| /****************************************************************************** |
| * Copyright (c) 2003, 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.gmf.runtime.diagram.ui.dnd.parts; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.eclipse.gef.dnd.DelegatingDropAdapter; |
| import org.eclipse.jface.util.Assert; |
| import org.eclipse.swt.dnd.DropTargetEvent; |
| import org.eclipse.swt.dnd.Transfer; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.ui.IWorkbenchPart; |
| |
| import org.eclipse.gmf.runtime.common.ui.services.dnd.drop.DelegatingDropTargetAdapter; |
| import org.eclipse.gmf.runtime.common.ui.services.dnd.drop.DropTargetContext; |
| import org.eclipse.gmf.runtime.common.ui.services.dnd.drop.IDropTargetContext; |
| import org.eclipse.gmf.runtime.diagram.ui.parts.IDiagramWorkbenchPart; |
| |
| /** |
| * This class extends the GEF drop target adapter. It delgates all the drop |
| * events to the |
| * <code>org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.DelegatingDropTargetAdapter</code> |
| * If there are no drop target listeners registered with the common |
| * infrastructure, then the drop events are delegated to the parent adpater |
| * |
| * @author Vishy Ramaswamy |
| * @see org.eclipse.gmf.runtime.common.ui.services.dnd.drop.DelegatingDropTargetAdapter |
| */ |
| public class DiagramViewerDropAdapter |
| extends DelegatingDropAdapter { |
| |
| /** |
| * Inner class that extends the drop target context to provide graphical |
| * viewer specific behaviour |
| * |
| * @author Vishy Ramaswamy |
| */ |
| private final class DiagramViewerDropTargetContext |
| extends DropTargetContext { |
| |
| /** |
| * Constructor for DiagramViewerDropTargetContext |
| * |
| * @param activePart |
| * @param viewerControl |
| */ |
| public DiagramViewerDropTargetContext(IWorkbenchPart activePart, |
| Control viewerControl) { |
| super(activePart, viewerControl); |
| } |
| |
| /* |
| * @see org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.DropTargetContext#dragEnter(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| protected void dragEnter(DropTargetEvent event) { |
| DiagramViewerDropAdapter.super.dragEnter(event); |
| } |
| |
| /* |
| * @see org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.DropTargetContext#dragLeave(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| protected void dragLeave(DropTargetEvent event) { |
| DiagramViewerDropAdapter.super.dragLeave(event); |
| } |
| |
| /* |
| * @see org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.DropTargetContext#dragOperationChanged(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| protected void dragOperationChanged(DropTargetEvent event) { |
| DiagramViewerDropAdapter.super.dragOperationChanged(event); |
| } |
| |
| /* |
| * @see org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.DropTargetContext#dragOver(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| protected void dragOver(DropTargetEvent event) { |
| DiagramViewerDropAdapter.super.dragOver(event); |
| } |
| |
| /* |
| * @see org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.DropTargetContext#drop(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| protected void drop(DropTargetEvent event) { |
| DiagramViewerDropAdapter.super.drop(event); |
| } |
| |
| /* |
| * @see org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.DropTargetContext#dropAccept(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| protected void dropAccept(DropTargetEvent event) { |
| DiagramViewerDropAdapter.super.dropAccept(event); |
| } |
| |
| /* |
| * @see org.eclipse.gmf.runtime.common.ui.internal.dnd.drop.DropTargetContext#setCurrentTargetAndLocation(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| protected void setCurrentTargetAndLocation(DropTargetEvent event) { |
| /* Set the location */ |
| location = getViewerControl() |
| .toControl(new Point(event.x, event.y)); |
| |
| /* Set the target */ |
| org.eclipse.draw2d.geometry.Point gefPoint = new org.eclipse.draw2d.geometry.Point( |
| location.x, location.y); |
| |
| target = DiagramViewerDropAdapter.this.getWorkbenchPart() |
| .getDiagramGraphicalViewer().findObjectAt(gefPoint); |
| |
| /* Set the relative location */ |
| relativeLocation = IDropTargetContext.LOCATION_NONE; |
| } |
| } |
| |
| /** |
| * Attribute for the diagram workbench part. |
| */ |
| private final IDiagramWorkbenchPart workbenchPart; |
| |
| /** |
| * Attribute for the delegating drop target adapter |
| */ |
| private DelegatingDropTargetAdapter internalDropAdapter; |
| |
| /** |
| * Constructor |
| * |
| * @param workbenchPart |
| * the diagram workbench part |
| */ |
| public DiagramViewerDropAdapter(IDiagramWorkbenchPart workbenchPart) { |
| Assert.isNotNull(workbenchPart); |
| |
| /* Set the part */ |
| this.workbenchPart = workbenchPart; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.util.DelegatingDropAdapter#getTransfers() |
| */ |
| public Transfer[] getTransfers() { |
| if (getInternalDropAdapter() == null) { |
| return super.getTransfers(); |
| } |
| |
| /* Get all the transfers */ |
| Transfer[] allTransferAgents = getInternalDropAdapter() |
| .getAllTransferAgents(); |
| Transfer[] superTransferTypes = super.getTransfers(); |
| |
| /* Combine the transfers */ |
| List myTransfers = null; |
| List superTransfers = null; |
| |
| if (allTransferAgents != null) |
| myTransfers = Arrays.asList(allTransferAgents); |
| |
| if (superTransferTypes != null) |
| superTransfers = Arrays.asList(superTransferTypes); |
| |
| ArrayList allTransfers = new ArrayList(); |
| if (superTransfers != null) |
| allTransfers.addAll(superTransfers); |
| if (myTransfers != null) |
| allTransfers.addAll(myTransfers); |
| |
| Transfer[] arrTransfers = new Transfer[allTransfers.size()]; |
| arrTransfers = (Transfer[]) allTransfers.toArray(arrTransfers); |
| return arrTransfers; |
| } |
| |
| /** |
| * Return the delegating drop adapter |
| * |
| * @return DelegatingDropTargetAdapter |
| */ |
| private DelegatingDropTargetAdapter getInternalDropAdapter() { |
| return internalDropAdapter; |
| } |
| |
| /** |
| * Initializes the delegating drop adapter |
| * |
| * @param control |
| * the viewer's control |
| */ |
| protected final void initialize(Control control) { |
| if (this.internalDropAdapter == null) { |
| Assert.isNotNull(control); |
| /* Create the drop adapter */ |
| DiagramViewerDropTargetContext context = new DiagramViewerDropTargetContext( |
| getWorkbenchPart(), control); |
| this.internalDropAdapter = new DelegatingDropTargetAdapter(context); |
| } |
| } |
| |
| /* |
| * @see org.eclipse.swt.dnd.DropTargetListener#dragEnter(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| public void dragEnter(DropTargetEvent event) { |
| getInternalDropAdapter().dragEnter(event); |
| } |
| |
| /* |
| * @see org.eclipse.swt.dnd.DropTargetListener#dragLeave(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| public void dragLeave(DropTargetEvent event) { |
| getInternalDropAdapter().dragLeave(event); |
| } |
| |
| /* |
| * @see org.eclipse.swt.dnd.DropTargetListener#dragOperationChanged(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| public void dragOperationChanged(DropTargetEvent event) { |
| getInternalDropAdapter().dragOperationChanged(event); |
| } |
| |
| /* |
| * @see org.eclipse.swt.dnd.DropTargetListener#dragOver(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| public void dragOver(DropTargetEvent event) { |
| getInternalDropAdapter().dragOver(event); |
| } |
| |
| /* |
| * @see org.eclipse.swt.dnd.DropTargetListener#drop(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| public void drop(DropTargetEvent event) { |
| getInternalDropAdapter().drop(event); |
| } |
| |
| /* |
| * @see org.eclipse.swt.dnd.DropTargetListener#dropAccept(org.eclipse.swt.dnd.DropTargetEvent) |
| */ |
| public void dropAccept(DropTargetEvent event) { |
| getInternalDropAdapter().dropAccept(event); |
| } |
| |
| /** |
| * Returns the diagram workbenchPart. |
| * |
| * @return the workbenchPart. |
| */ |
| private IDiagramWorkbenchPart getWorkbenchPart() { |
| return this.workbenchPart; |
| } |
| |
| /* |
| * @see org.eclipse.jface.util.DelegatingDropAdapter#isEmpty() |
| */ |
| public boolean isEmpty() { |
| Transfer[] transfers = getTransfers(); |
| if (transfers != null && transfers.length > 0) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Returns the isInitialized. |
| * |
| * @return the isInitialized. |
| */ |
| protected final boolean isInitialized() { |
| return getInternalDropAdapter() != null; |
| } |
| } |