package jalview.appletgui;

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

public class AnnotationLabels extends Panel implements ActionListener
{
  boolean active = false;
  AlignmentPanel ap ;
  boolean resizing = false;
  int oldY, mouseX;
  static String ADDNEW = "Add new row";
  static String HIDE = "Hide this row";
  static String DELETE = "Delete this row";
  static String SHOWALL="Show all hidden rows";
  int selectedRow = 0;
  int scrollOffset = 0;

  public AnnotationLabels(AlignmentPanel ap)
  {
    this.ap = ap;
    setLayout(null);
    addMouseListener(new MouseAdapter()
    {public void mousePressed(MouseEvent evt)
      {
        doMousePressed(evt);
      }
    });
  }

  public void setScrollOffset(int y)
  {
    scrollOffset = y;
    repaint();
  }

  public void actionPerformed(ActionEvent evt)
  {
    AlignmentAnnotation[] aa = ap.av.alignment.getAlignmentAnnotation();

   if(evt.getActionCommand().equals(HIDE))
   {
     aa[selectedRow].visible = false;
   }
   else if(evt.getActionCommand().equals(SHOWALL))
   {
       for(int i=0; i<aa.length; i++)
         aa[i].visible = true;
   }
   ap.annotationPanel.adjustPanelHeight();
   setSize(getSize().width,ap.annotationPanel.getSize().height);
   ap.validate();
   ap.repaint();
  }

  public void doMousePressed(MouseEvent evt)
  {
    int y = evt.getY() - scrollOffset;
    AlignmentAnnotation[] aa = ap.av.alignment.getAlignmentAnnotation();
    int height = 0;
    for (int i = 0; i < aa.length; i++)
    {
      if (!aa[i].visible)
        continue;

      height += aa[i].height;
      if (y < height)
      {
        selectedRow = i;
        break;
      }
    }

    PopupMenu pop = new PopupMenu("Annotations");
    MenuItem item = new MenuItem(HIDE);
    item.addActionListener(this);
    pop.add(item);
    item = new MenuItem(SHOWALL);
    item.addActionListener(this);
    pop.add(item);
    this.add(pop);
    pop.show(this, evt.getX(), evt.getY());

  }

  public void paint(Graphics g)
  {
    drawComponent(g);
  }

  public void drawComponent(Graphics g)
  {
    FontMetrics fm = g.getFontMetrics(g.getFont());
    g.setColor(Color.white);
    g.fillRect(0,0, getSize().width, getSize().height);

    g.translate(0, scrollOffset);
    g.setColor(Color.black);

   AlignmentAnnotation[] aa = ap.av.alignment.getAlignmentAnnotation();
   int y = g.getFont().getSize();
   int x = 0;

   if(aa!=null)
   for(int i=0; i<aa.length; i++)
   {
     if(!aa[i].visible)
       continue;

     x = getSize().width - fm.stringWidth(aa[i].label)-3;

     if(aa[i].isGraph)
       y+=(aa[i].height/3);

     g.drawString(aa[i].label, x, y);

     if(aa[i].isGraph)
       y+=(2*aa[i].height/3);
    else
       y+=aa[i].height;
   }
  }

}