[SDL] Tom Wilson or every friend help me
t.wilson at hazid.com
Sun Jul 17 03:18:20 PDT 2005
> Hi every friend:
> I have a trouble that when I draw SDL surface onto MFC Control ,I cant get message from the control such as
> WM_LBUTTONDOWN and WM_MOUSEMOVE , how can let the control receive it's message after SDL surface mask on it.
> The way draw surface is take from Tom Wilson's SDLChildWindow demo .
> thank Tom Wilson and thank every friends!
You need to make your own WndProc that forwards these messages to the
button. As the SDL child window is On-top of the button and receives
You need to somehow get the handle of the button. Lets call this hwndButton.
so, for example:
LRESLUT WINAPI ForwardingProc(HWND window, UINT msg, WPARAM wParam,
return ::SendMessage(hwndButton, msg, wParam, lParam);
And then the child window can be told about this function with the function:
SDL_ChildWindow::set_user_proc(LRESULT (*usr_proc)(HWND hwnd_from, UINT
message, WPARAM wParam, LPARAM lParam));
However, your forwarding proc cannot be a class member. This is a bad
limitation. I soon realised this method is extremely rubbish. So I have
some code that uses the current window and will not stop the messages
getting through to the window. It's much simplified.
I will post this code on my web site later today and re-do the
description text on the SDL web site. I will probably remove the old
(I have been meaning to do this for about 2 years! :-) )
I'll let you know when it's all packaged up.
> Jack xuji
> xuji at hz.cn
> SDL mailing list
> SDL at libsdl.org
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