/* ===========================================================
 
* JFreeChart : a free chart library for the Java(tm) platform
 
* ===========================================================
 
*
 
* (C) Copyright 2000-2016, by Object Refinery Limited and Contributors.
 
*
 
* Project Info:
  
http://www.jfree.org/jfreechart/index.html
 
*
 
* This library is free software; you can redistribute it and/or modify it
 
* under the terms of the GNU Lesser General Public License as published by
 
* the Free Software Foundation; either version 2.1 of the License, or
 
* (at your option) any later version.
 
*
 
* This library is distributed in the hope that it will be useful, but
 
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 
* License for more details.
 
*
 
* You should have received a copy of the GNU Lesser General Public
 
* License along with this library; if not, write to the Free Software
 
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  
02110-1301,
 
* USA.
 
*
 
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
 
* Other names may be trademarks of their respective owners.]
 
*
 
* ----------------------
 
* ChartTransferable.java
 
* ----------------------
 
* (C) Copyright 2009-2016, by Object Refinery Limited.
 
*
 
* Original Author:
  
David Gilbert (for Object Refinery Limited);
 
* Contributor(s):
   
-;
 
*
 
* Changes
 
* -------
 
* 08-Apr-2009 : Version 1, with inspiration from patch 1460845 (DG);
 
* 05-May-2009 : Match the scaling options provided by the ChartPanel
 
*
               
class (DG);
 
*
 
*/

package org.jfree.chart;

import java.awt.Graphics2D;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.IOException;

/**
 
* A class used to represent a chart on the clipboard.
 
*
 
* @since 1.0.13
 
*/

public class ChartTransferable implements Transferable {

    
/** The data flavor. */
    
final DataFlavor imageFlavor = new DataFlavor(
            
"image/x-java-image; class=java.awt.Image", "Image");
    

    

    
/** The chart. */
    
private JFreeChart chart;

    
/** The width of the chart on the clipboard. */
    
private int width;

    
/** The height of the chart on the clipboard. */
    
private int height;

    
/**
     
* The smallest width at which the chart will be drawn (if necessary, the
     
* chart will then be scaled down to fit the requested width).
     
*
     
* @since 1.0.14
     
*/

    
private int minDrawWidth;

    
/**
     
* The smallest height at which the chart will be drawn (if necessary, the
     
* chart will then be scaled down to fit the requested height).
     
*
     
* @since 1.0.14
     
*/

    
private int minDrawHeight;

    
/**
     
* The largest width at which the chart will be drawn (if necessary, the
 

     
* chart will then be scaled up to fit the requested width).
 

     
*
 

     
* @since 1.0.14
     
*/

    
private int maxDrawWidth;

    
/**
     
* The largest height at which the chart will be drawn (if necessary, the
     
* chart will then be scaled up to fit the requested height).
     
*
     
* @since 1.0.14
     
*/

    
private int maxDrawHeight;

    
/**
     
* Creates a new chart selection.
     
*
     
* @param chart
  
the chart.
     
* @param width
  
the chart width.
     
* @param height
  
the chart height.
     
*/

    
public ChartTransferable(JFreeChart chart, int width, int height) {
        
this(chart, width, height, true);
    
}

    
/**
     
* Creates a new chart selection.
     
*
     
* @param chart
  
the chart.
     
* @param width
  
the chart width.
     
* @param height
  
the chart height.
     
* @param cloneData
  
clone the dataset(s)?
     
*/

    
public ChartTransferable(JFreeChart chart, int width, int height,
            
boolean cloneData) {
        
this(chart, width, height, 0, 0, Integer.MAX_VALUE, Integer.MAX_VALUE,
                
true);
    
}

    
/**
     
* Creates a new chart selection.
  
The minimum and maximum drawing
     
* dimensions are used to match the scaling behaviour in the
     
* {@link ChartPanel} class.
     
*
     
* @param chart
  
the chart.
     
* @param width
  
the chart width.
     
* @param height
  
the chart height.
     
* @param minDrawW
  
the minimum drawing width.
     
* @param minDrawH
  
the minimum drawing height.
     
* @param maxDrawW
  
the maximum drawing width.
     
* @param maxDrawH
  
the maximum drawing height.
     
* @param cloneData
  
clone the dataset(s)?
     
*
     
* @since 1.0.14
     
*/

    
public ChartTransferable(JFreeChart chart, int width, int height,
            
int minDrawW, int minDrawH, int maxDrawW, int maxDrawH,
            
boolean cloneData) {

        
// we clone the chart because presumably there can be some delay
        
// between putting this instance on the system clipboard and
        
// actually having the getTransferData() method called...
        
try {
            
this.chart = (JFreeChart) chart.clone();
        
}
        
catch (CloneNotSupportedException e) {
            
this.chart = chart;
        
}
        
// FIXME: we've cloned the chart, but the dataset(s) aren't cloned
        
// and we should do that
        
this.width = width;
        
this.height = height;
        
this.minDrawWidth = minDrawW;
        
this.minDrawHeight = minDrawH;
        
this.maxDrawWidth = maxDrawW;
        
this.maxDrawHeight = maxDrawH;
    
}

    
/**
     
* Returns the data flavors supported.
     
*
 

     
* @return The data flavors supported.
     
*/

    
@Override
    
public DataFlavor[] getTransferDataFlavors() {
        
return new DataFlavor[] {this.imageFlavor};
    
}

    
/**
     
* Returns {@code true} if the specified flavor is supported.
     
*
     
* @param flavor
  
the flavor.
     
*
     
* @return A boolean.
     
*/

    
@Override
    
public boolean isDataFlavorSupported(DataFlavor flavor) {
        
return this.imageFlavor.equals(flavor);
    
}

    
/**
     
* Returns the content for the requested flavor, if it is supported.
     
*
     
* @param flavor
  
the requested flavor.
     
*
     
* @return The content.
     
*
     
* @throws java.awt.datatransfer.UnsupportedFlavorException if the flavor
 

     
*
         
is not supported.
     
* @throws java.io.IOException if there is an IO problem.
     
*/

    
@Override
    
public Object getTransferData(DataFlavor flavor)
            
throws UnsupportedFlavorException, IOException {
        
if (this.imageFlavor.equals(flavor)) {
            
return createBufferedImage(this.chart, this.width, this.height,
                    
this.minDrawWidth, this.minDrawHeight, this.maxDrawWidth,
                    
this.maxDrawHeight);
        
} else {
            
throw new UnsupportedFlavorException(flavor);
        
}
    
}

    
/**
     
* A utility method that creates an image of a chart, with scaling.
     
*
     
* @param chart
  
the chart.
     
* @param w
  
the image width.
     
* @param h
  
the image height.
     
* @param minDrawW
  
the minimum width for chart drawing.
     
* @param minDrawH
  
the minimum height for chart drawing.
     
* @param maxDrawW
  
the maximum width for chart drawing.
     
* @param maxDrawH
  
the maximum height for chart drawing.
     
*
     
* @return
  
A chart image.
     
*
     
* @since 1.0.14
     
*/

    
private BufferedImage createBufferedImage(JFreeChart chart, int w, int h,
            
int minDrawW, int minDrawH, int maxDrawW, int maxDrawH) {

        
BufferedImage image = new BufferedImage(w, h,
                
BufferedImage.TYPE_INT_ARGB);
        
Graphics2D g2 = image.createGraphics();

        
// work out if scaling is required...
        
boolean scale = false;
        
double drawWidth = w;
        
double drawHeight = h;
        
double scaleX = 1.0;
        
double scaleY = 1.0;
        
if (drawWidth < minDrawW) {
            
scaleX = drawWidth / minDrawW;
            
drawWidth = minDrawW;
            
scale = true;
        
}
        
else if (drawWidth > maxDrawW) {
            
scaleX = drawWidth / maxDrawW;
            
drawWidth = maxDrawW;
            
scale = true;
        
}
        
if (drawHeight < minDrawH) {
            
scaleY = drawHeight / minDrawH;
            
drawHeight = minDrawH;
            
scale = true;
        
}
        
else if (drawHeight > maxDrawH) {
            
scaleY = drawHeight / maxDrawH;
            
drawHeight = maxDrawH;
            
scale = true;
        
}

        
Rectangle2D chartArea = new Rectangle2D.Double(0.0, 0.0, drawWidth,
                
drawHeight);
        
if (scale) {
            
AffineTransform st = AffineTransform.getScaleInstance(scaleX,
                    
scaleY);
            
g2.transform(st);
        
}
        
chart.draw(g2, chartArea, null, null);
        
g2.dispose();
        
return image;

    
}

}