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

   1: /* GtkScrollPanePeer.java -- Implements ScrollPanePeer with GTK
   2:    Copyright (C) 1998, 1999, 2005  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.Adjustable;
  42: import java.awt.Dimension;
  43: import java.awt.ScrollPane;
  44: import java.awt.peer.ScrollPanePeer;
  45: 
  46: public class GtkScrollPanePeer extends GtkContainerPeer
  47:   implements ScrollPanePeer
  48: {
  49:   native void create (int width, int height);
  50: 
  51:   void create ()
  52:   {
  53:     create (awtComponent.getWidth (), awtComponent.getHeight ());
  54:   }
  55: 
  56:   // native void gtkScrolledWindowSetScrollPosition(int x, int y);
  57:   native void gtkScrolledWindowSetHScrollIncrement (int u);
  58:   native void gtkScrolledWindowSetVScrollIncrement (int u);
  59: 
  60:   public GtkScrollPanePeer (ScrollPane sp)
  61:   {
  62:     super (sp);
  63: 
  64:     setPolicy (sp.getScrollbarDisplayPolicy ());
  65:   }
  66: 
  67:   native void setPolicy (int policy);
  68:   public void childResized (int width, int height)
  69:   {
  70:     int dim[] = new int[2];
  71: 
  72:     gtkWidgetGetDimensions (dim);
  73: 
  74:     // If the child is in this range, GTK adds both scrollbars, but
  75:     // the AWT doesn't.  So set the peer's scroll policy to
  76:     // GTK_POLICY_NEVER.
  77:     if ((width > dim[0] - getVScrollbarWidth () && width <= dim[0])
  78:         && (height > dim[1] - getHScrollbarHeight () && height <= dim[1]))
  79:       setPolicy (ScrollPane.SCROLLBARS_NEVER);
  80:     else
  81:       setPolicy (((ScrollPane) awtComponent).getScrollbarDisplayPolicy ());
  82:   }
  83: 
  84:   public native int getHScrollbarHeight();
  85:   public native int getVScrollbarWidth();
  86:   public native void setScrollPosition(int x, int y);
  87: 
  88:   public Dimension getPreferredSize ()
  89:   {
  90:     return awtComponent.getSize();
  91:   }
  92: 
  93:   public void setUnitIncrement (Adjustable adj, int u)
  94:   {
  95:     if (adj.getOrientation()==Adjustable.HORIZONTAL)
  96:       gtkScrolledWindowSetHScrollIncrement (u);
  97:     else
  98:       gtkScrolledWindowSetVScrollIncrement (u);
  99:   }
 100: 
 101:   public void setValue (Adjustable adj, int v)
 102:   {
 103: //      System.out.println("SPP: setVal: "+adj+":"+v);
 104: //      Point p=myScrollPane.getScrollPosition ();
 105: //      if (adj.getOrientation()==Adjustable.HORIZONTAL)
 106: //        gtkScrolledWindowSetScrollPosition (v,p.y);
 107: //      else
 108: //        gtkScrolledWindowSetScrollPosition (p.x,v);
 109: //      adj.setValue(v);
 110:   }
 111: }