Initial commit from SVN.
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wcrisman
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/*
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* Copyright (c) 2003,2009 Declarative Engineering LLC.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Declarative Engineering LLC
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* verson 1 which accompanies this distribution, and is available at
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* http://declarativeengineering.com/legal/DE_Developer_License_v1.txt
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*/
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package com.foundation.tcv.swt.server;
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import com.common.util.*;
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import com.common.debug.*;
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import com.foundation.util.*;
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import com.foundation.view.*;
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import com.foundation.controller.*;
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import com.foundation.event.*;
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import com.foundation.tcv.swt.*;
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import com.foundation.tcv.view.*;
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public class Panel extends Container implements IPanel {
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/** The attribute that provides the collection of internal view controllers. */
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private IAttributeAssociation internalViewsAttribute = null;
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/** A support for receiving collection change events. */
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private EventSupport eventSupport = new EventSupport(null);
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/** The collection of internal view controllers. */
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private ICollection internalViewControllers = null;
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/** The collection of internal view controllers currently open. Maintaining this collection is necessary in the event that all view controllers are removed from the collection. */
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private LiteList openViewControllers = null;
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/** The next location. This was used for allowing floating frames, but that is currently disabled. */
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//private int nextLocation = 0;
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/** The location increment. This was used for allowing floating frames, but that is currently disabled. */
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//private int locationIncrement = 20;
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/**
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* Panel default constructor.
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* <p>Warning: This is only for use by the framework. This should never be called to create a useable instance.</p>
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*/
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public Panel() {
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}//Panel()//
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/**
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* Panel constructor.
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* @param parent A composite control which will be the parent of the new instance (cannot be null).
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* @param name The unique component name.
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* @param style The style of control to construct.
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* @see #STYLE_NO_BACKGROUND
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* @see #STYLE_NO_FOCUS
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* @see #STYLE_NO_MERGE_PAINTS
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* @see #STYLE_NO_REDRAW_RESIZE
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* @see #STYLE_NO_RADIO_GROUP
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* @see #STYLE_EMBEDDED
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* @see #STYLE_DOUBLE_BUFFERED
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* @see #STYLE_H_SCROLL
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* @see #STYLE_V_SCROLL
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* @see #STYLE_BORDER
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* @see #STYLE_LEFT_TO_RIGHT
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* @see #STYLE_RIGHT_TO_LEFT
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*/
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public Panel(Container parent, String name, int style) {
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super(parent, name, style);
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sendMessage(MESSAGE_INITIALIZE, null, null, parent.getNumber(), style);
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}//Panel()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.Component#internalOnValueChanged(com.foundation.view.swt.IAttributeAssociation)
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*/
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protected void internalOnValueChanged(IAttributeAssociation attributeAssociation) {
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if(attributeAssociation == internalViewsAttribute) {
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internalViewRefresh();
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}//if//
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else {
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super.internalOnValueChanged(attributeAssociation);
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}//else//
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}//internalOnValueChanged()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.view.IViewComponent#processMessage(com.foundation.tcv.model.ViewMessage)
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*/
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public Object processMessage(ViewMessage viewMessage) {
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Object retVal = null;
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switch(viewMessage.getMessageNumber()) {
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default: {
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retVal = super.processMessage(viewMessage);
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}//default//
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}//switch//
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return retVal;
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}//processMessage()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.server.AbstractComponent#getClientClassName()
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*/
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protected String getClientClassName() {
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return "com.foundation.tcv.swt.client.Panel";
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}//getClientClassName()//
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/**
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* Sets the internal view controller collection.
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* @param internalViewsAttribute The attribute containing the collection of view controllers representing views that exist within this panel.
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*/
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public void setInternalViewsAttribute(IAttributeAssociation internalViewsAttribute) {
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this.internalViewsAttribute = internalViewsAttribute;
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}//setInternalViewsAttribute()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.server.AbstractComponent#internalEvaluate(com.foundation.event.IEventEmitter, int, java.lang.Object[])
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*/
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protected void internalEvaluate(IEventEmitter eventEmitter, int eventNumber, Object[] arguments) {
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//Add, remove, or replace items from the list.//
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if(eventEmitter == internalViewControllers) {
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if(eventNumber == IManagedCollection.EVENT.getNumber()) {
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CollectionChangeEvent event = (CollectionChangeEvent) arguments[0];
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if(event.hasAdds()) {
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if(event.getAddedObjects() != null) {
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IIterator iterator = event.getAddedObjects().iterator();
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while(iterator.hasNext()) {
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Object next = iterator.next();
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openView((ViewController) next);
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}//while//
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}//if//
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else {
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openView((ViewController) event.getAddedObject());
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}//else//
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}//if//
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if(event.hasRemoves()) {
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if(event.getRemovedObjects() != null) {
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IIterator iterator = event.getRemovedObjects().iterator();
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while(iterator.hasNext()) {
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Object next = iterator.next();
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openViewControllers.remove(next);
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closeView((ViewController) next);
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}//while//
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}//if//
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else {
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openViewControllers.remove(event.getRemovedObject());
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closeView((ViewController) event.getRemovedObject());
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}//else//
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//if((arguments != null) && (arguments.length > 0) && (arguments[0] != null)) {
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//}//if//
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//else {
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//Could optimize if removing all values, but there is no way to know if all values are being removed.//
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// closeAllViews();
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//}//else//
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}//if//
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}//if//
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}//if//
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}//internalEvaluate()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.server.AbstractComponent#internalViewInitialize()
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*/
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protected void internalViewInitialize() {
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super.internalViewInitialize();
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if(internalViewsAttribute != null) {
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openViewControllers = new LiteList(10, 50);
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internalViewsAttribute.register();
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}//if//
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}//internalViewInitialize()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.server.AbstractComponent#internalViewRelease()
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*/
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protected void internalViewRelease() {
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super.internalViewRelease();
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if(internalViewsAttribute != null) {
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internalViewsAttribute.unregister();
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eventSupport.unregisterAll();
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closeAllViews();
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}//if//
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}//internalViewRelease()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.server.AbstractComponent#internalViewRefresh()
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*/
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protected void internalViewRefresh() {
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super.internalViewRefresh();
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if(internalViewsAttribute != null) {
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ICollection internalViewControllers = (ICollection) internalViewsAttribute.getAttributeValue();
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ICollection copy = null;
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if(this.internalViewControllers != internalViewControllers) {
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//Unregister the old event hooks.//
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if(this.internalViewControllers instanceof IEventEmitter) {
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eventSupport.unregisterAll((IEventEmitter) this.internalViewControllers);
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}//if//
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closeAllViews();
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//Save a reference to the current collection in the model.//
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this.internalViewControllers = internalViewControllers;
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//Register the new event hooks.//
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synchronized(internalViewControllers) {
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if(internalViewControllers instanceof IManagedCollection) {
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eventSupport.register(((IManagedCollection) internalViewControllers), IManagedCollection.EVENT.getNumber(), this, true);
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}//if//
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copy = new LiteList(internalViewControllers);
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}//synchronized//
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}//if//
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if(copy != null) {
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IIterator iterator = copy.iterator();
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while(iterator.hasNext()) {
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Object next = iterator.next();
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if(next instanceof ViewController) {
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openView((ViewController) next);
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}//if//
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else {
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Debug.log("Error: Only view controllers may populate the collection of internal frames attached to the panel.");
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}//else//
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}//while//
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}//if//
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}//if//
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}//internalViewRefresh()//
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/**
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* Opens the view for the associated view controller.
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* @param viewController The view controller that will provide the view.
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*/
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private void openView(ViewController viewController) {
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IView view = null;
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addMessageHold();
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openViewControllers.add(viewController);
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view = viewController.openPartial(this, null);
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if(view instanceof Frame) {
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/*
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int location = nextLocation;
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if(location + ((Frame) view).getSwtControl().getSize().x > getSwtControl().getSize().x) {
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location = 0;
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}//if//
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else if(location + ((Frame) view).getSwtControl().getSize().y > getSwtControl().getSize().y) {
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location = 0;
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}//else if//
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nextLocation = location + locationIncrement;
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((Frame) view).setLocation(location, location);
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*/
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}//if//
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else {
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//I could at some point wrapper the view component with a frame.//
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Debug.log("Error: The view must be a frame for it to be a valid internal view.");
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}//else//
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removeMessageHold();
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}//openView()//
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/**
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* Closes the view for the associated view controller.
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* @param viewController The view controller that provided the view.
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*/
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private void closeView(ViewController viewController) {
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viewController.close();
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}//closeView()//
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/**
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* Closes all the internal views.
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*/
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private void closeAllViews() {
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IIterator iterator = openViewControllers.iterator();
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while(iterator.hasNext()) {
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closeView((ViewController) iterator.next());
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}//while//
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openViewControllers.removeAll();
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}//closeAllViews()//
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}//Panel//
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