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