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PC World 2001 March
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TemaCD
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devc
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_SETUP.6
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Group17
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Main.c
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C/C++ Source or Header
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2000-03-01
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5KB
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192 lines
/*
Name: WinAnim
Author: Brook Miles
Description: Making an animation in windows
*/
#include <windows.h>
#pragma hdrstop
static char g_szClassName[] = "MyWindowClass";
static HINSTANCE g_hInst = NULL;
const UINT idTimer1 = 1;
UINT nTimerDelay = 100;
HBITMAP hbmBall, hbmMask;
BITMAP bm;
int ballX, ballY;
int deltaX, deltaY;
int deltaValue = 4;
void EraseBall(HDC hdc)
{
RECT rc;
rc.left = ballX;
rc.top = ballY;
rc.right = ballX + bm.bmWidth;
rc.bottom = ballY + bm.bmHeight;
FillRect(hdc, &rc, (HBRUSH)(COLOR_BTNFACE+1));
}
void DrawBall(HDC hdc)
{
HDC hdcMemory;
hdcMemory = CreateCompatibleDC(hdc);
SelectObject(hdcMemory, hbmMask);
BitBlt(hdc, ballX, ballY, bm.bmWidth, bm.bmHeight, hdcMemory, 0, 0, SRCAND);
SelectObject(hdcMemory, hbmBall);
BitBlt(hdc, ballX, ballY, bm.bmWidth, bm.bmHeight, hdcMemory, 0, 0, SRCPAINT);
DeleteDC(hdcMemory);
}
void UpdateBall(HWND hwnd)
{
RECT rc;
GetClientRect(hwnd, &rc);
ballX += deltaX;
ballY += deltaY;
if(ballX < 0){
ballX = 0;
deltaX = deltaValue;
}
else if(ballX + bm.bmWidth > rc.right){
ballX = rc.right - bm.bmWidth;
deltaX = -deltaValue;
}
if(ballY < 0){
ballY = 0;
deltaY = deltaValue;
}
else if(ballY + bm.bmHeight > rc.bottom){
ballY = rc.bottom - bm.bmHeight;
deltaY = -deltaValue;
}
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
switch(Message)
{
case WM_CREATE:
hbmBall = LoadBitmap(g_hInst, "BALLBMP");
hbmMask = LoadBitmap(g_hInst, "MASKBMP");
if(!hbmBall || !hbmMask){
MessageBox(hwnd, "Load of resources failed.", "Error",
MB_OK | MB_ICONEXCLAMATION);
return -1;
}
GetObject(hbmBall, sizeof(bm), &bm);
SetTimer(hwnd, idTimer1, nTimerDelay, NULL);
ballX = 0;
ballY = 0;
deltaX = deltaValue;
deltaY = deltaValue;
break;
case WM_TIMER:
if(hbmBall && hbmMask)
{
HDC hdcWindow;
hdcWindow = GetDC(hwnd);
EraseBall(hdcWindow);
UpdateBall(hwnd);
DrawBall(hdcWindow);
ReleaseDC(hwnd, hdcWindow);
}
break;
case WM_PAINT:
if(hbmBall && hbmMask)
{
PAINTSTRUCT ps;
HDC hdcWindow;
hdcWindow = BeginPaint(hwnd, &ps);
DrawBall(hdcWindow);
EndPaint(hwnd, &ps);
}
break;
case WM_CLOSE:
DestroyWindow(hwnd);
break;
case WM_DESTROY:
KillTimer(hwnd, idTimer1);
DeleteObject(hbmBall);
DeleteObject(hbmMask);
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, Message, wParam, lParam);
}
return 0;
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow)
{
WNDCLASSEX WndClass;
HWND hwnd;
MSG Msg;
g_hInst = hInstance;
WndClass.cbSize = sizeof(WNDCLASSEX);
WndClass.style = 0;
WndClass.lpfnWndProc = WndProc;
WndClass.cbClsExtra = 0;
WndClass.cbWndExtra = 0;
WndClass.hInstance = g_hInst;
WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
WndClass.hbrBackground = (HBRUSH)(COLOR_BTNFACE+1);
WndClass.lpszMenuName = NULL;
WndClass.lpszClassName = g_szClassName;
WndClass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
if(!RegisterClassEx(&WndClass))
{
MessageBox(0, "Window Registration Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);
return 0;
}
hwnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
g_szClassName,
"A Bitmap Program",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, 320, 240,
NULL, NULL, g_hInst, NULL);
if(hwnd == NULL)
{
MessageBox(0, "Window Creation Failed!", "Error!",
MB_ICONEXCLAMATION | MB_OK | MB_SYSTEMMODAL);
return 0;
}
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
while(GetMessage(&Msg, NULL, 0, 0))
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}
return Msg.wParam;
}