How to use RootPaneContainer interface

**Gajananvihari** · 23-02-2010

Hello friends,

I have to discuss one of my confusion about the java inbuilt classes. I want to be aware about the 'RootPaneContainer interface' of java. I don't have any idea about this java interface. Evan I don't know anything about it's methods. If anyone has knowledge about the RootPaneContainer interface of java, then please let me aware about that. It will be great if you provide suitable example for RootPaneContainer interface.

**Praetor** · 23-02-2010

The RootPaneContainer interface is implemented by components that have a single JRootPane child: JDialog, JFrame, JWindow, JApplet, JInternalFrame. The methods in this interface are just covers for the JRootPane properties. 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).

**Katty** · 23-02-2010

Hi,

Following java program will demonstrate you the use of RootPaneContainer interface:

Code:

import javax.swing.RootPaneContainer;
import javax.swing.SwingUtilities;

public class RootPaneContainerDM
 {

  public static Component findComponentUnderGlassPaneAt(Point p1, Component top1) {
    Component c1 = null;

    if (top1.isShowing()) {
      if (top1 instanceof RootPaneContainer)
        c1 =
        ((RootPaneContainer) top1).getLayeredPane().findComponentAt(
            SwingUtilities.convertPoint(top1, p1, ((RootPaneContainer) top1).getLayeredPane()));
      else
        c1 = ((Container) top1).findComponentAt(p1);
    }

    return c1;
  }

}

**kelfro** · 23-02-2010

I suggest you to study following methods of RootPaneContainer interface withe their parameters:

setLayeredPane(JLayeredPane lyrdPn)
setGlassPane(Component glsPane)
getRootPane()
getLayeredPane()
setContentPane(Container cntPane)
getContentPane()

**Zecho** · 23-02-2010

Hi friend,

In following java code I have used RootPaneContainer interface, review it carefully:

Code:

import javax.swing.RootPaneContainer;

public class RootPaneContainerSD extends JFrame
{
  public RootPaneContainerSD() 
  {
    super("Custom MDI: Part V");
    setSize(550,400);
    getContentPane().setBackground(new Color(254,222,142));

    setLayeredPane(new MDIPane());
   
    ImageIcon ii1 = new ImageIcon("earth.jpg");
    InnerFrame[] frames1 = new InnerFrame[5];
    for(int i1=0; i<5; i++) 
    {
      frames1[i1] = new InnerFrame("InnerFrame " + i);
      frames1[i1].setBounds(60+i1*20, 50+i*20, 300, 200);
      frames1[i1].getContentPane().add(
       new JScrollPane(new JLabel(ii1)));
      getLayeredPane().add(frames[i1]);
    }

    WindowListener l1 = new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }    }
    setVisible(true);
  }
  public static void main(String[] arngs) 
  {
    new RootPaneContainerSD();
  }
}

**Reegan** · 23-02-2010

A RootPaneContainer interface of advanced java used to access the properties JRootPane. This interface implements five interfaces namely JApplet, JJInternalFrame, JWindow, Dialog, JFrame. It's getRootPane() is used for to return JRootPane child of give component. In other word RootPaneContainer interface is very important part of the Swing GUI builder. If you want to return layeredPane then you need to use getLayeredPane() of this interface.