/**
* 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();
}
/**
* Gets the value of the <code>defaultButton</code> property, which if <code>true</code> means
* that this button is the current default button for its <code>JRootPane</code>. Most look and
* feels render the default button differently, and may potentially provide bindings to access the
* default button.
*
* @return the value of the <code>defaultButton</code> property
* @see JRootPane#setDefaultButton
* @see #isDefaultCapable
* @beaninfo description: Whether or not this button is the default button
*/
public boolean isDefaultButton() {
JRootPane root = SwingUtilities.getRootPane(this);
if (root != null) {
return root.getDefaultButton() == this;
}
return false;
}
protected void installKeyboardActions(final JRootPane root) {
SwingUtilities.replaceUIActionMap(root, getActionMap(root));
Utilities.installKeyboardActions(
root,
JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT,
"RootPane.ancestorInputMap",
"RootPane.ancestorInputMap.RightToLeft");
if (root.getDefaultButton() != null) {
loadDefaultButtonKeyBindings(root);
}
}
@Override
@Nullable
public JComponent getPreferredFocusedComponent() {
final JRootPane pane = getRootPane();
return pane != null ? pane.getDefaultButton() : null;
}
public void actionPerformed(final ActionEvent e) {
if (isEnabled() && press) {
root.getDefaultButton().doClick(25);
}
}
public boolean isEnabled() {
JButton defaultButton = root.getDefaultButton();
return (defaultButton == null) ? false : defaultButton.isEnabled();
}
