QtPanelPeer.java

/*
 * @(#)QtPanelPeer.java	1.13 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.qt;

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

/**
 * QtContainerPeer.java
 *
 * @author Nicholas Allen
 */

class QtPanelPeer extends QtContainerPeer implements PanelPeer
{
    private int numChildren = 0;

    QtPanelPeer (QtToolkit toolkit, Container target)
    {
	super (toolkit, target);
    }
    
    protected native void create (QtComponentPeer parentPeer);

    /*
     * Fix for Bug ID 4778521, frame borders not repainting. See
     * the native implementation for a lengthy explanatory comment.
     */
    public native void endValidate ();

    final void add (QtComponentPeer peer) 
    {
	// If the component whose peer is being created is a direct
        // child of this container (i.e., it is not a heavyweight
        // inside a lightweight) then we need to determine the
	// position to insert at.
		
	if (peer.target.getParent() == target) {
	    // Determine the Z order position of the component being added.
			
	    Container container = (Container)target;
	    int numComponents = container.getComponentCount();
			
	    for (int i = 0; i < numComponents; i++) {
		Component component = container.getComponent(i);
		
		if (component == peer.target) {
		    insert (peer, i);
		    numChildren++;
		    return;
		}
	    }
	}
			
	// The peer is not a direct child so it must be in a
	// lightweight hierarchy. We add the peer to the end of the
	// list. 
		
	else {
	    insert (peer, -1);
	}
    }
    
    final void remove (QtComponentPeer peer) {
	if (peer.target.getParent() == target) {
	    numChildren--;
	}
    }

    /** Inserts the component's peer into this container at the
	specified index. If the index is negative then the component
	will be added at the end of the list. */

    private native void insert (QtComponentPeer peer, int index);

    protected boolean canHavePixmapBackground () 
    {
	return false;
    }
 
    protected boolean shouldFocusOnClick() {
        return ((Container)target).getComponentCount() == 0;
    }
 
}