// File: UmlPalette.java
// Classes: UmlPalette
// Original Author: Kedar Patankar
// $Id: UmlPalette.java,v 1.1.1.1 1997/02/27 20:52:49 chandra Exp $

package uci.graphedit;

import java.awt.Panel;
import java.awt.Event;
import java.awt.Toolkit;
import java.awt.Frame;
import java.awt.BorderLayout;
import gjt.ImageButtonPanel;
import gjt.Separator;
import gjt.ImageButton;
import gjt.ImageButtonEvent;
import gjt.Orientation;
import gjt.StickyImageButtonController;

/** A class to define the left hand column of buttons in the Example
 * application. Right now it just has one kind of node.
 *
 * @see Example */

public class UmlPalette extends Panel
{
  private ImageButton _constvert,_constedge,_altvert,_altedge;
  private Editor _editor;

  /** Construct a new palette of example nodes for the Example application */
  public UmlPalette(Editor editor)
  { 
	  _editor=editor;
	  setLayout(new BorderLayout());

	  String INSTALL_DIR=_editor.getInstallDir();

	  ImageButtonPanel palette = new UmlPanel();

	  _constvert = new ImageButton(Toolkit.getDefaultToolkit().getImage
		(INSTALL_DIR + "/images/cv.gif"));
	  _constedge = new ImageButton(Toolkit.getDefaultToolkit().getImage
		(INSTALL_DIR + "/images/ce.gif"));
	  _altvert = new ImageButton(Toolkit.getDefaultToolkit().getImage
		(INSTALL_DIR + "/images/av.gif"));
	  _altedge = new ImageButton(Toolkit.getDefaultToolkit().getImage
		(INSTALL_DIR + "/images/ae.gif"));
	  switchoff();
	  palette.add(_constvert);
	  palette.add(_constedge);
	  palette.add(_altvert);
	  palette.add(_altedge);
	  add("Center",palette);

	  /* simulating the sticky mode */
/*	  new StickyImageButtonController(_constvert);
	  new StickyImageButtonController(_constedge);
	  new StickyImageButtonController(_altvert);
	  new StickyImageButtonController(_altedge);
*/
	  Separator separator = new Separator(3);
	  add("East",separator);
  }
  
  public void refresh()
  {
	  int i=_editor.getNoOfOpenDocuments();
	  if(i<=0)
		  switchoff();
	  else
		  switchon();
  }

  private void switchoff()
  {
	  _constvert.disable();
	  _altvert.disable();
	  _constedge.disable();
	  _altedge.disable();
  }

  private void switchon()
  {
	  _constvert.enable();
	  _altvert.enable();
	  _constedge.enable();
	  _altedge.enable();
  }

  public boolean handleEvent(Event event) 
  {
      if(event instanceof ImageButtonEvent) 
	  {
		  ImageButtonEvent ibevent = (ImageButtonEvent)event;
		  if(ibevent.isActivated()) 
		  {
			  if(event.target == _constvert)
			  {
				  Mode createVertexMode=new ModeCreateVertex
					  (_editor.curDocument(),_editor,"uci.graphedit.ConstClass");
				  _editor.curDocument().mode(createVertexMode,false);
			  }
			  if(event.target == _constedge)
			  {
				  Mode createConstEdgeMode = new ModeCreateConstEdge
					  (_editor.curDocument(),_editor);
				  _editor.curDocument().mode(createConstEdgeMode,false);
			  }
			  if(event.target == _altvert)
              {
				  Mode createVertexMode=new ModeCreateVertex
					  (_editor.curDocument(),_editor,"uci.graphedit.AltClass");
				  _editor.curDocument().mode(createVertexMode,false);
			  }
			  if(event.target == _altedge)
              {
				  Mode createAltEdgeMode = new ModeCreateAltEdge
					  (_editor.curDocument());
				  _editor.curDocument().mode(createAltEdgeMode,false);
			  }
			  return true;
          }
	  }
	  return super.handleEvent(event);
    }
} /* end class UmlPalette */