com.croftsoft.core.gui
Class ResetTextFieldKeyListener

java.lang.Object
  java.awt.event.KeyAdapter
      com.croftsoft.core.gui.ResetTextFieldKeyListener

All Implemented Interfaces:

KeyListener, EventListener

public final class ResetTextFieldKeyListener
extends KeyAdapter

Used to reset a text field upon key press after user input error.

Example:

 String  text = textField.getText ( );

 if ( "".equals ( text.trim ( ) ) )
 {
   textField.setBackground ( Color.red );

   urlTextField.setText ( "data required" );

   textField.addKeyListener (
     new ResetTextFieldKeyListener ( textField, Color.white ) );
 }
 

Upon key press detection, ResetTextFieldKeyListener will

1. remove itself as a KeyListener from the TextField,
2. set the TextField background to backgroundColor, and
3. set the TextField to defaultText.

Since:

2001-03-23

Version:

2001-03-23

Author:

David W. Croft

Constructor Summary

ResetTextFieldKeyListener(TextField textField, Color backgroundColor)
this ( textField, backgroundColor, "" );

ResetTextFieldKeyListener(TextField textField, Color backgroundColor, String defaultText)

Method Summary

void	keyPressed(KeyEvent keyEvent)

Methods inherited from class java.awt.event.KeyAdapter

keyReleased, keyTyped

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ResetTextFieldKeyListener

public ResetTextFieldKeyListener(TextField textField,
                                 Color backgroundColor,
                                 String defaultText)

ResetTextFieldKeyListener

public ResetTextFieldKeyListener(TextField textField,
                                 Color backgroundColor)

this ( textField, backgroundColor, "" );

Method Detail

keyPressed

public void keyPressed(KeyEvent keyEvent)

Specified by:

keyPressed in interface KeyListener

Overrides:

keyPressed in class KeyAdapter