/**
* 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;
}
/**
* Called by the browser or applet viewer to inform this JApplet that it has been loaded into the
* system. It is always called before the first time that the start method is called.
*/
public void init() {
// this is a workaround for a security conflict with some browsers
// including some versions of Netscape & Internet Explorer which do
// not allow access to the AWT system event queue which JApplets do
// on startup to check access. May not be necessary with your browser.
JRootPane rootPane = this.getRootPane();
rootPane.putClientProperty("defeatSystemEventQueueCheck", Boolean.TRUE);
setLayout(new FlowLayout(FlowLayout.CENTER, 10, 10));
b1 = new Button("Choose this card");
add(b1);
b1.addActionListener(this);
// provide any initialisation necessary for your JApplet
}
private static boolean isWindowTextured(final Component c) {
if (!(c instanceof JComponent)) {
return false;
}
final JRootPane pane = ((JComponent) c).getRootPane();
if (pane == null) {
return false;
}
Object prop = pane.getClientProperty(CPlatformWindow.WINDOW_BRUSH_METAL_LOOK);
if (prop != null) {
return Boolean.parseBoolean(prop.toString());
}
prop = pane.getClientProperty(CPlatformWindow.WINDOW_STYLE);
return prop != null && "textured".equals(prop);
}