|
/*
J2ME in a Nutshell
By Kim Topley
ISBN: 0-596-00253-X
*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class AnimationMIDlet2 extends AnimationMIDlet {
// Create an AnimationCanvas2
protected AnimationMIDlet.AnimationCanvas createAnimationCanvas() {
return new AnimationCanvas2();
}
class AnimationCanvas2 extends AnimationMIDlet.AnimationCanvas {
// Override superclass paint method to take
// into account the clipping rectangle
protected void paint(Graphics g) {
// Get the clipping rectange
int clipX = g.getClipX();
int clipY = g.getClipY();
int clipWidth = g.getClipWidth();
int clipHeight = g.getClipHeight();
// Paint with the background color - only
// the area within the clipping rectangle
g.setColor(background);
g.fillRect(clipX, clipY, clipWidth, clipHeight);
// Draw all of the blocks
g.setColor(foreground);
synchronized (this) {
for (int i = 0, count = blocks.length; i < count; i++) {
g.fillRect(blocks[i].x, blocks[i].y, SIZE, SIZE);
}
}
}
// Called on expiry of timer.
public synchronized void moveAllBlocks() {
// Update the positions and speeds
// of all of the blocks and repaint
// only the part of the screen that
// they occupy
for (int i = 0, count = blocks.length; i < count; i++) {
// Request a repaint of the current location
Block block = blocks[i];
repaint(block.x, block.y, SIZE, SIZE);
blocks[i].move();
// Request a repaint of the new location
repaint(block.x, block.y, SIZE, SIZE);
}
}
}
}
|
