Source for gnu.java.awt.peer.gtk.GtkScrollbarPeer

   1: /* GtkScrollbarPeer.java -- Implements ScrollbarPeer with GTK+
   2:    Copyright (C) 1998, 1999, 2005, 2006  Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package gnu.java.awt.peer.gtk;
  40: 
  41: import java.awt.Scrollbar;
  42: import java.awt.event.AdjustmentEvent;
  43: import java.awt.peer.ScrollbarPeer;
  44: 
  45: public class GtkScrollbarPeer extends GtkComponentPeer
  46:     implements ScrollbarPeer
  47: {
  48:   void create ()
  49:   {
  50:     Scrollbar sb = (Scrollbar) awtComponent;
  51: 
  52:     create (sb.getOrientation (), sb.getValue (),
  53:             sb.getMinimum (), sb.getMaximum (),
  54:             sb.getUnitIncrement (), sb.getBlockIncrement (),
  55:             sb.getVisibleAmount ());
  56:   }
  57: 
  58:   native void create (int orientation, int value,
  59:                       int min, int max, int stepIncr, int pageIncr,
  60:                       int visibleAmount);
  61: 
  62:   native void connectSignals ();
  63: 
  64:   public GtkScrollbarPeer (Scrollbar s)
  65:   {
  66:     super (s);
  67:   }
  68: 
  69:   public native void setLineIncrement(int amount);
  70:   public native void setPageIncrement(int amount);
  71: 
  72:   public void setValues(int value, int visible, int min, int max)
  73:   {
  74:     Scrollbar sb = (Scrollbar) awtComponent;
  75:     if (!sb.getValueIsAdjusting())
  76:       setBarValues(value, visible, min, max);
  77:   }
  78: 
  79:   private native void setBarValues(int value, int visible, int min, int max);
  80: 
  81:   /**
  82:    * Called from the native site when the scrollbar changed.
  83:    * Posts a "user generated" AdjustmentEvent to the queue.
  84:    */
  85:   protected void postAdjustmentEvent (int type, int value)
  86:   {
  87:     Scrollbar bar = (Scrollbar) awtComponent;
  88:     q().postEvent(new AdjustmentEvent(bar,
  89:                                       AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED,
  90:                                       type, value, true));
  91:   }
  92: }