GCheckboxPeer.java

/*
 * @(#)GCheckboxPeer.java	1.15 06/10/10
 *
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation. 
 * 
 * This program 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 version 2 for more details (a copy is
 * included at /legal/license.txt). 
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA 
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions. 
 *
 */

package sun.awt.gtk;

import java.awt.*;
import java.awt.event.*;
import sun.awt.peer.*;

/**
 *
 *
 * @author Nicholas Allen
 */

class GCheckboxPeer extends GComponentPeer implements CheckboxPeer {
    private static native void initIDs();
    static {
        initIDs();
    }
    /** Creates a new GCheckboxPeer. */

    GCheckboxPeer (GToolkit toolkit, Checkbox target) {
        super(toolkit, target);
        setState(target.getState());
        setLabel(target.getLabel());
    }
	
    protected void create() {
        CheckboxGroup group = ((Checkbox) target).getCheckboxGroup();
        create(group != null);
    }
	
    private native void create(boolean radio);
	
    public boolean isFocusTraversable() {
        return true;
    }
	
    public native void setState(boolean state);
	
    /* TODO: Changing of checkbox group after widget created. */
	
    public void setCheckboxGroup(CheckboxGroup g) {}
	
    public void setLabel(String label) {
        setLabelNative(stringToNulMultiByte(label));
    }

    private native void setLabelNative(byte[] label);
	
    private void postItemEvent(boolean state) {
        Checkbox cb = (Checkbox) target;
        CheckboxGroup cbg = cb.getCheckboxGroup();
        /* Bugid 4039594. If this is the current Checkbox in a CheckboxGroup,
         * then return to prevent deselection. Otherwise, it's logical state
         * will be turned off, but it will appear on.
         */
        if ((cbg != null) && (cbg.getSelectedCheckbox() == cb) &&
            cb.getState()) {
            cb.setState(true);
            return;
        }
        cb.setState(state);
        // For some reason Java 2 only sends selected events is the checkbox is in a chekbox group.
        // I don't know why this is but implemented this anyway to be consistent.
		
        if (cbg == null || state)
            GToolkit.postEvent(new ItemEvent(cb, ItemEvent.ITEM_STATE_CHANGED,
                    cb.getLabel(),
                    state ? ItemEvent.SELECTED : ItemEvent.DESELECTED));
    }
}