/*******************************************************************************
 * Copyright 2015 xWic group (http://www.xwic.de)
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * 		http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and 
 * limitations under the License.
 *  
 *******************************************************************************/
package de.jwic.controls;

import java.util.Stack;

import de.jwic.base.Control;
import de.jwic.base.ControlContainer;
import de.jwic.base.IControlContainer;
import de.jwic.base.JWicException;

/**
 * A ControlContainer that displays only one control at a time.
 * 
 * @author Florian Lippisch
 * @version $Revision: 1.7 $
 */
public class StackedContainer extends ControlContainer {

	private static final long serialVersionUID = 2177569108464586902L;
	private String currentControlName = null;
	private Stack<String> stack = new Stack<String>();
	private int width = 0;
	private int height = 0;

	/**
	 * @param container
	 * @param name
	 */
	public StackedContainer(IControlContainer container, String name) {
		super(container, name);
	}

	/**
	 * @param container
	 */
	public StackedContainer(IControlContainer container) {
		super(container);
	}
	
	/* (non-Javadoc)
	 * @see de.jwic.base.ControlContainer#registerControl(de.jwic.base.Control, java.lang.String)
	 */
	public void registerControl(Control control, String name) throws JWicException {
		super.registerControl(control, name);
		stack.push(control.getName());
		if (currentControlName == null) {
			currentControlName = control.getName();
			requireRedraw();
		}
	}

	/* (non-Javadoc)
	 * @see de.jwic.base.ControlContainer#unregisterControl(de.jwic.base.Control)
	 */
	public void unregisterControl(Control control) {
		stack.remove(control.getName());
		if (currentControlName.equals(control.getName())) {
			if (!stack.isEmpty()) {
				currentControlName = stack.peek();
			} else {
				currentControlName = null;
			}
		}
		super.unregisterControl(control);
	}
	
	/**
	 * @return Returns the currentControlName.
	 */
	public String getCurrentControlName() {
		return currentControlName;
	}

	/**
	 * @param currentControlName The currentControlName to set.
	 */
	public void setCurrentControlName(String currentControlName) {
		this.currentControlName = currentControlName;
		requireRedraw();
	}

	/* (non-Javadoc)
	 * @see de.jwic.base.ControlContainer#isRenderingRelevant(de.jwic.base.Control)
	 */
	public boolean isRenderingRelevant(Control childControl) {
		return childControl.getName().equals(currentControlName);
	}

	/**
	 * @return the width
	 */
	public int getWidth() {
		return width;
	}

	/**
	 * @param width the width to set
	 */
	public void setWidth(int width) {
		if (this.width != width) {
			this.width = width;
			requireRedraw();
		}
	}

	/**
	 * @return the height
	 */
	public int getHeight() {
		return height;
	}

	/**
	 * @param height the height to set
	 */
	public void setHeight(int height) {
		if (this.height != height) {
			this.height = height;
			requireRedraw();
		}
	}

}