/**
* 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;
}