import java.awt.event.*;
import javax.swing.*;
public class GraphEditorFrame  extends JFrame implements ActionListener {
	private GraphEditor  editor;
	
	public GraphEditorFrame (String title) {
		this(title, new Graph());
	}
	public GraphEditorFrame (String title, Graph g) {
		super(title);
		add(editor = new GraphEditor(g));
		
		JMenuBar menubar = new JMenuBar();
		setJMenuBar(menubar);
		JMenu file = new JMenu("File");
		menubar.add(file);
		JMenuItem load = new JMenuItem("Load");
		JMenuItem save = new JMenuItem("Save");
		file.add(load);
		file.add(save);
		load.addActionListener(this);
		save.addActionListener(this);
				
		setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(600, 400);
	}
	
	public void actionPerformed(ActionEvent e) {
		JFileChooser chooser = new JFileChooser();
		if (e.getActionCommand().equals("Load")) {
			int returnVal = chooser.showOpenDialog(this);

			if (returnVal == JFileChooser.APPROVE_OPTION) {
				System.out.println("Loading From: " + chooser.getSelectedFile().getAbsoluteFile());
				try {
					editor.setGraph(Graph.loadFrom(new java.io.BufferedReader(
						new java.io.FileReader(chooser.getSelectedFile().getAbsoluteFile()))));
				}
				catch(Exception ex) {
					JOptionPane.showMessageDialog(null,
                   		"Error Loading Graph From File !",
                   		"Error",
                   		JOptionPane.ERROR_MESSAGE);
                }
			}
		}
		else {
			int returnVal = chooser.showSaveDialog(null);

			if (returnVal == JFileChooser.APPROVE_OPTION) {
    			try {
    				System.out.println("Saving to: " + chooser.getSelectedFile().getAbsoluteFile());
    				editor.getGraph().saveTo(new java.io.PrintWriter(
    					new java.io.FileWriter(chooser.getSelectedFile().getAbsoluteFile())));
				}
				catch(java.io.IOException ex) {}
			}
		}
	}

	public static void main(String args[]) {
		new GraphEditorFrame("Graph Editor", Graph.example()).setVisible(true);
    }
}