user enable MenuItem

Hi, guys!

I'm programming to solve a 3X3 Rubik's Cube using Evolutionary Algorithm. Now there's another problem with GUI.

I want to enable MenuItem mi1_3 (back) after MenuItem mi1_1(initialise) is clicked.

Thanks!

The structure of my program:

Code:

---

public class test extends Frame implements ActionListener {
  public static void main(String[] args)  {new test();}
  test()
  {
          super("Rubik's Cube");
          AnimCube obj = new AnimCube();
          MenuBar mb;
          Menu m1;
          MenuItem mi1_1,mi1_2,mi1_3;
          addWindowListener(new WindowAdapter()
      {public void windowClosing(
              WindowEvent e){System.exit(0);}});
          //Build the menu bar
          mb = new MenuBar();
          setMenuBar(mb);
          //Build menus in the menu bar
          m1 = new Menu("Menu 1");
          mb.add(m1);
          mi1_1 = new MenuItem("initialise");
          m1.add(mi1_1);
          mi1_2 = new MenuItem("solve");
          m1.add(mi1_2);
          mi1_3 = new MenuItem("back");
          m1.add(mi1_3);
          mi1_1.setActionCommand("init");
          mi1_2.setActionCommand("solve");
          m1.add(mi1_3);
          mi1_3.setActionCommand("back");
          mi1_1.addActionListener(obj);
          mi1_2.addActionListener(obj);
          mi1_3.addActionListener(obj);
          setSize(600,500);
          add("Center",new AnimCube());
          setVisible(true);
  }
/**
* This class deals with solving a scrambled Cube, 3d-projections ..
*/
  class AnimCube extends Panel
      implements Runnable, MouseListener, MouseMotionListener {
      public void paint(Graphics g) {
        .....
      }
        public void mouseExited(MouseEvent e) {
        .....
        }
        public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub
        if(e.getActionCommand()=="init"){
          c = Random_Run_Cube_3();
          repaint();
        }
        else if(e.getActionCommand()=="back"){
                clear();
                repaint();
        }
        else if(e.getActionCommand()=="solve") {
          Solving_Cube_Final_3(c);
          sol_ena = false;
        }
       
}

---

First, disable m1_3 right after you init it in test(), and then in the actionPerformed() branch for m1_1, call m1_3.setEnabled(true).

Quote:

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Originally Posted by NRitH

First, disable m1_3 right after you init it in test(), and then in the actionPerformed() branch for m1_1, call m1_3.setEnabled(true).

---

But how can you get the instance of the class for m1_3 in the actionPerformed() branch?

Quote:

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Originally Posted by Coiby

But how can you get the instance of the class for m1_3 in the actionPerformed() branch?

---

change into global declaration area...

Code:

---

import java.awt.*;import java.awt.event.*;
public class test extends Frame {
 MenuItem mi1_1,mi1_2,mi1_3;
  public static void main(String[] args)  {new test();}
  test()
  {
  super("Rubik's Cube");
          AnimCube obj = new AnimCube();
          MenuBar mb;
          Menu m1;
          addWindowListener(new WindowAdapter()
      {public void windowClosing(
              WindowEvent e){System.exit(0);}});
          //Build the menu bar
          mb = new MenuBar();
          setMenuBar(mb);
          //Build menus in the menu bar
          m1 = new Menu("Menu 1");
          mb.add(m1);
          mi1_1 = new MenuItem("initialise");
          m1.add(mi1_1);
          mi1_2 = new MenuItem("solve");
          m1.add(mi1_2);
          mi1_3 = new MenuItem("back");
          mi1_3.setEnabled(false);
          m1.add(mi1_3);
          mi1_1.setActionCommand("init");
          mi1_2.setActionCommand("solve");
          m1.add(mi1_3);
          mi1_3.setActionCommand("back");
          mi1_1.addActionListener(obj);
          mi1_2.addActionListener(obj);
          mi1_3.addActionListener(obj);
          setSize(600,500);
          add("Center",new AnimCube());
          setVisible(true);
  }       
/**
* This class deals with solving a scrambled Cube, 3d-projections ..
*/
  class AnimCube extends Panel
      implements  ActionListener {
      public void paint(Graphics g) {
      // .....
      }
        public void mouseExited(MouseEvent e) {
        //.....
        }
      public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub
        if(e.getActionCommand()=="init"){
System.out.println("in");
 mi1_3.setEnabled(true);

          // c = Random_Run_Cube_3();
          repaint();
        }
        else if(e.getActionCommand()=="back"){
                //clear();
System.out.println("ba");
                repaint();
        }
        else if(e.getActionCommand()=="solve") {
System.out.println("ss");
          //Solving_Cube_Final_3(c);
          //sol_ena = false;
        }
}
  }
}

---

please try refer Java API Docs

Quote:

---

Originally Posted by Dinesh_rockz

change into global declaration area...

Code:

---

import java.awt.*;import java.awt.event.*;
public class test extends Frame {
 MenuItem mi1_1,mi1_2,mi1_3;
  public static void main(String[] args)  {new test();}
  test()
  {
  super("Rubik's Cube");
          AnimCube obj = new AnimCube();
          MenuBar mb;
          Menu m1;
          addWindowListener(new WindowAdapter()
      {public void windowClosing(
              WindowEvent e){System.exit(0);}});
          //Build the menu bar
          mb = new MenuBar();
          setMenuBar(mb);
          //Build menus in the menu bar
          m1 = new Menu("Menu 1");
          mb.add(m1);
          mi1_1 = new MenuItem("initialise");
          m1.add(mi1_1);
          mi1_2 = new MenuItem("solve");
          m1.add(mi1_2);
          mi1_3 = new MenuItem("back");
          mi1_3.setEnabled(false);
          m1.add(mi1_3);
          mi1_1.setActionCommand("init");
          mi1_2.setActionCommand("solve");
          m1.add(mi1_3);
          mi1_3.setActionCommand("back");
          mi1_1.addActionListener(obj);
          mi1_2.addActionListener(obj);
          mi1_3.addActionListener(obj);
          setSize(600,500);
          add("Center",new AnimCube());
          setVisible(true);
  }       
/**
* This class deals with solving a scrambled Cube, 3d-projections ..
*/
  class AnimCube extends Panel
      implements  ActionListener {
      public void paint(Graphics g) {
      // .....
      }
        public void mouseExited(MouseEvent e) {
        //.....
        }
      public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub
        if(e.getActionCommand()=="init"){
System.out.println("in");
 mi1_3.setEnabled(true);

          // c = Random_Run_Cube_3();
          repaint();
        }
        else if(e.getActionCommand()=="back"){
                //clear();
System.out.println("ba");
                repaint();
        }
        else if(e.getActionCommand()=="solve") {
System.out.println("ss");
          //Solving_Cube_Final_3(c);
          //sol_ena = false;
        }
}
  }
}

---

please try refer Java API Docs

---

I've find the way:) Just pass MenuItem mi1_2 as the parameter for the AnimCube class, then AnimCUbe can get the instant of MenuItem mi1_2.

Thanks anyway!

Quote:

---

Originally Posted by Dinesh_rockz

change into global declaration area...

Code:

---

import java.awt.*;import java.awt.event.*;
public class test extends Frame {
 MenuItem mi1_1,mi1_2,mi1_3;
  public static void main(String[] args)  {new test();}
  test()
  {
  super("Rubik's Cube");
          AnimCube obj = new AnimCube();
          MenuBar mb;
          Menu m1;
          addWindowListener(new WindowAdapter()
      {public void windowClosing(
              WindowEvent e){System.exit(0);}});
          //Build the menu bar
          mb = new MenuBar();
          setMenuBar(mb);
          //Build menus in the menu bar
          m1 = new Menu("Menu 1");
          mb.add(m1);
          mi1_1 = new MenuItem("initialise");
          m1.add(mi1_1);
          mi1_2 = new MenuItem("solve");
          m1.add(mi1_2);
          mi1_3 = new MenuItem("back");
          mi1_3.setEnabled(false);
          m1.add(mi1_3);
          mi1_1.setActionCommand("init");
          mi1_2.setActionCommand("solve");
          m1.add(mi1_3);
          mi1_3.setActionCommand("back");
          mi1_1.addActionListener(obj);
          mi1_2.addActionListener(obj);
          mi1_3.addActionListener(obj);
          setSize(600,500);
          add("Center",new AnimCube());
          setVisible(true);
  }       
/**
* This class deals with solving a scrambled Cube, 3d-projections ..
*/
  class AnimCube extends Panel
      implements  ActionListener {
      public void paint(Graphics g) {
      // .....
      }
        public void mouseExited(MouseEvent e) {
        //.....
        }
      public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub
        if(e.getActionCommand()=="init"){
System.out.println("in");
 mi1_3.setEnabled(true);

          // c = Random_Run_Cube_3();
          repaint();
        }
        else if(e.getActionCommand()=="back"){
                //clear();
System.out.println("ba");
                repaint();
        }
        else if(e.getActionCommand()=="solve") {
System.out.println("ss");
          //Solving_Cube_Final_3(c);
          //sol_ena = false;
        }
}
  }
}

---

please try refer Java API Docs

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Sorry I just don't notice this reply. It's a good way to take AnimCube class as inner class for Rubik. Thanks!