wmvcapp.java

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/*
 * WmvcApp - The main Application Class for Wmvc
 * Copyright (c) 2001, Bruce E. Wampler
 */

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public abstract class WmvcApp
{
    private static WmvcApp theApp = null;       // Singleton

    // Model
    
    protected static WmvcModel theModel = null;
    
    // GUI interface parts
    private static JFrame theFrame = null;  // The topmost frame
    private static JMenuBar theMenuBar = null;
    private static JToolBar theToolBar = null;
    private static JPanel theContentPanel = null;
   
    public static JFrame getFrame() { return theFrame; }
    public static JMenuBar getMenuBar() { return theMenuBar; }
    public static JToolBar getToolBar() { return theToolBar; }
    public static JPanel getContentPanel()
        { return theContentPanel; }
    public static WmvcModel getModel() { return theModel; }
    public static void setModel(WmvcModel m) { theModel = m; }
    
    public static WmvcApp getApp()
    {
        return theApp;
    }
    
    // Only one constructor. Could have alternates:
    //        public WmvcApp()
    //        public WmvcApp(String aName)
    public WmvcApp(String aName, boolean cMenu, boolean cTool)
    {
        if (theApp != null)
            return;
        theApp = this;
        initializeWmvc(aName,cMenu,cTool);
    }
    
    private void initializeWmvc(String aName, boolean cMenu,
                                boolean cTool)
    {
        // Step 1 - set up the main JFrame
        theFrame = new JFrame(aName);

        // handle closing cleanly
        theFrame.setDefaultCloseOperation(
                                    JFrame.DO_NOTHING_ON_CLOSE);
        theFrame.addWindowListener(new WindowAdapter()
          {
              public void windowClosing(WindowEvent e)
              { 
                  if (theApp.appClosing())
                      System.exit(0);
              } 
          });

        // Step 2 - the menu bar
        if (cMenu)              // add a MenuBar?
        {
            theMenuBar = new JMenuBar();
            theFrame.setJMenuBar(theMenuBar);
        }

        // Step 3 - the JPanel (may or may not have a tool bar)
        
        theContentPanel = new JPanel();             // A JPanel
        theContentPanel.setLayout(new BorderLayout());
        theContentPanel.setPreferredSize(
                new Dimension(400, 300));

        if (cTool)              // add a Tool Bar?
        {
            theToolBar = new JToolBar();
            theContentPanel.add(theToolBar,BorderLayout.NORTH);
        }

        // Note: we could add a status bar (another ToolBar) at
        // the bottom by using BorderLayout.SOUTH

        theFrame.setContentPane(theContentPanel);
    }
    
    public static void addMainPane(JComponent pane)
    {
        // This will add the "user" pane to the content pane
        theContentPanel.add(pane,BorderLayout.CENTER);
    }
    
    public static void addMenu(JMenu menu)
    {
        if (theMenuBar == null)
            return;
        theMenuBar.add(menu);
    }
    
    public static void showApp()
    {
        theFrame.pack();
        theFrame.setVisible(true);
    }
    
    public boolean appClosing()
    {
        return true;  // Default behavior - close automatically
    }
}