animation.java

定要上载质量高而定要上载质量高而定要上载质量高而定要上载质量高而定要上载质量高而

/*
 * Created on Apr 17, 2005
 */
package org.flexdock.dockbar.activation;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.Timer;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.flexdock.dockbar.DockbarManager;
import org.flexdock.dockbar.ViewPane;



/**
 * @author Christopher Butler
 */
public class Animation implements Runnable, ActionListener {
    private static Log log = LogFactory.getLog(Animation.class);
    
	private static int ANIMATION_INTERVAL = 20;
	private static int TOTAL_FRAME_COUNT = 5;
	
	private DockbarManager dockManager;
	private Timer timer;
	private float frameDelta;
	private int frameCount;
	private boolean hiding;
	private Runnable next;
	private Object lock;

	public Animation(DockbarManager mgr, boolean hide) {
		dockManager = mgr;
		timer = new Timer(ANIMATION_INTERVAL, this);
		frameDelta = (100f/(float)getTotalFrameCount())/100f;
		hiding = hide;
		lock = new Object();
	}

	public void run() {
		timer.start();
		sleep();
	}

	public void actionPerformed(ActionEvent e) {
		resetViewpaneSize();
		dockManager.revalidate();
		if(frameCount==getTotalFrameCount()-1) {
			timer.stop();
			wakeUp();
		}
		else
			frameCount++;
	}
	
	private void resetViewpaneSize() {
		ViewPane viewPane = dockManager.getViewPane();
		int prefSize = dockManager.getPreferredViewpaneSize();

		if(frameCount==0)
			prefSize = getStartSize(prefSize);
		else if(frameCount==getTotalFrameCount()-1)
			prefSize = getEndSize(prefSize);
		else {
			int newSize = (int)((float)prefSize * (frameCount*frameDelta));
			prefSize = hiding? prefSize-newSize: newSize;
		}

		viewPane.setPrefSize(prefSize);
	}
	
	private int getStartSize(int prefSize) {
		if(hiding)
			return prefSize;
		return 0;
	}
	
	private int getEndSize(int prefSize) {
		if(hiding)
			return 0;
		return prefSize;
	}
	
	private int getTotalFrameCount() {
		return TOTAL_FRAME_COUNT;
	}

	public Runnable getNext() {
		return next;
	}
	public void setNext(Runnable next) {
		this.next = next;
	}
	
	private void sleep() {
		synchronized(lock) {
			try {
				lock.wait();
			} catch(InterruptedException e) {
				log.debug(e.getMessage(), e);
			}
		}
	}
	
	private void wakeUp() {
		synchronized(lock) {
			lock.notifyAll();
		}
	}
}