package jalview.gui;

import jalview.datamodel.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class ScalePanel extends JPanel
{

  protected ScaleCanvas scaleCanvas;

  protected int offy;
  public    int width;

  protected AlignViewport av;
  AlignmentPanel ap;

  boolean stretchingGroup = false;

  public ScalePanel(AlignViewport av, AlignmentPanel ap)
  {
    this.av         = av;
    this.ap = ap;

    scaleCanvas = new ScaleCanvas(av);
    setLayout(new BorderLayout());
    add(scaleCanvas, BorderLayout.CENTER);
    addMouseListener(new MouseAdapter()
    {
      public void mousePressed(MouseEvent evt)
      {
        doMousePressed(evt);
      }
      public void mouseReleased(MouseEvent evt)
      {
        doMouseReleased(evt);
      }

    });
    addMouseMotionListener(new MouseMotionAdapter()
    {
      public void mouseDragged(MouseEvent evt)
      {
        doMouseDragged(evt);
      }
    });

  }

  public Dimension getMinimumSize() {
    return scaleCanvas.getMinimumSize();
  }

  public Dimension getPreferredSize() {
    return scaleCanvas.getPreferredSize();
  }

  public void doMousePressed(MouseEvent evt) {
    int x = evt.getX();
    int res = x/av.getCharWidth() + av.getStartRes();
    SequenceGroup sg = null;

    if (av.getColumnSelection().contains(res))
      av.getColumnSelection().removeElement(res);
    else
    {
      av.getColumnSelection().addElement(res);

      sg = new SequenceGroup();
      for (int i = 0; i < av.alignment.getSequences().size(); i++)
        sg.addSequence(av.alignment.getSequenceAt(i));

      sg.setStartRes(res);
      sg.setEndRes(res);
    }
    av.setRubberbandGroup(sg);
    ap.RefreshPanels();
  }

  public void doMouseReleased(MouseEvent evt)
  {
    if(!stretchingGroup)
      return;

    int x = evt.getX();
    int res = x/av.getCharWidth() + av.getStartRes();

   if (! av.getColumnSelection().contains(res))
     av.getColumnSelection().addElement(res);

   SequenceGroup sg = av.getRubberbandGroup();

   if(res>sg.getStartRes())
     sg.setEndRes(res);
   else if(res<sg.getStartRes())
     sg.setStartRes(res);

   stretchingGroup = false;
   ap.RefreshPanels();
  }

  public void doMouseDragged(MouseEvent evt)
  {
    int x = evt.getX();
    int res = x/av.getCharWidth() + av.getStartRes();

    SequenceGroup sg = av.getRubberbandGroup();
    if(sg!=null)
    {
      stretchingGroup = true;
      if (res > sg.getStartRes())
        sg.setEndRes(res);
      else if (res < sg.getStartRes())
        sg.setStartRes(res);

      ap.RefreshPanels();
    }

  }
}