Java KeyBindings with JFileChooser

Question

I would like to add Key bindings to my JFileChooser in order to open a file preview window when the SPACE key is pressed.

Because of the source code is too big, I just did a simple dirty code :

MainWindow.java

package test;

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

public class MainWindow extends JFrame {    
    public MainWindow() {
        this.setTitle("Test Window");
        Dimension dim = new Dimension(800, 600);
        this.setSize(dim);
        this.setPreferredSize(dim);

        MainPanel pane = new MainPanel(dim);

        Action damned = new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JOptionPane.showMessageDialog(null,
                    "It Works !");
            }
        };

        pane.getInputMap().put(KeyStroke.getKeyStroke("SPACE"), "damned");
        pane.getActionMap().put("damned", damned);

        this.setContentPane(pane);
        this.setVisible(true);
    }
}

MainPanel.java

package test;

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

public class MainPanel extends JFileChooser { 
    public MainPanel(Dimension dim) {  
        this.setSize(dim);
        this.setPreferredSize(dim);    
    }
}

Test.java

package test;

public class Test {
    public static void main(String[] args) {
        new MainWindow();
    }
}

If I use a JPanel instead of a JFileChooser, it works.

Thank you,

Revan

Badmouth

Answer 1

the problem is the type of InputMap: by default (that is without parameter), that's WHEN_FOCUSED. As the chooser itself is rarely focused, the binding will not be found. Instead bind in WHEN_ANCESTOR...

       pane.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT)
           .put(KeyStroke.getKeyStroke("F1"), "damned");

As you see here, I replaced the SPACE by F1: the space is needed (and thus eaten) by the textfield which takes the name input

Unreality

What if you wanted to replace the SPACE key anyway? How could you do that? – Bowden

Answer 2

Try to override method

protected JDialog createDialog(Component parent)

and add your action to the dialog obtained from

super.createDialog(...)

dialog.getContentPane();

Throckmorton