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Acmlm's Board - I2 Archive - Programming - Window DCs getting mixed up, or something...

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HyperLamer
<||bass> and this was the soloution i thought of that was guarinteed to piss off the greatest amount of people

Sesshomaru
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Since: 03-15-04
From: Canada, w00t!
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Posted on 06-11-05 09:11 AM

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Image (102K, 546x586)

If you can pull your eyes away from my desktop long enough

you'll notice a small inconsitency in the numbering of these 10 pink squares, each of which is a window. For some reason which seems to defy all logic, the code that numbers them is simply skipping this window, no matter how many I create (though less than that works fine); drawing a black spot but no number, and somehow not even incrementing the number.

First I register a default window class:

//Create a default window class
	sprintf(WindowClassName,"DESKTOP_GADGETS");

	WindowClass.cbSize = sizeof(WNDCLASSEX); //Struct size (don't fuck with)
	WindowClass.style = CS_DBLCLKS | CS_OWNDC | CS_HREDRAW | CS_VREDRAW; //Style flags
	WindowClass.lpfnWndProc = ProcMessage; //Message handler
	WindowClass.cbClsExtra = 0; //Extra junk
	WindowClass.cbWndExtra = 0; //Extra junk
	WindowClass.hInstance = hInst; //Program handle (don't fuck with)
	WindowClass.hIcon = LoadIcon(NULL, IDI_WINLOGO); //Default icon
	WindowClass.hCursor = LoadCursor(NULL, IDC_ARROW); //Default cursor
	WindowClass.hbrBackground = WindowBrush; //Default brush
	WindowClass.lpszMenuName = NULL; //No menu
	WindowClass.lpszClassName = WindowClassName; //Class name
	WindowClass.hIconSm = LoadIcon(NULL, IDI_WINLOGO); //Taskbar icon

	//Register the window
	if(!RegisterClassEx(&WindowClass)) Die("RegisterClassEx() failed" LINENUM);
	DebugOut(DO_ALL,"Registered default window class\n");

Then create 10 windows using it:

int q;
	for(q=0;q<10;q++)
	{
		NewWindow(-1,-1,NULL,50,q*60,50,50,"Test");
		DrawString(WindowInfo[q].hDC,20,20,false,"%d",q);
		//Sleep(500);
		ProcessMessages();
	}
void ProcessMessages()
{
	MSG msgMessage; //Window message
	for(CurrentWindow=0;CurrentWindow<NumWindows;CurrentWindow++)
	{
		if(PeekMessage(&msgMessage,WindowInfo[CurrentWindow].hWnd,0,0,PM_REMOVE))
		{
			//Yes, send it off
			TranslateMessage(&msgMessage);
			DispatchMessage(&msgMessage);
		}
		if(WindowInfo[CurrentWindow].IsMoving)
		{
			GetCursorPos(&point);
			rect.left = point.x - WindowInfo[CurrentWindow].MouseOffset.x;
			rect.top = point.y - WindowInfo[CurrentWindow].MouseOffset.y;
			Window_SetPos(WindowInfo[CurrentWindow].hWnd,rect.left,rect.top);
		}
	}
}

HWND NewWindow(DWORD Style,DWORD ExStyle,HBRUSH BGBrush,int x, int y, int w, int h, char* Title)
{
	if(NumWindows >= sizeof(WindowInfo))
	{
		DebugOut(DO_MINOR,"Cannot create any more windows\n");
		return 0;
	}

	DWORD e,s;
	if(Style == -1) s = (WS_CHILD | WS_POPUP | WS_VISIBLE); else s = Style;
	if(ExStyle == -1) e = 0; else e = ExStyle;

	//Create the window
	WindowInfo[NumWindows].hWnd = CreateWindowEx(
		e, /* Extended styles*/
		"DESKTOP_GADGETS", /* Class name again */
		Title, /* Title */
		s, /* Window style flags */
		x, y, w, h, /* Position and size */
		hDesktop, /* Parent window handle (desktop) */
		NULL, /* Menu handle (none) */
		hInst, /* Program handle (don't fuck with) */
		NULL); /* Parameter */

	WindowInfo[NumWindows].hDC = GetDC(WindowInfo[NumWindows].hWnd);
	DebugOut(DO_STATUS,"Created window '%s' (#%d); hWnd=0x%08X, hDC=0x%08X\n",
		Title,
		NumWindows,
		WindowInfo[NumWindows].hWnd,
		WindowInfo[NumWindows].hDC);
	NumWindows++;
}

DrawString() simply processes the string and draws it on a given DC. Somehow, though, this specific window is getting skipped.

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Acmlm's Board - I2 Archive - Programming - Window DCs getting mixed up, or something...

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