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


public class FeatureSettings extends Panel implements ItemListener,
    MouseListener, MouseMotionListener
{
  final FeatureRenderer fr;
  final AlignmentPanel ap;
  final AlignViewport av;
  final Frame frame;
  Panel groupPanel;
  Panel featurePanel = new Panel();

  public FeatureSettings(AlignViewport av, final AlignmentPanel ap)
  {
    this.ap = ap;
    this.av = av;
    fr = ap.seqPanel.seqCanvas.getFeatureRenderer();

    setTableData();

    this.setLayout(new BorderLayout());
    ScrollPane sp = new ScrollPane();
    sp.add(featurePanel);
    add(sp, BorderLayout.CENTER);
    if(groupPanel!=null)
    {
      sp = new ScrollPane();
      sp.add(groupPanel);

      add(sp, BorderLayout.NORTH);
      sp.validate();
      sp.setSize( 100, 55);
    }
    frame = new Frame();
    frame.add(this);
    int height = featurePanel.getComponentCount()*50 ;
    if (height>400)
      height = 400;

    jalview.bin.JalviewLite.addFrame(frame, "Feature Settings", 200,
                                     height);
  }

  void setTableData()
  {
    if(fr.featureGroups==null)
      fr.featureGroups = new Hashtable();
    else
      fr.featureGroups.clear();

    Vector allFeatures = new Vector();
    Enumeration tmpfeatures;
    SequenceFeature sf;

    for (int i = 0; i < av.alignment.getHeight(); i++)
    {
      if (av.alignment.getSequenceAt(i).getSequenceFeatures() == null)
        continue;

      tmpfeatures = av.alignment.getSequenceAt(i).getSequenceFeatures().elements();
      while (tmpfeatures.hasMoreElements())
      {
        sf = (SequenceFeature) tmpfeatures.nextElement();
        if (!allFeatures.contains(sf.getType()))
        {
          allFeatures.addElement(sf.getType());
          Color col = fr.getColour(sf.getType());
          boolean displayed = true;
          if (fr.featuresDisplayed != null)
            displayed = fr.featuresDisplayed.contains(sf.getType());

          Checkbox check = new Checkbox(sf.getType(), displayed);
          check.addMouseListener(this);
          check.addMouseMotionListener(this);
          check.setBackground(col);
          check.addItemListener(this);
          featurePanel.add(check);
        }
        if(sf.getFeatureGroup()!=null
           && !fr.featureGroups.containsKey(sf.getFeatureGroup()))
        {
          fr.featureGroups.put(sf.getFeatureGroup(), new Boolean(true));
          if(groupPanel==null)
            groupPanel = new Panel();

          Checkbox check = new Checkbox(sf.getFeatureGroup(), true);
          check.setFont(new Font("Serif", Font.BOLD, 12));
          check.addItemListener(this);
          groupPanel.add(check);
        }
      }
    }

    featurePanel.setLayout(new GridLayout(allFeatures.size(), 2, 10,5));
    featurePanel.validate();
  }

  public void itemStateChanged(ItemEvent evt)
  {
    if(evt!=null)
    {
      //Is the source a top level featureGroup?
      Checkbox source = (Checkbox) evt.getSource();
      if (fr.featureGroups.containsKey(source.getLabel()))
      {
        fr.featureGroups.put(source.getLabel(), new Boolean(source.getState()));
        ap.seqPanel.seqCanvas.repaint();
        if (ap.overviewPanel != null)
          ap.overviewPanel.updateOverviewImage();

        return;
      }
    }

      Component[] comps = featurePanel.getComponents();
      int cSize = comps.length;

      Object[][] data = new Object[cSize][3];

      for (int i = 0; i < cSize; i++)
      {
        Checkbox check = (Checkbox) comps[i];
        data[i][0] = check.getLabel();
        data[i][1] = fr.getColour(check.getLabel());
        data[i][2] = new Boolean(check.getState());
      }

      fr.setFeaturePriority(data);
      ap.seqPanel.seqCanvas.repaint();
      if (ap.overviewPanel != null)
        ap.overviewPanel.updateOverviewImage();
  }

  Checkbox selectedCheck;
  boolean dragging = false;

  public void mousePressed(MouseEvent evt)
  {
    selectedCheck = (Checkbox)evt.getSource();
  }

  public void mouseDragged(MouseEvent evt)
  {
      dragging = true;
  }

  public void mouseReleased(MouseEvent evt)
  {
    Component comp = null;
    Checkbox  target = null;

    int height = evt.getY()+evt.getComponent().getLocation().y;


    if(height > this.getSize().height)
     {
       comp = featurePanel.getComponent(featurePanel.getComponentCount()-1);
     }
     else if(height < 0)
     {
       comp = featurePanel.getComponent(0);
     }
     else
     {
       comp = featurePanel.getComponentAt(evt.getX(),
                                  evt.getY() +
                                  evt.getComponent().getLocation().y);
     }

    if(comp!=null && comp instanceof Checkbox)
      target = (Checkbox)comp;

    if (selectedCheck != null && target != null && selectedCheck != target)
    {
      int targetIndex = -1;
      for(int i=0; i<featurePanel.getComponentCount(); i++)
      {
          if(target==featurePanel.getComponent(i))
          { targetIndex = i; break; }
      }


      featurePanel.remove(selectedCheck);
      featurePanel.add(selectedCheck, targetIndex);
      featurePanel.validate();
      itemStateChanged(null);
    }
  }


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