GUI'S

[Douglas McAuley]

I have attached some source code with two GUI'S in it, one of them has a button which when clicked I would like it to go to the other GUI, but unfortunately I can' t seem to find a way to achieve this, basically I am looking for a way to go from one page to the next.

Any ideas would be most welcome.

Regards Douglas
import java.awt.*;
import java.awt.event.*;
public class Test1 extends Frame implements ActionListener {
Button b = new Button("Click me");
public void ShowGui() {
this.setLayout(new FlowLayout());
b.addActionListener(this);
this.add(b);
setSize (300,300);
setVisible (true);
}
public void ShowGui2() {
setBackground(Color.red);
setSize (300,300);
setVisible (true);
}
public void actionPerformed(ActionEvent e) {
if(e.getSource() == b)
System.out.println("Hello");
}
public static void main(String args[]) {
Test1 t = new Test1();
t.ShowGui();
}
}

[Wayne L Johnson]

I don't claim that it's pretty, but it works. The "SillyPanel1" will show up initially. When you push "Next" it will show "SillyPanel2". Pushing "Next" again will close the application.

import java.awt.*;
import java.awt.event.*;
class SillyPanel1 extends Panel {
   public SillyPanel1() {
      add(new Label("First"));
      add(new TextField("First name goes here", 32));
      add(new Label(" Last"));
      add(new TextField("Last name goes here", 32));
   }
}
class SillyPanel2 extends Panel {
   public SillyPanel2() {
      add(new Label("Addr1"));
      add(new TextField("Address line 1 goes here", 32));
      add(new Label("Addr2"));
      add(new TextField("Address line 2 goes here", 32));
      add(new Label("Addr3"));
      add(new TextField("Address line 3 goes here", 32));
   }
}
public class MyFrame extends Frame {
   boolean done = false;
   Frame ff = new Frame("Try me ...");
   SillyPanel1 sp1 = new SillyPanel1();
   SillyPanel2 sp2 = new SillyPanel2();
   public MyFrame() {
      super("Try me ...");
      Button nextBtn = new Button("Next");
      sp1 = new SillyPanel1();
      sp2 = new SillyPanel2();
      nextBtn.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent ae) {
            if (done) {
               System.exit(0);
            } else {
               done = true;
               goToPanel2();
            }
         }
      });
      add(sp1, BorderLayout.CENTER);
      add(nextBtn, BorderLayout.SOUTH);
      pack();
   }
   protected void goToPanel2() {
      remove(sp1);
      add(sp2, BorderLayout.CENTER);
      pack();
   }
   public static void main(String args[]) {
      MyFrame mf = new MyFrame();
      mf.show();
   }
}

Of course the FlowLayout is an ugly layout manager in this case, but you can get the idea of what's happening. When the "Next" button is pressed, the first panel is removed and the next panel is added to the UI.
In a *real* application you might not want to create a panel until it's needed. And you'd need something other than a boolean to keep track of current state since you'd likely need more than two panels. Also, I'd put each class into a separate file for ease of maintenance.

[Douglas McAuley]

Thank you, thats an interesting way to go about it, I shall check it out.