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AnimatedCharacterDisplayCanvas.javaAPI DocExample1577Mon Apr 05 12:41:20 BST 2004javathreads.examples.ch04.example1

AnimatedCharacterDisplayCanvas

public class AnimatedCharacterDisplayCanvas extends CharacterDisplayCanvas implements Runnable, CharacterListener

Fields Summary
private boolean
done
private int
curX
private Thread
timer
Constructors Summary
public AnimatedCharacterDisplayCanvas()
public AnimatedCharacterDisplayCanvas(CharacterSource cs)

        super(cs);
Methods Summary
public synchronized voidnewCharacter(CharacterEvent ce)

        curX = 0;
        tmpChar[0] = (char) ce.character;
        repaint();
protected synchronized voidpaintComponent(java.awt.Graphics gc)

        Dimension d = getSize();
        gc.clearRect(0, 0, d.width, d.height);
        if (tmpChar[0] == 0)
            return;
        int charWidth = fm.charWidth(tmpChar[0]);
        gc.drawChars(tmpChar, 0, 1,
                     curX++, fontHeight);
public synchronized voidrun()

        while (true) {
            try {
                if (done) {
                    wait();
                } else {
                    repaint();
                    wait(100);
                }
            } catch (InterruptedException ie) {
                return;
            }
        }
public synchronized voidsetDone(boolean b)

        done = b;

        if (timer == null) {
            timer = new Thread(this);
            timer.start();
        }
        if (!done)
            notify();