/*
 * Copyright (c) 2007,2009 Declarative Engineering LLC.
 * All rights reserved.  This program and the accompanying materials
 * are made available under the terms of the Declarative Engineering LLC
 * verson 1 which accompanies this distribution, and is available at
 * http://declarativeengineering.com/legal/DE_Developer_License_v1.txt
 */
package com.foundation.view.swt;

import com.foundation.view.MultiResourceAssociation;
import com.foundation.view.ResourceAssociation;
import com.foundation.view.SingleAssociationContainer;
import com.foundation.view.SingleResourceAssociation;
import com.foundation.view.VariableResourceAssociation;

public class CardLayout extends Layout {
	/** The layout's top index resource. */
	private VariableResourceAssociation topIndex = new VariableResourceAssociation(getContainer(), this, getViewContext(), SingleResourceAssociation.TYPE_INTEGER, false, new Integer(0));
	/** The top and bottom margins. */
	public int marginHeight = 0;
	/** The left and right margins. */
	public int marginWidth = 0;
/**
 * CardLayout constructor.
 * @param container The container that is using the layout.
 */
public CardLayout(IAbstractSwtContainer container) {
	super(container);
}//CardLayout()//
/**
 * CardLayout constructor.
 * @param container The container that is using the layout.
 */
public CardLayout(ICellContainer container) {
	super(container);
}//CardLayout()//
/**
 * Changes the top index for an optional row object.
 * @param rowObject The optional row object.
 * @param index The new top index.
 */
protected void changeTopIndex(Object rowObject, final int index) {
	applyChanges(null, new IChangeHandler() {
		public void applyChanges(org.eclipse.swt.widgets.Composite composite) {
			org.eclipse.swt.widgets.Layout layout = composite.getLayout();
			
			if(layout instanceof com.foundation.view.swt.layout.CardLayout) {
				((com.foundation.view.swt.layout.CardLayout) layout).topIndex = index;
				composite.layout(true, false);
			}//if//
		}//applyChanges()//
	});
}//changeTopIndex()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.Layout#createLayout(java.lang.Object)
 */
public org.eclipse.swt.widgets.Layout createLayout(Object rowObject) {
	com.foundation.view.swt.layout.CardLayout result = new com.foundation.view.swt.layout.CardLayout();
	
	result.marginHeight = marginHeight;
	result.marginWidth = marginWidth;
	
	if(isInitialized()) {
		changeTopIndex(null, topIndex.getValue(rowObject) == null ? 0 : ((Integer) topIndex.getValue(rowObject)).intValue());
	}//if//
	
	return result;
}//createLayout()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.Layout#initialize()
 */
public void initialize() {
	topIndex.initialize();
}//initialize()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.Layout#refresh()
 */
public void refresh() {
	refreshTopIndex();
}//refresh()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.Layout#synchronize()
 */
public void synchronize() {
}//synchronize()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.Layout#release()
 */
public void release() {
	topIndex.release();
}//release()//
/**
 * Refreshes the top index assocation.
 */
protected void refreshTopIndex() {
	if(topIndex.refresh(null)) {
		changeTopIndex(null, topIndex.getValue(null) == null ? 0 : ((Integer) topIndex.getValue(null)).intValue());
		//layoutContainer(null, true, false);
	}//if//
}//refreshTopIndex()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.Layout#onValueChanged(com.foundation.view.ResourceAssociation, boolean)
 */
public void onValueChanged(ResourceAssociation resourceAssociation, int flags) {
	if(topIndex.hasAssociation((SingleResourceAssociation) resourceAssociation)) {
		if(topIndex.refresh(null)) {
			changeTopIndex(null, topIndex.getValue(null) == null ? 0 : ((Integer) topIndex.getValue(null)).intValue());
			//layoutContainer(null, true, false);
		}//if//
	}//if//
	else {
		super.onValueChanged(resourceAssociation, flags);
	}//else//
}//onValueChanged()//
/* (non-Javadoc)
 * @see com.foundation.view.swt.Layout#onValueChanged(com.foundation.view.ResourceAssociation, java.lang.Object, boolean)
 */
public void onValueChanged(ResourceAssociation resourceAssociation, Object alteredItem, Object data, boolean isUpdate) {
	if(topIndex.hasAssociation((MultiResourceAssociation) resourceAssociation)) {
		if(topIndex.refresh(alteredItem)) {
			changeTopIndex(null, topIndex.getValue(alteredItem) == null ? 0 : ((Integer) topIndex.getValue(alteredItem)).intValue());
			//layoutContainer(null, true, false);
		}//if//
	}//if//
	else {
		super.onValueChanged(resourceAssociation, alteredItem, data, isUpdate);
	}//else//
}//onValueChanged()//
/**
 * Sets the layout margin width.
 * @param marginWidth The layout margin width.
 */
public void setMarginWidth(int marginWidth) {
	this.marginWidth = marginWidth;
}//setMarginWidth()//
/**
 * Sets the layout margin height.
 * @param marginHeight The layout margin height.
 */
public void setMarginHeight(int marginHeight) {
	this.marginHeight = marginHeight;
}//setMarginHeight()//
/**
 * Sets an association container used to access the text.
 * @param container The text association metadata.
 */
public void setTopIndexAssociation(SingleAssociationContainer container) {
	this.topIndex.setAssociations(container);
}//setTextAssociation()//
}//CardLayout//