Root Pane Containers - The Definitive Guide to Java Swing - page 233

Table 8-2. JRootPane UIResource Elements (Continued)

Property String Object Type

RootPane.defaultButtonWindowKeyBindings Object[ ]

RootPane.errorDialogBorder Border

RootPane.fileChooserDialogBorder Border

RootPane.frameBorder Border

RootPane.informationDialogBorder Border

RootPane.plainDialogBorder Border

RootPane.questionDialogBorder Border

RootPane.warningDialogBorder Border

RootPaneUI String

RootPaneContainer Interface
The RootPaneContainer interface defines the setter/getter methods for accessing the different
panes within the JRootPane , as well as accessing the JRootPane itself.

public interface RootPaneContainer {
// Properties
public Container getContentPane();
public void setContentPane(Container contentPane);
public Component getGlassPane();
public void setGlassPane(Component glassPane);
public JLayeredPane getLayeredPane();
public void setLayeredPane(JLayeredPane layeredPane);
public JRootPane getRootPane();
}

Among the predefined Swing components, the JFrame , JWindow , JDialog , JApplet , and
JInternalFrame classes implement the RootPaneContainer interface. For the most part, these
implementations simply pass along the request to a JRootPane implementation for the high-
level container. The following source code is one such implementation for the glass pane of a
RootPaneContainer implementer:

public Component getGlassPane() {
return getRootPane().getGlassPane();
}
public void setGlassPane(Component glassPane) {
getRootPane().setGlassPane(glassPane);
}

JLayeredPane Class
The JLayeredPane serves as the main component container of a JRootPane . The JLayeredPane
manages the z-order, or layering, of components within itself. This ensures that the correct