bundles/org.eclipse.wst.xsd.ui/src/org/eclipse/wst/xsd/ui/internal/graph/figures/Interactor.java

/*******************************************************************************
 * Copyright (c) 2001, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.xsd.ui.internal.graph.figures;
            
import org.eclipse.draw2d.Graphics;
import org.eclipse.draw2d.RectangleFigure;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Rectangle;

/**
 * Interactor the +/- control commonly found in trees
 */
public class Interactor extends RectangleFigure
{
  protected boolean isExpanded;

  public Interactor()
  {
    super(); 
    setPreferredSize(new Dimension(9, 9));               
  }  

  public void setExpanded(boolean isExpanded)
  {                                         
    this.isExpanded = isExpanded;
  }

  public boolean isExpanded()
  {
    return isExpanded;
  }
    
  protected void fillShape(Graphics g)
  {
    super.fillShape(g);
    Rectangle r = getBounds();                          
    int mx = r.x + r.width / 2;
    int my = r.y + r.height / 2;    
    int s = 2;       
    g.drawLine(r.x + s, my, r.x + r.width - s - 1, my); 
    if (!isExpanded)
    {
      g.drawLine(mx, r.y + s, mx, r.y + r.height - s -1);
    }
  }
}