On 5/22/2013 8:49 PM, evilrat wrote:
On Wednesday, 22 May 2013 at 21:42:32 UTC, D-sturbed wrote:
Yes I'm in the "multiple Window case", every window is wraped in a
class and has its own message handler. I know that Win, in its
callback system, often lets you retrieve a pointer to something, and I
haven't get it was possible in this case...(which is you seem to
describe). I will try this tomorrow.
you can't really make it without static wndproc. if you don't know how
to do it just go google some wndproc in a class tutors for c++, i can
even recommend you one(i had used my own port of this in D before i
switched to crossplatform lib for my needs) -
http://blogs.msdn.com/b/oldnewthing/archive/2005/04/22/410773.aspx
I had a partial port of WTL over to D which worked well enough for what
I needed, the core of the WndProc handling is down below. Each HWND is
owned by the thread it was created on, so assigning it into D
associative array (which is thread local) can do the trick. It involved
a hack, before any call to the Win32 CreateWindow/CreateWindowEx APIs,
to capture the association with the new HWND and to remove them when
they get cleaned up. There is probably a better way but this worked
enough to get started, and should work with multiple windows reasonably
well.
CWindowInterface g_CreatingWindow;
CWindowInterface[HWND] g_HWNDtoObject;
extern (Windows)
int CWindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
int WindowProcReturnValue = 0;
/*
auto EventMsg = appender!string();
formattedWrite(EventMsg, "EventMsg (hWnd=%1$s) (uMsg=%2$s)
(wParam=%3$s) (lParam=%4$s)\n", cast(DWORD)hWnd, cast(DWORD)uMsg,
cast(DWORD)wParam, cast(DWORD)lParam);
OutputDebugString(toUTFz!(const(wchar)*)(EventMsg.data));
*/
if (g_CreatingWindow)
{
g_HWNDtoObject[hWnd] = g_CreatingWindow;
g_CreatingWindow = null;
}
auto Window = g_HWNDtoObject[cast(HANDLE)hWnd];
if (Window is null)
{
WindowProcReturnValue = DefWindowProc(hWnd, uMsg, wParam, lParam);
}
else
{
WindowProcReturnValue = Window.WindowProc(hWnd, uMsg, wParam,
lParam);
}
if (uMsg == WM_NCDESTROY)
{
g_HWNDtoObject.remove(hWnd);
}
return WindowProcReturnValue;
}
