mainview.java

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/* MainView - Top level view/controller for the MovieCat
 *
 * This is the main view/controller.
 * The main view/controller interacts with the model for
 * the global commands like open and save list in a file.
 * Copyright (c) 2001, Bruce E. Wampler
 */

import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.filechooser.*;

public class MainView extends WmvcView
{
    private JFileChooser fc;	// instance of a file chooser
    private MovieEditor theMovieEditor; // instance of editor
    private MovieModel myModel;	// local copy of model reference
    
    public MainView()
    {
	myModel = (MovieModel) WmvcApp.getModel();
	myModel.addView(this);

	// Create file chooser dialog. We will tell it to open
	// in the "user.dir" directory, which will usually be
	// the "current directory" when the program was started.
	// This will let the user use the "Start In" setting 
	// on Windows, for example.

	fc = new JFileChooser(  // file chooser in current dir.
	           new File(System.getProperty("user.dir")));

	createControls(); // Create controls - menus,toolbar

	theMovieEditor = MovieEditor.getInstance();  // editor
	theMovieEditor.initialize();
    }

    public boolean closingCurrentMovie(boolean ask)
    {
	// Check if current movie has changed, ask if want to
	// save. Returns true if saved or didn't want to save,
	// false if save fails or user cancels.
	if (myModel.getEditsMade())
	{
	    if (ask)		// interactive closing
	    {
		switch (JOptionPane.showConfirmDialog(
			WmvcApp.getFrame(),
                        "The movie list has changed since you "
                        + "last saved it.\n"
		        + "Save the current movie list?",
		        "Movie List Has Changed",
		    JOptionPane.YES_NO_CANCEL_OPTION))
		{
		    case JOptionPane.NO_OPTION:
		    	return true;   // don't save, but done
		    case JOptionPane.CANCEL_OPTION:
		    case JOptionPane.CLOSED_OPTION:
			return false;
		    default:
		    	break;		// YES
		}
		if (myModel.getFile() == null)
		{
		    int retV = 
		         fc.showSaveDialog(WmvcApp.getFrame());
		    if (retV == JFileChooser.APPROVE_OPTION)
		    {
			File file = fc.getSelectedFile();
			if (!myModel.saveMoviesAs(file))
			    return false;
		 	else
			{
			    myModel.closeMovies();
			    return true;
		 	}
		    }
		    else
		    	return false;
		}
	    }
	    myModel.saveMovies();
	    myModel.closeMovies();
	}
	return true;
    }

    private void createControls()
    {
	// This is the Controller for this view. It creates the
	// menu & toolbar, and implements all the control code, 
	// mostly in anonymous WmvcExecutor classes.

	// MenuBar: File
	JMenu fileMenu = new JMenu("File");

	// File->Open Movie List
	WmvcMenuItemCtl fileOpen = new WmvcMenuItemCtl(fileMenu,
	    "Open Movie List","images/open-16.gif", 'O',
	    null /* no accel */, new WmvcExecutor()
	    {
		public void execute(ActionEvent event)
		{
		    if (!closingCurrentMovie(true))
		        return;

		    int retV = 
		          fc.showOpenDialog(WmvcApp.getFrame());
		    if (retV == JFileChooser.APPROVE_OPTION)
		    {
			File file = fc.getSelectedFile();
			myModel.openMovies(file);
		    }
		}
	    });

	// File->Save Movie List
	WmvcMenuItemCtl fileSave = new WmvcMenuItemCtl(fileMenu,
	    "Save Movie List","images/save-16.gif", 'S',
	    null /* no accel */, new WmvcExecutor()
	    {
		public void execute(ActionEvent event)
		{
		    if (myModel.getFile() == null)
		    {
			JOptionPane.showMessageDialog(
			 WmvcApp.getFrame(),
			 "No movie file name specified.\n"
		         + "Use \"Save MovieList As\" instead.",
			"No file name specified",
			JOptionPane.ERROR_MESSAGE);
		    }
		    else
			myModel.saveMovies();
		}
	    });

	// File->Save Movie List
	WmvcMenuItemCtl fileSaveAs = new WmvcMenuItemCtl(
	    fileMenu,
	    "Save Movie List As","images/gray.gif",
	    'A', null /* no accel */, new WmvcExecutor()
	    {
		public void execute(ActionEvent event)
		{
		    int retV = 
		          fc.showSaveDialog(WmvcApp.getFrame());
		    if (retV == JFileChooser.APPROVE_OPTION)
		    {
			File file = fc.getSelectedFile();
			myModel.saveMoviesAs(file);
		    }
		}
	    });

	WmvcApp.addMenu(fileMenu);	// Add to app menu

	// MenuBar: Edit
	JMenu editMenu = new JMenu("Edit");

	// Edit->Edit Current Movie
	WmvcMenuItemCtl editEdit = new WmvcMenuItemCtl(editMenu,
	    "Edit Current Movie","images/gray.gif", 'E',
	    null /* no accel */,  new WmvcExecutor()
	    {
		public void execute(ActionEvent event)
		{
		    Movie edited = theMovieEditor.showDialog(
		       WmvcApp.getFrame(), 
		       myModel.getCurrentMovie());
		    myModel.replaceCurrentMovie(edited);
		}
	    });

	// Edit->Add New Movie
	WmvcMenuItemCtl editNew = new WmvcMenuItemCtl(editMenu,
	    "Add New Movie","images/addmovie-16.gif", 'A',
	    null /* no accel */, new WmvcExecutor()
	    {
		public void execute(ActionEvent event)
		{
		    Movie blank = new Movie();
		    Movie newMovie = theMovieEditor.showDialog(
		       WmvcApp.getFrame(), blank);
		    myModel.addMovie(newMovie);
		}
	    });

	// Edit->Remove Current Movie
	WmvcMenuItemCtl editRemove = new WmvcMenuItemCtl(
	    editMenu,
	    "Remove Current Movie","images/delx.gif", 'R',
	     null /* no accel */, new WmvcExecutor()
	    {
		public void execute(ActionEvent event)
		{
		    myModel.deleteCurrentMovie();
		}
	    });

	WmvcApp.addMenu(editMenu);	// Add to app menu

	// ToolBar: Open
	WmvcTBButtonCtl toolOpen = new WmvcTBButtonCtl(
	    "Open","images/open-16.gif",
	    "Open an Existing Movie List",
	    fileOpen.getWmvcExecutor()); // reuse fileopen exec

	// ToolBar: Add
	WmvcTBButtonCtl toolAdd = new WmvcTBButtonCtl(
	    "Add Movie", "images/addmovie-16.gif",
	    "Add a new movie",
	    editNew.getWmvcExecutor()); // reuse editNew exec
    }
}