/*
* Jalview - A Sequence Alignment Editor and Viewer
* Copyright (C) 2005 AM Waterhouse, J Procter, G Barton, M Clamp, S Searle
*
* 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; either version 2
* of the License, or (at your option) any later version.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
*/

package jalview.appletgui;

import java.awt.*;
import jalview.datamodel.*;
import jalview.analysis.*;
public class IdCanvas extends Panel
{
  protected AlignViewport av;

  protected boolean showScores  = true;

  protected int     maxIdLength = -1;
  protected String  maxIdStr    = null;
  Image image;
  Graphics gg;
  int imgHeight=0;
  boolean fastPaint = false;

  java.util.Vector searchResults;

  public IdCanvas(AlignViewport av)
  {
    setLayout(null);
    this.av         = av;
    PaintRefresher.Register(this);
  }

  public void drawIdString(Graphics gg,SequenceI s,int i, int starty, int ypos) {
      int charHeight = av.getCharHeight();

      if(searchResults!=null && searchResults.contains(s))
      {
        gg.setColor(Color.black);
        gg.fillRect(0,AlignmentUtil.getPixelHeight(starty,i,charHeight)+ ypos,getSize().width,charHeight);
        gg.setColor(Color.white);
      }
      else if (av.getSelectionGroup()!=null && av.getSelectionGroup().sequences.contains(s)) {
	  gg.setColor(Color.lightGray);
	  gg.fillRect(0,AlignmentUtil.getPixelHeight(starty,i,charHeight)+ ypos,getSize().width,charHeight);
	  gg.setColor(Color.white);
      } else {
	  gg.setColor(s.getColor());
	  gg.fillRect(0,AlignmentUtil.getPixelHeight(starty,i,charHeight)+ ypos,getSize().width,charHeight);
	  gg.setColor(Color.black);
      }

      String string = s.getName();
      if(av.getShowFullId())
        string = s.getDisplayId();

      gg.drawString(string,0,AlignmentUtil.getPixelHeight(starty,i,charHeight) + ypos + charHeight-   (charHeight/5));

  }

  public void fastPaint(int vertical)
  {
    if(gg==null)
    {  repaint(); return;}

    gg.copyArea( 0,0, getSize().width, imgHeight, 0, -vertical*av.charHeight );

    int ss=av.startSeq, es=av.endSeq, transY = 0;
    if (vertical > 0) // scroll down
     {
       ss = es - vertical;
       if(ss<av.startSeq) // ie scrolling too fast, more than a page at a time
         ss = av.startSeq;
       else
         transY = imgHeight - vertical * av.charHeight;
     }
     else if (vertical < 0)
     {
       es = ss - vertical;
       if(es > av.endSeq)
         es = av.endSeq;
     }



        gg.translate(0, transY);

        drawIds(ss, es);

        gg.translate( 0, -transY );


      fastPaint = true;
      repaint();
  }

  public void update(Graphics g)
  {
    paint(g);
  }
  public void paint(Graphics g)
  {
    if(getSize().height<0 || getSize().width<0)
      return;
    if (fastPaint)
    {
      fastPaint = false;
      g.drawImage(image, 0, 0, this);
      return;
    }

    imgHeight = getSize().height;
    imgHeight -= imgHeight % av.charHeight;

    if (imgHeight<1)
      return;

    if(image==null || imgHeight!=image.getHeight(this))
    {
      image = createImage(getSize().width, imgHeight);
      gg = image.getGraphics();
      gg.setFont(av.getFont());
    }

      //Fill in the background
      gg.setColor(Color.white);
      Font italic = new Font(av.getFont().getName(), Font.ITALIC,
                           av.getFont().getSize());
      gg.setFont(italic);

    gg.fillRect(0, 0, getSize().width, getSize().height);
    drawIds( av.getStartSeq(), av.endSeq);
    g.drawImage(image, 0, 0, this);
  }

  void drawIds(int starty, int endy)
  {
    Color currentColor     = Color.white;
    Color currentTextColor = Color.black;

    if (av.getWrapAlignment())
    {

          int rowSize =  av.getEndRes() - av.getStartRes();
          // Draw the rest of the panels

          for(int ypos=2*av.charHeight, row=av.startRes;
              ypos <= getSize().height && row<av.alignment.getWidth();
              ypos += av.chunkHeight, row+=rowSize )
          {
            for (int i = starty; i < av.alignment.getHeight(); i++)
            {
              SequenceI s = av.alignment.getSequenceAt(i);
              drawIdString(gg, s, i, 0, ypos);
            }
          }


    } else
    {

      //Now draw the id strings
      for (int i = starty; i < endy; i++)
      {
        // Selected sequence colours

        if(searchResults!=null && searchResults.contains(av.alignment.getSequenceAt(i)))
        {
          gg.setColor(Color.black);
          currentColor = Color.black;
          currentTextColor = Color.white;
      }
      else if (av.getSelectionGroup()!= null
            && av.getSelectionGroup().sequences.contains(av.alignment.getSequenceAt(i)))
        {
          currentColor = Color.lightGray;
          currentTextColor = Color.black;
        }
        else
        {
          currentColor = av.alignment.getSequenceAt(i).getColor();
          currentTextColor = Color.black;
        }

        gg.setColor(currentColor);

        gg.fillRect(0,
                    AlignmentUtil.getPixelHeight(starty, i, av.charHeight),
                    getSize().width,
                    av.charHeight);

        gg.setColor(currentTextColor);
        String string = av.alignment.getSequenceAt(i).getName();
        if(av.getShowFullId())
          string = av.alignment.getSequenceAt(i).getDisplayId();
        gg.drawString(string, 0,
                      AlignmentUtil.getPixelHeight(starty, i, av.charHeight) +
                      av.charHeight - (av.charHeight / 5));
      }

      // add a border
      gg.setColor(Color.white);
      gg.fillRect(getSize().width-4,0,4,getSize().height);
    }

  }

  public void setHighlighted(java.util.Vector found)
  {
    searchResults = found;
    repaint();
  }
}