/*
 * Copyright (c) 2005,2009 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.tcv.swt.server;

import com.foundation.controller.RemoteViewController;
import com.foundation.tcv.swt.IPanelViewer;
import com.foundation.view.ResourceAssociation;
import com.foundation.view.SingleAssociationContainer;
import com.foundation.view.SingleResourceAssociation;

public class PanelViewer extends Container implements IPanelViewer {
	/** The association that provides a view controller whose view will be displayed in this panel. */
	private SingleResourceAssociation controllerAssociation = new SingleResourceAssociation(this, this, getViewContext(), ResourceAssociation.TYPE_OBJECT, false, null);
	/** The view controller whose view is currently displayed. */
	private RemoteViewController viewController = null;
	/** Whether the panel viewer should allow the focus to change when the viewed contents change. */
	private boolean changeFocus = true;
/**
 * PanelViewer constructor.
 * @param parent A composite control which will be the parent of the new instance (cannot be null).
 * @param name The unique component name.
 * @param style The style of control to construct.
 * @see #STYLE_ARROW
 * @see #STYLE_CHECK
 * @see #STYLE_PUSH
 * @see #STYLE_RADIO
 * @see #STYLE_TOGGLE
 * @see #STYLE_FLAT
 * @see #STYLE_LEFT
 * @see #STYLE_RIGHT
 * @see #STYLE_CENTER
 * @see #STYLE_UP
 * @see #STYLE_DOWN
 */
public PanelViewer(Container parent, String name, int style) {
	super(parent, name, style);
	
	sendMessage(MESSAGE_INITIALIZE, null, null, parent.getNumber(), style);
}//PanelViewer()//
/**
 * Sets the association container used to access the controller.
 * @param container The controller association metadata.
 */
public void setControllerAssociation(SingleAssociationContainer container) {
	controllerAssociation.setAssociations(container);
}//setControllerAssociation()//
/**
 * Sets whether the focus should be allowed to change to the viewer's component when the contents of the viewer changes.
 * @param changeFocus Whether focus changes should be allowed when changing the viewer contents.
 */
public void setChangeFocus(boolean changeFocus) {
	if(this.changeFocus != changeFocus) {
		this.changeFocus = changeFocus;
		sendMessage(MESSAGE_SET_CHANGE_FOCUS, changeFocus ? Boolean.TRUE : Boolean.FALSE);
	}//if//
}//setChangeFocus()//
/* (non-Javadoc)
 * @see com.foundation.tcv.swt.server.Container#internalViewInitialize()
 */
protected void internalViewInitialize() {
	super.internalViewInitialize();
	
	controllerAssociation.initialize();
}//internalViewInitialize()//
/* (non-Javadoc)
 * @see com.foundation.tcv.swt.server.Container#internalViewRefresh()
 */
protected void internalViewRefresh() {
	super.internalViewRefresh();
	
	internalViewRefreshController();
}//internalViewRefresh()//
/* (non-Javadoc)
 * @see com.foundation.tcv.swt.server.Container#internalViewRelease()
 */
protected void internalViewRelease() {
	super.internalViewRelease();
	
	controllerAssociation.release();
}//internalViewRelease()//
/**
 * Refreshes the controller association.
 */
protected void internalViewRefreshController() {
	if(controllerAssociation.refresh()) {
		Object value = controllerAssociation.getValue();

		addMessageHold();
		
		try {
			sendMessage(MESSAGE_BEGIN_CHANGE_CONTENTS, null);
			
			//Close the previous view.//
			if(viewController != null) {
				viewController.close();
				viewController = null;
			}//if//
	
			//Open the new view.//
			if(value instanceof RemoteViewController) {
				viewController = (RemoteViewController) value;
				viewController.openPartial(this, getViewContext());
			}//if//
			
			sendMessage(MESSAGE_END_CHANGE_CONTENTS, null);
		}//try//
		finally {
			removeMessageHold();
		}//finally//
	}//if//
}//internalViewRefreshController()//
/* (non-Javadoc)
 * @see com.foundation.tcv.swt.server.AbstractComponent#internalOnValueChanged(com.foundation.view.SingleResourceAssociation)
 */
protected void internalOnValueChanged(SingleResourceAssociation resourceAssociation, int flags) {
	if(resourceAssociation == controllerAssociation) {
		internalViewRefreshController();
	}//if//
	else {
		super.internalOnValueChanged(resourceAssociation, flags);
	}//else//
}//internalOnValueChanged()//
/* (non-Javadoc)
 * @see com.foundation.tcv.swt.server.AbstractComponent#getClientClassName()
 */
protected String getClientClassName() {
	return "com.foundation.tcv.swt.client.PanelViewer";
}//getClientClassName()//
}//PanelViewer//