| /* |
| * Copyright (c) 2012 Eike Stepper (Berlin, Germany) 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: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.emf.cdo.transfer.ui; |
| |
| import org.eclipse.emf.cdo.transfer.CDOTransfer; |
| import org.eclipse.emf.cdo.transfer.CDOTransferMapping; |
| |
| import org.eclipse.net4j.util.event.IEvent; |
| import org.eclipse.net4j.util.event.IListener; |
| import org.eclipse.net4j.util.ui.UIUtil; |
| |
| import org.eclipse.jface.viewers.ITreeContentProvider; |
| import org.eclipse.jface.viewers.StructuredViewer; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.jface.viewers.Viewer; |
| |
| /** |
| * A reusable {@link ITreeContentProvider tree content provider} for the {@link CDOTransferMapping mappings} of a {@link CDOTransfer transfer}. |
| * <p> |
| * The {@link StructuredViewer#setInput(Object) input} must be an instance of {@link CDOTransferMapping}, e.g., the return value of {@link CDOTransfer#getRootMapping()}. |
| * |
| * @author Eike Stepper |
| * @since 4.2 |
| */ |
| public class TransferContentProvider implements ITreeContentProvider, IListener |
| { |
| private TreeViewer viewer; |
| |
| private CDOTransferMapping input; |
| |
| public TransferContentProvider() |
| { |
| } |
| |
| public void notifyEvent(IEvent event) |
| { |
| if (viewer == null) |
| { |
| return; |
| } |
| |
| if (event instanceof CDOTransfer.MappingEvent) |
| { |
| CDOTransfer.MappingEvent e = (CDOTransfer.MappingEvent)event; |
| CDOTransferMapping mapping = e.getMapping(); |
| |
| if (e.hasTreeImpact()) |
| { |
| UIUtil.refreshElement(viewer, mapping, true); |
| } |
| else |
| { |
| UIUtil.refreshElement(viewer, mapping, true); // TODO Just update labels |
| } |
| } |
| } |
| |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) |
| { |
| this.viewer = (TreeViewer)viewer; |
| |
| // boolean refreshViewer = false; |
| if (input != null) |
| { |
| input.getTransfer().removeListener(this); |
| // refreshViewer = true; |
| } |
| |
| if (newInput instanceof CDOTransferMapping) |
| { |
| input = (CDOTransferMapping)newInput; |
| input.getTransfer().addListener(this); |
| } |
| else |
| { |
| if (newInput == null) |
| { |
| input = null; |
| } |
| else |
| { |
| throw new IllegalArgumentException("Not a transfer mapping: " + newInput); |
| } |
| } |
| } |
| |
| public void dispose() |
| { |
| if (input != null) |
| { |
| input.getTransfer().removeListener(this); |
| input = null; |
| } |
| } |
| |
| public boolean hasChildren(Object element) |
| { |
| return getChildren(element).length != 0; |
| } |
| |
| public Object[] getChildren(Object element) |
| { |
| if (element instanceof CDOTransferMapping) |
| { |
| CDOTransferMapping mapping = (CDOTransferMapping)element; |
| return mapping.getChildren(); |
| } |
| |
| return CDOTransferMapping.NO_CHILDREN; |
| } |
| |
| public Object[] getElements(Object element) |
| { |
| return getChildren(element); |
| } |
| |
| public Object getParent(Object element) |
| { |
| if (element == input) |
| { |
| return null; |
| } |
| |
| if (element instanceof CDOTransferMapping) |
| { |
| CDOTransferMapping mapping = (CDOTransferMapping)element; |
| return mapping.getParent(); |
| } |
| |
| return null; |
| } |
| } |