jsf/plugins/org.eclipse.jst.pagedesigner/src/org/eclipse/jst/pagedesigner/editors/palette/DesignerPaletteCustomizerDialog.java - jsf/webtools.jsf - Git at Google

 /*******************************************************************************
  * Copyright (c) 2006 Sybase, Inc. and others.
  *
  * 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:
  *     Sybase, Inc. - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jst.pagedesigner.editors.palette;

 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;

 import org.eclipse.gef.palette.PaletteEntry;
 import org.eclipse.gef.ui.palette.PaletteCustomizer;
 import org.eclipse.gef.ui.palette.customize.PaletteCustomizationAction;
 import org.eclipse.gef.ui.palette.customize.PaletteCustomizerDialog;
 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.viewers.ITreeContentProvider;
 import org.eclipse.jface.viewers.TreeViewer;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.jst.jsf.common.ui.internal.utils.PluginImageHelper;
 import org.eclipse.jst.pagedesigner.PDPlugin;
 import org.eclipse.jst.pagedesigner.editors.pagedesigner.PageDesignerResources;
 import org.eclipse.jst.pagedesigner.editors.palette.impl.PaletteItemManager;
 import org.eclipse.jst.pagedesigner.editors.palette.impl.TaglibPaletteDrawer;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.FileDialog;
 import org.eclipse.swt.widgets.Shell;

 /**
  * Customization dialog for Web Page Designer palette items
  * @author mengbo
  * @version 1.5
  */
 public class DesignerPaletteCustomizerDialog extends PaletteCustomizerDialog {
 	private static final String DEFAULT_CUSTOMIZATIONS_EXPORT_FILENAME = "WPDPaletteCustomizations.xml"; //$NON-NLS-1$

 	private static String DEFAULTEXTENSION = ".xml";//$NON-NLS-1$

 	/**
 	 * Constructor
 	 * @param shell
 	 * @param customizer
 	 * @param root
 	 */
 	public DesignerPaletteCustomizerDialog(Shell shell,
 			PaletteCustomizer customizer, DesignerPaletteRoot root) {
 		super(shell, customizer, root);

 	}

 	private PropertyChangeListener applyButtonUpdater = new PropertyChangeListener() {


 		public void propertyChange(PropertyChangeEvent evt) {
 			Button applyButton = getButton(PaletteCustomizerDialog.APPLY_ID);
 			if (applyButton == null) {
 				return;
 			}
 			applyButton.setEnabled(true);
 		}
 	};

 	/* (non-Javadoc)
 	 * @see org.eclipse.jface.window.Window#open()
 	 */
 	public int open() {
 		// save the current state before open
 		// save();
 		return super.open();
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.gef.ui.palette.customize.PaletteCustomizerDialog#setActiveEntry(org.eclipse.gef.palette.PaletteEntry)
 	 */
 	protected void setActiveEntry(PaletteEntry entry) {
 		//remove listener on previous entry before adding to new entry
 		PaletteEntry pre = getSelectedPaletteEntry();
 		if (pre != null) {
 			pre.removePropertyChangeListener(applyButtonUpdater);
 		} else {
 			getButton(APPLY_ID).setEnabled(false);
 		}

 		if (entry != null)
 			entry.addPropertyChangeListener(applyButtonUpdater);

 		super.setActiveEntry(entry);
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.gef.ui.palette.customize.PaletteCustomizerDialog#save()
 	 */
 	protected void save() {
 		super.save();
 		Button applyButton = getButton(PaletteCustomizerDialog.APPLY_ID);
 		if (applyButton != null) {
 			applyButton.setEnabled(false);
 		}
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.gef.ui.palette.customize.PaletteCustomizerDialog#createButtonsForButtonBar(org.eclipse.swt.widgets.Composite)
 	 */
 	protected void createButtonsForButtonBar(Composite parent) {
 		super.createButtonsForButtonBar(parent);
 		getButton(APPLY_ID).setEnabled(false);
 		// save();
 	}

 	/* (non-Javadoc)
 	 * Export action
 	 *
 	 */
 	private class ExportAction extends PaletteCustomizationAction {

 		/**
 		 * Constructor
 		 */
 		public ExportAction() {
 			setEnabled(true);
 			setText(PageDesignerResources.getInstance().getString(
 					"DesignerPaletteCustomizerDialog.label.export")); //$NON-NLS-1$
 			setImageDescriptor(PluginImageHelper.getInstance()
 					.getImageDescriptor(DesignerPaletteImages.IMG_ELCL_EXPORT,
 							PDPlugin.getPluginId()));
 			setDisabledImageDescriptor(PluginImageHelper.getInstance()
 					.getImageDescriptor(DesignerPaletteImages.IMG_DLCL_EXPORT,
 							PDPlugin.getPluginId()));
 			setHoverImageDescriptor(PluginImageHelper.getInstance()
 					.getImageDescriptor(DesignerPaletteImages.IMG_CLCL_EXPORT,
 							PDPlugin.getPluginId()));
 		}

 		private void handleExport() {
 			final FileDialog fileDialog = new FileDialog(PDPlugin
 					.getActiveWorkbenchShell());
 			fileDialog.setFileName(DEFAULT_CUSTOMIZATIONS_EXPORT_FILENAME);
 			String[] filterExtensions = new String[2];
 			filterExtensions[0] = "*.xml"; //$NON-NLS-1$
 			filterExtensions[1] = "*.*"; //$NON-NLS-1$
 			fileDialog.setFilterExtensions(filterExtensions);
 			fileDialog.setText(Messages.DesignerPaletteCustomizerDialog_ExportCustomizations);
 			String filename = fileDialog.open();
 			if (filename != null) {
 				if (!filename.endsWith(DEFAULTEXTENSION)) {
 					filename = filename + DEFAULTEXTENSION;
 				}
 				final IPaletteContext context = PaletteItemManager.createPaletteContext(((DesignerPaletteRoot)getPaletteRoot()).getFile());
 				DesignerPaletteCustomizationsHelper
 					.exportCustomizations(PaletteItemManager.getInstance(context), filename);


 				updateActions();
 			}
 		}

 		/* (non-Javadoc)
 		 * @see org.eclipse.jface.action.Action#run()
 		 */
 		public void run() {
 			handleExport();
 		}

 		/* (non-Javadoc)
 		 * @see org.eclipse.gef.ui.palette.customize.PaletteCustomizationAction#update()
 		 */
 		public void update() {
 			//boolean enabled = false;
 //			PaletteEntry entry = getSelectedPaletteEntry();
 //			if (entry != null) {
 				// if (getCustomizer() instanceof DesignerPaletteCustomizer)
 				// enabled = ((DesignerPaletteCustomizer)
 				// getCustomizer()).canExport(entry);
 //			}
 			setEnabled(true);
 		}

 	}

 	/* (non-Javadoc)
 	 * Import action
 	 */
 	private class ImportAction extends PaletteCustomizationAction {
 		private DesignerPaletteCustomizerDialog designerPaletteCustomizerDialog;

 		/**
 		 * Constructor
 		 * @param designerPaletteCustomizerDialog
 		 */
 		public ImportAction(DesignerPaletteCustomizerDialog designerPaletteCustomizerDialog) {
 			super();
 			this.designerPaletteCustomizerDialog = designerPaletteCustomizerDialog;
 			setEnabled(true);
 			setText(PageDesignerResources.getInstance().getString(
 					"DesignerPaletteCustomizerDialog.label.import")); //$NON-NLS-1$
 			setImageDescriptor(PluginImageHelper.getInstance()
 					.getImageDescriptor(DesignerPaletteImages.IMG_ELCL_IMPORT,
 							PDPlugin.getPluginId()));
 			setDisabledImageDescriptor(PluginImageHelper.getInstance()
 					.getImageDescriptor(DesignerPaletteImages.IMG_DLCL_IMPORT,
 							PDPlugin.getPluginId()));
 			setHoverImageDescriptor(PluginImageHelper.getInstance()
 					.getImageDescriptor(DesignerPaletteImages.IMG_CLCL_IMPORT,
 							PDPlugin.getPluginId()));

 		}

 		private void handleImport() {
 //			PaletteEntry entry = designerPaletteCustomizerDialog.getSelectedPaletteEntry();
 			final FileDialog fileDialog = new FileDialog(PDPlugin
 					.getActiveWorkbenchShell());
 			fileDialog.setFileName(DEFAULT_CUSTOMIZATIONS_EXPORT_FILENAME);
 			String[] filterExtensions = new String[2];
 			filterExtensions[0] = "*.xml"; //$NON-NLS-1$
 			filterExtensions[1] = "*.*"; //$NON-NLS-1$
 			fileDialog.setFilterExtensions(filterExtensions);
 			fileDialog.setText(Messages.DesignerPaletteCustomizerDialog_ImportCustomizations);
 			String filename = fileDialog.open();
 			if (filename != null) {
 					//deselect current entry first
 					designerPaletteCustomizerDialog.close();

 //					getCustomizer().revertToSaved();
 					DesignerPaletteCustomizationsHelper
 						.importCustomizations((DesignerPaletteCustomizer)getCustomizer(), filename);

 //					designerPaletteCustomizerDialog.setActiveEntry(entry);
 					((DesignerPaletteCustomizer)getCustomizer()).getDesignerPaletteRoot().refresh();
 					designerPaletteCustomizerDialog.open();
 //					designerPaletteCustomizerDialog.setActiveEntry(entry);
 			}
 		}

 		public void run() {
 			handleImport();
 		}

 		/*
 		 * (non-Javadoc)
 		 *
 		 * @see org.eclipse.gef.ui.palette.customize.PaletteCustomizationAction#update()
 		 */
 		public void update() {
 			//nothing to do
 		}
 	}

 	/**
 	 * @return import action
 	 */
 	public Action getImportAction() {
 		return new ImportAction(this);
 	}

 	/**
 	 * @return export action
 	 */
 	public Action getExportAction() {
 		return new ExportAction();
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.gef.ui.palette.customize.PaletteCustomizerDialog#createOutlineActions()
 	 */
 	protected List createOutlineActions() {
 		List actions = super.createOutlineActions();
 		actions.remove(0);// remove new action
 		actions.remove(0);// remove delete action
 		actions.add(new ImportAction(this));
 		actions.add(new ExportAction());

 		return actions;
 	}

 	@Override
 	protected TreeViewer createOutlineTreeViewer(Composite composite) {
 		TreeViewer viewer = super.createOutlineTreeViewer(composite);
 		viewer.setContentProvider(new DesignerPaletteContentProvider());
 		return viewer;
 	}


 	/**
 	 * Content provider for dialog.
 	 * Displays only {@link TaglibPaletteDrawer}s
 	 */
 	private static class DesignerPaletteContentProvider implements ITreeContentProvider {

 		public Object[] getChildren(Object parentElement) {
 			if (parentElement instanceof DesignerPaletteRoot){
 				List libs = new ArrayList();
 				List children = ((DesignerPaletteRoot)parentElement).getChildren();
 				if (!children.isEmpty()) {
 					for (Iterator it=children.iterator();it.hasNext();){
 						PaletteEntry entry = (PaletteEntry)it.next();
 						if (entry instanceof TaglibPaletteDrawer)
 							libs.add(entry);
 					}
 					if (!libs.isEmpty())
 						return libs.toArray();
 				}
 			}
 			return null;
 		}

 		/* (non-Javadoc)
 		 * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
 		 */
 		public Object getParent(Object element) {
 			return ((PaletteEntry)element).getParent();
 		}

 		/* (non-Javadoc)
 		 * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
 		 */
 		public boolean hasChildren(Object element) {
 			return false;
 		}

 		/* (non-Javadoc)
 		 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
 		 */
 		public Object[] getElements(Object inputElement) {
 			Object[] elements = new Object[0];
 			if (inputElement instanceof DesignerPaletteRoot){
 				elements = getChildren(inputElement);
 				if (elements == null) {
 					elements = new Object[0];
 				}
 			}
 			return elements;
 		}

 		/* (non-Javadoc)
 		 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
 		 */
 		public void dispose() {
 			//nothing to do
 		}

 		/* (non-Javadoc)
 		 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
 		 */
 		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 			//won't change
 		}


 	}
 }
	/*******************************************************************************
	* Copyright (c) 2006 Sybase, Inc. and others.
	*
	* 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:
	* Sybase, Inc. - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jst.pagedesigner.editors.palette;

	import java.beans.PropertyChangeEvent;
	import java.beans.PropertyChangeListener;
	import java.util.ArrayList;
	import java.util.Iterator;
	import java.util.List;

	import org.eclipse.gef.palette.PaletteEntry;
	import org.eclipse.gef.ui.palette.PaletteCustomizer;
	import org.eclipse.gef.ui.palette.customize.PaletteCustomizationAction;
	import org.eclipse.gef.ui.palette.customize.PaletteCustomizerDialog;
	import org.eclipse.jface.action.Action;
	import org.eclipse.jface.viewers.ITreeContentProvider;
	import org.eclipse.jface.viewers.TreeViewer;
	import org.eclipse.jface.viewers.Viewer;
	import org.eclipse.jst.jsf.common.ui.internal.utils.PluginImageHelper;
	import org.eclipse.jst.pagedesigner.PDPlugin;
	import org.eclipse.jst.pagedesigner.editors.pagedesigner.PageDesignerResources;
	import org.eclipse.jst.pagedesigner.editors.palette.impl.PaletteItemManager;
	import org.eclipse.jst.pagedesigner.editors.palette.impl.TaglibPaletteDrawer;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.FileDialog;
	import org.eclipse.swt.widgets.Shell;

	/**
	* Customization dialog for Web Page Designer palette items
	* @author mengbo
	* @version 1.5
	*/
	public class DesignerPaletteCustomizerDialog extends PaletteCustomizerDialog {
	private static final String DEFAULT_CUSTOMIZATIONS_EXPORT_FILENAME = "WPDPaletteCustomizations.xml"; //$NON-NLS-1$

	private static String DEFAULTEXTENSION = ".xml";//$NON-NLS-1$

	/**
	* Constructor
	* @param shell
	* @param customizer
	* @param root
	*/
	public DesignerPaletteCustomizerDialog(Shell shell,
	PaletteCustomizer customizer, DesignerPaletteRoot root) {
	super(shell, customizer, root);

	}

	private PropertyChangeListener applyButtonUpdater = new PropertyChangeListener() {


	public void propertyChange(PropertyChangeEvent evt) {
	Button applyButton = getButton(PaletteCustomizerDialog.APPLY_ID);
	if (applyButton == null) {
	return;
	}
	applyButton.setEnabled(true);
	}
	};

	/* (non-Javadoc)
	* @see org.eclipse.jface.window.Window#open()
	*/
	public int open() {
	// save the current state before open
	// save();
	return super.open();
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.gef.ui.palette.customize.PaletteCustomizerDialog#setActiveEntry(org.eclipse.gef.palette.PaletteEntry)
	*/
	protected void setActiveEntry(PaletteEntry entry) {
	//remove listener on previous entry before adding to new entry
	PaletteEntry pre = getSelectedPaletteEntry();
	if (pre != null) {
	pre.removePropertyChangeListener(applyButtonUpdater);
	} else {
	getButton(APPLY_ID).setEnabled(false);
	}

	if (entry != null)
	entry.addPropertyChangeListener(applyButtonUpdater);

	super.setActiveEntry(entry);
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.gef.ui.palette.customize.PaletteCustomizerDialog#save()
	*/
	protected void save() {
	super.save();
	Button applyButton = getButton(PaletteCustomizerDialog.APPLY_ID);
	if (applyButton != null) {
	applyButton.setEnabled(false);
	}
	}

	/* (non-Javadoc)
	* @see org.eclipse.gef.ui.palette.customize.PaletteCustomizerDialog#createButtonsForButtonBar(org.eclipse.swt.widgets.Composite)
	*/
	protected void createButtonsForButtonBar(Composite parent) {
	super.createButtonsForButtonBar(parent);
	getButton(APPLY_ID).setEnabled(false);
	// save();
	}

	/* (non-Javadoc)
	* Export action
	*
	*/
	private class ExportAction extends PaletteCustomizationAction {

	/**
	* Constructor
	*/
	public ExportAction() {
	setEnabled(true);
	setText(PageDesignerResources.getInstance().getString(
	"DesignerPaletteCustomizerDialog.label.export")); //$NON-NLS-1$
	setImageDescriptor(PluginImageHelper.getInstance()
	.getImageDescriptor(DesignerPaletteImages.IMG_ELCL_EXPORT,
	PDPlugin.getPluginId()));
	setDisabledImageDescriptor(PluginImageHelper.getInstance()
	.getImageDescriptor(DesignerPaletteImages.IMG_DLCL_EXPORT,
	PDPlugin.getPluginId()));
	setHoverImageDescriptor(PluginImageHelper.getInstance()
	.getImageDescriptor(DesignerPaletteImages.IMG_CLCL_EXPORT,
	PDPlugin.getPluginId()));
	}

	private void handleExport() {
	final FileDialog fileDialog = new FileDialog(PDPlugin
	.getActiveWorkbenchShell());
	fileDialog.setFileName(DEFAULT_CUSTOMIZATIONS_EXPORT_FILENAME);
	String[] filterExtensions = new String[2];
	filterExtensions[0] = "*.xml"; //$NON-NLS-1$
	filterExtensions[1] = "."; //$NON-NLS-1$
	fileDialog.setFilterExtensions(filterExtensions);
	fileDialog.setText(Messages.DesignerPaletteCustomizerDialog_ExportCustomizations);
	String filename = fileDialog.open();
	if (filename != null) {
	if (!filename.endsWith(DEFAULTEXTENSION)) {
	filename = filename + DEFAULTEXTENSION;
	}
	final IPaletteContext context = PaletteItemManager.createPaletteContext(((DesignerPaletteRoot)getPaletteRoot()).getFile());
	DesignerPaletteCustomizationsHelper
	.exportCustomizations(PaletteItemManager.getInstance(context), filename);


	updateActions();
	}
	}

	/* (non-Javadoc)
	* @see org.eclipse.jface.action.Action#run()
	*/
	public void run() {
	handleExport();
	}

	/* (non-Javadoc)
	* @see org.eclipse.gef.ui.palette.customize.PaletteCustomizationAction#update()
	*/
	public void update() {
	//boolean enabled = false;
	// PaletteEntry entry = getSelectedPaletteEntry();
	// if (entry != null) {
	// if (getCustomizer() instanceof DesignerPaletteCustomizer)
	// enabled = ((DesignerPaletteCustomizer)
	// getCustomizer()).canExport(entry);
	// }
	setEnabled(true);
	}

	}

	/* (non-Javadoc)
	* Import action
	*/
	private class ImportAction extends PaletteCustomizationAction {
	private DesignerPaletteCustomizerDialog designerPaletteCustomizerDialog;

	/**
	* Constructor
	* @param designerPaletteCustomizerDialog
	*/
	public ImportAction(DesignerPaletteCustomizerDialog designerPaletteCustomizerDialog) {
	super();
	this.designerPaletteCustomizerDialog = designerPaletteCustomizerDialog;
	setEnabled(true);
	setText(PageDesignerResources.getInstance().getString(
	"DesignerPaletteCustomizerDialog.label.import")); //$NON-NLS-1$
	setImageDescriptor(PluginImageHelper.getInstance()
	.getImageDescriptor(DesignerPaletteImages.IMG_ELCL_IMPORT,
	PDPlugin.getPluginId()));
	setDisabledImageDescriptor(PluginImageHelper.getInstance()
	.getImageDescriptor(DesignerPaletteImages.IMG_DLCL_IMPORT,
	PDPlugin.getPluginId()));
	setHoverImageDescriptor(PluginImageHelper.getInstance()
	.getImageDescriptor(DesignerPaletteImages.IMG_CLCL_IMPORT,
	PDPlugin.getPluginId()));

	}

	private void handleImport() {
	// PaletteEntry entry = designerPaletteCustomizerDialog.getSelectedPaletteEntry();
	final FileDialog fileDialog = new FileDialog(PDPlugin
	.getActiveWorkbenchShell());
	fileDialog.setFileName(DEFAULT_CUSTOMIZATIONS_EXPORT_FILENAME);
	String[] filterExtensions = new String[2];
	filterExtensions[0] = "*.xml"; //$NON-NLS-1$
	filterExtensions[1] = "."; //$NON-NLS-1$
	fileDialog.setFilterExtensions(filterExtensions);
	fileDialog.setText(Messages.DesignerPaletteCustomizerDialog_ImportCustomizations);
	String filename = fileDialog.open();
	if (filename != null) {
	//deselect current entry first
	designerPaletteCustomizerDialog.close();

	// getCustomizer().revertToSaved();
	DesignerPaletteCustomizationsHelper
	.importCustomizations((DesignerPaletteCustomizer)getCustomizer(), filename);

	// designerPaletteCustomizerDialog.setActiveEntry(entry);
	((DesignerPaletteCustomizer)getCustomizer()).getDesignerPaletteRoot().refresh();
	designerPaletteCustomizerDialog.open();
	// designerPaletteCustomizerDialog.setActiveEntry(entry);
	}
	}

	public void run() {
	handleImport();
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.gef.ui.palette.customize.PaletteCustomizationAction#update()
	*/
	public void update() {
	//nothing to do
	}
	}

	/**
	* @return import action
	*/
	public Action getImportAction() {
	return new ImportAction(this);
	}

	/**
	* @return export action
	*/
	public Action getExportAction() {
	return new ExportAction();
	}

	/* (non-Javadoc)
	* @see org.eclipse.gef.ui.palette.customize.PaletteCustomizerDialog#createOutlineActions()
	*/
	protected List createOutlineActions() {
	List actions = super.createOutlineActions();
	actions.remove(0);// remove new action
	actions.remove(0);// remove delete action
	actions.add(new ImportAction(this));
	actions.add(new ExportAction());

	return actions;
	}

	@Override
	protected TreeViewer createOutlineTreeViewer(Composite composite) {
	TreeViewer viewer = super.createOutlineTreeViewer(composite);
	viewer.setContentProvider(new DesignerPaletteContentProvider());
	return viewer;
	}


	/**
	* Content provider for dialog.
	* Displays only {@link TaglibPaletteDrawer}s
	*/
	private static class DesignerPaletteContentProvider implements ITreeContentProvider {

	public Object[] getChildren(Object parentElement) {
	if (parentElement instanceof DesignerPaletteRoot){
	List libs = new ArrayList();
	List children = ((DesignerPaletteRoot)parentElement).getChildren();
	if (!children.isEmpty()) {
	for (Iterator it=children.iterator();it.hasNext();){
	PaletteEntry entry = (PaletteEntry)it.next();
	if (entry instanceof TaglibPaletteDrawer)
	libs.add(entry);
	}
	if (!libs.isEmpty())
	return libs.toArray();
	}
	}
	return null;
	}

	/* (non-Javadoc)
	* @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
	*/
	public Object getParent(Object element) {
	return ((PaletteEntry)element).getParent();
	}

	/* (non-Javadoc)
	* @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
	*/
	public boolean hasChildren(Object element) {
	return false;
	}

	/* (non-Javadoc)
	* @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
	*/
	public Object[] getElements(Object inputElement) {
	Object[] elements = new Object[0];
	if (inputElement instanceof DesignerPaletteRoot){
	elements = getChildren(inputElement);
	if (elements == null) {
	elements = new Object[0];
	}
	}
	return elements;
	}

	/* (non-Javadoc)
	* @see org.eclipse.jface.viewers.IContentProvider#dispose()
	*/
	public void dispose() {
	//nothing to do
	}

	/* (non-Javadoc)
	* @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
	*/
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
	//won't change
	}


	}
	}