| // GraphsView.java |
| package org.eclipse.stem.ui.views; |
| |
| /******************************************************************************* |
| * Copyright (c) 2006, 2008 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| import org.eclipse.stem.core.Constants; |
| import org.eclipse.stem.ui.Activator; |
| import org.eclipse.stem.ui.ISharedImages; |
| import org.eclipse.swt.graphics.Image; |
| |
| /** |
| * This class represents the eclipse view of the |
| * {@link org.eclipse.stem.core.graph.Graph}s that have been imported into |
| * eclipse as plug-ins. |
| */ |
| public class GraphsView extends IdentifiablePluginView { |
| |
| /** |
| * The identifier of the Graph View |
| */ |
| public static final String ID_GRAPHS_VIEW = "org.eclipse.stem.ui.views.graphs"; //$NON-NLS-1$ |
| |
| /** |
| * Constructor |
| */ |
| public GraphsView() { |
| super(); |
| } // GraphsView |
| |
| /** |
| * @return the input model specific to this view |
| */ |
| @Override |
| protected IdentifiableViewModel getInput() { |
| return GraphViewModel.getModel(); |
| } // getInput |
| |
| /** |
| * @see org.eclipse.stem.ui.views.IdentifiablePluginView#getIdentifiablePluginViewLabelContentProvider() |
| */ |
| @Override |
| protected IdentifiablePluginViewLabelContentProvider getIdentifiablePluginViewLabelContentProvider() { |
| return new GraphPluginViewLabelContentProvider(); |
| } // getIdentifiablePluginViewLabelContentProvider |
| |
| /** |
| * This class represents a singleton instance of a model of the |
| * {@link Graph}s that are plugged-in to the system. |
| */ |
| protected static class GraphViewModel extends IdentifiableViewModel { |
| // The singleton instance |
| private static GraphViewModel gvModel; |
| |
| /** |
| * Constructor |
| */ |
| private GraphViewModel() { |
| super(Constants.ID_GRAPH_EXTENSION_POINT); |
| } // GraphViewModel |
| |
| /** |
| * @return the single instance of the GraphViewModel |
| */ |
| public static GraphViewModel getModel() { |
| // Do we need to make the model? |
| if (gvModel == null) { |
| // Yes |
| gvModel = new GraphViewModel(); |
| } |
| return gvModel; |
| } // getModel |
| |
| } // GraphViewModel |
| |
| protected static class GraphPluginViewLabelContentProvider extends |
| IdentifiablePluginViewLabelContentProvider { |
| |
| // This is the image used to represent graphs in the graph view |
| static Image graphIcon = null; |
| |
| // If true then we've never tried to get the icon |
| static boolean graphIconFirstTime = true; |
| |
| /** |
| * @see org.eclipse.stem.ui.views.IdentifiablePluginView.IdentifiablePluginViewLabelContentProvider#getImage(java.lang.Object) |
| */ |
| @Override |
| public Image getImage(final Object element) { |
| return (element instanceof IdentifiableDelegate) ? getGraphIcon() |
| : super.getImage(element); |
| } // getImage |
| |
| /** |
| * @return the icon to be used to represent graphs, or null if it can't |
| * be loaded. |
| */ |
| private Image getGraphIcon() { |
| // Should we try to load the icon? |
| if (graphIconFirstTime && graphIcon == null) { |
| // Yes |
| graphIconFirstTime = false; |
| graphIcon = Activator.getDefault().getImageRegistry().get( |
| ISharedImages.GRAPH_ICON); |
| } // if we should load the icon |
| return graphIcon; |
| } // getGraphIcon |
| |
| } // GraphPluginViewLabelContentProvider |
| } // GraphsView |