| /* GtkChoicePeer.java -- Implements ChoicePeer with GTK |
| Copyright (C) 1998, 1999, 2005 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath 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 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.java.awt.peer.gtk; |
| |
| import java.awt.Choice; |
| import java.awt.AWTEvent; |
| import java.awt.event.ItemEvent; |
| import java.awt.peer.ChoicePeer; |
| |
| public class GtkChoicePeer extends GtkComponentPeer |
| implements ChoicePeer |
| { |
| private int selected; |
| |
| public GtkChoicePeer (Choice c) |
| { |
| super (c); |
| |
| int count = c.getItemCount (); |
| if (count > 0) |
| { |
| for (int i = 0; i < count; i++) |
| add( c.getItem(i), i ); |
| |
| selected = c.getSelectedIndex(); |
| if( selected >= 0 ) |
| select( selected ); |
| } |
| else |
| selected = -1; |
| } |
| |
| native void create (); |
| |
| native int nativeGetSelected (); |
| |
| native void connectSignals (); |
| |
| native void selectNative (int position); |
| |
| native void selectNativeUnlocked (int position); |
| |
| public native void add (String item, int index); |
| |
| native void nativeRemove(int index); |
| |
| native void nativeRemoveAll(); |
| |
| public void select (int position) |
| { |
| if (Thread.currentThread() == GtkToolkit.mainThread) |
| selectNativeUnlocked (position); |
| else |
| selectNative (position); |
| } |
| |
| public void remove( int index ) |
| { |
| // Ensure the triggering of an event when removing item zero if zero is the |
| // selected item, even though the selected index doesn't change. |
| if( index == 0 && selected == 0 ) |
| selected = -1; |
| nativeRemove( index ); |
| } |
| |
| public void removeAll() |
| { |
| selected = -1; // we do not want to trigger a select event here. |
| nativeRemoveAll(); |
| } |
| |
| public void addItem (String item, int position) |
| { |
| add (item, position); |
| } |
| |
| /** |
| * Callback from the native side on an item-select event, |
| * which posts an event. The event is only posted if it represents an actual |
| * change. Selected is set to the peer's state initially, so that the |
| * first call to select(int) from the constructor will not trigger an event. |
| * (it should not) |
| */ |
| protected void postChoiceItemEvent ( int index ) |
| { |
| if( selected != index ) |
| { |
| selected = index; |
| postItemEvent (((Choice) awtComponent).getItem( selected ), |
| ItemEvent.SELECTED); |
| } |
| } |
| |
| /** |
| * Catches the event and calls Choice.select() if the component state |
| * needs updating. |
| */ |
| public void handleEvent (AWTEvent event) |
| { |
| super.handleEvent( event ); |
| if( event instanceof ItemEvent ) |
| if( ((ItemEvent)event).getItemSelectable() == awtComponent && |
| ((ItemEvent)event).getStateChange() == ItemEvent.SELECTED ) |
| ((Choice)awtComponent).select( selected ); |
| } |
| } |
| |