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I'm a spammer
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Joined: 18 Apr 2007
Posts: 5094
Location: Israel.
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 Posted: Thu Jun 26, 2008 7:26 pm Post subject: [C++]GroupBox messages |
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From some reason I don't get messages from group box child windows. =|
I hate calling ChildWindowFromPoint, which I used last time I used a group box, so I tried calling SetWindowLong with the 2nd parameter being GWL_WNDPROC, but then its not even shown... (tried sending WM_CREATE messages or calling ShowWindow, nothing...  )
My code..:
| Code: | LRESULT CALLBACK Test(HWND hwnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
switch (Msg)
{
...
...
}
return DefWindowProc(hwnd, Msg, wParam, lParam);
}
...
...
...
SetWindowLongA(GroupWnd, GWL_WNDPROC, (LONG)&Test); |
Is there anything wrong in here? |
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atom0s
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| Posted: Thu Jun 26, 2008 8:09 pm Post subject: |
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Firstly, use SetWindowLongPtr.
| Quote: | | Note This function has been superseded by the SetWindowLongPtr function. To write code that is compatible with both 32-bit and 64-bit versions of Microsoft Windows, use the SetWindowLongPtr function. |
Next you don't need &. You can use (LONG)(LONG_PTR) to remove warnings if you wish like this:
| Code: | | lpOldWndProc = (WNDPROC)(LONG_PTR)SetWindowLongPtr(hWnd, GWL_WNDPROC, (LONG)(LONG_PTR)WndProc); |
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I'm a spammer
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| Posted: Fri Jun 27, 2008 6:03 am Post subject: |
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Its still not working.
Edit:
| Code: | | #define SetWindowLongPtrW SetWindowLongW |
Weird, I can't see the group box but I can see the child windows... =\ |
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atom0s
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I'm a spammer
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Joined: 18 Apr 2007
Posts: 5094
Location: Israel.
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| Posted: Fri Jun 27, 2008 10:15 pm Post subject: |
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Ok.
But do you have any idea what the group box isn't redrawing itself?
I tried calling SetWindowLong after the group box was created and drawn, but then it never got WM_PAINT/WM_DRAWITEM message, and when I moved a window over it, well, it disappeared ofcourse... 
I tried sending the message to both parent window and group box window, nither worked... |
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atom0s
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Reputation: 205
Joined: 25 Jan 2006
Posts: 8587
Location: 127.0.0.1
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| Posted: Fri Jun 27, 2008 10:32 pm Post subject: |
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Try using BeginPaint and EndPaint, and then InvalidateRect / RedrawWindow.
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