How to make the only the Child form enabled?

[Sri Rangan]

My application is with JInterrnalFrames and JDesktopPane(Virtual desktop).
When I open up a child form, I would like to make parent form disabled.
I tried getting all InternalFrames in virtualdesktop and tried disabling it.I could get all internalframes but I could not disable them.
Any help?
Thanks
Sri

[Rene Liebmann]

Hi,
what do you mean with disabling a JInternalFrame.
Do you mean setEnabled(false)? I think, this can't work, because the components inside the frame are not disabled. You could try to work with the GlassPane. If you set the glasspane of your parent to visible, then no mouseclick would reach a component behind and the glasspane is the most top component. If your childframe is closed, then you have to set the glasspane to invisible.
Hope this helps a bit

Rene

[Sri Rangan]

Rene
Currently I am opening my child Internal frame as below:

 
//Code inside the Parent JInternalFrame
public void ok(){
//set glasspane to visible for the parent
this.getGlassPane().setVisible(true);
//open the child InternalFrame
ChildFrmae childFrame = new ChildFrame();
destop.open(childFrame);
}
 

But , when my child internal frame is open, still my parent form is enabled and editable.
Thanks
Sri

[Rene Liebmann]

Yes, you are right, and I don't know why.
So you have to make a workaround. Put all your components in a Vector and implement a setAllComponentsEnabled(boolean enable) method.
This is ugly, but it will work. Maybe someone else knows, why the glasspane doesn't work.

[Sri Rangan]

Is there a way to open the JInternal Frame as Modal. same as JDialog or JOptionPane
Thanks
Sri

[Rene Liebmann]

No, not really. But it is possible, to simulate this. I did this two years ago.
Here is the code:

  
import  java.awt.event.*;
import  javax.swing.event.*;
import  javax.swing.*;
import  java.awt.*;

public class AlwaysOnTopInternalFrame extends JInternalFrame {
    private Component reference;
    public AlwaysOnTopInternalFrame () {
        try {
            jbInit();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public AlwaysOnTopInternalFrame (Component c) {
        this();
        this.reference = c;
    }
    private void jbInit () throws Exception {
        this.addInternalFrameListener(new AlwaysOnTopInternalFrame_this_internalFrameAdapter(this));
        this.setResizable(true);
    }
    void this_internalFrameDeactivated (InternalFrameEvent e) {
        this.toFront();
    }
    public boolean mustBeTop (Component c) {
        if (this.reference == null || c == null)
            return  true;
        return  (c.equals(this.reference));
    }
}

class AlwaysOnTopInternalFrame_this_internalFrameAdapter extends javax.swing.event.InternalFrameAdapter {
    AlwaysOnTopInternalFrame adaptee;
AlwaysOnTopInternalFrame_this_internalFrameAdapter (AlwaysOnTopInternalFrame adaptee) {
        this.adaptee = adaptee;
    }
    public void internalFrameDeactivated (InternalFrameEvent e) {
        adaptee.this_internalFrameDeactivated(e);
    }
}

This is not modal, but it is alway on top.

[Sri Rangan]

Rene
Thanks you very much for the code
I tried opening AlwaysOnTopInternalFrame class from my Partent Internal Frame and as desired I could not edit my Parent Form.
1) But when I clicked on the Parent form, AlwaysOnTopInternalFrame goes behind the Parent form
2) And When I close the AlwaysOnTopInternalFrame, my parent form is still non-editable.
Do I have to do anything different?
Thanks for your time Rene
Sri

[Rene Liebmann]

I found it. My AlwaysOnTop.. worked, but the toFront() method of it was called earlier than the toFront method of the parent frame.
So I added following code to the parent frame:

  
this.addInternalFrameListener(new javax.swing.event.InternalFrameAdapter() {
      public void internalFrameActivated(InternalFrameEvent e) {
        this_internalFrameActivated(e);
      }
    });
....
void this_internalFrameActivated(InternalFrameEvent e) {
    if (childFrame == null) return;
    this.toBack();
  }

In other words, I added a InternalFrameListener and in the implementation of it I ask if we have a child frame (which must be a member). If no then we have nothing to do and if yes, we send it to back.
But anyway, I think it will not solve your problem, because the parent frame is editable.
So I think you have to implement a recursive setComponentEnabled method for your internal frames. This you could merge with the AlwaysOnTopInternalFrame.

  
public void setComponentEnabled(boolean b, JComponent c){
    c.setEnabled(b);
    for (int i = 0; i < c.getComponentCount(); i++) {
      JComponent child = (JComponent)c.getComponent(i);
      setComponentEnabled(b, child);
    }
  }

[Sri Rangan]

Rene
It looks like implementing setEnabledComponents() is the only option to disable and enable the Parent and Child Internalfrmaes though it does not seem sleek.
Now I am calling setEnabledComponents() right after my parent form open the child internalframe. But When I close my child form, how can I enable my parent form components.
Passing the parent form reference to the child form when the child form is open so that when the child form is closed I can use the parent for reference to call setEnabledComponents() method.
Thanks
Sri

[Rene Liebmann]

Ok, this is easy. As you already have a InternalFrameListener in your parent for your child, it is easy for you to listen for the internalFrameClosing event. There you can call the method setComponentEnabled(true).

[Sri Rangan]

Rene
Thanks for your help.
I implemented the internalFrameClosing() on the Parent Frame and calling setComponentEnabled(true). But when my child form is closed, how the internalFrameClosing event on the Parent form will be fired. This event will be fired only when the parent form is closed. Am I missing something?
Sri

[Rene Liebmann]

Maybe my last post sounds a bit confusing. I mean, that your parent form has to implement a InternalFrameListener for the child form. Only then your parent is able to know when your child form is closing.

  
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;

public class MyJInternalFrame extends JInternalFrame {
  JToolBar jToolBar1 = new JToolBar();
  JButton jButton1 = new JButton();
  JScrollPane jScrollPane1 = new JScrollPane();
  JTextArea jTextArea1 = new JTextArea();
  JDesktopPane desktop = null;
  AlwaysOnTopInternalFrame childFrame = null;
  public MyJInternalFrame() {
  super();
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  public void setDesktop(JDesktopPane desktop) {
    this.desktop = desktop;
  }
  private void jbInit() throws Exception {
    jButton1.setText("Create Child");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
    jTextArea1.setText("Can you edit me?");
    this.addInternalFrameListener(new javax.swing.event.InternalFrameAdapter() {
      public void internalFrameActivated(InternalFrameEvent e) {
        this_internalFrameActivated(e);
      }
    });
    this.getContentPane().add(jToolBar1, BorderLayout.NORTH);
    this.getContentPane().add(jScrollPane1, BorderLayout.CENTER);
    jScrollPane1.getViewport().add(jTextArea1, null);
    jToolBar1.add(jButton1, null);
  }
  void jButton1_actionPerformed(ActionEvent e) {
    //set glasspane to visible for the parent
    this.getGlassPane().setVisible(true);
    this.getGlassPane().setCursor(new Cursor(Cursor.WAIT_CURSOR));
    //jTextArea1.setEnabled(false);
    //this.getGlassPane().setVisible(true);
    System.out.println(this.getGlassPane().isDisplayable());
    this.setEnabled(false);
    //open the child InternalFrame
    //MyJInternalFrame childFrame = new MyJInternalFrame();
    childFrame = new AlwaysOnTopInternalFrame(this);
    childFrame.setClosable(true);
    childFrame.addInternalFrameListener(new javax.swing.event.InternalFrameListener() {
            public void internalFrameClosed (javax.swing.event.InternalFrameEvent event) {
//this is what I mean!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//the parent (MyJInternalFrame) listens to the child frame (AlwaysOnTopInternalFrame)             
setComponentEnabled(true);
            }
            public void internalFrameDeiconified (javax.swing.event.InternalFrameEvent event) {}
            public void internalFrameDeactivated (javax.swing.event.InternalFrameEvent event) {}
            public void internalFrameIconified (javax.swing.event.InternalFrameEvent event) {}
            public void internalFrameActivated (javax.swing.event.InternalFrameEvent event) {
                   requestFocus();
            }
            public void internalFrameOpened (javax.swing.event.InternalFrameEvent event) {}
            public void internalFrameClosing (javax.swing.event.InternalFrameEvent event) {
                //showInParent();
                //jiFrame.dispose();
            }
        });
    desktop.add(childFrame);
    //childFrame.setDesktop(desktop);
    childFrame.setSize(200,200);
    childFrame.show();
  }
  void this_internalFrameActivated(InternalFrameEvent e) {
    if (childFrame == null) return;
    this.toBack();
    setComponentEnabled(false, this);
  }
   public void setComponentEnabled(boolean b){
      setComponentEnabled(b,this);
   }
  public void setComponentEnabled(boolean b, JComponent c){
    c.setEnabled(b);
    for (int i = 0; i < c.getComponentCount(); i++) {
      JComponent child = (JComponent)c.getComponent(i);
      setComponentEnabled(b, child);
    }
  }
}

If this was a homework for you, then I shoud get your mark 1.
[ June 26, 2002: Message edited by: Rene Liebmann ]

[Sri Rangan]

Thanks Rene. It worked