package jalview.gui;

import java.awt.*;
import java.awt.Graphics2D.*;

import javax.swing.*;
import jalview.datamodel.*;
import jalview.analysis.*;
public class IdCanvas extends JPanel
{
  protected AlignViewport av;

  public boolean paintFlag   = false;
  protected boolean showScores  = true;

  protected int     maxIdLength = -1;
  protected String  maxIdStr    = null;

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

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

      if (av.getSelection().contains(ds)) {
	  gg.setColor(Color.lightGray);
	  gg.fillRect(0,AlignmentUtil.getPixelHeight(starty,i,charHeight)+ ypos,getWidth(),charHeight);
	  gg.setColor(Color.white);
      } else {
	  gg.setColor(ds.getColor());
	  gg.fillRect(0,AlignmentUtil.getPixelHeight(starty,i,charHeight)+ ypos,getWidth(),charHeight);
	  gg.setColor(Color.black);
      }

      String string = ds.getName() + "/" + ds.getStart() + "-" + ds.getEnd();

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

  }

  public void paintComponent(Graphics gg) {
    AlignmentI da         = av.getAlignment();
    int        charHeight = av.getCharHeight();
    gg.setFont(av.getFont());

    //Fill in the background
    gg.setColor(Color.white);
    gg.fillRect(0,0,getWidth(),getHeight());

    Color currentColor     = Color.white;
    Color currentTextColor = Color.black;

    //Which ids are we printing
    int starty = av.getStartSeq();
    int endy   = av.endSeq;

    if (av.getWrapAlignment())
    {
          // Draw the rest of the panels
          int chunkHeight =  (da.getHeight() + 2)*av.charHeight;
          int row = av.getStartRes() / av.chunkWidth ;
          for(int ypos=2*av.charHeight;
              ypos <= getHeight() && row*av.chunkWidth<da.getWidth();
              ypos += chunkHeight, row++ )
          {
            for (int i = starty; i < av.alignment.getHeight(); i++)
            {
              SequenceI s = da.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 (av.getSelection().contains(da.getSequenceAt(i)))
        {
          currentColor = Color.lightGray;
          currentTextColor = Color.black;
        }
        else
        {
          currentColor = da.getSequenceAt(i).getColor();
          currentTextColor = Color.black;
        }

        gg.setColor(currentColor);

        gg.fillRect(0,
                    AlignmentUtil.getPixelHeight(starty, i, charHeight),
                    getWidth(),
                    charHeight);

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

  }


  public Dimension getLabelWidth()
  {
    if(getGraphics()==null)
      return null;

   FontMetrics fm = this.getGraphics().getFontMetrics(av.font);
   AlignmentI al = av.getAlignment();

   int i   = 0;
   int idWidth = 0;

   while (i < al.getHeight() && al.getSequenceAt(i) != null)
   {
     SequenceI s   = al.getSequenceAt(i);
     String str   = s.getDisplayId();
     if (fm.stringWidth(str) > idWidth)
       idWidth = fm.stringWidth(str);
     i++;
   }

   return new Dimension(idWidth + 10,getHeight());
 }

 public Dimension getPreferredSize()
 {
   return getLabelWidth();
 }


}