UIColorChooserPanel.java

package ilist.ui;


import ilist.ui.generic.components.TransparentPanel;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.Box;
import javax.swing.JComponent;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.border.EmptyBorder;

import org.jdesktop.jxlayer.JXLayer;
import org.jdesktop.jxlayer.plaf.ext.LockableUI;

import com.bric.swing.ColorPicker;

/**
 * a popup with a color wheel which allow to change the color of part of the main frame
 * @author Christophe Le Besnerais
 * {@link http://swing-fx.blogspot.com/2009/01/jrating-jtagcloud-and-gui-colorization.html}
 */
@SuppressWarnings("serial")
public class UIColorChooserPanel extends TransparentPanel {

 // the selected color :
 private Color color = Color.RED;
 

 public UIColorChooserPanel(Frame owner) {
  super(owner);
 
  this.setSize(new Dimension(230, 250));
  this.setTitle("Edit item");
 
  JPanel panel = new JPanel(true);
  panel.setOpaque(false);
  panel.add(Box.createRigidArea(new Dimension(150, 5)));
 
  final ColorPicker colorPicker = new ColorPicker(false);
  colorPicker.setBorder(new EmptyBorder(0, 0, 0,0));
  colorPicker.getColorPanel().setBorder(new EmptyBorder(0, 0, 0,0));
  colorPicker.setOpaque(false);
  colorPicker.getColorPanel().setOpaque(false);
  ((JComponent) colorPicker.getComponents()[1]).setOpaque(false);
  colorPicker.getColorPanel().setRGB(color.getRed(), color.getGreen(), color.getBlue());
  colorPicker.setPreferredSize(new Dimension(190, 150));
  colorPicker.addPropertyChangeListener(ColorPicker.SELECTED_COLOR_PROPERTY, new PropertyChangeListener() {
   public void propertyChange(PropertyChangeEvent e) {
    if (colorPicker.getColor() != null)
     color = colorPicker.getColor();
   }  
  });
  colorPicker.setAlignmentX(Component.CENTER_ALIGNMENT);
  panel.add(colorPicker);
 
  getContent().add(panel, BorderLayout.CENTER);
 }
 
 @Override
 public void setVisible(boolean visible) {
  super.setVisible(visible);
 
  if (visible) {
   // when this popup is show, create a layer which block user interaction
   // on the main frame, and detect mouse click :
   MouseEventFilterLayerUI ui = new MouseEventFilterLayerUI();
   MainFrame.getInstance().getMainLayer().setUI(ui);
  }
 }
 
 @Override
 public void dispose() {
  super.dispose();
 
  // remove the layer when closing :
  MainFrame.getInstance().getMainLayer().setUI(null);
 }
 
 
 private class MouseEventFilterLayerUI extends LockableUI {
 
  @Override
  protected void processMouseEvent(MouseEvent e, JXLayer l) {
   if (e.getID() == MouseEvent.MOUSE_RELEASED && e.getButton() == MouseEvent.BUTTON1) {
    // left click on the main frame :
    Point p  =  SwingUtilities.convertPoint(e.getComponent(), e.getPoint(), l.getView());
    setColorAt(color, p, l.getView());
   }
   
   e.consume();
  }
 
  /**
   * set the client property "color" to color for all sub-components
   * of c which are at the position p
   */
  private void setColorAt(Color color, Point p, JComponent c) {  
   for (Component component : c.getComponents()) {
    Point p2 = SwingUtilities.convertPoint(c, p, component);
    if (component instanceof JComponent && component.contains(p2)) {
     JComponent jc = (JComponent) component;
     jc.putClientProperty("color", color);
     setColorAt(color, p2, jc);
    }
   }
  }
 
 }
 
}