/*
 * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
 * Copyright (C) $$Year-Rel$$ The Jalview Authors
 * 
 * This file is part of Jalview.
 * 
 * Jalview 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 3
 * of the License, or (at your option) any later version.
 *  
 * Jalview 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 Jalview.  If not, see <http://www.gnu.org/licenses/>.
 * The Jalview Authors are detailed in the 'AUTHORS' file.
 */
package jalview.gui;

import jalview.api.AlignViewportI;

import java.awt.Color;
import java.awt.Cursor;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JPanel;

/**
 * DOCUMENT ME!
 * 
 * @author $author$
 * @version $Revision$
 */
@SuppressWarnings("serial")
public class IdwidthAdjuster extends JPanel
{

  int oldX = 0;

  /**
   * Creates a new IdwidthAdjuster object above the id panel that can be dragged
   * to change the panel's width
   * 
   * @param ap
   *          The associated AlignmentPanel
   * 
   */
  public IdwidthAdjuster(AlignmentPanel ap)
  {
    // BH 2019.07.01 no need for overridden paintComponent, especially as it was
    // overriding paint(g) so
    // allowing strange component painting in its place.

    setBackground(Color.white);
    setOpaque(true);

    setCursor(Cursor.getPredefinedCursor(Cursor.W_RESIZE_CURSOR));

    // BH 2019.07.01 MouseAdapter is cleaner - no need for fields active or ap

    MouseAdapter ma = (new MouseAdapter()
    {
      @Override
      public void mousePressed(MouseEvent evt)
      {
        oldX = evt.getX();
      }

      @Override
      public void mouseDragged(MouseEvent evt)
      {
        AlignViewportI viewport = ap.getAlignViewport();
        int curwidth = viewport.getIdWidth();
        int dif = evt.getX() - oldX;
        int newWidth = curwidth + dif;
        if ((newWidth > 20) || (dif > 0))
        {
          viewport.setIdWidth(newWidth);
          ap.paintAlignment(true, false);
        }
        oldX = evt.getX();
      }

      @Override
      public void mouseReleased(MouseEvent evt)
      {

        // If in a SplitFrame with co-scaled alignments, set the other's id
        // width to match

        AlignViewportI viewport = ap.getAlignViewport();
        if (viewport.getCodingComplement() != null
                && viewport.isScaleProteinAsCdna())
        {
          viewport.getCodingComplement().setIdWidth(viewport.getIdWidth());
          SplitFrame sf = (SplitFrame) ap.alignFrame
                  .getSplitViewContainer();
          sf.repaint();
        }

      }

    });
    addMouseListener(ma);
    addMouseMotionListener(ma);
  }
}