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TechnoGoth

Problem with Reusable Window Class

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I''m having two problem with my reusable window class 1)I can''t move, resize, or close the window or messageboxs. I can exit the program using a quit button. 2)An error message appears after exiting the application The two problems may be related I''m not sure. I''m pretty sure that the problem is with, either the windows create or the message handler.
/*	This Code Creates Our OpenGL Window.  Parameters Are:					*
 *	title			- Title To Appear At The Top Of The Window				*
 *	width			- Width Of The GL Window Or Fullscreen Mode				*
 *	height			- Height Of The GL Window Or Fullscreen Mode			*
 *	bits			- Number Of Bits To Use For Color (8/16/24/32)			*
 *	fullscreenflag	- Use Fullscreen Mode (TRUE) Or Windowed Mode (FALSE)	*/
 
BOOL PhenGu::CreateGLWindow(char* title, int width, int height, int bits, bool fullscreenflag)
{
	GLuint		PixelFormat;			// Holds The Results After Searching For A Match

//	WNDCLASS	wc;						// Windows Class Structure

	DWORD		dwExStyle;				// Window Extended Style

	DWORD		dwStyle;				// Window Style

	RECT		WindowRect;				// Grabs Rectangle Upper Left / Lower Right Values

	WindowRect.left=(long)0;			// Set Left Value To 0

	WindowRect.right=(long)width;		// Set Right Value To Requested Width

	WindowRect.top=(long)0;				// Set Top Value To 0

	WindowRect.bottom=(long)height;		// Set Bottom Value To Requested Height


	fullscreen=fullscreenflag;			// Set The Global Fullscreen Flag


	hInstance			= GetModuleHandle(NULL);				// Grab An Instance For Our Window

	wc.style			= CS_HREDRAW | CS_VREDRAW | CS_OWNDC;	// Redraw On Size, And Own DC For Window.

	wc.lpfnWndProc		= (WNDPROC) WndProc;					// WndProc Handles Messages

	wc.cbClsExtra		= 0;									// No Extra Window Data

	wc.cbWndExtra		= 0;									// No Extra Window Data

	wc.hInstance		= hInstance;							// Set The Instance

	wc.hIcon			= LoadIcon(NULL, IDI_WINLOGO);			// Load The Default Icon

	wc.hCursor			= LoadCursor(NULL, IDC_ARROW);			// Load The Arrow Pointer

	wc.hbrBackground	= NULL;									// No Background Required For GL

	wc.lpszMenuName		= NULL;									// We Don''t Want A Menu

	wc.lpszClassName	= "OpenGL";								// Set The Class Name


	if (!RegisterClass(&wc))									// Attempt To Register The Window Class

	{
		MessageBox(NULL,"Failed To Register The Window Class.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;											// Return FALSE

	}
	
	if (fullscreen)												// Attempt Fullscreen Mode?

	{
		DEVMODE dmScreenSettings;								// Device Mode

		memset(&dmScreenSettings,0,sizeof(dmScreenSettings));	// Makes Sure Memory''s Cleared

		dmScreenSettings.dmSize=sizeof(dmScreenSettings);		// Size Of The Devmode Structure

		dmScreenSettings.dmPelsWidth	= width;				// Selected Screen Width

		dmScreenSettings.dmPelsHeight	= height;				// Selected Screen Height

		dmScreenSettings.dmBitsPerPel	= bits;					// Selected Bits Per Pixel

		dmScreenSettings.dmFields=DM_BITSPERPEL|DM_PELSWIDTH|DM_PELSHEIGHT;

		// Try To Set Selected Mode And Get Results.  NOTE: CDS_FULLSCREEN Gets Rid Of Start Bar.

		if (ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN)!=DISP_CHANGE_SUCCESSFUL)
		{
			// If The Mode Fails, Offer Two Options.  Quit Or Use Windowed Mode.

			if (MessageBox(NULL,"The Requested Fullscreen Mode Is Not Supported By\nYour Video Card. Use Windowed Mode Instead?","NeHe GL",MB_YESNO|MB_ICONEXCLAMATION)==IDYES)
			{
				fullscreen=FALSE;		// Windowed Mode Selected.  Fullscreen = FALSE

			}
			else
			{
				// Pop Up A Message Box Letting User Know The Program Is Closing.

				MessageBox(NULL,"Program Will Now Close.","ERROR",MB_OK|MB_ICONSTOP);
				return FALSE;									// Return FALSE

			}
		}
	}

	if (fullscreen)												// Are We Still In Fullscreen Mode?

	{
		dwExStyle=WS_EX_APPWINDOW;								// Window Extended Style

		dwStyle=WS_POPUP;										// Windows Style

		ShowCursor(TRUE);										// Hide Mouse Pointer

	}
	else
	{
		dwExStyle=WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;			// Window Extended Style

		dwStyle=WS_OVERLAPPEDWINDOW;							// Windows Style

	}

	AdjustWindowRectEx(&WindowRect, dwStyle, FALSE, dwExStyle);		// Adjust Window To True Requested Size

   // GameInit();

      	// Create The Window

	if (!(hWnd=CreateWindowEx(	dwExStyle,							// Extended Style For The Window

								"OpenGL",							// Class Name

								title,								// Window Title

								dwStyle |							// Defined Window Style

								WS_CLIPSIBLINGS |					// Required Window Style

								WS_CLIPCHILDREN,					// Required Window Style

								0, 0,								// Window Position

								WindowRect.right-WindowRect.left,	// Calculate Window Width

								WindowRect.bottom-WindowRect.top,	// Calculate Window Height

								NULL,								// No Parent Window

								NULL,								// No Menu

								hInstance,							// Instance

								(void *) this)))								// Dont Pass Anything To WM_CREATE

	{
		KillGLWindow();								// Reset The Display

		MessageBox(NULL,"Window Creation Error.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE

	}

	static	PIXELFORMATDESCRIPTOR pfd=				// pfd Tells Windows How We Want Things To Be

	{
		sizeof(PIXELFORMATDESCRIPTOR),				// Size Of This Pixel Format Descriptor

		1,											// Version Number

		PFD_DRAW_TO_WINDOW |						// Format Must Support Window

		PFD_SUPPORT_OPENGL |						// Format Must Support OpenGL

		PFD_DOUBLEBUFFER,							// Must Support Double Buffering

		PFD_TYPE_RGBA,								// Request An RGBA Format

		bits,										// Select Our Color Depth

		0, 0, 0, 0, 0, 0,							// Color Bits Ignored

		0,											// No Alpha Buffer

		0,											// Shift Bit Ignored

		0,											// No Accumulation Buffer

		0, 0, 0, 0,									// Accumulation Bits Ignored

		16,											// 16Bit Z-Buffer (Depth Buffer)  

		0,											// No Stencil Buffer

		0,											// No Auxiliary Buffer

		PFD_MAIN_PLANE,								// Main Drawing Layer

		0,											// Reserved

		0, 0, 0										// Layer Masks Ignored

	};
	
	if (!(hDC=GetDC(hWnd)))							// Did We Get A Device Context?

	{
		KillGLWindow();								// Reset The Display

		MessageBox(NULL,"Can''t Create A GL Device Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE

	}

	if (!(PixelFormat=ChoosePixelFormat(hDC,&pfd)))	// Did Windows Find A Matching Pixel Format?

	{
		KillGLWindow();								// Reset The Display

		MessageBox(NULL,"Can''t Find A Suitable PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE

	}

	if(!SetPixelFormat(hDC,PixelFormat,&pfd))		// Are We Able To Set The Pixel Format?

	{
		KillGLWindow();								// Reset The Display

		MessageBox(NULL,"Can''t Set The PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE

	}

	if (!(hRC=wglCreateContext(hDC)))				// Are We Able To Get A Rendering Context?

	{
		KillGLWindow();								// Reset The Display

		MessageBox(NULL,"Can''t Create A GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE

	}

	if(!wglMakeCurrent(hDC,hRC))					// Try To Activate The Rendering Context

	{
		KillGLWindow();								// Reset The Display

		MessageBox(NULL,"Can''t Activate The GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE

	}

	ShowWindow(hWnd,SW_SHOW);						// Show The Window

	SetForegroundWindow(hWnd);						// Slightly Higher Priority

	SetFocus(hWnd);									// Sets Keyboard Focus To The Window

	ReSizeGLScene(width, height);					// Set Up Our Perspective GL Screen


	if (!InitGL())									// Initialize Our Newly Created GL Window

	{
		KillGLWindow();								// Reset The Display

		MessageBox(NULL,"Initialization Failed.","ERROR",MB_OK|MB_ICONEXCLAMATION);
		return FALSE;								// Return FALSE

	}

  
	return TRUE;									// Success

}

LRESULT CALLBACK PhenGu::WndProc(HWND	hWnd,			// Handle For This Window

							UINT	uMsg,			// Message For This Window

							WPARAM	wParam,			// Additional Message Information

							LPARAM	lParam)			// Additional Message Information

{

    PhenGu * pgWnd= NULL;
    bool proccessed=false;
	switch (uMsg)									// Check For Windows Messages

	{
	  case WM_NCCREATE:
	  {
	     SetWindowLong (hWnd, GWL_USERDATA,
                          (long)((LPCREATESTRUCT(lParam))->lpCreateParams));               
	     break;
      }
    default:
    {
       pgWnd = (PhenGu * ) GetWindowLong(hWnd, GWL_USERDATA);
       if(pgWnd != NULL)
       {
         proccessed=pgWnd->messageHandler(uMsg, wParam, lParam);
       }
       break;
    }
    }
    if(proccessed==false)
    {
      return DefWindowProc(hWnd,uMsg,wParam,lParam);
    }
   return 0;
}
int PhenGu::messageHandler(	  		// Handle For This Window

							UINT	uMsg,			// Message For This Window

							WPARAM	wParam,			// Additional Message Information

							LPARAM	lParam)			// Additional Message Information

{
	switch (uMsg)									// Check For Windows Messages

	{

   	   case WM_ACTIVATE:							// Watch For Window Activate Message

	 	{
			if (!HIWORD(wParam))					// Check Minimization State

			{
				active=TRUE;						// Program Is Active

			}
			else
			{
				active=FALSE;						// Program Is No Longer Active

			}

			return 0;								// Return To The Message Loop

		}
     	case WM_SYSCOMMAND:							// Intercept System Commands

		{
			switch (wParam)							// Check System Calls

			{
				case SC_SCREENSAVE:					// Screensaver Trying To Start?

				case SC_MONITORPOWER:				// Monitor Trying To Enter Powersave?

				return 0;							// Prevent From Happening

			}
			break;									// Exit

		}

		case WM_CLOSE:								// Did We Receive A Close Message?

		{
			PostQuitMessage(0);						// Send A Quit Message

			return 0;								// Jump Back

		}
		case WM_KEYDOWN:							// Is A Key Being Held Down?

		{
		 
		//	keys[wParam] = TRUE;					// If So, Mark It As TRUE

		//	return 0;								// Jump Back

		 switch (wParam)
           {                  
           // arrow keys

            case VK_UP:
			{
				 updateSprite(0,1);
				 spalCX=spalU;
				 spF=0;
				 if(spalCY==spalT)
				   spalCY=spalB;
		         else
     	           spalCY=spalT;
	            break;
			}
			case VK_DOWN:
			{	
   				 updateSprite(0,-1);
                 spalCX=spalD;
                 spF=25;
                 if(spalCY==spalT)
				   spalCY=spalB;
		         else
     	           spalCY=spalT;	            
               break;
			}
			case VK_RIGHT:
			{
				 updateSprite(1,0);				 
                  spalCX=spalR;
                   spF=75;
				  if(spalCY==spalT)
				   spalCY=spalB;
		         else
     	           spalCY=spalT;
 	            break;
			}
			case VK_LEFT:
			{
                  updateSprite(-1,0);				   
                   spalCX=spalL;
                    spF=50;
				   if(spalCY==spalT)
				   spalCY=spalB;
		         else
     	           spalCY=spalT;
	            break;
			}
			//action keys

			case ''X'':
			{
              objectInteract();
	            break;
			}
			case VK_F1:						// Is F1 Being Pressed?

			{
				//keys[VK_F1]=FALSE;					// If So Make Key FALSE

				KillGLWindow();						// Kill Our Current Window

				fullscreen=!fullscreen;				// Toggle Fullscreen / Windowed Mode

				// Recreate Our OpenGL Window

				if (!CreateGLWindow("Warmonger",800,600,16,fullscreen))
				{
					return 0;						// Quit If Window Was Not Created

				}
				break;
		 
     	}
			case VK_ESCAPE:	// Active?  Was There A Quit Received?

			{
				done=TRUE;							// ESC or DrawGLScene Signalled A Quit

			    break;
               }
  	      }
        }

		case WM_KEYUP:								// Has A Key Been Released?

		{
			keys[wParam] = FALSE;					// If So, Mark It As FALSE

			return 0;								// Jump Back

		}

		case WM_SIZE:								// Resize The OpenGL Window

		{
			ReSizeGLScene(LOWORD(lParam),HIWORD(lParam));  // LoWord=Width, HiWord=Height

			return 0;								// Jump Back

		}
		
		 case WM_LBUTTONDOWN: // left mouse button up. stops looking and dragging.

         {            
           //mouse_pos  = GetMousePosition(LOWORD(lParam), HIWORD(lParam), drag_depth);

             selectObject(LOWORD(lParam),HIWORD(lParam));
             return 0;
         }
         
 		 case WM_LBUTTONUP: // left mouse button up. stops looking and dragging.

 		 {
 		   etButton_p=false;
 		   return 0;
	     }
	}

	// Pass All Unhandled Messages To DefWindowProc

	return DefWindowProc(hWnd,uMsg,wParam,lParam);
}


LRESULT PhenGu::run()
{
  //  DrawGLScreen();

	while(!done)									// Loop That Runs While done=FALSE

	{
		if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))	// Is There A Message Waiting?

		{
			if (msg.message==WM_QUIT)				// Have We Received A Quit Message?

			{
				done=TRUE;							// If So done=TRUE

			}
			else									// If Not, Deal With Window Messages

			{
				TranslateMessage(&msg);				// Translate The Message

				DispatchMessage(&msg);				// Dispatch The Message

			}
		}
		else										// If There Are No Messages

		{
			// Draw The Scene.  Watch For ESC Key And Quit Messages From DrawGLScene()

  		if ((active && !DrawGLScreen()) || keys[VK_ESCAPE])//!DrawGLMap() && !DrawGLArmy()	// Active?  Was There A Quit Received?

          {
				done=TRUE;							// ESC or DrawGLScene Signalled A Quit

          }
	    else									// Not Time To Quit, Update Screen

	      {
				SwapBuffers(hDC);					// Swap Buffers (Double Buffering)

		  }
		}
	}

	// Shutdown

//	KillGLWindow();									// Kill The Window

	return (msg.wParam);							// Exit The Program

}
any help would be greatly apprecited ----------------------------------------------------- Writer, Programer, Cook, I''m a Jack of all Trades Current Design project Chaos Factor Design Document

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To resize the window, it has to be created with window style WS_THICKFRAME.
To close the window, you have to move the PostQuitMessage() from WM_CLOSE to WM_DESTROY. By returning 0 on WM_CLOSE, you are preventing closure of your window. (hehe closure.)
What''s the error message?

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Hmm part of problem with the window is that I can''t use any of of the normal windows buttons, such as minimize, maxiumize, close. It doesn''t seem to be resgistering the clicks.

as for the message I get on application exit. its "ManyTails.exe has encoutered a problem and needs to close."

-----------------------------------------------------
Writer, Programer, Cook, I''m a Jack of all Trades
Current Design project
Chaos Factor Design Document

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I didn't read all but... take note on handling WM_SYSCOMMAND.

quote:
"ManyTails.exe has encoutered a problem and needs to close."


Wow! That's serious.

[edited by - DerekSaw on August 12, 2003 11:02:44 AM]

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