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The CICA Windows Explosion!
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The CICA Windows Explosion! - Disc 2.iso
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progwin.zip
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BOUNCE.ZIP
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BOUNCE.C
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C/C++ Source or Header
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1991-11-10
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4KB
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149 lines
/*------------------------------------------
BOUNCE.C -- Bouncing Ball Program
(c) Charles Petzold, 1990
------------------------------------------*/
#include <windows.h>
long FAR PASCAL WndProc(HWND, WORD, WORD, LONG);
int PASCAL WinMain(HANDLE hInstance, HANDLE hPrevInstance,
LPSTR lpszCmdLine, int nCmdShow)
{
static char szAppName[] = "Bounce";
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
if (!hPrevInstance)
{
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = NULL;
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;
RegisterClass(&wndclass);
}
hwnd = CreateWindow(szAppName,"Bouncing Ball",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL);
if (!SetTimer(hwnd, 1, 50, NULL))
{
MessageBox(hwnd, "Too many clocks or timers!",
szAppName, MB_ICONEXCLAMATION | MB_OK);
return FALSE;
}
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
long FAR PASCAL WndProc(HWND hwnd, WORD message, WORD wParam, LONG lParam)
{
static HANDLE hBitmap;
static short cxClient, cyClient, xCenter, yCenter, cxTotal, cyTotal,
cxRadius, cyRadius, cxMove, cyMove, xPixel, yPixel;
HBRUSH hBrush;
HDC hdc, hdcMem;
short nScale;
switch (message)
{
case WM_CREATE:
hdc = GetDC(hwnd);
xPixel = GetDeviceCaps(hdc, ASPECTX);
yPixel = GetDeviceCaps(hdc, ASPECTY);
ReleaseDC(hwnd, hdc);
return 0;
case WM_SIZE:
xCenter = (cxClient = LOWORD(lParam)) / 2;
yCenter = (cyClient = HIWORD(lParam)) / 2;
nScale = min(cxClient * xPixel, cyClient * yPixel) / 16;
cxRadius = nScale / xPixel;
cyRadius = nScale / yPixel;
cxMove = max(1, cxRadius / 4);
cyMove = max(1, cyRadius / 4);
cxTotal = 2 * (cxRadius + cxMove);
cyTotal = 2 * (cyRadius + cyMove);
if (hBitmap)
DeleteObject(hBitmap);
hdc = GetDC(hwnd);
hdcMem = CreateCompatibleDC(hdc);
hBitmap = CreateCompatibleBitmap(hdc, cxTotal, cyTotal);
ReleaseDC(hwnd, hdc);
SelectObject(hdcMem, hBitmap);
Rectangle(hdcMem, -1, -1, cxTotal + 1, cyTotal + 1);
hBrush = CreateHatchBrush(HS_DIAGCROSS, 0L);
SelectObject(hdcMem, hBrush);
SetBkColor(hdcMem, RGB(255,0,255));
Ellipse(hdcMem, cxMove, cyMove, cxTotal - cxMove,
cyTotal - cyMove);
DeleteDC(hdcMem);
DeleteObject(hBrush);
return 0;
case WM_TIMER:
if (!hBitmap)
break;
hdc = GetDC(hwnd);
hdcMem = CreateCompatibleDC(hdc);
SelectObject(hdcMem, hBitmap);
BitBlt(hdc, xCenter - cxTotal / 2,
yCenter - cyTotal / 2, cxTotal, cyTotal,
hdcMem, 0, 0, SRCCOPY);
ReleaseDC(hwnd, hdc);
DeleteDC(hdcMem);
xCenter += cxMove;
yCenter += cyMove;
if ((xCenter + cxRadius >= cxClient) ||
(xCenter - cxRadius <= 0))
cxMove = -cxMove;
if ((yCenter + cyRadius >= cyClient) ||
(yCenter - cyRadius <= 0))
cyMove = -cyMove;
return 0;
case WM_DESTROY:
if (hBitmap)
DeleteObject(hBitmap);
KillTimer(hwnd, 1);
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}