Can't get JTextArea to gain focus in JWindow, works in JFrame

JWindow needs a parent otherwise focus won't work.

if you don't want a loose JFrame hanging around, add the indicated line

public FilterWindowTest(){

super(new JFrame(){public boolean isShowing(){return true;}});//<--

Container contentPane = getContentPane();

Michael_Dunna at 2007-7-10 3:22:36 >

Actually, I'm calling the JWindow from a JFrame, so it makes sense to call the JWindow constructor with JFrame as an argument and let the JFrame be the owner. The JFrame will be visible when the JWindow is created and shown, so according to the API, the JWindow should be focusable.

But alas, such is not my experience with the following code. Execute FilterWindowFrame's main method and you'll see a button. Click the button and you'll see the JWindow, but it is not focusable.

I tried using the no-argument constructor for the JWindow and inserting the statement

super(new JFrame(){public boolean isShowing(){return true;}});

in the constructor, and this works. The JWindow is focusable. But why won't it work with the JFrame object as the JWindow object's parent?

Here's the JFrame

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

public class FilterWindowFrame extends JFrame implements ActionListener{

public static void main(String[] args){

new FilterWindowFrame();

}

private FilterWindowFrame(){

JButton button = new JButton("Show the JWindow");

button.addActionListener(this);

getContentPane().add(button);

pack();

this.setVisible(true);

}

public void actionPerformed(ActionEvent e) {

FilterWindowTest fwt = new FilterWindowTest(this);

fwt.setVisible(true);

}

}

and here's the JWindow

import java.awt.Container;

import java.awt.Point;

import java.awt.event.MouseEvent;

import javax.swing.JFrame;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.JWindow;

public class FilterWindowTest extends JWindow {

private final int WIDTH = 200;

private final int HEIGHT = 200;

Point location;

MouseEvent pressed;

public FilterWindowTest(JFrame frame){

Container contentPane = getContentPane();

contentPane.setLayout(null);

JTextArea allowArea = new JTextArea();

allowArea.setEditable(true);

JScrollPane allowPane = new JScrollPane(allowArea);

allowArea.setBackground(contentPane.getBackground());

allowPane.setBackground(contentPane.getBackground());

allowPane.setOpaque(true);

allowArea.setOpaque(true);

allowArea.setText("This is the allow pane");

allowPane.setBounds(10, 10, 100, 100);

contentPane.add(allowPane);

this.setSize(WIDTH, HEIGHT);

this.setLocationRelativeTo(null);

allowPane.requestFocus();

}

}

MidnightJavaa at 2007-7-10 3:22:36 >