// File: UmlPalette.java
// Classes: UmlPalette
// Author: Kedar Patankar

package EDU.neu.ccs.demeter.tools.apstudio.graphedit;

import java.awt.Panel;
import java.awt.Toolkit;
import java.awt.Insets;
import java.awt.BorderLayout;

import com.sun.java.swing.JToolBar;
import com.sun.java.swing.JButton;
import com.sun.java.swing.ImageIcon;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

/* Purpose : This class is responsible for displaying the Class Diagram toolbar and handling the events 
generated by the toolbar.
*/

public class UmlPalette extends Panel implements ActionListener
{
	private JButton _selectButton;
	private JButton _constvert,_altvert;
	private JButton _constedge,_altedge;
	private Editor _editor;
	private JToolBar _toolBar;

	public UmlPalette(Editor editor)
	{ 
		_editor=editor;
		setLayout(new BorderLayout());
		_toolBar = new JToolBar();
		makeToolbar();
		_toolBar.setFloatable(false);
		add("North",_toolBar);
	}

	public Insets getInsets(){return new Insets(1,1,1,1);}
	private void makeToolbar()
	{
		String INSTALL_DIR=_editor.getInstallDir();

		_selectButton = (JButton) _toolBar.add(new JButton(new ImageIcon(Toolkit.getDefaultToolkit().getImage(INSTALL_DIR+"/images/select.gif"))));
		_selectButton.setToolTipText("Select Objects");
		_selectButton.setMargin(new Insets(0,0,0,0));
		_selectButton.addActionListener(this);

		_toolBar.addSeparator();

		_constvert = (JButton) _toolBar.add(new JButton(new ImageIcon(Toolkit.getDefaultToolkit().getImage(INSTALL_DIR+"/images/cv.gif"))));
		_constvert.setToolTipText("Construction Class");
		_constvert.setMargin(new Insets(0,0,0,0));
		_constvert.addActionListener(this);

		_altvert = (JButton) _toolBar.add(new JButton(new ImageIcon(Toolkit.getDefaultToolkit().getImage(INSTALL_DIR+"/images/av.gif"))));
		_altvert.setToolTipText("Alternation Class");
		_altvert.setMargin(new Insets(0,0,0,0));
		_altvert.addActionListener(this);
		
		_constedge = (JButton) _toolBar.add(new JButton(new ImageIcon(Toolkit.getDefaultToolkit().getImage(INSTALL_DIR+"/images/ce.gif"))));
		_constedge.setToolTipText("Construction Edge");
		_constedge.setMargin(new Insets(0,0,0,0));
		_constedge.addActionListener(this);
		
		_altedge = (JButton) _toolBar.add(new JButton(new ImageIcon(Toolkit.getDefaultToolkit().getImage(INSTALL_DIR+"/images/ae.gif"))));
		_altedge.setToolTipText("Alternation Edge");
		_altedge.setMargin(new Insets(0,0,0,0));
		_altedge.addActionListener(this);
	}


	public void refresh()
	{
		int i=_editor.getNoOfOpenDocuments();
		if(i<=0)
			switchoff();
		else
			switchon();
	}

	private void switchoff()
	{
		_selectButton.setEnabled(false);
		_constvert.setEnabled(false);
		_altvert.setEnabled(false);
		_constedge.setEnabled(false);
		_altedge.setEnabled(false);
	}

	private void switchon()
	{
		_selectButton.setEnabled(true);
		_constvert.setEnabled(true);
		_altvert.setEnabled(true);
		_constedge.setEnabled(true);
		_altedge.setEnabled(true);
	}

	public void actionPerformed(ActionEvent event) 
	{
		_editor.curDocument().requestFocus();

		Object source = event.getSource();
		if(source == _selectButton)
			_editor.curDocument().mode(new ModeSelect(_editor.curDocument(),_editor),false);
		else
		if(source == _constvert)
			_editor.curDocument().mode(new ModeCreateConstVertex(_editor.curDocument(),_editor),false);
		else
		if(source == _altvert)
			_editor.curDocument().mode(new ModeCreateAltVertex(_editor.curDocument(),_editor),false);
		else
		if(source == _constedge)
			_editor.curDocument().mode(new ModeCreateConstEdge(_editor.curDocument(),_editor),false);
		else
		if(source == _altedge)
			_editor.curDocument().mode(new ModeCreateAltEdge(_editor.curDocument()),false);
	}

} /* end class UmlPalette */