getContentPane() is generally implemented
like this:
public Container getContentPane() {
return getRootPane().getContentPane();
}
This interface serves as a marker for Swing GUI builders
that need to treat components like JFrame, that contain a
single JRootPane, specially. For example in a GUI builder,
dropping a component on a RootPaneContainer would be interpreted
as frame.getContentPane().add(child).
As a convenience, the standard classes that implement this interface
(such as JFrame, JDialog, JWindow,
and JInternalFrame) have their add, remove,
and setLayout methods overridden, so that they delegate calls
to the corresponding methods of the ContentPane.
For example, you can add a child component to a frame as follows:
frame.add(child);
instead of:
frame.getContentPane().add(child);
The behavior of the add and
setLayout methods for
JFrame, JDialog, JWindow,
and JInternalFrame is controlled by
the rootPaneCheckingEnabled property. If this property is
true (the default), then calls to these methods are
forwarded to the contentPane; if false, these
methods operate directly on the RootPaneContainer. This
property is only intended for subclasses, and is therefore protected.
JRootPane, JFrame, JDialog, JWindow, JInternalFrame
| Modifier and Type | Method and Description |
|---|---|
| public Container | |
| public Component | |
| public JLayeredPane | |
| public JRootPane | Returns: this components single JRootPane child.Return this component's single JRootPane child. |
| public void | setContentPane(Container
the Container to use for the contents of this
JRootPane contentPane)The "contentPane" is the primary container for application specific components. |
| public void | setGlassPane(Component
the glass pane glassPane)The glassPane is always the first child of the rootPane and the rootPanes layout manager ensures that it's always as big as the rootPane. |
| public void | setLayeredPane(JLayeredPane
the layered pane layeredPane)A Container that manages the contentPane and in some cases a menu bar. |
| getContentPane | back to summary |
|---|---|
| public Container getContentPane() Returns the contentPane.
| |
| getGlassPane | back to summary |
|---|---|
| public Component getGlassPane() Returns the glassPane.
| |
| getLayeredPane | back to summary |
|---|---|
| public JLayeredPane getLayeredPane() Returns the layeredPane.
| |
| getRootPane | back to summary |
|---|---|
| public JRootPane getRootPane() Return this component's single JRootPane child. A conventional implementation of this interface will have all of the other methods indirect through this one. The rootPane has two children: the glassPane and the layeredPane. | |
| setContentPane | back to summary |
|---|---|
| public void setContentPane(Container contentPane) The "contentPane" is the primary container for application specific components. Applications should add children to the contentPane, set its layout manager, and so on. The contentPane may not be null.
Generally implemented with
| |
| setGlassPane | back to summary |
|---|---|
| public void setGlassPane(Component glassPane) The glassPane is always the first child of the rootPane and the rootPanes layout manager ensures that it's always as big as the rootPane. By default it's transparent and not visible. It can be used to temporarily grab all keyboard and mouse input by adding listeners and then making it visible. by default it's not visible. The glassPane may not be null.
Generally implemented with
| |
| setLayeredPane | back to summary |
|---|---|
| public void setLayeredPane(JLayeredPane layeredPane) A Container that manages the contentPane and in some cases a menu bar. The layeredPane can be used by descendants that want to add a child to the RootPaneContainer that isn't layout managed. For example an internal dialog or a drag and drop effect component. The layeredPane may not be null. Generally implemented with getRootPane().setLayeredPane(layeredPane);
| |