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wcrisman
348
Foundation SWT/src/com/foundation/view/swt/Panel.java
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348
Foundation SWT/src/com/foundation/view/swt/Panel.java
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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.view.swt;
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import javax.management.RuntimeErrorException;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.custom.ScrolledComposite;
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import org.eclipse.swt.graphics.Point;
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import org.eclipse.swt.graphics.Rectangle;
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import org.eclipse.swt.widgets.Canvas;
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import org.eclipse.swt.widgets.Composite;
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import org.eclipse.swt.widgets.Control;
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import org.eclipse.swt.widgets.Event;
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import org.eclipse.swt.widgets.Listener;
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import org.eclipse.swt.widgets.ScrollBar;
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import com.common.util.*;
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import com.common.debug.*;
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import com.foundation.view.*;
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import com.foundation.view.swt.layout.Layout;
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import com.foundation.view.swt.layout.LayoutData;
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import com.foundation.util.*;
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import com.foundation.controller.*;
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import com.foundation.event.*;
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public class Panel extends Container {
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/** The attribute that provides the collection of internal view controllers. */
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private IAttributeAssociation internalViewsAssociation = 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 ? */
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private int nextLocation = 0;
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/** The location increment ? */
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private int locationIncrement = 20;
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/** The composite used to slide the contents around if the user has requested vertical and/or horizontal scrolling. */
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private ScrolledComposite scrolledComposite;
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/** The composite used to slide the contents around if the user has requested vertical and/or horizontal scrolling. */
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private Composite composite;
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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(IAbstractContainer parent, String name, int style) {
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super(parent, name, style);
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}//Panel()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.AbstractComponent#initializeControl(int)
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*/
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protected void initializeControl(int style, Object data) {
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boolean hScroll = ((style & SWT.H_SCROLL) != 0);
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boolean vScroll = ((style & SWT.V_SCROLL) != 0);
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if(hScroll || vScroll) {
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scrolledComposite = new ScrolledComposite(((IAbstractSwtContainer) getContainer()).getSwtParent(), style);
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scrolledComposite.setData(this);
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composite = new Composite(scrolledComposite, 0);
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composite.setData(this);
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scrolledComposite.setTabList(new Control[] {composite});
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scrolledComposite.setContent(composite);
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setSwtWidget(scrolledComposite);
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scrolledComposite.setAlwaysShowScrollBars(false);
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scrolledComposite.setExpandHorizontal(true);
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scrolledComposite.setExpandVertical(true);
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scrolledComposite.setMinSize(0, 0);
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if(hScroll) {
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getSwtComposite().getHorizontalBar().setVisible(false);
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getSwtComposite().getHorizontalBar().setIncrement(20);
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}//if//
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if(vScroll) {
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getSwtComposite().getVerticalBar().setVisible(false);
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getSwtComposite().getVerticalBar().setIncrement(20);
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}//if//
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}//if//
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else {
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setSwtWidget(new org.eclipse.swt.widgets.Composite(((IAbstractSwtContainer) getContainer()).getSwtParent(), style));
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getSwtWidget().setData(this);
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}//else//
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}//initializeControl()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.Container#internalLayout()
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*/
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protected void internalLayout() {
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if(scrolledComposite != null) {
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composite.setSize(composite.computeSize(-1, -1, true));
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}//if//
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super.internalLayout();
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}//internalLayout()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.Container#postResize()
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*/
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public void postResize() {
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super.postResize();
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if(scrolledComposite != null) {
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Rectangle interior = scrolledComposite.getClientArea();
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Rectangle interior2 = null;
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scrolledComposite.setMinSize(0, 0);
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while(!interior.equals(interior2)) {
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Point size = null;
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composite.computeSize(0, 0, true);
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if(composite.getLayout() instanceof com.foundation.view.swt.layout.Layout) {
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size = ((com.foundation.view.swt.layout.Layout) composite.getLayout()).computeCurrentSize(composite);
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}//if//
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else {
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Debug.log(new RuntimeException("Only Brainstorm based layouts may be used. The layout must extend " + Layout.class.getName()));
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}//else//
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if(getSwtComposite().getHorizontalBar() != null) {
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scrolledComposite.setMinWidth(size.x);
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}//if//
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if(getSwtComposite().getVerticalBar() != null) {
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scrolledComposite.setMinHeight(size.y);
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}//if//
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interior2 = interior;
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interior = scrolledComposite.getClientArea();
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}//while//
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}//if//
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}//postResize()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.Container#getSwtParent()
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*/
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public org.eclipse.swt.widgets.Composite getSwtParent() {
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return scrolledComposite != null ? composite : getSwtComposite();
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}//getSwtParent()//
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/**
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* Sets the internal view controller collection.
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* @param internalViewsAssociation The association containing the collection of view controllers representing views that exist within this panel.
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*/
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public void setInternalViewsAssociation(IAttributeAssociation internalViewsAssociation) {
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this.internalViewsAssociation = internalViewsAssociation;
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}//setInternalViewsAssociation()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.AbstractComponent#internalViewInitialize()
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*/
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protected void internalViewInitialize() {
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if(internalViewsAssociation != null) {
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openViewControllers = new LiteList(10, 50);
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internalViewsAssociation.register();
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}//if//
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super.internalViewInitialize();
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}//internalViewInitialize()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.AbstractComponent#internalViewRelease()
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*/
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protected void internalViewRelease() {
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super.internalViewRelease();
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if(internalViewsAssociation != null) {
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internalViewsAssociation.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.view.swt.AbstractComponent#internalViewRefresh()
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*/
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protected void internalViewRefresh() {
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super.internalViewRefresh();
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if(internalViewsAssociation != null) {
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ICollection internalViewControllers = (ICollection) internalViewsAssociation.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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if(internalViewControllers instanceof IManagedCollection) {
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//Register the new event hooks.//
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synchronized(internalViewControllers) {
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eventSupport.register(((IManagedCollection) internalViewControllers), IManagedCollection.EVENT.getNumber(), this, true);
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copy = new LiteList(internalViewControllers);
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}//synchronized//
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}//if//
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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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closeView((ViewController) next);
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openViewControllers.add(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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/* (non-Javadoc)
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* @see com.foundation.view.swt.AbstractComponent#internalViewSynchronize()
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*/
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protected void internalViewSynchronize() {
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super.internalViewSynchronize();
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}//internalViewSynchronize()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.AbstractComponent#internalEvaluate(com.common.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//
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}//if//
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}//if//
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else {
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super.internalEvaluate(eventEmitter, eventNumber, arguments);
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}//else//
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}//internalEvaluate()//
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/* (non-Javadoc)
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* @see com.foundation.view.swt.Component#onValueChanged(com.foundation.view.swt.IAttributeAssociation)
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*/
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protected void internalOnValueChanged(IAttributeAssociation attributeAssociation) {
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if(attributeAssociation == internalViewsAssociation) {
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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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/**
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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 = viewController.openPartial(this, null);
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if(view instanceof Frame) {
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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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}//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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}//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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