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

public class DesktopMgr extends DefaultDesktopManager {
  protected static final String RESIZING = "RESIZING";

  public void beginResizingFrame(JComponent f, int dir) {
  f.putClientProperty(RESIZING, Boolean.TRUE);
  }

  public void endResizingFrame(JComponent f) {
  f.putClientProperty(RESIZING, Boolean.FALSE);
  }

  public void setBoundsForFrame(JComponent f, int x, int y, int w, int h) {
    if(f instanceof JInternalFrame == false) {
     super.setBoundsForFrame(f, x,y,w,h);
    }
    else {
     JInternalFrame frame = (JInternalFrame)f;
     boolean resizing = false;
     Object r = frame.getClientProperty(RESIZING);
     if( r != null && r instanceof Boolean) {
        resizing = ((Boolean)r).booleanValue();
     }

    JDesktopPane desk = frame.getDesktopPane();
    Dimension d = desk.getSize();
    
    if(x<0) {
     if (resizing) w += x;
     else   x=0;
    }
    else {
      if(x+w>d.width) {
        if(resizing) w = d.width-x;
        else x = d.width-w;
      }
    }
 
    if(y<0) {
      if(resizing) h+=y;
      else y=0;
    }
    else {
      if(y+h>d.height) {
         if(resizing) h = d.height-y;
         else y=d.height-h;
      }
    }

    super.setBoundsForFrame(f,x,y,w,h);
    }
  }
}