/*
   
       dsh-piccolo-identify  Piccolo2D nodes for identifiable beans.
       Copyright (c) 2007-2013 held jointly by the individual authors.
   
       This library is free software; you can redistribute it and/or modify it
       under the terms of the GNU Lesser General Public License as published
       by the Free Software Foundation; either version 3 of the License, or (at
       your option) any later version.
  
      This library is distributed in the hope that it will be useful, but WITHOUT
      ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
      FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
      License for more details.
  
      You should have received a copy of the GNU Lesser General Public License
      along with this library;  if not, write to the Free Software Foundation,
      Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA.
  
      > http://www.fsf.org/licensing/licenses/lgpl.html
      > http://www.opensource.org/licenses/lgpl-license.php
  
  */
  package org.dishevelled.piccolo.identify;
  
  import java.awt.BasicStroke;
  import java.awt.Color;
  import java.awt.Paint;
  import java.awt.Shape;
  import java.awt.Stroke;
  
  import java.awt.font.FontRenderContext;
  import java.awt.font.TextLayout;
  
  import java.awt.geom.AffineTransform;
  import java.awt.geom.Point2D;
  import java.awt.geom.Rectangle2D;
  import java.awt.geom.RoundRectangle2D;
  
  import org.piccolo2d.nodes.PPath;
  
  import org.piccolo2d.util.PBounds;
  
  import org.dishevelled.iconbundle.IconSize;
  import org.dishevelled.iconbundle.IconState;
  
  /**
   * Finder-style id node.
   *
   * @author  Michael Heuer
   * @version $Revision$ $Date$
   */
  public final class FinderIdNode
      extends AbstractIdNode
  {
      /** Icon selection node. */
      private PPath iconSelection;
  
      /** Text selection node. */
      private PPath textSelection;
  
      /** Text selection shadow node. */
      private PPath textSelectionShadow;
  
      /** Text selection paint. */
      private static final Paint TEXT_SELECTION_PAINT = new Color(0, 0, 0, 100);
  
      /** Text selection selected paint. */
      private static final Paint TEXT_SELECTION_SELECTED_PAINT = new Color(56, 117, 215);
  
      /** Icon selection stroke. */
      private static final Stroke ICON_SELECTION_STROKE = new BasicStroke(2.0f);
  
      /** Icon selection stroke paint. */
      private static final Paint ICON_SELECTION_STROKE_PAINT = new Color(130, 130, 130);
  
  
      /**
       * Create a new finder-style id node.
       */
      public FinderIdNode()
      {
          this(null);
      }
  
      /**
       * Create a new finder-style id node with the specified value.
       *
       * @param value value for this id node
       */
      public FinderIdNode(final Object value)
      {
          super(value);
          createNodes();
          resetStateMachine();
      }
  
      /**
       * Create a new finder-style id node with the specified value and icon size.
      *
      * @param value value for this id node
      * @param iconSize icon size for this id node, must not be null
      */
     public FinderIdNode(final Object value, final IconSize iconSize)
     {
         super(value);
         setIconSize(iconSize);
         createNodes();
         resetStateMachine();
     }
 
 
     /**
      * Create nodes.
      */
     private void createNodes()
     {
         iconSelection = new PPath.Double();
         iconSelection.setPaint(TEXT_SELECTION_PAINT);
         iconSelection.setStroke(ICON_SELECTION_STROKE);
         iconSelection.setStrokePaint(ICON_SELECTION_STROKE_PAINT);
 
         textSelection = new PPath.Double();
         textSelection.setPaint(TEXT_SELECTION_PAINT);
         textSelection.setStroke(null);
 
         textSelectionShadow = new PPath.Double();
         textSelectionShadow.setPaint(TEXT_SELECTION_PAINT);
         textSelectionShadow.setStroke(null);
 
         addChild(iconSelection);
         addChild(textSelectionShadow);
         addChild(textSelection);
         addChild(getIconBundleImageNode());
         addChild(getNameTextNode());
     }
 
     /**
      * Normal state.
      */
     private void normal()
     {
         setTransparency(1.0f);
         getNameTextNode().setTextPaint(Color.BLACK);
         iconSelection.setVisible(false);
         textSelection.setPaint(TEXT_SELECTION_PAINT);
         textSelectionShadow.setVisible(false);
         setIconState(IconState.NORMAL);
     }
 
     /**
      * Reverse normal state.
      */
     private void reverseNormal()
     {
         setTransparency(1.0f);
         getNameTextNode().setTextPaint(Color.WHITE);
         iconSelection.setVisible(false);
         textSelection.setPaint(TEXT_SELECTION_PAINT);
         textSelectionShadow.setVisible(false);
         setIconState(IconState.NORMAL);
     }
 
     /**
      * Selected state.
      */
     private void selected()
     {
         setTransparency(1.0f);
         getNameTextNode().setTextPaint(Color.WHITE);
         iconSelection.setVisible(true);
         textSelection.setPaint(TEXT_SELECTION_SELECTED_PAINT);
         textSelectionShadow.setVisible(true);
         setIconState(IconState.NORMAL);
     }
 
     /**
      * Selected mouseover state.
      */
     private void selectedMouseover()
     {
         selected();
     }
 
     /**
      * Reverse selected state.
      */
     private void reverseSelected()
     {
         selected();
     }
 
     /**
      * Reverse selected mouseover state.
      */
     private void reverseSelectedMouseover()
     {
         selected();
     }
 
     /**
      * Dragging state.
      */
     private void dragging()
     {
         setTransparency(0.66f);
     }
 
     /**
      * Reverse dragging state.
      */
     private void reverseDragging()
     {
         dragging();
     }
 
     @Override
     protected void layoutChildren()
     {
         PBounds iconBounds = getIconBundleImageNode().getBoundsReference();
         Point2D iconCenter = iconBounds.getCenter2D();
 
         double iconSelectionMargin = Math.max(0.1d * iconBounds.getHeight(), 0.1d * iconBounds.getWidth());
         iconSelectionMargin = Math.min(iconSelectionMargin, 2.0d);
 
         Shape iconSelectionRect = new RoundRectangle2D.Double(0.0d, 0.0d,
                                                               iconBounds.getWidth() + 2.0d * iconSelectionMargin, iconBounds.getHeight() + 2.0d * iconSelectionMargin,
                                                               2.0d, 2.0d);
 
         iconSelection.reset();
         iconSelection.append(iconSelectionRect, false);
 
         PBounds iconSelectionBounds = iconSelection.getBoundsReference();
         Point2D iconSelectionCenter = iconSelectionBounds.getCenter2D();
 
         // unfortunately, the height of the text node is larger than the Mac l&f desires it to be
         //PBounds textBounds = getNameTextNode().getBoundsReference();
         // TODO:  this method doesn't support multi-line text nodes
         FontRenderContext frc = new FontRenderContext(new AffineTransform(), true, true);
         TextLayout textLayout = new TextLayout(getNameTextNode().getText(), getNameTextNode().getFont(), frc);
         Rectangle2D textBounds = textLayout.getBounds();
         Point2D textCenter = new Point2D.Double(textBounds.getCenterX(), textBounds.getCenterY());
         PBounds textNodeBounds = getNameTextNode().getBoundsReference();
         Point2D textNodeCenter = textNodeBounds.getCenter2D();
         double textHeightAdjustment = (textNodeBounds.getHeight() - textBounds.getHeight()) * 0.66d;
 
         double textSelectionWidthMargin = 8.0d;
         double textSelectionHeightTopMargin = 2.0d;
         double textSelectionHeightBottomMargin = 1.0d;
 
         Shape textSelectionRect = new RoundRectangle2D.Double(0.0d, 0.0d,
                                                               textBounds.getWidth() + 2.0d * textSelectionWidthMargin, textBounds.getHeight() + textSelectionHeightTopMargin + textSelectionHeightBottomMargin,
                                                               12.0d, 12.0d);
 
         textSelection.reset();
         textSelection.append(textSelectionRect, false);
         textSelectionShadow.reset();
         textSelectionShadow.append(textSelectionRect, false);
         PBounds textSelectionBounds = textSelection.getBoundsReference();
         Point2D textSelectionCenter = textSelectionBounds.getCenter2D();
 
         getIconBundleImageNode().setOffset(-iconCenter.getX(), -iconCenter.getY());
         iconSelection.setOffset(-iconSelectionCenter.getX(), -iconSelectionCenter.getY());
         getNameTextNode().setOffset(-textNodeCenter.getX(), iconCenter.getY() + textSelectionHeightTopMargin + textSelectionCenter.getY() - textHeightAdjustment);
         textSelection.setOffset(-textSelectionCenter.getX(), iconCenter.getY() + textSelectionCenter.getY());
         textSelectionShadow.setOffset(-textSelectionCenter.getX(), iconCenter.getY() + textSelectionCenter.getY() + 1.0d);
     }
 }