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MiGLayout - Java Layout Manager for Swing, SWT and JavaFX
There is a newer version: 3.7.4
package net.miginfocom.layout;
/*
 * License (BSD):
 * ==============
 *
 * Copyright (c) 2004, Mikael Grev, MiG InfoCom AB. (miglayout (at) miginfocom (dot) com)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this list
 * of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice, this
 * list of conditions and the following disclaimer in the documentation and/or other
 * materials provided with the distribution.
 * Neither the name of the MiG InfoCom AB nor the names of its contributors may be
 * used to endorse or promote products derived from this software without specific
 * prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 * @version 1.0
 * @author Mikael Grev, MiG InfoCom AB
 *         Date: 2006-sep-08
 */

/** A class that wraps a container that contains components.
 */
public interface ContainerWrapper extends ComponentWrapper
{
	/** Returns the components of the container that wrapper is wrapping.
	 * @return The components of the container that wrapper is wrapping. Never null.
	 */
	public abstract ComponentWrapper[] getComponents();

	/** Returns the number of components that this parent has.
	 * @return The number of components that this parent has.
	 */
	public abstract int getComponentCount();

	/** Returns the LayoutHandler (in Swing terms) that is handling the layout of this container.
	 * If there exist no such class the method should return the same as {@link #getComponent()}, which is the
	 * container itself.
	 * @return The layout handler instance. Never null.
	 */
	public abstract Object getLayout();

	/** Returns if this container is using left-to-right component ordering.
	 * @return If this container is using left-to-right component ordering.
	 */
	public abstract boolean isLeftToRight();

	/** Paints a cell to indicate where it is.
	 * @param x The x coordinate to start the drwaing.
	 * @param y The x coordinate to start the drwaing.
	 * @param width The width to draw/fill
	 * @param height The height to draw/fill
	 */
	public abstract void paintDebugCell(int x, int y, int width, int height);
}