87 lines
3 KiB
Java
87 lines
3 KiB
Java
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/* GtkCheckboxGroupPeer.java - Wrap a CheckboxGroup
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Copyright (C) 2002 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.CheckboxGroup;
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import java.util.WeakHashMap;
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// Note that there is no peer interface for a CheckboxGroup. We
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// introduce our own in order to make it easier to keep a piece of
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// native state for each one.
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public class GtkCheckboxGroupPeer extends GtkGenericPeer
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{
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// This maps from a CheckboxGroup to the native peer.
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private static WeakHashMap map = new WeakHashMap ();
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// Find the native peer corresponding to a CheckboxGroup.
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public static synchronized GtkCheckboxGroupPeer
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getCheckboxGroupPeer (CheckboxGroup group)
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{
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if (group == null)
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return null;
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GtkCheckboxGroupPeer nat = (GtkCheckboxGroupPeer) map.get (group);
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if (nat == null)
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{
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nat = new GtkCheckboxGroupPeer ();
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map.put (group, nat);
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}
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return nat;
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}
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private GtkCheckboxGroupPeer ()
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{
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// We don't need any special state here. Note that we can't store
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// a reference to the java-side CheckboxGroup. That would mean
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// they could never be collected.
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super (null);
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}
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// Dispose of our native resources.
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public native void dispose ();
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// Remove a given checkbox from this group.
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public native void remove (GtkCheckboxPeer box);
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// When collected, clean up the native state.
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protected void finalize ()
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{
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dispose ();
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}
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}
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