License text 

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER 
 * Copyright  2008, 2010 Oracle and/or its affiliates.  All rights reserved. 
 * Use is subject to license terms.
 * 
 * This file is available and licensed under the following license:
 * 
 * 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 Oracle Corporation 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 draganddrop;

import javafx.stage.*;
import javafx.scene.*;
import javafx.scene.paint.*;
import javafx.scene.image.*;
import javafx.util.Math;

def _sceneWidth = 240;
def _sceneHeight = 320;
var width:Number = bind scene.width on replace {
    image.layoutX = Math.max(0, Math.min(image.layoutY, scene.width - image.image.width));
};
var height:Number = bind scene.height on replace {
    image.layoutY = Math.max(0, Math.min(image.layoutY, scene.height - image.image.height));
};

var image = DraggableImage {
    maxX: bind width
    maxY: bind height
    image: Image { url: "{__DIR__}images/ball.png" }
};

var scene:Scene = Scene {
    width: _sceneWidth
    height: _sceneHeight
    content:[
         image
        ]
    fill: LinearGradient {
            startX: 0
            startY: 0
            endX: 0
            endY: 1
            proportional: true
            stops: [
                Stop {
                    offset: 0.0
                    color: Color.rgb(69, 47, 26)
                }
                Stop {
                    offset: 1.0
                    color: Color.rgb(219, 203, 166)
                }
            ]
    }
};

Stage {
    title: "Drag And Drop: v1"
    scene: scene
}
JavaFX Sample
License text 

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER 
 * Copyright  2008, 2010 Oracle and/or its affiliates.  All rights reserved. 
 * Use is subject to license terms.
 * 
 * This file is available and licensed under the following license:
 * 
 * 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 Oracle Corporation 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 draganddrop;

import javafx.stage.*;
import javafx.scene.*;
import javafx.scene.paint.*;
import javafx.scene.image.*;
import javafx.util.Math;

def _sceneWidth = 240;
def _sceneHeight = 320;
var width:Number = bind scene.width on replace {
    image.layoutX = Math.max(0, Math.min(image.layoutY, scene.width - image.image.width));
};
var height:Number = bind scene.height on replace {
    image.layoutY = Math.max(0, Math.min(image.layoutY, scene.height - image.image.height));
};

var image = DraggableImage {
    maxX: bind width
    maxY: bind height
    image: Image { url: "{__DIR__}images/ball.png" }
};

var scene:Scene = Scene {
    width: _sceneWidth
    height: _sceneHeight
    content:[
         image
        ]
    fill: LinearGradient {
            startX: 0
            startY: 0
            endX: 0
            endY: 1
            proportional: true
            stops: [
                Stop {
                    offset: 0.0
                    color: Color.rgb(69, 47, 26)
                }
                Stop {
                    offset: 1.0
                    color: Color.rgb(219, 203, 166)
                }
            ]
    }
};

Stage {
    title: "Drag And Drop: v1"
    scene: scene
}