// Option 1: Long running action executes on event dispatch thread 
try {
	Thread.sleep(5000);
	color = Color.PINK;
}
catch(ex : InterruptedException ) {
	// wake up and carry on
}

// Option 2: Long running action executed in it's own thread
var worker = new ColorMePinkWorker(this);
worker.execute();

/*
 * Copyright (c) 2007, Sun Microsystems, Inc.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 *  * Redistributions of source code must retain the above copyright notice, 
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in 
 *    the documentation and/or other materials provided with the distribution.
 *  * Neither the name of Sun Microsystems, Inc. nor the names of its 
 *    contributors may be used to endorse or promote products derived 
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */
 
package motion;
 
import javafx.scene.Node;
import javafx.scene.CustomNode;
import javafx.scene.geometry.Circle;
import javafx.scene.paint.Color;
import javafx.application.Frame;
import javafx.application.Stage;
import javafx.animation.Timeline;
import javafx.animation.KeyFrame;
 
import javafx.input.*;
 
 
import java.lang.*;
import java.util.Random;
 
/**
 * @author Michal Skvor
 */
 
var spring : Number = 0.05;
var gravity : Number = 0.05;
 
var bubbles : Bubble[];
 
var width : Number = 200;
var height : Number = 200;
 
var timer : Timeline = Timeline {
    repeatCount: Timeline.INDEFINITE
    keyFrames : 
        KeyFrame {
            time : 16ms
            action : function() : Void {
                for( bubble in bubbles ) {
                    bubble.collide( bubbles, spring, width, height );
                    bubble.move( gravity, width, height );
                }
            }
        }
};
var rnd : Random = new Random();
    
for( i in [1..12] ) {
    insert Bubble {
        x : rnd.nextInt( width ), y : rnd.nextInt( height ), radius : rnd.nextInt( 10 ) + 10
        color : Color.WHITE, opacity : 0.8
    } into bubbles;
}
 
Frame {
    stage : Stage {
        fill : Color.GRAY
        content : bind bubbles
    };
 
    visible : true
    title : "Bouncy Bubbles"
    width : 200
    height : 232
    closeAction : function() { java.lang.System.exit( 0 ); }
}
 
timer.start();
 
public class Bubble extends CustomNode, BubbleInterface {
    
    public attribute x : Number;
    public attribute y : Number;
    public attribute radius : Number;
    public attribute color : Color = Color.WHITE;
    
    public attribute vx : Number;
    public attribute vy : Number;
    
    override attribute onMouseClicked = function(event: MouseEvent) : Void {
        
        // Option 1: Long running action executes on event dispatch thread 
        try {
            Thread.sleep(5000);
            color = Color.PINK;
        }
        catch(ex : InterruptedException ) {
            // wake up and carry on
        }
        
        // Option 2: Long running action executed in it's own thread
        //var worker = new ColorMePinkWorker(this);
        //worker.execute();
        
        
    }
    
    public function setColor() {
        color = Color.PINK;
    }
    
    public function collide( bubbles : Bubble[], spring : Number, width : Number, height : Number ): Void {
        for( bubble in bubbles ) {
            var dx : Number = bubble.x - x;
            var dy : Number = bubble.y - y;
            
            var distance : Number = Math.sqrt( dx * dx + dy * dy );
            var minDist : Number = bubble.radius + radius;
            
            if( distance < minDist ) {
                var angle : Number = Math.atan2( dy, dx );
                var tx : Number = x + Math.cos( angle ) * minDist;
                var ty : Number = y + Math.sin( angle ) * minDist;
                
                var ax : Number = ( tx - bubble.x ) * spring;
                var ay : Number = ( ty - bubble.y ) * spring;
                
                vx -= ax;
                vy -= ay;
                
                bubble.vx += ax;
                bubble.vy += ay;
            }
        }
    }
    
    public function move( gravity : Number, width : Number, height : Number ): Void {
        vy += gravity;
        x += vx;
        y += vy;
        
        if( x + radius > 200 ) {
            x = width - radius;
            vx *= - 0.9;
        } else if( x - radius < 0 ) {
            x = radius;
            vx *= 0.9;
        }
        if( y + radius > 200 ) {
            y = height - radius;
            vy *= -0.9;
        } else if( y - radius < 0 ) {
            y = radius;
            vy *= -0.9;
        }
    }
    
    public function create(): Node {
        return Circle {
            centerX : bind x, centerY : bind y, radius : bind radius
            fill : bind color
        };
    }
}

package motion;
 
public interface BubbleInterface {
    
    public void setColor();
 
}
 

package motion;
 
import javax.swing.SwingWorker;
 
public class ColorMePinkWorker<String, Object> extends SwingWorker {
    
    private BubbleInterface someBubble;
 
    public ColorMePinkWorker(BubbleInterface someBubble) {
        this.someBubble = someBubble;
    }
    
    @Override
    public String doInBackground() {
        // This method is called in a Thread created just for this class and 
        // outside of the event dispatch thread.
        try {
            Thread.sleep(5000);
            
            // So... DON'T set the color here - because screen might be being redrawn
            //someBubble.setColor();
        }
        catch(InterruptedException ex) {
            // wake up and carry on
        }
        
        return null;
    }
    
    @Override
    public void done() {
        // Set the color here, because "now" is a threadsafe time to do so.
        // This method is called from the event dispatch thread at a time when
        // the UI framework is processing user actions and not redrawing the 
        // the screen.
        someBubble.setColor();
    }
}