git.gag.com Git - debian/openrocket/blob - core/src/net/sf/openrocket/gui/TextFieldListener.java

   1 package net.sf.openrocket.gui;
   2
   3 import java.awt.event.ActionEvent;
   4 import java.awt.event.ActionListener;
   5 import java.awt.event.FocusEvent;
   6 import java.awt.event.FocusListener;
   7
   8 import javax.swing.JTextField;
   9
  10 public abstract class TextFieldListener implements ActionListener, FocusListener {
  11         private JTextField field;
  12
  13         public void listenTo(JTextField newField) {
  14                 if (field != null) {
  15                         field.removeActionListener(this);
  16                         field.removeFocusListener(this);
  17                 }
  18                 field = newField;
  19                 if (field != null) {
  20                         field.addActionListener(this);
  21                         field.addFocusListener(this);
  22                 }
  23         }
  24
  25         public abstract void setText(String text);
  26
  27         public void actionPerformed(ActionEvent e) {
  28                 setText(field.getText());
  29         }
  30         public void focusGained(FocusEvent e) { }
  31         public void focusLost(FocusEvent e) {
  32                 setText(field.getText());
  33         }
  34
  35 }