Initial commit from SVN.
This commit is contained in:
wcrisman
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/*
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* Copyright (c) 2005,2009 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.ICollection;
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import com.common.util.IIterator;
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import com.common.util.IList;
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import com.common.util.LiteList;
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import com.foundation.util.IInlineCollectionObservable;
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import com.foundation.util.IInlineCollectionObserver;
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import com.foundation.util.IInlineIndexedCollectionObservable;
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import com.foundation.util.IInlineIndexedCollectionObserver;
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import com.foundation.view.*;
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import com.foundation.controller.RemoteViewController;
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import com.foundation.tcv.swt.*;
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import com.foundation.tcv.view.*;
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/*
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* Displays components in a stack such that only one component is visible at a time.
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*/
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public class StackViewer extends Container implements IStackViewer, IInlineIndexedCollectionObserver, IInlineCollectionObserver {
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/** The association that results in a collection of view controllers. */
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private SingleResourceAssociation views = null;
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/** The association that tracks which view is being displayed. */
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private SingleResourceAssociation visibleView = null;
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/** The previous collection of view controllers. */
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private IList viewControllers = new LiteList(1, 15);
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/** Temporarily suspends processing of events fired by registered collections. */
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private boolean suspendCollectionEvents = false;
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/**
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* StackViewer 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_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 StackViewer(Container parent, String name, int style) {
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super(parent, name, style);
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this.views = new SingleResourceAssociation(this, this, getViewContext(), SingleResourceAssociation.TYPE_OBJECT, false, null);
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this.visibleView = new SingleResourceAssociation(this, this, getViewContext(), SingleResourceAssociation.TYPE_OBJECT, false, null);
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sendMessage(MESSAGE_INITIALIZE, new int[] {parent.getNumber(), style});
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}//StackViewer()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.server.Container#setLayout(com.foundation.tcv.swt.Layout)
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*/
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public void setLayout(Layout layout) {
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//Does nothing. It does not make sense to change the layout of the wizard since it can only use the stack layout.//
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}//setLayout()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.server.Component#internalOnValueChanged(com.foundation.view.SingleResourceAssociation)
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*/
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protected void internalOnValueChanged(SingleResourceAssociation association, int flags) {
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if(association == visibleView) {
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internalRefreshVisibleView();
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}//if//
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else if(association == views) {
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internalRefreshViews();
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}//else if//
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else {
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super.internalOnValueChanged(association, flags);
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}//else//
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}//internalOnValueChanged()//
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/* (non-Javadoc)
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* @see com.foundation.tcv.swt.server.AbstractComponent#internalOnEventFired(com.foundation.tcv.swt.server.IEventAssociation, java.lang.Object[])
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*/
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protected void internalOnEventFired(IEventAssociation eventAssociation, Object[] eventArguments) {
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super.internalOnEventFired(eventAssociation, eventArguments);
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}//internalOnEventFired()//
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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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/**
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* Sets the association container used to access the views in the stack.
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* @param container The views association metadata.
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*/
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public void setViewsAssociation(SingleAssociationContainer container) {
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verifyThread();
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this.views.setAssociations(container);
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}//setViewsAssociation()//
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/**
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* Sets the association container used to access the visible view.
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* @param container The visible view association metadata.
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*/
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public void setVisibleViewAssociation(SingleAssociationContainer container) {
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verifyThread();
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this.visibleView.setAssociations(container);
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}//setVisibleViewAssociation()//
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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.StackViewer";
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}//getClientClassName()//
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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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views.initialize();
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visibleView.initialize();
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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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views.release();
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visibleView.release();
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for(int index = 0; index < viewControllers.getSize(); index++) {
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((RemoteViewController) viewControllers.get(index)).close();
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}//for//
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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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internalRefreshViews();
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internalRefreshVisibleView();
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}//internalViewRefresh()//
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/**
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* Refreshes the currently visible component.
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*/
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protected void internalRefreshViews() {
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Object oldValue = views.getValue();
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if(views.refresh()) {
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addMessageHold();
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try {
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Object newValue = views.getValue();
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//Remove listeners from the old value.//
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if(oldValue instanceof IInlineIndexedCollectionObservable) {
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((IInlineIndexedCollectionObservable) oldValue).removeCollectionObserver(this);
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}//if//
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else if(oldValue instanceof IInlineCollectionObservable) {
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((IInlineCollectionObservable) oldValue).removeCollectionObserver(this);
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}//else if//
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//Close the old view controllers.//
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for(int index = 0; index < viewControllers.getSize(); index++) {
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((RemoteViewController) viewControllers.get(index)).close();
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}//for//
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viewControllers.removeAll();
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//If the new value is a collection or object then add and remove pages as required, and add listeners as required.//
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if(newValue instanceof ICollection) {
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IIterator iterator = ((ICollection) newValue).iterator();
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//Add tabs for all the view controllers.//
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while(iterator.hasNext()) {
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Object next = iterator.next();
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//Ignore non-view controller objects.//
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if(next instanceof RemoteViewController) {
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RemoteViewController controller = (RemoteViewController) next;
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controller.openPartial(this, getViewContext());
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}//if//
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else {
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throw new RuntimeException("Expecting a view controller.");
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}//else//
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}//while//
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//Add the controllers to the list of view controllers.//
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viewControllers.addAll((ICollection) newValue);
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//Prevent collection events from notifying us of existing items in the collection.//
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suspendCollectionEvents = true;
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//Add a listener to the collection so we get change events.//
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if(newValue instanceof IInlineIndexedCollectionObservable) {
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((IInlineIndexedCollectionObservable) newValue).addCollectionObserver(this);
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}//if//
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else if(newValue instanceof IInlineCollectionObservable) {
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((IInlineCollectionObservable) newValue).addCollectionObserver(this);
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}//else if//
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//Re-enable the collection events.//
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suspendCollectionEvents = false;
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}//if//
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else if(newValue instanceof RemoteViewController) {
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RemoteViewController controller = (RemoteViewController) newValue;
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controller.openPartial(this, getViewContext());
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//Add the one controller to the list of view controllers.//
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viewControllers.add(controller);
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}//else if//
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}//try//
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finally {
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removeMessageHold();
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}//finally//
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}//if//
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}//internalRefreshViews()//
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/**
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* Refreshes the currently visible component.
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*/
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protected void internalRefreshVisibleView() {
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if(visibleView.refresh()) {
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Object view = (Object) visibleView.getValue();
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int index = viewControllers.getIndexOf(view);
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if(index >= 0) {
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sendMessage(MESSAGE_CHANGE_COMPONENT, null, null, index, -1);
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}//if//
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}//if//
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}//internalRefreshVisibleView()//
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/* (non-Javadoc)
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* @see com.foundation.util.IInlineIndexedCollectionObserver#startChanges(int)
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*/
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public void startChanges(int changeCount) {
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addMessageHold();
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//suspendRedraw();
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}//startChanges()//
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/* (non-Javadoc)
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* @see com.foundation.util.IInlineIndexedCollectionObserver#stopChanges()
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*/
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public void stopChanges() {
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//resumeRedraw();
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removeMessageHold();
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}//stopChanges()//
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/* (non-Javadoc)
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* @see com.foundation.util.IInlineCollectionObserver#valueAdded(java.lang.Object)
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*/
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public void valueAdded(Object value) {
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if((!suspendCollectionEvents) && (value instanceof RemoteViewController)) {
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viewControllers.add(value);
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((RemoteViewController) value).openPartial(this, getViewContext());
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}//if//
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}//valueAdded()//
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/* (non-Javadoc)
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* @see com.foundation.util.IInlineIndexedCollectionObserver#valueAdded(java.lang.Object, int)
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*/
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public void valueAdded(Object value, int index) {
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valueAdded(value);
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}//valueAdded()//
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/* (non-Javadoc)
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* @see com.foundation.util.IInlineCollectionObserver#valueRemoved(java.lang.Object)
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*/
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public void valueRemoved(Object value) {
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if((!suspendCollectionEvents) && (viewControllers.remove(value))) {
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((RemoteViewController) value).close();
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}//if//
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}//valueRemoved()//
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/* (non-Javadoc)
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* @see com.foundation.util.IInlineIndexedCollectionObserver#valueRemoved(java.lang.Object, int)
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*/
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public void valueRemoved(Object value, int index) {
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valueRemoved(value);
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}//valueRemoved()//
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/* (non-Javadoc)
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* @see com.foundation.util.IInlineIndexedCollectionObserver#removingAll()
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*/
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public void removingAll() {
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if(!suspendCollectionEvents) {
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IIterator iterator = viewControllers.iterator();
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startChanges(viewControllers.getSize());
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try {
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while(iterator.hasNext()) {
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valueRemoved(iterator.next());
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}//while//
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}//try//
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finally {
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stopChanges();
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}//finally//
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}//if//
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}//removingAll()//
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/* (non-Javadoc)
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* @see com.foundation.util.IInlineIndexedCollectionObserver#valuesSorted(int[])
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*/
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public void valuesSorted(int[] mapping) {
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//Does nothing.//
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}//valuesSorted()//
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}//StackViewer//
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