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Article #1273

text editor in java

#1273
From: Vegard K�sa
Date: Mon, 01 Mar 1999 00:00
123 lines
3118 bytes
Hi,
I'm making a simple text editor and have run into some problems.
When I try to catch the events generated from a MenuItem, I don't seem to
have access to my global variables. I keep getting the message: Undefined
variable: quitItem;

Can anyone see what I'm doing wrong?

my email is: vkaasa@c2i.net

thanks,
Vegard

here's the code:


import java.awt.Panel;
import java.awt.TextArea;
import java.awt.Frame;
import java.awt.Color;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.event.*;



public class TextEditor extends Frame {


private Panel p1;
private TextArea ta;
private MenuBar bar;
private Menu fileMenu, editMenu;
public static MenuItem newItem, openItem, saveItem, saveAsItem, quitItem;
private MenuItemListener menuItemListener = new MenuItemListener();

public static void main (String [] args) {


TextEditor TextEdit = new TextEditor("Java Text Editor");
TextEdit.init();
TextEdit.setVisible(true);
}//main ends

//constructor
public TextEditor(String title){
super(title);
bar = new MenuBar();
fileMenu = new Menu("File", true);
fileMenu.add(newItem = new MenuItem("New..."));
fileMenu.add(openItem = new MenuItem("Open..."));
fileMenu.add(saveItem = new MenuItem("Save..."));
fileMenu.add(saveAsItem = new MenuItem("Save As..."));
fileMenu.addSeparator();
fileMenu.add(quitItem = new MenuItem("Quit"));
bar.add(fileMenu);

newItem.addActionListener(menuItemListener);
openItem.addActionListener(menuItemListener);
saveItem.addActionListener(menuItemListener);
saveAsItem.addActionListener(menuItemListener);
quitItem.addActionListener(menuItemListener);

}//constructor ends


public void init(){
setBackground(new Color(250,235,215));
p1 = new Panel();
add(p1);
ta = new TextArea("Welcome to TextEditor. Written in 100% pure Java.");
ta.setBackground(Color.white);
p1.add(ta);



bar.add(fileMenu);



editMenu = new Menu("Edit");
editMenu.add("Undo");
editMenu.add("Select all");
editMenu.add("Set Font");
editMenu.add("Set Font Color");
bar.add(editMenu);

setMenuBar(bar);//sets the menubar for the frame

pack();

addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent event){
System.exit(0);
}
});

}//init ends



}//class ends

class MenuItemListener implements ActionListener {

public void actionPerformed (ActionEvent e){
MenuItem item = (MenuItem) e.getSource();
System.out.println(item.getLabel());

if ( item == newItem){

System.out.println(item.getLabel());
}


if ( item == quitItem){
System.exit(0);
}
}

}//class MenuItemListener ends
Technical Details
Message-ID: <7beshp$3k2$1@romeo.dax.net>
Path: arc1-ca.pugleaf.net!unknown!not-for-mail

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From: "Vegard K�sa" <vkaasa@c2i.net>
Subject: text editor in java
Date: 1999/03/01
Message-ID: <7beshp$3k2$1@romeo.dax.net>
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