Java programming part 82 GUI : DocumentListener

Описание: Java Programming tutorial, GUI, Graphical User Interface. this tutorial is teaching. How to Add DocumentListener to an TextArea in java using the Document class.


import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

import javax.swing.*;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.Document;

public class UserFrame extends JFrame implements ActionListener, DocumentListener{
public static String name = "charles";
public static JMenuItem print;
public static JButton jb11;

public static ImageIcon icon1;
public static ImageIcon icon2;
public static ImageIcon icon3;
public static ImageIcon icon4;
public static ImageIcon icon5;
public static ImageIcon icon6;
public static ImageIcon icon7;
public static JCheckBox tbox;
public static JRadioButton rbut;

public static JTextArea area;
public static JTextArea lineNumbers;

public static JComboBox combo;
public static JList list;

UserFrame(){
setTitle("UsersFrame");
setSize(600,550);

}


public static void main(String[] args){
File dir = new File("C:");
String[] FoldersAndFiles = dir.list();

UserFrame f = new UserFrame();
JMenuBar bar = new JMenuBar();
bar.setToolTipText("this is the manu bar please use this carefully");
JToolBar tb = new JToolBar();
tb.setToolTipText("This is a too bar");
tb.setLayout(new FlowLayout());
icon1 = new ImageIcon("src\\Paint-icon.png");
icon2 = new ImageIcon("src\\stop-icon.png");
icon3 = new ImageIcon("src\\shield-icon.png");
icon4 = new ImageIcon("src\\repair-icon.png");
icon5 = new ImageIcon("src\\sunset-icon.png");
icon6 = new ImageIcon("src\\strawberry-icon.png");
icon7 = new ImageIcon("src\\girl-icon.png");

tbox = new JCheckBox("What");
rbut = new JRadioButton("Why");

area = new JTextArea();
Document doc = area.getDocument();
doc.addDocumentListener(f);

lineNumbers = new JTextArea(20,1);
lineNumbers.setBackground(Color.YELLOW);



combo = new JComboBox();
combo.addItem("Plain");
combo.addItem("Fancy");
combo.addItem("Official");
combo.addActionListener(f);

jb11 = new JButton(icon1);
jb11.addActionListener(f);
jb11.setToolTipText("this button has a tool tip, please read!");
JButton jb12 = new JButton(icon2);
JButton jb13 = new JButton(icon3);
JButton jb14 = new JButton(icon4);
JButton jb15 = new JButton(icon5);
JButton jb16 = new JButton(icon6);
JButton jb17 = new JButton(icon7);
JMenu fileMenu = new JMenu("File");
JMenu editMenu = new JMenu("Edit");
print = new JMenuItem("print name");
JMenuItem print2 = new JMenuItem("print nothen");
print.addActionListener(f);
fileMenu.add(print);
fileMenu.add(print2);
bar.add(fileMenu);
bar.add(editMenu);
f.setJMenuBar(bar);


tb.add(jb11);
tb.add(jb12);
tb.add(jb13);
tb.add(jb14);
tb.add(jb15);
tb.add(jb16);
tb.add(jb17);
//tb.add(tbox);
tb.add(rbut);
tb.add(combo);

JPanel pan = new JPanel();
JPanel pan2 = new JPanel();
pan2.setLayout(new BorderLayout());
pan.setLayout(new BorderLayout());
pan.add(tb,BorderLayout.NORTH);
pan.add(pan2,BorderLayout.CENTER);
pan2.add(area,BorderLayout.CENTER);
pan2.add(lineNumbers,BorderLayout.WEST);
JScrollPane scroll = new JScrollPane(pan);
f.add(scroll);
f.setDefaultCloseOperation(EXIT_ON_CLOSE);
f.setVisible(true);
}


@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub

Object c = (Object) e.getSource();

if(c==combo){
JComboBox cb = (JComboBox) e.getSource();
String passed = (String) cb.getSelectedItem();
System.out.println(passed);
}
if(c==jb11){
System.out.println("Charles");
}
if(c==print){
System.out.println("The menu item");
}


}


@Override
public void changedUpdate(DocumentEvent d) {
// TODO Auto-generated method stub

}


@Override
public void insertUpdate(DocumentEvent d) {
// TODO Auto-generated method stub
System.out.println(d.getType());
}


@Override
public void removeUpdate(DocumentEvent d) {
// TODO Auto-generated method stub
System.out.println(d.getType());
}
}