subprocessview.java

用JGraph编的软件

package org.jgpd.jgraph;

import java.awt.BasicStroke;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;

import org.jgraph.JGraph;
import org.jgraph.graph.CellMapper;
import org.jgraph.graph.CellViewRenderer;
import org.jgraph.graph.GraphConstants;
import org.jgraph.graph.VertexRenderer;
import org.jgraph.graph.VertexView;

public class SubProcessView
    extends VertexView {
  final static BasicStroke stroke=new BasicStroke(4.0f);
  public static int default_width = 100;
  public static int default_height = 60;

  public static SubProcessRenderer renderer = new SubProcessRenderer();

  public SubProcessView(Object cell, JGraph graph, CellMapper cm) {
    super(cell, graph, cm);
  }

  /**
   * Returns the intersection of the bounding rectangle and the
   * straight line between the source and the specified point p.
   * The specified point is expected not to intersect the bounds.
   */
  public static int getArcSize(int width, int height) {

    int arcSize;

    // The arc width of a activity rectangle is 1/5th of the larger
    // of the two of the dimensions passed in, but at most 1/2
    // of the smaller of the two. 1/5 because it looks nice and 1/2
    // so the arc can complete in the given dimension

    if (width <= height) {
      arcSize = height / 5;
      if (arcSize > (width / 2)) {
        arcSize = width / 2;
      }
    }
    else {
      arcSize = width / 5;
      if (arcSize > (height / 2)) {
        arcSize = height / 2;
      }
    }

    return arcSize;
  }

  public CellViewRenderer getRenderer() {
    return renderer;
  }


  public static class SubProcessRenderer
      extends VertexRenderer {

    public void paint(Graphics g) {
      int b = borderWidth;
      Graphics2D g2 = (Graphics2D) g;
      Dimension d = getSize();
      boolean tmp = selected;
      int roundRectArc = SubProcessView.getArcSize(d.width - b,
          d.height - b);
      if (super.isOpaque()) {
        g2.setColor(super.getBackground());
        g2.fillRoundRect(b - 1,
                        b - 1,
                        d.width - b,
                        d.height - b,
                        roundRectArc,
                        roundRectArc);
       //画小方框
           g2.drawRect((d.width+b)/2-15,d.height+b-30,30,30);

           //画"+"号
           g2.setStroke(stroke);
           g2.drawLine((d.width+b)/2-10,d.height+b-15,(d.width+b)/2+10,d.height+b-15);
         g2.drawLine((d.width+b)/2,d.height+b-25,(d.width+b)/2,d.height+b-5);

      }
      try {
        setBorder(null);
        setOpaque(false);
        selected = false;
        super.paint(g);
      }
      finally {
        selected = tmp;
      }
      if (bordercolor != null) {
        g2.setColor(bordercolor);
        g2.setStroke(new BasicStroke(b));
        g2.drawRoundRect(b - 1,
                        b - 1,
                        d.width - b,
                        d.height - b,
                        roundRectArc,
                        roundRectArc);
        //画小方框
          g2.drawRect((d.width+b)/2-15,d.height+b-30,30,30);

          //画"+"号
          g2.setStroke(stroke);
          g2.drawLine((d.width+b)/2-10,d.height+b-15,(d.width+b)/2+10,d.height+b-15);
        g2.drawLine((d.width+b)/2,d.height+b-25,(d.width+b)/2,d.height+b-5);

      }
      if (selected) {
        g2.setStroke(GraphConstants.SELECTION_STROKE);
        g2.setColor(graph.getBackground());
        g2.drawRoundRect(b - 1,
                        b - 1,
                        d.width - b,
                        d.height - b,
                        roundRectArc,
                        roundRectArc);
        //画小方框
        g2.drawRect((d.width+b)/2-15,d.height+b-30,30,30);

        //画"+"号
        g2.setStroke(stroke);
        g2.drawLine((d.width+b)/2-10,d.height+b-15,(d.width+b)/2+10,d.height+b-15);
      g2.drawLine((d.width+b)/2,d.height+b-25,(d.width+b)/2,d.height+b-5);


      }
    }
  }

}