Thread: window won't bounce

Originally Posted by Salem

so try just moving a few pixels and then exiting the wndproc

Am not being lazy, but how is that done??

I tried this such that the window gets displaced when the mouse pointer is brought on the client area, but the same problem exists..

Code:

#include <windows.h>
#include <tchar.h>  
#include <stdio.h> 
#include<time.h>

#undef WS_OVERLAPPEDWINDOW
#define WS_OVERLAPPEDWINDOW (WS_OVERLAPPED     | \
							 WS_SYSMENU        | \
                             WS_THICKFRAME   )


LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
     static TCHAR szAppName[] = TEXT ("Connect") ;
     HWND         hwnd ;
     MSG          msg ;
     WNDCLASS     wndclass ;
     
     wndclass.style         = WS_EX_DLGMODALFRAME ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
     wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
     wndclass.lpszMenuName  = NULL ;
     wndclass.lpszClassName = szAppName ;
     
     if (!RegisterClass (&wndclass))
     {
          MessageBox (NULL, TEXT ("Program requires Windows NT!"), 
                      szAppName, MB_ICONERROR) ;
          return 0 ;
     }
     
     hwnd = CreateWindow (szAppName, TEXT ("C"),
                          WS_OVERLAPPEDWINDOW,
                          CW_USEDEFAULT, CW_USEDEFAULT,
                          100, 100,
                          NULL, NULL, hInstance, NULL) ;
     
     ShowWindow (hwnd, iCmdShow) ;
     UpdateWindow (hwnd) ;
     
	 srand(time(NULL));
     while (GetMessage (&msg, NULL, 0, 0))
     {
          TranslateMessage (&msg) ;
          DispatchMessage (&msg) ;
     }

return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
     TCHAR s[100];
     static int   iCount,bottom, right, top, left, sx = 1, sy = 1   ;
     HDC          hdc ;
     int          i, j, x, y;
     PAINTSTRUCT  ps ;
	 RECT r,win;

	 top = left = 0;
	 right = GetSystemMetrics(SM_CXSCREEN) - 100;
	 bottom = GetSystemMetrics(SM_CYSCREEN) - 100;
     switch (message)
     {
	 case WM_LBUTTONDOWN:
		 
		 GetWindowRect(hwnd,&r);
			 x = rand() % 5 + 1;
			 y = rand() % 5 + 1;
			 while((r.bottom < bottom) && (r.right < right) && (r.top > top) && (r.left > left))
			 {
				 r.left += (x*sx);
				 r.top += (y*sy);
				 MoveWindow(hwnd,r.left,r.top,100,100, TRUE);
				 GetWindowRect(hwnd,&r);
			 }

			 
			 if(r.bottom>= bottom)
				 sy = -1;
			 else if(r.right>= right)
				 sx = -1;
			 else if(r.top <= top)
				 sy = 1;
			 else if(r.left<=left)
				 sx = 1;
		 
			
		 return 0;
		 
	 case WM_MOUSEMOVE:
			 SendMessage(hwnd, WM_LBUTTONDOWN,wParam,lParam);
			 return 0;
	 
	 case WM_PAINT:
		 hdc = BeginPaint(hwnd, &ps);
		 TextOut (hdc, 0, 0, TEXT("Click Me"),8) ;
		 EndPaint(hwnd, &ps);
		 return 0;
               
     case WM_DESTROY:
          PostQuitMessage (0) ;
          return 0 ;
     }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
}

Is there some way to debug a windows program line by line, by stepping into the WndProc, just like we do in the console programs?

Is there some way to debug a windows program line by line, by stepping into the WndProc, just like we do in the console programs?

Originally Posted by juice

Is there some way to debug a windows program line by line, by stepping into the WndProc, just like we do in the console programs?

What IDE are you using?

Cheap animation can be created with a timer. I have 4 of your little windows bouncing around my screen right now.

Code:

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static int bottom, right, sx = 1, sy = 1, x, y;
	static BOOL timerOn = FALSE;

	HDC hdc ;
	PAINTSTRUCT ps ;
	RECT r;

	switch (message)
	{
	case WM_CREATE:
		right  = GetSystemMetrics(SM_CXSCREEN) - 10;
		bottom = GetSystemMetrics(SM_CYSCREEN) - 10;
		return 0;

	case WM_TIMER:
		GetWindowRect(hwnd, &r);

		if      (r.bottom >= bottom) sy = -1;
		else if (r.top    <= 0     ) sy =  1;

		if      (r.right  >= right)  sx = -1;
		else if (r.left   <= 0    )  sx =  1;

		r.left += x * sx;
		r.top  += y * sy;

		MoveWindow(hwnd, r.left, r.top, 100, 100, TRUE);

		return 0;

	 case WM_LBUTTONDOWN:
		if (timerOn) {
			KillTimer(hwnd, 1);
			timerOn = FALSE;
			return 0;
		}
		x = rand() % 10 + 5;
		y = rand() % 10 + 5;
		sx = rand() % 2 ? 1 : -1;
		sy = rand() % 2 ? 1 : -1;
		SetTimer(hwnd, 1, 50, 0);
		timerOn = TRUE;
		return 0;

Originally Posted by oogabooga

what ide are you using?

msvc 2010