[jfreechart-dev] [ jfreechart-Patches-1615504 ] DialImage (Extension for DialPlot)

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Patches item #1615504, was opened at 2006-12-14 07:20
Message generated for change (Settings changed) made by johnmay666
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Category: None
Group: None
>Status: Pending
Resolution: None
Priority: 5
Private: No
Submitted By: JohnMay (johnmay666)
Assigned to: Nobody/Anonymous (nobody)
Summary: DialImage (Extension for DialPlot)

Initial Comment:
Testcase:
Take any example (remove background gradient definitions for testing) and add:

  ...
  ImageIcon image = new ImageIcon("wood.png");
  DialImage di = new DialImage(image.getImage());
  dialplot.addLayer(di);
  ... 

This should do the trick (any image will be okay, since it will be resized. The attached file is a good start for sizes and how much is lost because of the round shape)

CLASS DialImage:

import java.awt.*;
import java.awt.geom.Rectangle2D;
import org.jfree.experimental.chart.plot.dial.AbstractDialLayer;
import org.jfree.experimental.chart.plot.dial.DialLayer;
import org.jfree.experimental.chart.plot.dial.DialLayerChangeEvent;
import org.jfree.experimental.chart.plot.dial.DialPlot;
import org.jfree.ui.Align;

public class DialImage
    extends AbstractDialLayer implements DialLayer {

  public DialImage() {
    this(null);
  }

  public DialImage(Image image) {
    imageAlpha = 0.5F;
    imageAlignment = 15;
    this.image = image;
  }

  public Image getBackgroundImage() {
    return image;
  }

  public int getBackgroundImageAlignment() {
    return imageAlignment;
  }

  public float getImageAlpha() {
    return imageAlpha;
  }

  public void setBackgroundImageAlignment(int alignment) {
    if (imageAlignment != alignment) {
      imageAlignment = alignment;
      notifyListeners(new DialLayerChangeEvent(this));
    }
  }

  public void setImageAlpha(float alpha) {
    if (imageAlpha != alpha) {
      imageAlpha = alpha;
      notifyListeners(new DialLayerChangeEvent(this));
    }
  }

  public void setBackgroundImage(Image image) {
    this.image = image;
    notifyListeners(new DialLayerChangeEvent(this));
  }

  public boolean isClippedToWindow() {
    return true;
  }

  public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame, Rectangle2D view) {
    Rectangle2D area = plot.rectangleByRadius(view, plot.getViewHeight(), plot.getViewWidth());
    drawImage(g2, area);
  }

  public void drawImage(Graphics2D g2, Rectangle2D area) {
    if (image != null) {
      java.awt.Composite originalComposite = g2.getComposite();
      g2.setComposite(AlphaComposite.getInstance(3, imageAlpha));
      Rectangle2D dest = new java.awt.geom.Rectangle2D.Double(0.0D, 0.0D, image.getWidth(null), image.getHeight(null));
      Align.align(dest, area, imageAlignment);
      g2.drawImage(image, (int) dest.getX(), (int) dest.getY(), (int) dest.getWidth() + 1, (int) dest.getHeight() + 1, null);
      g2.setComposite(originalComposite);
    }
  }

  private transient Image image;
  private float imageAlpha;
  private int imageAlignment;
}

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