Name: iaR10016 Date: 04/22/2003


Filed By : J2SE-SQA [###@###.###
JDK : JDK1.5.0-b04, JDK1.4.2-b20, JDK1.4.1, JDK1.4.0
Platform[s] : all

Choice comonent popup menu has unexpected size sometimes.

The following test example creates a frame with Choice list and "deleteAll" button.
"deleteAll" button clicking calls Choice.removeAll() method for the tested choice.

Please, compile and run the test and do the following steps:

- Click "deleteAll" button.
- Click the choice. Empty popup menu appers. It does not contain any items now (this is OK!),
   but it has unexpectedly big height.

--------- test.java ---------
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class test extends JFrame {

  public test() {
    super("Choice test");

    final Choice aChoice = new Choice();
    for (int i=0; i<10; i++) aChoice.add((new Integer(i)).toString());
    getContentPane().add(aChoice,BorderLayout.CENTER);

    Button aButton = new Button("removeAll");
    aButton.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent e) { aChoice.removeAll(); }
     });
    getContentPane().add(aButton,BorderLayout.NORTH);
  }

  public static void main(String[] args) {
    JFrame frame = new test();
    frame.setSize(new Dimension(100,100));
    frame.setVisible(true);
   }
}
-----------------------------

Please, note that if items were removed one-by-one using Choice.remove(int) method
the popup menu height becomes less correspondingly and the following example
works fine:

--------- test1.java ---------
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class test1 extends JFrame {

  public test1() {
    super("Choice test 1");

    final Choice aChoice = new Choice();
    for (int i=0; i<10; i++) aChoice.add((new Integer(i)).toString());
    getContentPane().add(aChoice,BorderLayout.CENTER);

    Button aButton = new Button("remove");
    aButton.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent e) {
           for (int i=0; i<10; i++) aChoice.remove(0);
         }
     });
    getContentPane().add(aButton,BorderLayout.NORTH);
  }

  public static void main(String[] args) {
    JFrame frame = new test1();
    frame.setSize(new Dimension(100,100));
    frame.setVisible(true);
   }
  }
-----------------------------

Also please note that in both these examples popup menu is too wide:
it is expected that popup menu will have the same width as the Choice component
or will correspond to the item strings length.

This bug affects JCK1.4a api/java_awt/interactive/ChoiceTests.html#ChoiceTests runtime
interactive test.

Specific machine info:
======================
Hostname: linux-19
OS: RedHat Linux 7.3

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