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Using the JOptionPane.showConfirmDialog with a customized component (JPanel), I like to have focus on a specific component (JPasswordField) as it opens. How can this be achieved?
Code example: The JPasswordField pf should have focus when dialogs open...
import java.awt.BorderLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
public class JTestOptionDialog {
public static void main(String[] args) {
JFrame frame = new JFrame("Test showConfirmDialog");
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(new JPanel());
frame.setLocationRelativeTo(null);
frame.setVisible(true);
JLabel label = new JLabel("<html><body>To access insert <b>password</b></body></html>");
JPasswordField pf = new JPasswordField();
JPanel panel = new JPanel(new GridBagLayout());
panel.add(label,new GridBagConstraints(0, 0, 1, 1, 1.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(2, 2, 2, 2), 0, 0));
panel.add(pf,new GridBagConstraints(0, 1, 1, 1, 1.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(2, 2, 2, 2), 0, 0));
pf.requestFocus(); //THIS IS WHAT I LIKE TO HAVE FOCOUS WHEN DIALOG OPENS
int retVal = JOptionPane.showConfirmDialog(frame,panel,"Impostazioni",JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);
System.out.println(retVal);
}
}
Is it possible in someway to request focus on my desired JPasswordField pf or do I need to "To create and use an JOptionPane directly"?
As a note I have tried with (what seemed logical)
pf.addComponentListener(new ComponentAdapter(){
public void componentShown(ComponentEvent ce){
pf.requestFocus(); //pf.requestFocusInWindow();
}
});
But no luck with this either...
222
I found a way by adding and removing a listener but I don't really like it. I am open to better solutions.
pf.addAncestorListener(new AncestorListener() {
public void ancestorRemoved(AncestorEvent event) {}
public void ancestorMoved(AncestorEvent event) {}
public void ancestorAdded(final AncestorEvent event) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
event.getComponent().requestFocusInWindow();
event.getComponent().removeAncestorListener(this);
}
});
}
});
You are very close to the solution with your own answer. You are right though that adding/removing is messy. This is a bit neater.
Try this:
pf.addAncestorListener(new AncestorListener() {
@Override
public void ancestorRemoved(AncestorEvent event) {}
@Override
public void ancestorMoved(AncestorEvent event) {}
@Override
public void ancestorAdded(AncestorEvent event) {
event.getComponent().requestFocusInWindow();
}
});
And make sure you put that code before you call JOptionPane.showConfirmDialog()
I found the answer here if you want more information Setting component focus in JOptionPane.showOptionDialog()
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