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-
- import java.awt.*;
- import java.awt.event.*;
- import java.applet.*;
-
-
- /**
- * The final version of the Click applet adds some additional logic
- * to make a pathetic little game out of the parts we've assembled.
- * Note that we've made a significant change to the TargetListener
- * class: it's no longer static. As an ordinary nested class it has
- * access to the currentTarget field which it writes each time the
- * mouse enters or exits a target. The MouseListener called shootTarget
- * reads this field when the user clicks the mouse.
- *
- * This applet runs correctly in HotJava, it requires JDK 1.1.
- */
-
-
- public class Click3 extends Applet
- {
- Color puckColor = new Color(200, 0, 10);
- Box puck = new Box(puckColor);
- ColumnOfBoxes[] targets = new ColumnOfBoxes[8];
- ColumnOfBoxes currentTarget;
-
- private final class TargetListener
- extends MouseAdapter implements MouseMotionListener
- {
- private Color newBackground;
- private Color oldBackground;
-
- TargetListener(Color newBackground) {
- this.newBackground = newBackground;
- }
-
- public void mouseEntered(MouseEvent e) {
- oldBackground = e.getComponent().getBackground();
- e.getComponent().setBackground(newBackground);
- currentTarget = (ColumnOfBoxes)(e.getComponent());
- }
-
- public void mouseExited(MouseEvent e) {
- e.getComponent().setBackground(oldBackground);
- currentTarget = null;
- }
-
- private void redispatch(MouseEvent e) {
- Point origin = e.getComponent().getLocation();
- e.translatePoint(origin.x, origin.y);
- e.getComponent().getParent().dispatchEvent(e);
- }
-
- public void mouseMoved(MouseEvent e) { redispatch(e); }
- public void mouseDragged(MouseEvent e) { redispatch(e); }
- public void mouseClicked(MouseEvent e) { redispatch(e); }
- }
-
- public Click3()
- {
- MouseMotionListener movePuck = new MouseMotionAdapter() {
- public void mouseMoved(MouseEvent e)
- {
- int x = e.getX() - (puck.getSize().width / 2);
- int y = getSize().height - puck.getSize().height;
- puck.setLocation(x, y);
- }
- };
-
- MouseListener shootTarget = new MouseAdapter() {
- public void mouseClicked(MouseEvent e)
- {
- if (currentTarget != null) {
- int nBoxes = currentTarget.getComponentCount();
- if (nBoxes == e.getClickCount()) {
- currentTarget.removeAll();
- currentTarget.getToolkit().beep();
- currentTarget.repaint();
- }
- }
- }
- };
-
- for(int i = 0; i < targets.length; i++) {
- int nBoxes = 1 + (int)(Math.random() * 4.0);
- float boxHue = (float)i / (float)targets.length;
- Color boxColor = Color.getHSBColor(boxHue, 0.5f, 0.85f);
- TargetListener tl = new TargetListener(boxColor.brighter());
- targets[i] = new ColumnOfBoxes(boxColor, nBoxes);
- targets[i].addMouseListener(tl);
- targets[i].addMouseMotionListener(tl);
- add(targets[i]);
- }
-
- add(puck);
- addMouseMotionListener(movePuck);
- addMouseListener(shootTarget);
- }
-
- public static void main(String[] args)
- {
- WindowListener l = new WindowAdapter()
- {
- public void windowClosing(WindowEvent e) {System.exit(0);}
- };
-
- Frame f = new Frame("Click");
- f.addWindowListener(l);
- f.add(new Click3());
- f.setSize(600, 400);
- f.show();
- }
- }
-