/**
* Instantiates ball in center of window. Returns ball.
*/
GOval initBall(GWindow window)
{
int size = RADIUS*2;
GOval ball = newGOval(WIDTH/2, HEIGHT/2, size, size);
setFilled(ball, true);
setColor(ball, "#3366FF");
sendToFront(ball);
return ball;
}
int main() {
GWindow gw = newGWindow(600, 400);
GRect rect = NULL;
bool dragging = false;
double startX = 0.0;
double startY = 0.0;
while (true) {
GEvent e = waitForEvent(MOUSE_EVENT | KEY_EVENT);
if (getEventType(e) == MOUSE_PRESSED) {
startX = getX(e);
startY = getY(e);
rect = getGObjectAt(gw, startX, startY);
dragging = (rect != NULL);
if (!dragging) {
rect = newGRect(startX, startY, 0, 0);
setFilled(rect, true);
add(gw, rect);
}
} else if (getEventType(e) == MOUSE_DRAGGED) {
double x = getX(e);
double y = getY(e);
if (dragging) {
move(rect, x - startX, y - startY);
startX = x;
startY = y;
} else {
double width = fabs(x - startX);
double height = fabs(y - startY);
x = fmin(x, startX);
y = fmin(y, startY);
setBounds(rect, x, y, width, height);
}
} else if (getEventType(e) == MOUSE_CLICKED) {
if (rect != NULL) sendToFront(rect);
} else if (getEventType(e) == KEY_TYPED) {
if (rect != NULL) {
string color = "BLACK";
switch (getKeyChar(e)) {
case 'b': color = "BLUE"; break;
case 'c': color = "CYAN"; break;
case 'g': color = "GREEN"; break;
case 'm': color = "MAGENTA"; break;
case 'o': color = "ORANGE"; break;
case 'r': color = "RED"; break;
case 'w': color = "WHITE"; break;
case 'y': color = "YELLOW"; break;
}
setColor(rect, color);
}
}
}
}
