GUI Resizing Flicker

[danielkza]

Everytime i resize a GUI Window it flickers horribly,it's so evident it becomes annoying.Here's the GUI creation code

$MainForm = GUICreate($WindowTitle, 701, 481, 265, 145,BitOR($WS_MINIMIZEBOX, $WS_MAXIMIZEBOX,$WS_CAPTION, $WS_POPUP, $WS_SIZEBOX))

I'm doing something wrong or is it a native AU3 problem?

[rasim]

Everytime i resize a GUI Window it flickers horribly,it's so evident it becomes annoying.Here's the GUI creation code

$MainForm = GUICreate($WindowTitle, 701, 481, 265, 145,BitOR($WS_MINIMIZEBOX, $WS_MAXIMIZEBOX,$WS_CAPTION, $WS_POPUP, $WS_SIZEBOX))

I'm doing something wrong or is it a native AU3 problem?

What exactly flickering? GUI window or items? If items is flickering, that this is normal behavior. I run a mspaint program and when i do resize the mspaint window all items flickering.

[danielkza]

What exactly flickering? GUI window or items? If items is flickering, that this is normal behavior. I run a mspaint program and when i do resize the mspaint window all items flickering.

Resize windows explorer,for example,and you'll see: no flicker at all.That's what's like with most windows.

I've got another issue with resizing:I have a Pic Control that gets resized within the GUI.When i resize it,the picture resizes too.But when i change/set the picture again,it changes back to the original size,not even the picture size.Is that a AU3 bug or do i need a message hook or something to to it myself?

Edited April 10, 2008 by danielkza

[martin]

Resize windows explorer,for example,and you'll see: no flicker at all.That's what's like with most windows.

Use the extended window style $WS_EX_COMPOSITED and the flickering will go away.

Const $WS_EX_COMPOSITED = 0x2000000

I've got another issue with resizing:I have a Pic Control that gets resized within the GUI.When i resize it,the picture resizes too.But when i change/set the picture again,it changes back to the original size,not even the picture size.Is that a AU3 bug or do i need a message hook or something to to it myself?

Maybe before you set the pic again find out what it's current size is and set the size to that after changing the image.

[danielkza]

Use the extended window style $WS_EX_COMPOSITED and the flickering will go away.

Const $WS_EX_COMPOSITED = 0x2000000

The flicker is gone,but also is the window structure.The backgroud is transparent now.

Maybe before you set the pic again find out what it's current size is and set the size to that after changing the image.

I tried that,but ControlMove messes the pictures up.

[rasim]

Add a $WS_CLIPCHILDREN style:

#include <GuiConstants.au3>

$hGUI = GUICreate("Test GUI", 300, 200, -1, -1, _
BitOR($WS_MINIMIZEBOX, $WS_MAXIMIZEBOX,$WS_CAPTION, $WS_POPUP, $WS_SIZEBOX, $WS_CLIPCHILDREN))

$hPic = GUICtrlCreatePic(@SystemDir & "\setup.bmp", 0, 0, 300, 200)
GUICtrlSetResizing(-1, $GUI_DOCKAUTO)
GUICtrlSetState(-1, $GUI_DISABLE)

GUISetState()

Do
Until GUIGetMsg() = $GUI_EVENT_CLOSE

[rasim]

Hmm... interesting problem. I try to use double buffering, but GUI still fickering

expandcollapse popup

#include <GuiConstants.au3>
#include <WinAPI.au3>

$hGUI = GUICreate("Test GUI", 300, 200, -1, -1, _
BitOR($WS_MINIMIZEBOX, $WS_MAXIMIZEBOX,$WS_CAPTION, $WS_POPUP, $WS_SIZEBOX))

$hPic = GUICtrlCreatePic(@SystemDir & "\setup.bmp", 0, 0, 300, 200)
GUICtrlSetResizing(-1, $GUI_DOCKAUTO)
GUICtrlSetState(-1, $GUI_DISABLE)

GUIRegisterMsg($WM_PAINT, "WM_PAINT")

GUISetState()

Do
Until GUIGetMsg() = $GUI_EVENT_CLOSE

Func WM_PAINT($hWnd, $Msg, $wParam, $lParam)
    Local $PAINTSTRUCT = DllStructCreate("hwnd hdc;int fErase;dword rcPaint[4];int fRestore;int fIncUpdate;byte rgbReserved[32]")
    
    Local $hDC = DllCall("user32.dll", "hwnd", "BeginPaint", "hwnd", $hWnd, "ptr", DllStructGetPtr($PAINTSTRUCT))
    $hDC = $hDC[0]
    
    Local $win_width = DllStructGetData($PAINTSTRUCT, "rcPaint", 3)
    Local $win_height = DllStructGetData($PAINTSTRUCT, "rcPaint", 4)
    
    Local $hdcMem = _WinAPI_CreateCompatibleDC($hDC)
    Local $hbmMem = _WinAPI_CreateCompatibleBitmap($hDC, $win_width, $win_height)
    Local $hOld = _WinAPI_SelectObject($hdcMem, $hbmMem)
    
    _WinAPI_BitBlt($hDC, 0, 0, $win_width, $win_height, $hdcMem, 0, 0, $SRCCOPY)
    
    _WinAPI_SelectObject($hdcMem, $hOld)
    _WinAPI_DeleteObject($hbmMem)
    _WinAPI_DeleteDC($hdcMem)
    DllCall("user32.dll", "int", "EndPaint", "hwnd", $hDC, "ptr", DllStructGetPtr($PAINTSTRUCT))
    
    Return $GUI_RUNDEFMSG
EndFunc