| /******************************************************************************* |
| * Copyright (c) 2006 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 |
| *******************************************************************************/ |
| package org.eclipse.ui.examples.views.properties.tabbed.logic.properties; |
| |
| import java.util.Iterator; |
| |
| import org.eclipse.gef.EditPart; |
| import org.eclipse.gef.examples.logicdesigner.model.Circuit; |
| import org.eclipse.gef.examples.logicdesigner.model.LogicElement; |
| import org.eclipse.gef.examples.logicdesigner.model.LogicSubpart; |
| import org.eclipse.gef.examples.logicdesigner.model.Wire; |
| import org.eclipse.jface.resource.ImageDescriptor; |
| import org.eclipse.jface.util.Assert; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.LabelProvider; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.ui.views.properties.tabbed.ITypeMapper; |
| |
| /** |
| * Label provider for the title bar for the tabbed property sheet page. |
| * |
| * @author Anthony Hunter |
| */ |
| public class LogicElementLabelProvider |
| extends LabelProvider { |
| |
| private ITypeMapper typeMapper; |
| |
| /** |
| * constructor. |
| */ |
| public LogicElementLabelProvider() { |
| super(); |
| typeMapper = new LogicElementTypeMapper(); |
| } |
| |
| /** |
| * @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object) |
| */ |
| public Image getImage(Object objects) { |
| if (objects == null || objects.equals(StructuredSelection.EMPTY)) { |
| return null; |
| } |
| final boolean multiple[] = {false}; |
| Object object = getObject(objects, multiple); |
| if (object == null) { |
| ImageDescriptor imageDescriptor = ImageDescriptor.createFromFile( |
| Circuit.class, "icons/comp.gif");//$NON-NLS-1$ |
| return imageDescriptor.createImage(); |
| } else { |
| if (!(object instanceof EditPart)) { |
| return null; |
| } |
| LogicElement element = (LogicElement) ((EditPart) object) |
| .getModel(); |
| if (element instanceof Wire) { |
| ImageDescriptor imageDescriptor = ImageDescriptor |
| .createFromFile(Circuit.class, "icons/connection16.gif");//$NON-NLS-1$ |
| return imageDescriptor.createImage(); |
| } |
| return ((LogicSubpart) element).getIconImage(); |
| } |
| } |
| |
| /** |
| * @see org.eclipse.jface.viewers.ILabelProvider#getText(java.lang.Object) |
| */ |
| public String getText(Object objects) { |
| if (objects == null || objects.equals(StructuredSelection.EMPTY)) { |
| return "No items selected";//$NON-NLS-1$ |
| } |
| final boolean multiple[] = {false}; |
| final Object object = getObject(objects, multiple); |
| if (object == null || ((IStructuredSelection) objects).size() > 1) { |
| return ((IStructuredSelection) objects).size() + " items selected";//$NON-NLS-1$ |
| } else { |
| String name = typeMapper.mapType(object).getName(); |
| return name.substring(name.lastIndexOf('.') + 1); |
| } |
| } |
| |
| /** |
| * Determine if a multiple object selection has been passed to the label |
| * provider. If the objects is a IStructuredSelection, see if all the |
| * objects in the selection are the same and if so, we want to provide |
| * labels for the common selected element. |
| * |
| * @param objects |
| * a single object or a IStructuredSelection. |
| * @param multiple |
| * first element in the array is true if there is multiple |
| * unequal selected elements in a IStructuredSelection. |
| * @return the object to get labels for. |
| */ |
| private Object getObject(Object objects, boolean multiple[]) { |
| Assert.isNotNull(objects); |
| Object object = null; |
| if (objects instanceof IStructuredSelection) { |
| IStructuredSelection selection = (IStructuredSelection) objects; |
| object = selection.getFirstElement(); |
| if (selection.size() == 1) { |
| // one element selected |
| multiple[0] = false; |
| return object; |
| } |
| // multiple elements selected |
| multiple[0] = true; |
| Class firstClass = typeMapper.mapType(object); |
| // determine if all the objects in the selection are the same type |
| if (selection.size() > 1) { |
| for (Iterator i = selection.iterator(); i.hasNext();) { |
| Object next = i.next(); |
| Class nextClass = typeMapper.mapType(next); |
| if (!nextClass.equals(firstClass)) { |
| // two elements not equal == multiple selected unequal |
| multiple[0] = false; |
| object = null; |
| break; |
| } |
| } |
| } |
| } else { |
| multiple[0] = false; |
| object = objects; |
| } |
| return object; |
| } |
| |
| } |