src/javajs/async/AsyncColorChooser.java

   1 package javajs.async;
   2
   3 import java.awt.Color;
   4 import java.awt.Component;
   5 import java.awt.event.ActionEvent;
   6 import java.awt.event.ActionListener;
   7 import java.beans.PropertyChangeEvent;
   8 import java.beans.PropertyChangeListener;
   9
  10 import javax.swing.JColorChooser;
  11 import javax.swing.plaf.UIResource;
  12
  13 /**
  14  * A simple Asynchronous file chooser for JavaScript; synchronous with Java.
  15  *
  16  * Allows two modes -- using an ActionListener (setAction(ActionListener) or constructor(ActionListener))
  17  *
  18  * @author Bob Hanson
  19  */
  20
  21 public class AsyncColorChooser implements PropertyChangeListener {
  22
  23         private ActionListener listener;
  24         private Color selectedColor;
  25
  26         public void showDialog(Component component, String title, Color initialColor, ActionListener listener) {
  27                 setListener(listener);
  28                 process(JColorChooser.showDialog(component, title, initialColor));
  29                 unsetListener();
  30         }
  31
  32         public Color getSelectedColor() {
  33                 return selectedColor;
  34         }
  35
  36
  37         @Override
  38         public void propertyChange(PropertyChangeEvent evt) {
  39                 // JavaScript only
  40                 Color c = (Color) evt.getNewValue();
  41
  42                 switch (evt.getPropertyName()) {
  43                 case "SelectedColor":
  44                         process(c);
  45                         break;
  46                 }
  47         }
  48
  49         private void setListener(ActionListener a) {
  50                 listener = a;
  51                 /** @j2sNative Clazz.load("javax.swing.JColorChooser");javax.swing.JColorChooser.listener = this */
  52         }
  53
  54         private void unsetListener() {
  55                 /** @j2sNative javax.swing.JColorChooser.listener = null */
  56         }
  57
  58
  59
  60         private void process(Color c) {
  61                 if (c instanceof UIResource)
  62                         return;
  63                 selectedColor = c;
  64                 listener.actionPerformed(new ActionEvent(this, c == null ? 0 : c.getRGB(), c == null ? null : c.toString()));
  65         }
  66
  67 }