movieeditor.java

一个简单的浏览器

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

public class MovieEditor extends JDialog implements ActionListener{
	private static MovieEditor theMovieEditor=null;
	private Movie editedMovie=null;
	
	protected GridBagLayout gridbag;
	protected GridBagConstraints c;
	
	private JPanel itemPanel;
	
	private static JLabel lblTitle=new JLabel("Movie Title:");
	private static JTextField fldTitle=new JTextField(30);
	private static JLabel lblDirector=new JLabel("Director:");
	private static JTextField fldDirector=new JTextField(30);
	private static JLabel lblYear=new JLabel("Year:");
	private static JTextField fldYear=new JTextField(6);
	private static JLabel lblRating=new JLabel("Rating:");
	private static JComboBox fldRating;
	private static JLabel lblGenre=new JLabel("Genre:");
	private static JComboBox fldGenre;
	private static JLabel lblFormat=new JLabel("Format:");
	private static JComboBox fldFormat;
	private static JLabel lblLabel=new JLabel("Label:");
	private static JTextField fldLabel=new JTextField(8);
	private static JLabel lblEvaluation=new JLabel("Evaluation:");
	private static JComboBox fldEvaluation;
	private static JLabel lblComments=new JLabel("Comments:");
	private static JTextArea textArea;
	private static JButton bPrivious;
	private static JButton bNext;
	private static JButton bUpdate;
	private static JButton bRevert;
	
	private Movie movie;
	
	protected void setAndAdd(JComponent comp,int gx,int gy,int gheight,int gwidth){
		c.anchor=c.WEST;
		c.gridx=gx;
		c.gridy=gy;
		c.gridheight=gheight;
		c.gridwidth=gwidth;
		gridbag.setConstraints(comp,c);
		itemPanel.add(comp);
	}
	
	public static MovieEditor getInstance(){
		if(theMovieEditor==null){
			theMovieEditor=new MovieEditor();
		}
		return theMovieEditor;
	}
	
	public MovieEditor(){
		super(WmvcApp.getFrame(),"Edit Movie",true);
	}
	
	public void initialize(){
		itemPanel=new JPanel();
		gridbag=new GridBagLayout();
		c=new GridBagConstraints();
		itemPanel.setLayout(gridbag);
		
		itemPanel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
		//Movie Title
		setAndAdd(lblTitle,0,0,1,1);
		setAndAdd(fldTitle,1,0,1,c.REMAINDER);
		//Director
		setAndAdd(lblDirector,0,1,1,1);
		setAndAdd(fldDirector,1,1,1,c.REMAINDER);
		//Year Genre
		setAndAdd(lblYear,0,2,1,1);
		setAndAdd(fldYear,1,2,1,1);
		setAndAdd(lblGenre,2,2,1,c.RELATIVE);
		fldGenre=new JComboBox(MovieGenre.getNames());
		setAndAdd(fldGenre,3,2,1,c.REMAINDER);
		//Rating Format
		setAndAdd(lblRating,0,3,1,1);
		fldRating=new JComboBox(MovieRating.getNames());
		setAndAdd(fldRating,1,3,1,1);
		setAndAdd(lblFormat,2,3,1,c.RELATIVE);
		fldFormat=new JComboBox(MovieFormat.getNames());
		setAndAdd(fldFormat,3,3,1,c.REMAINDER);
		//Evaluation Label
		setAndAdd(lblEvaluation,0,4,1,1);
		fldEvaluation=new JComboBox(MovieEvaluation.getNames());
		setAndAdd(fldEvaluation,1,4,1,1);
		setAndAdd(lblLabel,2,4,1,c.RELATIVE);
		setAndAdd(fldLabel,3,4,1,c.REMAINDER);
		//Comment box:
		setAndAdd(lblComments,0,5,1,1);
		textArea=new JTextArea(4,30);
		JScrollPane textScroll=new JScrollPane(textArea);
		setAndAdd(textScroll,1,5,4,c.REMAINDER);
		//Command Buttons
		bRevert=new JButton("Cancel");
		bRevert.setActionCommand("revert");
		bRevert.addActionListener(this);
		setAndAdd(bRevert,2,9,1,1);
		
		bUpdate=new JButton("OK");
		bUpdate.setActionCommand("update");
		bUpdate.addActionListener(this);
		setAndAdd(bUpdate,3,9,1,1);
		
		Container contentPane=getContentPane();
		contentPane.add(itemPanel,BorderLayout.CENTER);
		pack();
	}
	
	public Movie showDialog(Component comp,Movie m){
		if(theMovieEditor==null||m==null)
			return null;
		editedMovie=null;
		movie=(Movie)m.clone();
		
		fldTitle.setText(movie.getTitle());
		fldDirector.setText(movie.getDirector());
		fldYear.setText(movie.getYear());
		fldLabel.setText(movie.getLabel());
		fldRating.setSelectedIndex(movie.getRating());
		fldGenre.setSelectedIndex(movie.getGenre());
		fldFormat.setSelectedIndex(movie.getFormat());
		fldEvaluation.setSelectedIndex(movie.getEvaluation());
		textArea.setText(movie.getComments());
		
		setLocationRelativeTo(comp);
		setVisible(true);
		//将等待直到actionPerformed调用了
		//setVisble(false)
		return editedMovie;	
	}
	
	public void actionPerformed(ActionEvent e){
		if(e.getActionCommand().equals("update")){
			movie.setTitle(fldTitle.getText());
			movie.setDirector(fldDirector.getText());
			movie.setYear(fldYear.getText());
			movie.setLabel(fldLabel.getText());
			movie.setRating(fldRating.getSelectedIndex());
			movie.setGenre(fldGenre.getSelectedIndex());
			movie.setFormat(fldFormat.getSelectedIndex());
			
			movie.setEvaluation(fldEvaluation.getSelectedIndex());
			movie.setComments(textArea.getText());
			editedMovie=movie;
			
			setVisible(false);		
		}else if(e.getActionCommand().equals("revert")){
			editedMovie=null;
			setVisible(false);
		}
	}
}