local $nOldColor = DllCall("gdi32.dll", "int", "SetBkColor", "hwnd", $hDC, "int", $nColor)
    Return $nOldColor[0]
EndFunc   ;==>SetBkColor


Func SetTextColor($hDC, $nColor)
    Local $nOldColor = DllCall("gdi32.dll", "int", "SetTextColor", "hwnd", $hDC, "int", $nColor)
    Return $nOldColor[0]
EndFunc   ;==>SetTextColor


Func SelectObject($hDC, $hObj)
    Local $hOldObj = DllCall("gdi32.dll", "hwnd", "SelectObject", "hwnd", $hDC, "hwnd", $hObj)
    Return $hOldObj[0]
EndFunc   ;==>SelectObject


Func DeleteObject($hObj)
    Local $nResult = DllCall("gdi32.dll", "hwnd", "DeleteObject", "hwnd", $hObj)
EndFunc   ;==>DeleteObject


Func GetWindowLong($hWnd, $nIndex)
    Local $nVal = DllCall("user32.dll", "int", "GetWindowLong", "hwnd", $hWnd, "int", $nIndex)
    Return $nVal[0]
EndFunc   ;==>GetWindowLong

 

[kcvinu]

@funkey 

Thanks for your detailed reply. I am stumbled upon the fact that we cant change the back color without using OWNERDRAW style. Then how does the visual studio changes the control colors when we change the color from the property window ? And there is an OWNERDRAW style in visual studio which we dont need to enable for our button to work.  

[Melba23]

kcvinu,

AutoIt itself uses a "hack" to get the button colour to change using GUICtrlSetBkColor - which has lead to all sorts of problems as you can see from the final comment in this Trac ticket from a long time ago.

M23

[kcvinu]

@Melba23 ,

Hi, i saw that.