[4381] in java-interest
Beta 2 : Can't make Panels work
daemon@ATHENA.MIT.EDU (Kondratiev Dima)
Thu Dec 21 13:02:15 1995
From: Kondratiev Dima <DIMA@edge.paragraph.com>
To: Java Interest <java-interest@java.sun.com>
Date: Thu, 21 Dec 95 19:28:00 R
I am trying to make applet window change its GUI during runtime in Beta2.
I don't want to use any other Frames or Windows.
Below is a simple applet GUI which consists of two TextArea and one Button
objects.
To chage GUI I use applet removeAll() function.
In case I don't use Panels , but just TextArea and Button objects,
everything works fine.
As soon as I put these objects in Panels I see in my GUI only Button.
What am I doing wrong ? Thanks for you help.
import java.applet.Applet;
import java.awt.*;
import java.util.*;
public class GuiTest extends java.applet.Applet {
String Welcome = "Hello !";
TextArea infoArea = new TextArea(Welcome, 5, 20);
TextArea inputArea = new TextArea(5,20);
Button connectButton = new Button("Connect");
public void init() {
addNotify();
//makeConnectGui();
makeConversationGui();
}
public boolean action(Event evt, Object arg) {
System.out.println("Action !");
if(evt.target == connectButton) {
if(("Connect").equals(arg)) {
makeConnectGui();
connectButton.setLabel("Cancel");
infoArea.setText("Connecting....");
} else {
connectButton.setLabel("Connect");
infoArea.setText(Welcome);
makeConversationGui();
}
}
return true;
}
protected void makeConversationGui() {
//make conversation GUI
removeAll();
Panel infoPanel = new Panel();
Panel inputPanel = new Panel();
Panel controlPanel = new Panel();
controlPanel.add(connectButton);
//setLayout(new GridLayout(0, 1)); //rows - any nymber, cols - 1
setLayout(new BorderLayout());
/*
add("North",infoArea);
add("Center",inputArea);
add("South", connectButton);
*/
add("North",infoPanel);
add("Center",inputPanel);
add("South",controlPanel);
layout();
}
protected void makeConnectGui() {
removeAll();
setLayout(new BorderLayout());
add("North",connectButton);
add("Center",inputArea);
add("South",infoArea );
layout();
}
}
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