timer.java

mywork是rcp开发的很好的例子

/************************************************************
 *
 * Copyright (c) 2001 Chemi. All rights reserved.
 * 
 * This program and the accompanying materials
 * are made available under the terms of the MIT License
 * which accompanies this distribution, and is available at
 * http://www.opensource.org/licenses/mit-license.html
 *
 ************************************************************/

package es.org.chemi.games.util;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;

import es.org.chemi.games.GamesPlugin;

public class Timer extends Composite implements Runnable
{
	private boolean running = false;
	boolean reset = true;
	int cron = 0;
	int length = 1;
	private int maxvalue = 9;
	Label[] digits = null;

	private Composite parent = null;
	
	private String owner = null;
	
	String aux = null;
	
	public Timer(Composite parent, int style, int length, String owner)
	{
		super(parent,style);
		this.parent = parent;
		this.owner = owner;
		this.length = length;
		
		this.digits = new Label[length];
		
		GamesPlugin.trace(this.getClass().getName(),"Creation of the timer started. (" + owner + ")"); //$NON-NLS-1$ //$NON-NLS-2$
		
		// Calculate maximun value.
		StringBuffer tmp = new StringBuffer();
		for(int i=0; i<length; i++)
			tmp.append(9);
		maxvalue = Integer.parseInt(tmp.toString());

		// Set layout.		
		RowLayout timerLayout = new RowLayout();
		timerLayout.justify = true;
		setLayout(timerLayout);		
		
		// Set layout.
		RowLayout containerLayout = new RowLayout();
		containerLayout.spacing = 0;
		containerLayout.marginTop = 0;
		containerLayout.marginBottom = 0;
		containerLayout.marginLeft = 0;
		containerLayout.marginRight = 0;
		this.setLayout(containerLayout);

		// Loading images.
		GamesPlugin.trace(this.getClass().getName(),"Loading images for the timer. (" + owner + ")"); //$NON-NLS-1$ //$NON-NLS-2$
		for(int i=0; i<10; i++)
		{
			if(GamesPlugin.getResourceManager().getImage(Integer.toString(i)) == null)
				GamesPlugin.getResourceManager().putImage(Integer.toString(i),new Image(Display.getCurrent(),this.getClass().getClassLoader().getResourceAsStream("icons/" + i + ".gif"))); //$NON-NLS-1$ //$NON-NLS-2$
		}

		// Loading colors.
		GamesPlugin.trace(this.getClass().getName(),"Loading colors for the timer. (" + owner + ")"); //$NON-NLS-1$ //$NON-NLS-2$
		
		// Initialice the timer.
		for(int i=0; i<length; i++)
		{
			digits[i] = new Label(this,SWT.NONE);
			digits[i].setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_BLACK));
			digits[i].setImage(GamesPlugin.getResourceManager().getImage(Integer.toString(0)));
		}

		GamesPlugin.trace(this.getClass().getName(),"Creation of the timer finished. (" + owner + ")"); //$NON-NLS-1$ //$NON-NLS-2$
	}
	
	public void run()
	{
		// Set the name of the thread.
		Thread.currentThread().setName("Common - Timer"); //$NON-NLS-1$
		
		while(running)
		{
			try
			{
				// Count seconds.
				Thread.sleep(1000);
				cron++;
				
				showTime();
			}
			catch(InterruptedException ex)
			{
				GamesPlugin.getDefault().getLog().log(new Status(IStatus.ERROR,GamesPlugin.getDefault().getBundle().getSymbolicName(),IStatus.ERROR,ex.toString(),null));				
			}
			catch(SWTException ex)
			{
				// Theoretically fired when closing the game while the timer still working.
			}

			// Check if it needs to reset the timer (see resetRunning method).			
			if(reset && parent != null  && parent.getDisplay() != null)
			{
				parent.getDisplay().syncExec(new Runnable() 
				{
    				public void run() 
    				{
						for(int i=0; i<length; i++)
							digits[i].setImage(GamesPlugin.getResourceManager().getImage(Integer.toString(0)));
						cron = 0;														
						reset = false;
    				}
				});
			}
		}
	}

	private void showTime() {
		// Calculate the images to be displayed.	
		aux = Integer.toString(cron);
		StringBuffer tmp = new StringBuffer();
		for(int i=0; i<digits.length - aux.length(); i++)
			tmp.append(0);
		tmp.append(aux);
		aux = tmp.toString();
		
		if(!(cron > maxvalue))	// Don't increment.
		{
			// Show images.
			parent.getDisplay().syncExec(new Runnable() 
			{
				public void run() 
				{
					try
					{
						for(int i=0; i<digits.length; i++)
							digits[i].setImage(GamesPlugin.getResourceManager().getImage(aux.substring(i,i+1)));
					}
					catch(SWTException ex)
					{
						// Theoretically fired when closing the game while the timer still working.
					}
				}
			});
		}
	}
	
	public boolean isRunning()
	{
		return running;
	}
	
	// Start the timer.
	public void start()
	{
		GamesPlugin.trace(this.getClass().getName(),"Timer started. (" + owner + ")"); //$NON-NLS-1$ //$NON-NLS-2$
		running = true;
		new Thread(this).start();
	}
	
	// Stop the timer
	public void stop()
	{
		GamesPlugin.trace(this.getClass().getName(),"Timer stopped. (" + owner + ")"); //$NON-NLS-1$ //$NON-NLS-2$
		running = false;
	}
	
	// Reset the timer if it is running.
	public void resetRunning()
	{
		GamesPlugin.trace(this.getClass().getName(),"Timer reseted. (" + owner + ")"); //$NON-NLS-1$ //$NON-NLS-2$
		reset = true;
	}
	
	// Reset the timer if it is stoped.
	public void resetStopped()
	{
		GamesPlugin.trace(this.getClass().getName(),"Timer reseted. (" + owner + ")"); //$NON-NLS-1$ //$NON-NLS-2$
		for(int i=0; i<length; i++)
			digits[i].setImage(GamesPlugin.getResourceManager().getImage(Integer.toString(0)));
		cron = 0;									
	}
	
	// Get the time.
	public int getTime()
	{
		return cron;
	}
	
	public void setTime(int time){
		cron = time;
		reset=false;
		showTime();
	}
}