/*
 * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
 * Copyright (C) $$Year-Rel$$ The Jalview Authors
 * 
 * This file is part of Jalview.
 * 
 * Jalview 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, either version 3
 * of the License, or (at your option) any later version.
 *  
 * Jalview 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 Jalview.  If not, see <http://www.gnu.org/licenses/>.
 * The Jalview Authors are detailed in the 'AUTHORS' file.
 */
package jalview.appletgui;

import java.applet.Applet;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.LayoutManager;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.util.StringTokenizer;

import awt2swing.Canvas;
import awt2swing.Frame;

public class Tooltip // extends Canvas implements MouseListener,
       // MouseMotionListener
{
	
	
	public void setVisible(boolean b) { } // temporary only
	
	
	
  private String[] tip;

  private String lastTip = "";

  private boolean setPosition = false;

  protected Component owner;

  private Container mainContainer;

  private LayoutManager mainLayout;

  private boolean shown;

  private final int VERTICAL_OFFSET = 20;

  private final int HORIZONTAL_ENLARGE = 10;

  int fontHeight = 0;

  Image linkImage;

  FontMetrics fm;

  public Tooltip(String tip, Component owner)
  {
    this.owner = owner;
    //owner.addMouseListener(this);
    //owner.addMouseMotionListener(this);
    //setBackground(new Color(255, 255, 220));
    setTip(tip);
    java.net.URL url = getClass().getResource("/images/link.gif");
    if (url != null)
    {
      linkImage = java.awt.Toolkit.getDefaultToolkit().getImage(url);
    }
  }

//  public void PaintComponent(Graphics g)
//  {
//    int w = getSize().width;
//    int h = getSize().height;
//
//    g.drawRect(0, 0, w - 1, h - 1);
//    int lindex, x;
//    for (int i = 0; i < tip.length; i++)
//    {
//      x = 3;
//      lindex = tip[i].indexOf("%LINK%");
//      if (lindex != -1)
//      {
//        if (lindex > 0)
//        {
//          awt2swing.Util.drawString(g, tip[i].substring(0, lindex), 3, (i + 1) * fontHeight
//                  - 3);
//          x += fm.stringWidth(tip[i].substring(0, lindex) + 3);
//        }
//        g.drawImage(linkImage, x, i * fontHeight + 1, this);
//        if (lindex + 6 < tip[i].length())
//        {
//          awt2swing.Util.drawString(g, tip[i].substring(lindex + 6),
//                  x + linkImage.getWidth(this), (i + 1) * fontHeight - 3);
//        }
//      }
//      else
//      {
//        awt2swing.Util.drawString(g, tip[i], 3, (i + 1) * fontHeight - 3);
//      }
//    }
//  }

  synchronized void setTip(String tip)
  {
  	System.err.println("Tooltip: " + tip);
//    if (tip == null)
//    {
//      setTip("");
//      return;
//    }
//
//    if (lastTip.equals(tip))
//    {
//      return;
//    }
//
//    lastTip = tip;
//    setPosition = true;
//
//    fm = getFontMetrics(owner.getFont());
//    fontHeight = fm.getHeight();
//
//    int longestLine = 0;
//    StringTokenizer st = new StringTokenizer(tip, "\n");
//    this.tip = new String[st.countTokens()];
//    int index = 0;
//    while (st.hasMoreElements())
//    {
//      this.tip[index] = st.nextToken();
//      if (fm.stringWidth(this.tip[index]) > longestLine)
//      {
//        longestLine = fm.stringWidth(this.tip[index]);
//      }
//      index++;
//    }
//
//    setSize(longestLine + HORIZONTAL_ENLARGE, fontHeight * this.tip.length);
//
//    repaint();
//
  }

  void setTipLocation(MouseEvent evt)
  {
//    if (mainContainer == null || owner == null)
//    {
//      return;
//    }
//    setLocation(
//            (owner.getLocationOnScreen().x - mainContainer.getLocationOnScreen().x)
//                    + evt.getX(),
//            (owner.getLocationOnScreen().y
//                    - mainContainer.getLocationOnScreen().y + VERTICAL_OFFSET)
//                    + evt.getY());
//
//    // correction, whole tool tip must be visible
//    if (mainContainer.getSize().width < (getLocation().x + getSize().width))
//    {
//      setLocation(mainContainer.getSize().width - getSize().width,
//              getLocation().y);
//    }
  }

  private void removeToolTip()
  {
//    if (shown)
//    {
//      mainContainer.remove(0);
//      mainContainer.setLayout(mainLayout);
//      mainContainer.validate();
//    }
//    shown = false;
  }

  private void findMainContainer()
  {
    Container parent = owner.getParent();
    while (true)
    {
      if ((parent instanceof Applet) || (parent instanceof Frame))
      {
        mainContainer = parent;
        break;
      }
      else
      {
        parent = parent.getParent();
      }
    }
    mainLayout = mainContainer.getLayout();
  }

  public void mouseEntered(MouseEvent me)
  {
    setTipLocation(me);
  }

  public void mouseExited(MouseEvent me)
  {
    removeToolTip();
  }

  public void mousePressed(MouseEvent me)
  {
    removeToolTip();
  }

  public void mouseReleased(MouseEvent me)
  {
  }

  public void mouseClicked(MouseEvent me)
  {
  }

  public void mouseMoved(MouseEvent me)
  {
    if (!shown)
    {
//      findMainContainer();
//      mainContainer.setLayout(null);
//      mainContainer.add(this, 0);
//      mainContainer.validate();
//      shown = true;
      setTipLocation(me);
    }
    else if (setPosition)
    {
      setTipLocation(me);
//      setPosition = false;
    }
  }

  public void mouseDragged(MouseEvent me)
  {
  }
}