edu.uci.ics.jung.visualization.transform.shape.MagnifyIconGraphics Maven / Gradle / Ivy

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/*
 * Copyright (c) 2005, The JUNG Authors
 * All rights reserved.
 *
 * This software is open-source under the BSD license; see either "license.txt"
 * or https://github.com/jrtom/jung/blob/master/LICENSE for a description.
 *
 * Created on Jul 11, 2005
 */

package edu.uci.ics.jung.visualization.transform.shape;

import edu.uci.ics.jung.visualization.transform.BidirectionalTransformer;
import java.awt.Component;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Area;
import java.awt.geom.Rectangle2D;
import javax.swing.Icon;

/**
 * Subclassed to apply a magnification transform to an icon.
 *
 * @author Tom Nelson
 */
public class MagnifyIconGraphics extends TransformingFlatnessGraphics {

  public MagnifyIconGraphics(BidirectionalTransformer transformer) {
    this(transformer, null);
  }

  public MagnifyIconGraphics(BidirectionalTransformer Function, Graphics2D delegate) {
    super(Function, delegate);
  }

  public void draw(Icon icon, Component c, Shape clip, int x, int y) {

    if (transformer instanceof MagnifyShapeTransformer) {
      MagnifyShapeTransformer mst = (MagnifyShapeTransformer) transformer;
      int w = icon.getIconWidth();
      int h = icon.getIconHeight();
      Rectangle2D r = new Rectangle2D.Double(x - w / 2, y - h / 2, w, h);
      Shape lens = mst.getLens().getLensShape();
      if (lens.intersects(r)) {
        // magnify the whole icon
        Rectangle2D s = mst.magnify(r).getBounds2D();
        if (lens.intersects(s)) {
          clip = mst.transform(clip);
          double sx = s.getWidth() / r.getWidth();
          double sy = s.getHeight() / r.getHeight();

          AffineTransform old = delegate.getTransform();
          AffineTransform xform = new AffineTransform(old);
          xform.translate(s.getMinX(), s.getMinY());
          xform.scale(sx, sy);
          xform.translate(-s.getMinX(), -s.getMinY());
          Shape oldClip = delegate.getClip();
          delegate.clip(clip);
          delegate.setTransform(xform);
          icon.paintIcon(c, delegate, (int) s.getMinX(), (int) s.getMinY());
          delegate.setTransform(old);
          delegate.setClip(oldClip);
        } else {
          // clip out the lens so the small icon doesn't get drawn
          // inside of it
          Shape oldClip = delegate.getClip();
          Area viewBounds = new Area(oldClip);
          viewBounds.subtract(new Area(lens));
          delegate.setClip(viewBounds);
          icon.paintIcon(c, delegate, (int) r.getMinX(), (int) r.getMinY());
          delegate.setClip(oldClip);
        }

      } else {
        icon.paintIcon(c, delegate, (int) r.getMinX(), (int) r.getMinY());
      }
    }
  }
}