Initial commit from SVN.
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wcrisman
219
Foundation SWT/src/com/foundation/view/swt/Layout.java
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219
Foundation SWT/src/com/foundation/view/swt/Layout.java
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/*
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* Copyright (c) 2007,2009 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 org.eclipse.swt.widgets.Composite;
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import com.common.debug.Debug;
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import com.common.util.IIterator;
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import com.foundation.controller.DecorationManager;
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import com.foundation.view.AbstractDecoration;
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import com.foundation.view.IVariableResourceAssociationChangeListener;
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import com.foundation.view.IViewContext;
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import com.foundation.view.ResourceAssociation;
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import com.foundation.view.resource.AbstractResourceService;
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public abstract class Layout implements IVariableResourceAssociationChangeListener {
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/** The container that uses this layout. Only one of the container or cellContainer will be provided. */
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private IAbstractSwtContainer container = null;
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/** The cell container that uses this layout. */
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private ICellContainer cellContainer = null;
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/** Whether the layout has been initialized yet. */
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private boolean isInitialized = false;
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/**
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* A handler that is called to apply a set of changes to one or more layout.
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*/
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public interface IChangeHandler {
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/**
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* Applies the changes to the layout.
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* @param composite The composite whose layout to apply the changes to.
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*/
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public void applyChanges(org.eclipse.swt.widgets.Composite composite);
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}//IChangeHandler//
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/**
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* Layout constructor.
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* @param container The container that is using the layout.
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*/
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public Layout(IAbstractSwtContainer container) {
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this.container = container;
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}//Layout()//
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/**
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* Layout constructor.
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* @param cellContainer The cell container that is using the layout.
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*/
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public Layout(ICellContainer cellContainer) {
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if(cellContainer instanceof IAbstractSwtContainer) {
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this.container = (IAbstractSwtContainer) cellContainer;
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}//if//
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else {
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this.cellContainer = cellContainer;
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}//else//
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}//Layout()//
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/**
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* Gets whether the layout is already initialized.
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* @return Whether the layout has been initialized yet.
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*/
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public boolean isInitialized() {
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return isInitialized;
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}//isInitialized()//
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/**
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* Calls layout on the container.
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* @param rowObject The optional row object with which the container is associated.
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* @param changed If the container's cache should be flushed.
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* @param all If all the children also require laying out.
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*/
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protected void layoutContainer(Object rowObject, boolean changed, boolean all) {
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if(getCellContainer() != null) {
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if(rowObject != null) {
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getCellContainer().getSwtComposite(rowObject).layout(changed, all);
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}//if//
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else {
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IIterator iterator = getCellContainer().getSwtComposites();
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while(iterator.hasNext()) {
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((Composite) iterator.next()).layout(changed, all);
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}//while//
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}//else//
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}//if//
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else {
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getContainer().getSwtComposite().layout(changed, all);
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}//else//
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}//layoutContainer()//
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/**
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* Applies changes to the layout in the container.
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* @param rowObject The optional row object with which the container is associated.
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* @param handler The handler called to make the actual changes.
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*/
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protected void applyChanges(Object rowObject, IChangeHandler handler) {
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if(getCellContainer() != null) {
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if(rowObject != null) {
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handler.applyChanges(getCellContainer().getSwtComposite(rowObject));
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}//if//
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else {
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IIterator iterator = getCellContainer().getSwtComposites();
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while(iterator.hasNext()) {
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handler.applyChanges((Composite) iterator.next());
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}//while//
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}//else//
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}//if//
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else {
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if(getContainer().getSwtComposite() != null && !getContainer().getSwtComposite().isDisposed()) {
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handler.applyChanges(getContainer().getSwtComposite());
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}//if//
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}//else//
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}//applyChanges()//
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/**
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* Gets the view context for the layout.
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* @return The layout's view context.
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*/
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protected IViewContext getViewContext() {
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return container.getViewContext();
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}//getViewContext()//
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/**
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* Gets the container using this layout.
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* @return The container that this layout supports.
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*/
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protected IAbstractSwtContainer getContainer() {
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return container;
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}//getContainer()//
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/**
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* Gets the cell container using this layout.
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* @return The cell container that this layout supports.
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*/
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protected ICellContainer getCellContainer() {
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return cellContainer;
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}//getCellContainer()//
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/**
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* Creates a layout that is used by an SWT control.
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* @param rowObject The optional row object that the layout is associated with. This should be provided if the cellComponent is specified, otherwise it should be null.
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* @return The SWT layout.
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*/
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public abstract org.eclipse.swt.widgets.Layout createLayout(Object rowObject);
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/**
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* Initializes the layout.
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*/
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public abstract void initialize();
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/**
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* Refreshes the layout by transfering data from the model to the view.
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*/
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public abstract void refresh();
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/**
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* Synchronizes the layout by transfering data from the view to the model.
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*/
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public abstract void synchronize();
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/**
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* Releases the layout.
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*/
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public abstract void release();
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/* (non-Javadoc)
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* @see com.foundation.view.ISingleResourceAssociationChangeListener#addDecoration(com.foundation.view.AbstractDecoration)
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*/
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public void addDecoration(AbstractDecoration decoration) {
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}//addDecoration()//
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/* (non-Javadoc)
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* @see com.foundation.view.IMultiResourceAssociationChangeListener#addDecoration(com.foundation.view.ResourceAssociation, java.lang.Object, java.lang.Object, com.foundation.view.AbstractDecoration)
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*/
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public void addDecoration(ResourceAssociation association, Object row, Object data, AbstractDecoration decoration) {
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}//addDecoration()//
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/* (non-Javadoc)
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* @see com.foundation.view.ISingleResourceAssociationChangeListener#addMessageHold()
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*/
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public void addMessageHold() {
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}//addMessageHold()//
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/* (non-Javadoc)
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* @see com.foundation.view.ISingleResourceAssociationChangeListener#getDecorationManager()
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*/
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public DecorationManager getDecorationManager() {
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return container.getDecorationManager();
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}//getDecorationManager()//
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/* (non-Javadoc)
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* @see com.foundation.view.ISingleResourceAssociationChangeListener#getResourceService()
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*/
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public AbstractResourceService getResourceService() {
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return container.getResourceService();
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}//getResourceService()//
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/* (non-Javadoc)
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* @see com.foundation.view.ISingleResourceAssociationChangeListener#onValueChanged(com.foundation.view.ResourceAssociation)
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*/
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public void onValueChanged(ResourceAssociation resourceAssociation, int flags) {
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Debug.log(new RuntimeException("Error: Unexpected (unhandled by Layout) resource association found. Resource URL: " + resourceAssociation.toString()));
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}//onValueChanged()//
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/* (non-Javadoc)
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* @see com.foundation.view.IMultiResourceAssociationChangeListener#onValueChanged(com.foundation.view.ResourceAssociation, java.lang.Object, java.lang.Object, boolean)
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*/
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public void onValueChanged(ResourceAssociation resourceAssociation, Object alteredItem, Object data, boolean isUpdate) {
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Debug.log(new RuntimeException("Error: Unexpected (unhandled by Layout) resource association found. Resource URL: " + resourceAssociation.toString()));
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}//onValueChanged()//
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/* (non-Javadoc)
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* @see com.foundation.view.IMultiResourceAssociationChangeListener#onModelExternallyChanged(com.foundation.view.ResourceAssociation, java.lang.Object, java.lang.Object, boolean, java.lang.Object)
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*/
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public void onModelExternallyChanged(ResourceAssociation resourceAssociation, Object alteredItem, Object data, boolean isCleared, Object originalValue) {
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}//onModelExternallyChanged()//
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/* (non-Javadoc)
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* @see com.foundation.view.ISingleResourceAssociationChangeListener#onModelExternallyChanged(com.foundation.view.ResourceAssociation, boolean, java.lang.Object)
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*/
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public void onModelExternallyChanged(ResourceAssociation resourceAssociation, boolean isCleared, Object originalValue) {
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}//onModelExternallyChanged()//
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/* (non-Javadoc)
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* @see com.foundation.view.ISingleResourceAssociationChangeListener#removeDecoration(com.foundation.view.AbstractDecoration)
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*/
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public void removeDecoration(AbstractDecoration decoration) {
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}//removeDecoration()//
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/* (non-Javadoc)
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* @see com.foundation.view.ISingleResourceAssociationChangeListener#removeMessageHold()
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*/
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public void removeMessageHold() {
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}//removeMessageHold()//
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/* (non-Javadoc)
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* @see com.foundation.view.IMultiResourceAssociationChangeListener#removeDecoration(com.foundation.view.ResourceAssociation, java.lang.Object, java.lang.Object, com.foundation.view.AbstractDecoration)
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*/
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public void removeDecoration(ResourceAssociation association, Object row, Object data, AbstractDecoration decoration) {
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}//removeDecoration()//
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}//Layout//
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