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

   1: /* GtkChoicePeer.java -- Implements ChoicePeer 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.Choice;
  42: import java.awt.event.ItemEvent;
  43: import java.awt.peer.ChoicePeer;
  44: 
  45: public class GtkChoicePeer extends GtkComponentPeer
  46:   implements ChoicePeer
  47: {
  48:   public GtkChoicePeer (Choice c)
  49:   {
  50:     super (c);
  51: 
  52:     int count = c.getItemCount ();
  53:     if (count > 0)
  54:       {
  55:     String items[] = new String[count];
  56:     for (int i = 0; i < count; i++)
  57:       items[i] = c.getItem (i);
  58:       
  59:     append (items);
  60:       }
  61: 
  62:     int selected = c.getSelectedIndex();
  63:     if (selected >= 0)
  64:       select(selected);
  65:   }
  66: 
  67:   native void create ();
  68: 
  69:   native void append (String items[]);
  70:   native int nativeGetSelected ();
  71:   native void nativeAdd (String item, int index);
  72:   native void nativeRemove (int index);
  73:   native void nativeRemoveAll ();
  74: 
  75:   native void connectSignals ();
  76: 
  77:   native void selectNative (int position);
  78:   native void selectNativeUnlocked (int position);
  79: 
  80:   public void select (int position)
  81:   {
  82:     if (Thread.currentThread() == GtkToolkit.mainThread)
  83:       selectNativeUnlocked (position);
  84:     else
  85:       selectNative (position);
  86:   }
  87: 
  88:   public void add (String item, int index)
  89:   {
  90:     int before = nativeGetSelected();
  91:     
  92:     nativeAdd (item, index);
  93:     
  94:     /* Generate an ItemEvent if we added the first one or
  95:        if we inserted at or before the currently selected item. */
  96:     if ((before < 0) || (before >= index))
  97:       {
  98:         // Must set our state before notifying listeners
  99:     ((Choice) awtComponent).select (((Choice) awtComponent).getItem (0));
 100:         postItemEvent (((Choice) awtComponent).getItem (0), ItemEvent.SELECTED);
 101:       }
 102:   }
 103: 
 104:   public void remove (int index)
 105:   {
 106:     int before = nativeGetSelected();
 107:     int after;
 108:     
 109:     nativeRemove (index);
 110:     after = nativeGetSelected();
 111:     
 112:     /* Generate an ItemEvent if we are removing the currently selected item
 113:        and there are at least one item left. */
 114:     if ((before == index) && (after >= 0))
 115:       {
 116:         // Must set our state before notifying listeners
 117:     ((Choice) awtComponent).select (((Choice) awtComponent).getItem (0));
 118:         postItemEvent (((Choice) awtComponent).getItem (0), ItemEvent.SELECTED);
 119:       }
 120:   }
 121: 
 122:   public void removeAll ()
 123:   {
 124:     nativeRemoveAll();
 125:   }
 126:   
 127:   public void addItem (String item, int position)
 128:   {
 129:     add (item, position);
 130:   }
 131: 
 132:   protected void postChoiceItemEvent (String label, int stateChange)
 133:   {
 134:     postItemEvent (label, stateChange);
 135:   }
 136: }