plugins/org.eclipse.amalgam.explorer.activity.ui/src/org/eclipse/amalgam/explorer/activity/ui/internal/preferences/ActivityExplorerSelectionBlock.java - amalgam/org.eclipse.amalgam - Git at Google

 /*******************************************************************************
  * Copyright (c)  2006, 2015 THALES GLOBAL SERVICES.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *    Thales - initial API and implementation
  *******************************************************************************/
 package org.eclipse.amalgam.explorer.activity.ui.internal.preferences;

 import java.util.Arrays;
 import java.util.List;

 import org.eclipse.amalgam.explorer.activity.ui.ActivityExplorerActivator;
 import org.eclipse.amalgam.explorer.activity.ui.api.editor.ActivityExplorerEditor;
 import org.eclipse.amalgam.explorer.activity.ui.api.manager.ActivityExplorerManager;
 import org.eclipse.amalgam.explorer.activity.ui.internal.extension.point.manager.ActivityExplorerExtensionManager;
 import org.eclipse.core.runtime.IConfigurationElement;
 import org.eclipse.core.runtime.IExtension;
 import org.eclipse.core.runtime.IExtensionPoint;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.jface.viewers.CheckStateChangedEvent;
 import org.eclipse.jface.viewers.CheckboxTableViewer;
 import org.eclipse.jface.viewers.CheckboxTreeViewer;
 import org.eclipse.jface.viewers.DoubleClickEvent;
 import org.eclipse.jface.viewers.ICheckStateListener;
 import org.eclipse.jface.viewers.ICheckStateProvider;
 import org.eclipse.jface.viewers.ICheckable;
 import org.eclipse.jface.viewers.IDoubleClickListener;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.ITreeContentProvider;
 import org.eclipse.jface.viewers.LabelProvider;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.SashForm;
 import org.eclipse.swt.custom.StyledText;
 import org.eclipse.swt.layout.FormAttachment;
 import org.eclipse.swt.layout.FormData;
 import org.eclipse.swt.layout.FormLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.ui.forms.editor.IFormPage;

 public class ActivityExplorerSelectionBlock {

 	private LabelProvider labelProvider;
 	private ITreeContentProvider contentProvider;
 	private ICheckStateProvider checkStateProvider;
 	public Controller controller;

 	public ActivityExplorerSelectionBlock() {
 		this.labelProvider = new ExtensionLabelProvider();
 		this.contentProvider = new ExtensionTreeContentProvider();
 		this.checkStateProvider = new CheckStateProvider();

 		/*
 		 * ActivityExplorerActivator.getDefault().getPreferenceStore().
 		 * addPropertyChangeListener(new IPropertyChangeListener() {
 		 *
 		 *
 		 * public void propertyChange(PropertyChangeEvent event) { //if(even)
 		 * controller.checkStateChanged(new CheckStateChangedEvent(treeArea,
 		 * event.getOldValue(), true));
 		 *
 		 * } });
 		 */
 	}

 	private CheckboxTreeViewer treeArea;
 	private CheckboxTableViewer listArea;
 	private StyledText detailsArea;

 	/**
 	 * Create the Composed Widget
 	 *
 	 * @param parent
 	 * @return the composite result
 	 */
 	public Composite createWidget(Composite parent) {
 		SashForm result = new SashForm(parent, SWT.VERTICAL);
 		result.setFont(parent.getFont());
 		SashForm topPart = new SashForm(result, SWT.HORIZONTAL);
 		createTreeViewer(topPart);
 		createPageListViewer(topPart);
 		createDetailsView(result);
 		return result;
 	}

 	/**
 	 * Create the Details Viewer Widget
 	 *
 	 * @param parent
 	 */
 	private void createDetailsView(SashForm parent) {
 		detailsArea = new StyledText(parent, SWT.READ_ONLY | SWT.MULTI | SWT.BORDER | SWT.WRAP | SWT.V_SCROLL);
 		detailsArea.setText(""); //$NON-NLS-1$
 	}

 	/**
 	 * Create the Table Viewer Widget
 	 *
 	 * @param parent
 	 */
 	private void createPageListViewer(Composite parent) {
 		Composite form = new Composite(parent, SWT.NONE);
 		FormLayout layout = new FormLayout();
 		form.setLayout(layout);
 		Label prompt = new Label(form, SWT.NONE);
 		prompt.setText(Messages.ActivityExplorerSelectionBlock_0);
 		FormData data = new FormData();
 		data.top = new FormAttachment(0, 0);
 		data.left = new FormAttachment(0, 0);
 		data.right = new FormAttachment(100, 0);
 		prompt.setLayoutData(data);

 		listArea = CheckboxTableViewer.newCheckList(form, SWT.BORDER);
 		data = new FormData();
 		data.top = new FormAttachment(prompt, 4);
 		data.left = new FormAttachment(0, 0);
 		data.right = new FormAttachment(100, 0);
 		data.bottom = new FormAttachment(100, 0);
 		listArea.getControl().setLayoutData(data);
 		listArea.setContentProvider(contentProvider);
 		listArea.setLabelProvider(labelProvider);

 		listArea.addSelectionChangedListener(getInstance());
 		listArea.addCheckStateListener(getInstance());
 		listArea.setCheckStateProvider(checkStateProvider);
 	}

 	/**
 	 * Create the Tree Viewer widget
 	 *
 	 * @param parent
 	 */
 	private void createTreeViewer(Composite parent) {
 		Composite form = new Composite(parent, SWT.NONE);
 		FormLayout layout = new FormLayout();
 		form.setLayout(layout);
 		Label prompt = new Label(form, SWT.NONE);
 		prompt.setText(Messages.ActivityExplorerSelectionBlock_1);
 		FormData data = new FormData();
 		data.top = new FormAttachment(0, 0);
 		data.left = new FormAttachment(0, 0);
 		data.right = new FormAttachment(100, 0);
 		prompt.setLayoutData(data);

 		treeArea = new CheckboxTreeViewer(form);
 		data = new FormData();
 		data.top = new FormAttachment(prompt, 4);
 		data.left = new FormAttachment(0, 0);
 		data.right = new FormAttachment(100, 0);
 		data.bottom = new FormAttachment(100, 0);
 		treeArea.getControl().setLayoutData(data);

 		treeArea.setLabelProvider(labelProvider);
 		treeArea.setContentProvider(contentProvider);

 		treeArea.setInput(ActivityExplorerExtensionManager.getExtensionPoint(ActivityExplorerExtensionManager.PROVIDER_PAGES_EXT));
 		treeArea.addSelectionChangedListener(getInstance());
 		treeArea.addCheckStateListener(getInstance());
 		treeArea.addDoubleClickListener(new IDoubleClickListener() {

 			public void doubleClick(DoubleClickEvent event) {
 				ISelection iselection = event.getSelection();
 				if (iselection instanceof IStructuredSelection) {
 					IStructuredSelection selection = (IStructuredSelection) iselection;
 					Object obj = selection.getFirstElement();
 					if (obj instanceof IConfigurationElement) {
 						IConfigurationElement elt = (IConfigurationElement) obj;
 						if (elt.getName().equals(ActivityExplorerExtensionManager.PAGE)) {
 							String id = ActivityExplorerExtensionManager.getId(elt);
 							ActivityExplorerEditor editor = ActivityExplorerManager.INSTANCE.getEditor();
 							if (editor != null) {
 								IFormPage page = editor.findPage(id);
 								if (page != null) {
 									ActivityExplorerManager.INSTANCE.getEditor().setActivePage(id);
 								}
 							}
 						}
 					}
 				}

 			}
 		});
 		treeArea.setCheckStateProvider(checkStateProvider);

 	}

 	/**
 	 * A basic label provider fo {@link IConfigurationElement}I
 	 *
 	 *
 	 */
 	private class ExtensionLabelProvider extends LabelProvider {
 		@Override
 		public String getText(Object element) {

 			if (element instanceof IConfigurationElement) {

 				IConfigurationElement elt = (IConfigurationElement) element;
 				return ActivityExplorerExtensionManager.getName(elt);

 			}

 			return super.getText(element);
 		}
 	}

 	/**
 	 * A basic tree content provider for {@link IConfigurationElement}
 	 *
 	 *
 	 */
 	private class ExtensionTreeContentProvider implements ITreeContentProvider {

 		public void dispose() {
 			// do nothing
 		}

 		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 			// do nothing
 		}

 		public Object[] getElements(Object inputElement) {
 			return getChildren(inputElement);
 		}

 		public Object[] getChildren(Object parentElement) {
 			if (parentElement instanceof IExtensionPoint) {
 				return ActivityExplorerExtensionManager.getAllProviderExtensions();
 			}
 			if (parentElement instanceof IConfigurationElement) {
 				String category = ActivityExplorerExtensionManager.SECTION;
 				IConfigurationElement elt = (IConfigurationElement) parentElement;
 				if (elt.getName().equals(ActivityExplorerExtensionManager.PAGE)) {
 					category = ActivityExplorerExtensionManager.SECTION;
 					List<IConfigurationElement> result = ActivityExplorerExtensionManager
 							.getAllSectionsExtensionForPageId(ActivityExplorerExtensionManager.getId(elt));
 					result.addAll(Arrays.asList(elt.getChildren(category)));

 					return result.toArray();
 				}
 				if (elt.getName().equals(ActivityExplorerExtensionManager.SECTION)) {
 					category = ActivityExplorerExtensionManager.ACTIVITY;
 					List<IConfigurationElement> result = ActivityExplorerExtensionManager
 							.getAllActivitiesExtensionForSectionId(ActivityExplorerExtensionManager.getId(elt));
 					result.addAll(Arrays.asList(elt.getChildren(category)));
 					return result.toArray();
 				}

 			}

 			return null;
 		}

 		public Object getParent(Object element) {
 			Object parent = null;
 			if (element instanceof IExtensionPoint) {
 				parent = ((IExtensionPoint) element);
 			}
 			if (element instanceof IConfigurationElement) {
 				parent = ((IConfigurationElement) element).getParent();
 			}
 			return parent;
 		}

 		public boolean hasChildren(Object element) {

 			if (element instanceof IConfigurationElement) {
 				IConfigurationElement elt = (IConfigurationElement) element;
 				return elt.getName().equals(ActivityExplorerExtensionManager.PAGE) && elt.getChildren().length > 0;
 			}
 			return false;
 		}

 	}

 	/**
 	 * Get the Tree Viewer instance
 	 *
 	 * @return {@link Viewer}
 	 */
 	public Viewer getTreeViewer() {
 		return treeArea;
 	}

 	/**
 	 * Get the Table Viewer instance
 	 *
 	 * @return {@link Viewer}
 	 */
 	public Viewer getTableViewer() {
 		return listArea;
 	}

 	/**
 	 * Get the Singleton controller
 	 *
 	 * @return the Controller
 	 */
 	private Controller getInstance() {
 		if (controller == null)
 			controller = new Controller();
 		return controller;
 	}

 	/**
 	 * A basic Controller Class It implements {@link ISelectionChangedListener}
 	 * and {@link ICheckStateListener}
 	 *
 	 *
 	 */
 	public class Controller implements ISelectionChangedListener, ICheckStateListener {

 		protected void setDefaultValue(Object element) {

 			boolean defaultValue = ActivityExplorerActivator.getDefault().getPreferenceStore()
 					.getDefaultBoolean(ActivityExplorerExtensionManager.getId((IConfigurationElement) element));

 			checkStateChanged(new CheckStateChangedEvent((ICheckable) getTableViewer(), element, defaultValue));

 		}

 		public void checkStateChanged(CheckStateChangedEvent event) {
 			Object element = event.getElement();
 			boolean checked = event.getChecked();
 			ICheckable source = (ICheckable) event.getSource();

 			if (element instanceof IConfigurationElement) {

 				IConfigurationElement elt = (IConfigurationElement) element;
 				String id = ActivityExplorerExtensionManager.getId(elt);
 				updateCheckedStateChildren(elt, source, checked); // dont move
 																	// the order
 				ActivityExplorerActivator.getDefault().getPreferenceStore() // dont
 																		// move
 																		// the
 																		// order
 						.setValue(id, checked);
 				updateCheckedStateParent(elt, source, checked); // dont move the
 																// order
 				refreshVisual();
 			}
 		}

 		private void refreshVisual() {
 			treeArea.refresh();
 			listArea.refresh();
 		}

 		private void updateCheckedStateChildren(IConfigurationElement elt, ICheckable source, boolean state) {
 			ITreeContentProvider provider = (ITreeContentProvider) treeArea.getContentProvider();
 			Object[] children = provider.getElements(elt);
 			if (null != children) {
 				for (Object child : children) {
 					checkStateChanged(new CheckStateChangedEvent(source, child, state));
 				}
 			}

 		}

 		private void updateCheckedStateParent(IConfigurationElement elt, ICheckable source, boolean state) {
 			ITreeContentProvider provider = (ITreeContentProvider) treeArea.getContentProvider();
 			Object parent = provider.getParent(elt);
 			if (null != parent && !(parent instanceof IExtension) && state) {
 				IConfigurationElement p = (IConfigurationElement) parent;
 				String id = ActivityExplorerExtensionManager.getId(p);
 				ActivityExplorerActivator.getDefault().getPreferenceStore().setValue(id, state);
 			}
 		}

 		public void selectionChanged(SelectionChangedEvent event) {
 			ISelection selection = event.getSelection();
 			Object source = event.getSource();
 			if (null != selection && selection instanceof IStructuredSelection) {
 				IStructuredSelection selected = (IStructuredSelection) selection;
 				IConfigurationElement elt = (IConfigurationElement) selected.getFirstElement();

 				if (source.equals(ActivityExplorerSelectionBlock.this.getTreeViewer())) {
 					listArea.setInput(elt);
 				}
 				String description = ActivityExplorerExtensionManager.getDescription(elt);
 				if (description == null) {
 					detailsArea.setText("");//$NON-NLS-1$
 				} else {
 					detailsArea.setText(description);
 				}

 			}

 		}

 	}

 	/**
 	 * A basic Cheched State Provider Class It implements
 	 * {@link ICheckStateProvider}
 	 *
 	 *
 	 */
 	private class CheckStateProvider implements ICheckStateProvider {

 		public boolean isGrayed(Object element) {
 			return false;
 		}

 		public boolean isChecked(Object element) {
 			boolean value = false;
 			IConfigurationElement elt = (IConfigurationElement) element;
 			String id = ActivityExplorerExtensionManager.getId(elt);
 			IPreferenceStore prefs = ActivityExplorerActivator.getDefault().getPreferenceStore();
 			value = prefs.getBoolean(id);
 			return value;
 		}

 	}

 }
	/*******************************************************************************
	* Copyright (c) 2006, 2015 THALES GLOBAL SERVICES.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* Thales - initial API and implementation
	*******************************************************************************/
	package org.eclipse.amalgam.explorer.activity.ui.internal.preferences;

	import java.util.Arrays;
	import java.util.List;

	import org.eclipse.amalgam.explorer.activity.ui.ActivityExplorerActivator;
	import org.eclipse.amalgam.explorer.activity.ui.api.editor.ActivityExplorerEditor;
	import org.eclipse.amalgam.explorer.activity.ui.api.manager.ActivityExplorerManager;
	import org.eclipse.amalgam.explorer.activity.ui.internal.extension.point.manager.ActivityExplorerExtensionManager;
	import org.eclipse.core.runtime.IConfigurationElement;
	import org.eclipse.core.runtime.IExtension;
	import org.eclipse.core.runtime.IExtensionPoint;
	import org.eclipse.jface.preference.IPreferenceStore;
	import org.eclipse.jface.viewers.CheckStateChangedEvent;
	import org.eclipse.jface.viewers.CheckboxTableViewer;
	import org.eclipse.jface.viewers.CheckboxTreeViewer;
	import org.eclipse.jface.viewers.DoubleClickEvent;
	import org.eclipse.jface.viewers.ICheckStateListener;
	import org.eclipse.jface.viewers.ICheckStateProvider;
	import org.eclipse.jface.viewers.ICheckable;
	import org.eclipse.jface.viewers.IDoubleClickListener;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.ITreeContentProvider;
	import org.eclipse.jface.viewers.LabelProvider;
	import org.eclipse.jface.viewers.SelectionChangedEvent;
	import org.eclipse.jface.viewers.Viewer;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.SashForm;
	import org.eclipse.swt.custom.StyledText;
	import org.eclipse.swt.layout.FormAttachment;
	import org.eclipse.swt.layout.FormData;
	import org.eclipse.swt.layout.FormLayout;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.ui.forms.editor.IFormPage;

	public class ActivityExplorerSelectionBlock {

	private LabelProvider labelProvider;
	private ITreeContentProvider contentProvider;
	private ICheckStateProvider checkStateProvider;
	public Controller controller;

	public ActivityExplorerSelectionBlock() {
	this.labelProvider = new ExtensionLabelProvider();
	this.contentProvider = new ExtensionTreeContentProvider();
	this.checkStateProvider = new CheckStateProvider();

	/*
	* ActivityExplorerActivator.getDefault().getPreferenceStore().
	* addPropertyChangeListener(new IPropertyChangeListener() {
	*
	*
	* public void propertyChange(PropertyChangeEvent event) { //if(even)
	* controller.checkStateChanged(new CheckStateChangedEvent(treeArea,
	* event.getOldValue(), true));
	*
	* } });
	*/
	}

	private CheckboxTreeViewer treeArea;
	private CheckboxTableViewer listArea;
	private StyledText detailsArea;

	/**
	* Create the Composed Widget
	*
	* @param parent
	* @return the composite result
	*/
	public Composite createWidget(Composite parent) {
	SashForm result = new SashForm(parent, SWT.VERTICAL);
	result.setFont(parent.getFont());
	SashForm topPart = new SashForm(result, SWT.HORIZONTAL);
	createTreeViewer(topPart);
	createPageListViewer(topPart);
	createDetailsView(result);
	return result;
	}

	/**
	* Create the Details Viewer Widget
	*
	* @param parent
	*/
	private void createDetailsView(SashForm parent) {
	detailsArea = new StyledText(parent, SWT.READ_ONLY \| SWT.MULTI \| SWT.BORDER \| SWT.WRAP \| SWT.V_SCROLL);
	detailsArea.setText(""); //$NON-NLS-1$
	}

	/**
	* Create the Table Viewer Widget
	*
	* @param parent
	*/
	private void createPageListViewer(Composite parent) {
	Composite form = new Composite(parent, SWT.NONE);
	FormLayout layout = new FormLayout();
	form.setLayout(layout);
	Label prompt = new Label(form, SWT.NONE);
	prompt.setText(Messages.ActivityExplorerSelectionBlock_0);
	FormData data = new FormData();
	data.top = new FormAttachment(0, 0);
	data.left = new FormAttachment(0, 0);
	data.right = new FormAttachment(100, 0);
	prompt.setLayoutData(data);

	listArea = CheckboxTableViewer.newCheckList(form, SWT.BORDER);
	data = new FormData();
	data.top = new FormAttachment(prompt, 4);
	data.left = new FormAttachment(0, 0);
	data.right = new FormAttachment(100, 0);
	data.bottom = new FormAttachment(100, 0);
	listArea.getControl().setLayoutData(data);
	listArea.setContentProvider(contentProvider);
	listArea.setLabelProvider(labelProvider);

	listArea.addSelectionChangedListener(getInstance());
	listArea.addCheckStateListener(getInstance());
	listArea.setCheckStateProvider(checkStateProvider);
	}

	/**
	* Create the Tree Viewer widget
	*
	* @param parent
	*/
	private void createTreeViewer(Composite parent) {
	Composite form = new Composite(parent, SWT.NONE);
	FormLayout layout = new FormLayout();
	form.setLayout(layout);
	Label prompt = new Label(form, SWT.NONE);
	prompt.setText(Messages.ActivityExplorerSelectionBlock_1);
	FormData data = new FormData();
	data.top = new FormAttachment(0, 0);
	data.left = new FormAttachment(0, 0);
	data.right = new FormAttachment(100, 0);
	prompt.setLayoutData(data);

	treeArea = new CheckboxTreeViewer(form);
	data = new FormData();
	data.top = new FormAttachment(prompt, 4);
	data.left = new FormAttachment(0, 0);
	data.right = new FormAttachment(100, 0);
	data.bottom = new FormAttachment(100, 0);
	treeArea.getControl().setLayoutData(data);

	treeArea.setLabelProvider(labelProvider);
	treeArea.setContentProvider(contentProvider);

	treeArea.setInput(ActivityExplorerExtensionManager.getExtensionPoint(ActivityExplorerExtensionManager.PROVIDER_PAGES_EXT));
	treeArea.addSelectionChangedListener(getInstance());
	treeArea.addCheckStateListener(getInstance());
	treeArea.addDoubleClickListener(new IDoubleClickListener() {

	public void doubleClick(DoubleClickEvent event) {
	ISelection iselection = event.getSelection();
	if (iselection instanceof IStructuredSelection) {
	IStructuredSelection selection = (IStructuredSelection) iselection;
	Object obj = selection.getFirstElement();
	if (obj instanceof IConfigurationElement) {
	IConfigurationElement elt = (IConfigurationElement) obj;
	if (elt.getName().equals(ActivityExplorerExtensionManager.PAGE)) {
	String id = ActivityExplorerExtensionManager.getId(elt);
	ActivityExplorerEditor editor = ActivityExplorerManager.INSTANCE.getEditor();
	if (editor != null) {
	IFormPage page = editor.findPage(id);
	if (page != null) {
	ActivityExplorerManager.INSTANCE.getEditor().setActivePage(id);
	}
	}
	}
	}
	}

	}
	});
	treeArea.setCheckStateProvider(checkStateProvider);

	}

	/**
	* A basic label provider fo {@link IConfigurationElement}I
	*
	*
	*/
	private class ExtensionLabelProvider extends LabelProvider {
	@Override
	public String getText(Object element) {

	if (element instanceof IConfigurationElement) {

	IConfigurationElement elt = (IConfigurationElement) element;
	return ActivityExplorerExtensionManager.getName(elt);

	}

	return super.getText(element);
	}
	}

	/**
	* A basic tree content provider for {@link IConfigurationElement}
	*
	*
	*/
	private class ExtensionTreeContentProvider implements ITreeContentProvider {

	public void dispose() {
	// do nothing
	}

	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
	// do nothing
	}

	public Object[] getElements(Object inputElement) {
	return getChildren(inputElement);
	}

	public Object[] getChildren(Object parentElement) {
	if (parentElement instanceof IExtensionPoint) {
	return ActivityExplorerExtensionManager.getAllProviderExtensions();
	}
	if (parentElement instanceof IConfigurationElement) {
	String category = ActivityExplorerExtensionManager.SECTION;
	IConfigurationElement elt = (IConfigurationElement) parentElement;
	if (elt.getName().equals(ActivityExplorerExtensionManager.PAGE)) {
	category = ActivityExplorerExtensionManager.SECTION;
	List<IConfigurationElement> result = ActivityExplorerExtensionManager
	.getAllSectionsExtensionForPageId(ActivityExplorerExtensionManager.getId(elt));
	result.addAll(Arrays.asList(elt.getChildren(category)));

	return result.toArray();
	}
	if (elt.getName().equals(ActivityExplorerExtensionManager.SECTION)) {
	category = ActivityExplorerExtensionManager.ACTIVITY;
	List<IConfigurationElement> result = ActivityExplorerExtensionManager
	.getAllActivitiesExtensionForSectionId(ActivityExplorerExtensionManager.getId(elt));
	result.addAll(Arrays.asList(elt.getChildren(category)));
	return result.toArray();
	}

	}

	return null;
	}

	public Object getParent(Object element) {
	Object parent = null;
	if (element instanceof IExtensionPoint) {
	parent = ((IExtensionPoint) element);
	}
	if (element instanceof IConfigurationElement) {
	parent = ((IConfigurationElement) element).getParent();
	}
	return parent;
	}

	public boolean hasChildren(Object element) {

	if (element instanceof IConfigurationElement) {
	IConfigurationElement elt = (IConfigurationElement) element;
	return elt.getName().equals(ActivityExplorerExtensionManager.PAGE) && elt.getChildren().length > 0;
	}
	return false;
	}

	}

	/**
	* Get the Tree Viewer instance
	*
	* @return {@link Viewer}
	*/
	public Viewer getTreeViewer() {
	return treeArea;
	}

	/**
	* Get the Table Viewer instance
	*
	* @return {@link Viewer}
	*/
	public Viewer getTableViewer() {
	return listArea;
	}

	/**
	* Get the Singleton controller
	*
	* @return the Controller
	*/
	private Controller getInstance() {
	if (controller == null)
	controller = new Controller();
	return controller;
	}

	/**
	* A basic Controller Class It implements {@link ISelectionChangedListener}
	* and {@link ICheckStateListener}
	*
	*
	*/
	public class Controller implements ISelectionChangedListener, ICheckStateListener {

	protected void setDefaultValue(Object element) {

	boolean defaultValue = ActivityExplorerActivator.getDefault().getPreferenceStore()
	.getDefaultBoolean(ActivityExplorerExtensionManager.getId((IConfigurationElement) element));

	checkStateChanged(new CheckStateChangedEvent((ICheckable) getTableViewer(), element, defaultValue));

	}

	public void checkStateChanged(CheckStateChangedEvent event) {
	Object element = event.getElement();
	boolean checked = event.getChecked();
	ICheckable source = (ICheckable) event.getSource();

	if (element instanceof IConfigurationElement) {

	IConfigurationElement elt = (IConfigurationElement) element;
	String id = ActivityExplorerExtensionManager.getId(elt);
	updateCheckedStateChildren(elt, source, checked); // dont move
	// the order
	ActivityExplorerActivator.getDefault().getPreferenceStore() // dont
	// move
	// the
	// order
	.setValue(id, checked);
	updateCheckedStateParent(elt, source, checked); // dont move the
	// order
	refreshVisual();
	}
	}

	private void refreshVisual() {
	treeArea.refresh();
	listArea.refresh();
	}

	private void updateCheckedStateChildren(IConfigurationElement elt, ICheckable source, boolean state) {
	ITreeContentProvider provider = (ITreeContentProvider) treeArea.getContentProvider();
	Object[] children = provider.getElements(elt);
	if (null != children) {
	for (Object child : children) {
	checkStateChanged(new CheckStateChangedEvent(source, child, state));
	}
	}

	}

	private void updateCheckedStateParent(IConfigurationElement elt, ICheckable source, boolean state) {
	ITreeContentProvider provider = (ITreeContentProvider) treeArea.getContentProvider();
	Object parent = provider.getParent(elt);
	if (null != parent && !(parent instanceof IExtension) && state) {
	IConfigurationElement p = (IConfigurationElement) parent;
	String id = ActivityExplorerExtensionManager.getId(p);
	ActivityExplorerActivator.getDefault().getPreferenceStore().setValue(id, state);
	}
	}

	public void selectionChanged(SelectionChangedEvent event) {
	ISelection selection = event.getSelection();
	Object source = event.getSource();
	if (null != selection && selection instanceof IStructuredSelection) {
	IStructuredSelection selected = (IStructuredSelection) selection;
	IConfigurationElement elt = (IConfigurationElement) selected.getFirstElement();

	if (source.equals(ActivityExplorerSelectionBlock.this.getTreeViewer())) {
	listArea.setInput(elt);
	}
	String description = ActivityExplorerExtensionManager.getDescription(elt);
	if (description == null) {
	detailsArea.setText("");//$NON-NLS-1$
	} else {
	detailsArea.setText(description);
	}

	}

	}

	}

	/**
	* A basic Cheched State Provider Class It implements
	* {@link ICheckStateProvider}
	*
	*
	*/
	private class CheckStateProvider implements ICheckStateProvider {

	public boolean isGrayed(Object element) {
	return false;
	}

	public boolean isChecked(Object element) {
	boolean value = false;
	IConfigurationElement elt = (IConfigurationElement) element;
	String id = ActivityExplorerExtensionManager.getId(elt);
	IPreferenceStore prefs = ActivityExplorerActivator.getDefault().getPreferenceStore();
	value = prefs.getBoolean(id);
	return value;
	}

	}

	}