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+/* 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() == GtkMainThread.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 );
+ }
+}