Пример #1
0
 /**
  * Overrides <code>JComponent.removeNotify</code> to check if this button is currently set as the
  * default button on the <code>RootPane</code>, and if so, sets the <code>RootPane</code>'s
  * default button to <code>null</code> to ensure the <code>RootPane</code> doesn't hold onto an
  * invalid button reference.
  */
 public void removeNotify() {
   JRootPane root = SwingUtilities.getRootPane(this);
   if (root != null && root.getDefaultButton() == this) {
     root.setDefaultButton(null);
   }
   super.removeNotify();
 }
Пример #2
0
  /**
   * If inputComponent is non-null, the focus is requested on that, otherwise request focus on the
   * default value
   */
  public void selectInitialValue(JOptionPane op) {
    if (inputComponent != null) inputComponent.requestFocus();
    else {
      if (initialFocusComponent != null) initialFocusComponent.requestFocus();

      if (initialFocusComponent instanceof JButton) {
        JRootPane root = SwingUtilities.getRootPane(initialFocusComponent);
        if (root != null) {
          root.setDefaultButton((JButton) initialFocusComponent);
        }
      }
    }
  }
Пример #3
0
  private static JPanel createPanel(JFrame frame) {
    JPanel panel = new JPanel();
    JButton button = new JButton("Button");
    JButton button2 = new JButton("Button 2");
    JButton button3 = new JButton("Button 3");

    JRootPane root = frame.getRootPane();
    root.setDefaultButton(button);

    panel.add(button);
    panel.add(button2);
    panel.add(button3);

    return panel;
  }