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[C++/winapi] unresponsive window

Started by Trillian Jul 7, 2006 at 11:36 AM 3 replies 500+ views

Original Post

Jul 7, 2006 at 11:36 AM

Hello! Up to today I thought I mastered basic window creation with winapi but it looks like I was wrong. I'm currently building a library to simplify the use of windows. Using it, I can have my main loop code as easy as this :


// Sample of simplified code
while(_Running)
{
	if(_Window.HandleMessages()) continue;
	_Timer.FrameUpdate();
	if(!_Window.IsActive()) continue;

	Update(_Timer.GetTimeDelta());
	Render();
}

// Implementation of CWindow::HandleMessages()
bool CWindow::HandleMessages()
{
	MSG msg;

	if(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
		return true;
	}

	return false; // No messages were treaten
}

Now I'm having a window but it is unresponsive and I have to close it using CTRL-ALT-DELETE. Do I need to do more than what I currently do for my window to be responsive? Thanks for your help! (If I didn't post enough code, please tell me)

Smit

Jul 7, 2006 at 11:39 AM

Do you call DefWindowProc( ) in your Window Procedure function for messages that you arn't handling?

Trillian

Author

Trillian

Jul 7, 2006 at 11:42 AM

I've just step-by-stepped my program and yes, some messages go to the DefWindowProc

Trillian

Author

Trillian

Jul 7, 2006 at 11:47 AM

Here's more code : the static window procedure and the member one :

LRESULT FEWW::CWindow::StaticProcedure(HWND hwnd,UINT msg, WPARAM wparam, LPARAM lparam){	if(!s_ProcessMessages) return DefWindowProc(hwnd, msg, wparam, lparam);	// Get CWindow object	CWindow * win = (CWindow*)GetWindowLong(hwnd, GWL_USERDATA);		// If we cannot find the CWindow object, use DefWindowProc	if(win == NULL) return DefWindowProc(hwnd, msg, wparam, lparam);	// We've found the CWindow object, send him the message	else return win->Procedure(hwnd, msg, wparam, lparam);}LRESULT FEWW::CWindow::Procedure(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam){	if( MessageToListener(*this, hwnd, msg, wparam, lparam ) ) return 0;	else return DefWindowProc(hwnd,msg,wparam,lparam);}

I've implemented a "listener" abstract class for windows messages. MessageToListener takes a window message as an argument and calls appropriate listener function depending on the window message. If it doesn't treat the message, it return false.

Trillian

Author

Trillian

Jul 7, 2006 at 12:19 PM

[solved] by playing around with settings

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