scrollpanel.java

emboss的linux版本的源代码

/********************************************************************
*
*  This library is free software; you can redistribute it and/or
*  modify it under the terms of the GNU Library General Public
*  License as published by the Free Software Foundation; either
*  version 2 of the License, or (at your option) any later version.
*
*  This library 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
*  Library General Public License for more details.
*
*  You should have received a copy of the GNU Library General Public
*  License along with this library; if not, write to the
*  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
*  Boston, MA  02111-1307, USA.
*
*  @author: Copyright (C) Tim Carver
*
********************************************************************/


package org.emboss.jemboss.gui;
import javax.swing.*;
import java.awt.LayoutManager;
import java.awt.Rectangle;
import java.awt.Dimension;
import java.awt.Color;

/**
*
* Extends JPanel to implement Scrollable to speed scroll pane
* scrolling
*
*/
public class ScrollPanel extends JPanel implements Scrollable
{
  
  public ScrollPanel()
  {
    super();
  }

  public ScrollPanel(LayoutManager l)
  {
    super(l);
  }

  public Dimension getPreferredScrollableViewportSize()
  {
    return getPreferredSize();
  }

  public boolean getScrollableTracksViewportHeight()
  {
    return false;
  }

  public boolean getScrollableTracksViewportWidth()
  {
    return false;
  }

  public int getScrollableBlockIncrement(Rectangle r,
                    int orientation, int direction)
  {
    return 60;
  }

  public int getScrollableUnitIncrement(Rectangle r,
                    int orientation, int direction)
  {
    return 10;
  }


}