package jalview.appletgui;

import java.awt.event.*;
import java.awt.*;


public class IdwidthAdjuster extends Panel implements MouseListener, MouseMotionListener
{
  boolean active = false;
  int oldX=0;
  Image image;
  AlignmentPanel ap ;

  public IdwidthAdjuster(AlignmentPanel ap)
  {
    setLayout(null);
    this.ap = ap;
    java.net.URL url = getClass().getResource("/images/idwidth.gif");
       if (url != null)
         image = java.awt.Toolkit.getDefaultToolkit().getImage(url);

    addMouseListener(this);
    addMouseMotionListener(this);
  }

  public void mousePressed(MouseEvent evt)
  { oldX = evt.getX(); }

  public void mouseReleased(MouseEvent evt){ active = false; repaint(); }
  public void mouseEntered(MouseEvent evt) { active = true;  repaint();}
  public void mouseExited(MouseEvent evt)  { active = false; repaint();}
  public void mouseDragged(MouseEvent evt)
  {
    active = true;
    Dimension d = ap.idPanel.idCanvas.getSize();
    int dif = evt.getX() - oldX;

    if(d.width+dif>20 || dif>0)
    {
      ap.setIdWidth(d.width + dif,d.height);
      this.setSize(d.width + dif, getSize().height);
    }

    oldX = evt.getX();
  }

  public void mouseMoved(MouseEvent evt)   {}
  public void mouseClicked(MouseEvent evt) {}

  public void paint(Graphics g)
  {
    g.setColor(Color.white);
    g.fillRect(0,0, getSize().width, getSize().height);
    if(active)
    {
      if(image!=null)
        g.drawImage(image, getSize().width-20, 2, this);
    }
  }

}