/** Handle a key press event. */
void HandleKeyPressEvent(XKeyEvent *event) {
if(event->keycode == keyRight || event->keycode == keyL) {
moveRight = 1;
} else if(event->keycode == keyLeft || event->keycode == keyJ) {
moveLeft = 1;
} else if(event->keycode == keyESC) {
shouldExit = 1;
} else if(event->keycode == keySpace) {
if(isPaused) {
isPaused = 0;
} else {
isPaused = 1;
}
SetPaused(isPaused);
} else if(event->keycode == keyBackspace) {
EraseBall();
UpdateLives(-1);
SetBallForRestart();
didDie = 1;
}
}
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;
}
/** Game event loop. */
void EventLoop() {
struct timeval last, current;
unsigned long elapsedTime;
int repeat;
XEvent event;
SetFirstLevel();
XSelectInput(display, mainWindow, KeyPressMask | KeyReleaseMask
| ButtonPressMask | ButtonReleaseMask | ExposureMask);
shouldExit = 0;
DoStartDelay();
gettimeofday(&last, NULL);
while(!shouldExit) {
if(didWin) {
WinLoop();
NextLevel();
moveRight = 0;
moveLeft = 0;
gettimeofday(&last, NULL);
}
if(didLose) {
Redraw();
DoStartDelay();
break;
}
while(XPending(display) > 0) {
XNextEvent(display, &event);
switch(event.type) {
case Expose:
HandleExposeEvent(&event.xexpose);
break;
case KeyPress:
HandleKeyPressEvent(&event.xkey);
break;
case KeyRelease:
HandleKeyReleaseEvent(&event.xkey);
break;
case ButtonPress:
HandleButtonPressEvent();
break;
default:
break;
}
}
if(isPaused) {
gettimeofday(&last, NULL);
continue;
}
gettimeofday(¤t, NULL);
elapsedTime = (current.tv_sec - last.tv_sec) * 1000000;
elapsedTime += current.tv_usec - last.tv_usec;
if(elapsedTime >= SPEED) {
last = current;
EraseBall();
repeat = (int)(((float)elapsedTime / SPEED) + 0.5);
do {
if(moveRight && !moveLeft) {
MoveBallRight();
} else if(moveLeft && !moveRight) {
MoveBallLeft();
}
MoveBall();
--repeat;
} while(repeat);
DrawBall();
Redraw();
if(didDie) {
didDie = 0;
DoStartDelay();
gettimeofday(&last, NULL);
}
}
}
}