/*
    *  XNap - A P2P framework and client.
    *
    *  See the file AUTHORS for copyright information.
    *
    *  This program is free software; you can redistribute it and/or modify
    *  it under the terms of the GNU General Public License as published by
    *  the Free Software Foundation.
    *
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *  along with this program; if not, write to the Free Software
   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.xnap.gui.component;
  
  import java.awt.Color;
  import java.awt.Component;
  import java.awt.Graphics;
  import java.awt.Insets;
  import java.awt.event.ActionEvent;
  import java.util.Enumeration;
  import java.util.Hashtable;
  
  import javax.swing.AbstractAction;
  import javax.swing.Action;
  import javax.swing.BoxLayout;
  import javax.swing.DefaultListCellRenderer;
  import javax.swing.Icon;
  import javax.swing.JButton;
  import javax.swing.JColorChooser;
  import javax.swing.JComboBox;
  import javax.swing.JList;
  import javax.swing.JPanel;
  
  import org.xnap.XNap;
  import org.xnap.gui.util.IconHelper;
  
  /***
   * Provides a panel that displays a {@link JComboBox} with predefined colors
   * and a button that can launch a {@link JColorChooser}.
   */
  public class ColorPanel extends JPanel
  {
  
      //--- Constant(s) ---
  
      //--- Data field(s) ---
  
      private Color customColor = new Color(254, 254, 254);
      private JComboBox jcbColor;
      private Hashtable namesByColor = new Hashtable();
  
      //--- Constructor(s) ---
  
      public ColorPanel(Color newColor)
      {
  		setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
  	
  		jcbColor = new JComboBox();
  		jcbColor.setRenderer(new ColorCellRenderer());
  		add(jcbColor);
  
  		namesByColor.put(Color.black, XNap.tr("Black")); 
  		namesByColor.put(Color.darkGray, XNap.tr("DarkGray")); 
  		namesByColor.put(Color.gray, XNap.tr("Gray")); 
  		namesByColor.put(Color.lightGray, XNap.tr("LightGray")); 
  		namesByColor.put(Color.blue, XNap.tr("Blue")); 
  		namesByColor.put(Color.cyan, XNap.tr("Cyan")); 
  		namesByColor.put(Color.magenta, XNap.tr("Magenta")); 
  		namesByColor.put(Color.pink, XNap.tr("Pink")); 
  		namesByColor.put(Color.red, XNap.tr("Red")); 
  		namesByColor.put(Color.orange, XNap.tr("Orange")); 
  		namesByColor.put(Color.green, XNap.tr("Green")); 
  		namesByColor.put(Color.yellow, XNap.tr("Yellow")); 
  		namesByColor.put(Color.white, XNap.tr("White"));
  
  		for (Enumeration e = namesByColor.keys(); e.hasMoreElements();) {
  			jcbColor.addItem(e.nextElement());
  		}
  		jcbColor.addItem(customColor);
  
  		JButton jb = new XNapButton(new ColorAction());
  		jb.setMargin(new Insets(1, 1, 1, 1));
  		add(jb);
  
  		setSelectedColor(newColor);
      }
  
      //--- Method(s) ---
  
      public Color getSelectedColor()
      {
  		return (Color)jcbColor.getSelectedItem();
     }
 
     /***
      * Makes sure that color is always != null.
      */
     public void setSelectedColor(Color newValue)
     {
 		if (namesByColor.get(newValue) != null) {
 			jcbColor.setSelectedItem(newValue);
 		}
 		else {
 			jcbColor.removeItem(customColor);
 			customColor = newValue;
 			jcbColor.addItem(customColor);
 			jcbColor.setSelectedItem(customColor);
 		}
     }
 
     /***
      * 
      */
     private class ColorAction extends AbstractAction {
 
         public ColorAction() 
 		{
             putValue(Action.SHORT_DESCRIPTION, 
 					 XNap.tr("Opens color selection dialog."));
 			putValue(IconHelper.XNAP_ICON, "palette_color.png");
         }
 
         public void actionPerformed(ActionEvent event) 
 		{
 			Color c = JColorChooser.showDialog(ColorPanel.this, 
 											   XNap.tr("Choose color"),
 											   getSelectedColor());
 			if (c != null) {
 				setSelectedColor(c);
 			}
 		}
 
     }
 
     protected class ColorCellRenderer extends DefaultListCellRenderer {
 
 		public ColorIcon icon = new ColorIcon(Color.white);
 
 		public Component getListCellRendererComponent
 			(JList list, Object val, int idx, boolean isSel, boolean hasFocus) 
 		{
 			super.getListCellRendererComponent
 				(list, val, idx, isSel, hasFocus);
 
 			String colorName = (String)namesByColor.get(val);
 			if (colorName == null) {
 				colorName = XNap.tr("Custom");
 			}
 			setText(colorName);
 			icon.setColor((Color)val);
 			setIcon(icon);
 
 			return this;
 		}
     }
 
     /***
      *
      */
     protected class ColorIcon implements Icon
     {
 
 		//--- Data field(s) ---
 
 		private int height = 15;
 		private int width = 15;
 		private Color color;
 
 		//--- Constructor(s) ---
 	
 		public ColorIcon(Color color)
 		{
 			this.color = color;
 		}
 	
 		//--- Method(s) ---
 
 		public int getIconHeight()
 		{
 			return height;
 		}
 
 		public int getIconWidth()
 		{
 			return width;
 		}
 
 		public void setColor(Color newValue)
 		{
 			this.color = newValue;
 		}
 	
 		public void paintIcon(Component c, Graphics g, int x, int y)
 		{
 			g.setColor(Color.black);
 			g.drawRect(x, y, width, height);
 			g.setColor(color);
 			g.fillRect(x + 1, y + 1, width - 1, height - 1);
 		}    
     }
 }