Re: [AD] mouse focus @ create Window time bug

[AJ <aj@xxxxxxxxxx>]

AJ wrote:
> AJ wrote:
>
> > http://www.allegro.cc/forums/view_thread.php?_id=476898
> >
> > this thread on a.cc  seems to have found a fix for the mouse focus at 
> > createWindow time  issue.
> >
> > the problem is the mouse & keyb  does not work if the window has not 
> > got the focus when the CreateWindow() is called.
>
>
>
> /docs/src/win/wkeyb.c  line 553:
> hr = IDirectInputDevice_SetCooperativeLevel(key_dinput_device, 
> allegro_wnd, DISCL_FOREGROUND | DISCL_NONEXCLUSIVE);
>
> passes the  allego_wnd  which gets set by  create_directx_window()
>
> even the /examples/exmouse.c  attempts to init_keyb before it creates 
> the window.  so the allegro_wnd  is probably NULL when that
> IDirectInputDevice_SetCooperativeLevel() occurs.
>
> whether this has anything to do with this focus bug, i have no idea.



maybe we could add an ASSERT()


from MSDN:
HRESULT SetCooperativeLevel( HWND hwnd, DWORD dwFlags );

hwnd:  Window handle to be associated with the device. This parameter 
must be a valid top-level window handle that belongs to the process. The 
window associated with the device must not be destroyed while it is 
still active in a Microsoft DirectInput device.








here is another function that appears to be VERY relevant in this problem:

from this document:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/enablewindow.asp






here are some notes from MSDN that may be relevant for this bug:

from 
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/windows/windowreference/windowfunctions/createwindowex.asp

Windows 2000/XP: The WS_EX_NOACTIVATE value for dwExStyle prevents 
foreground activation by the system. To prevent queue activation when 
the user clicks on the window, you must process the WM_MOUSEACTIVATE 
message appropriately. To bring the window to the foreground or to 
activate it programmatically, use SetForegroundWindow or 
SetActiveWindow. Returning FALSE to WM_NCACTIVATE prevents the window 
from losing queue activation. However, the return value is ignored at 
activation time.