import java.awt.*;
import Tree;
import RedBlack;
import Display;
import InfoPanel;
import CtrlPanel;

// This is the main window class. It include the control panel,
// information panel and the display. Beside that it also include
// the tree object. it is used mainly as a container of the display
// and the panels and as a mean for the objects communication.

public class MainWin extends Frame
{
   private   RedBlack  Parent;
   Display   display;
   Tree      tree; 
   CtrlPanel ctrlpanel;
   InfoPanel infopanel;
   
   // constructor create all the abjects and locate the visual ones on
   // the window.

   public MainWin(RedBlack p)
   {
      Parent     = p;
      tree       = new Tree(this);  
      display    = new Display(this);
      ctrlpanel  = new CtrlPanel(this);
      infopanel  = new InfoPanel(this);
      
      add("West",ctrlpanel);
      add("Center",display);
      add("North",infopanel);
   }
   
   // this method dispose the object and the open dialogs by calling 
   // to the Free method of the ctrlpanel.

   public void dispose()
   {
      Parent.start.enable();
      ctrlpanel.Free();     
      super.dispose();
   }
 
   // This method clear the tree, i.e. create a new tree object
   // and clear the display and the height bar.

   public void ClearTree()
   {
      tree = new Tree(this);
      display.drawTree();
      infopanel.setMessage("");
      infopanel.drawBar();
   }
     
}