/** Application to allows graphical representation of graphs and finds
    shortest path among nodes. **/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.colorchooser.*;

public class spApp extends JFrame {
  public spApp () {
    
    // Create a window
    super("Tree of Colors");

    //Make the panel with operations options and a text area for directions.
    final JPanel Tpanel = new JPanel(new FlowLayout());
    Tpanel.setBorder(BorderFactory.createTitledBorder("Choose Graph Operation"));

    //create text area
    final JTextField text=new JTextField(50);
    text.setText("Click to make nodes; Press/Release to make edges.");
    text.setForeground(Color.yellow);
    text.setBackground(Color.blue);
    text.setOpaque(true);

    //Create a combo-box for choosing the mode of operation on the graph
    final String[] optionNames = {"Create Graph", "Find SP"};
    final JLabel    optionLabel = new JLabel("Operation:");
    final JComboBox optionChoices = new JComboBox(optionNames);
    optionChoices.setSelectedIndex(0);

    optionChoices.addActionListener(new ActionListener() {       
        public void actionPerformed(ActionEvent evt) {
          // Get the size                                      (16)
          switch (optionChoices.getSelectedIndex()) {
          case 0:  
            text.setText("Click to make nodes; Press/release to make edges.");
            break;
          case 1:
            text.setText("Press/Release to choose source/destination nodes.");
            break;
          default: text.setText("Unknown Operation."); return;
          }
        }
      });

    Tpanel.setLayout(new FlowLayout());
    Tpanel.add(optionLabel);
    Tpanel.add(optionChoices);
    Tpanel.add(text);

    // Create a chooser
    final JColorChooser c=new JColorChooser(Color.blue);
    c.setBorder(BorderFactory.createTitledBorder("Choose A Node Color"));


    //Create the tree and the treeImage object
    final graphImage g = new graphImage(c,optionChoices,text);

    //make scroll pane for the graphImage
    final JScrollPane scrollPane = new JScrollPane(g);
    JPanel drawingPanel = new JPanel(new BorderLayout());
    drawingPanel.add(scrollPane, BorderLayout.CENTER);
    drawingPanel.setBorder(BorderFactory.createTitledBorder("Graph Image"));

    //add components
    getContentPane().add(Tpanel, BorderLayout.NORTH);
    getContentPane().add(drawingPanel, BorderLayout.CENTER);
    getContentPane().add(c, BorderLayout.SOUTH);
  }

  /** Create an instance of the application **/
  public static void main(String args[]) { 
    spApp app= new spApp();
    //Finish setting up the frame, and show it.
    app.addWindowListener(new WindowAdapter() {
        public void windowClosing(WindowEvent e) {
          System.exit(0);
        }
      });
    
    try {                                            
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()
      //              "com.sun.java.swing.plaf.motif.MotifLookAndFeel"
      //              "com.sun.java.swing.plaf.windows.WindowsLookAndFeel"
      //              "javax.swing.plaf.mac.MacLookAndFeel"
                               );
    } catch (Exception e) { System.err.println(e.getMessage()); }
    SwingUtilities.updateComponentTreeUI(app);      
    app.pack();
    app.setVisible(true);
  }
}