| /******************************************************************************* |
| * Copyright (c) 2001, 2007 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.wst.xsd.ui.internal.design.editpolicies; |
| |
| import java.util.List; |
| |
| import org.eclipse.draw2d.FigureCanvas; |
| import org.eclipse.draw2d.geometry.Point; |
| import org.eclipse.gef.EditPartViewer; |
| import org.eclipse.gef.GraphicalEditPart; |
| import org.eclipse.gef.Request; |
| import org.eclipse.gef.requests.ChangeBoundsRequest; |
| import org.eclipse.wst.xsd.ui.internal.adapters.XSDBaseAttributeAdapter; |
| import org.eclipse.wst.xsd.ui.internal.adapters.XSDElementDeclarationAdapter; |
| import org.eclipse.wst.xsd.ui.internal.commands.BaseDragAndDropCommand; |
| import org.eclipse.wst.xsd.ui.internal.commands.XSDAttributeDragAndDropCommand; |
| import org.eclipse.wst.xsd.ui.internal.commands.XSDElementDragAndDropCommand; |
| import org.eclipse.wst.xsd.ui.internal.design.editparts.XSDBaseFieldEditPart; |
| |
| |
| public class DragAndDropEditPolicy extends org.eclipse.gef.editpolicies.GraphicalEditPolicy |
| { |
| protected EditPartViewer viewer; |
| protected SelectionHandlesEditPolicyImpl selectionHandlesEditPolicy; |
| |
| public DragAndDropEditPolicy(EditPartViewer viewer, SelectionHandlesEditPolicyImpl selectionHandlesEditPolicy) |
| { |
| this.viewer = viewer; |
| this.selectionHandlesEditPolicy = selectionHandlesEditPolicy; |
| } |
| |
| public boolean understandsRequest(Request req) |
| { |
| return true; |
| } |
| |
| |
| public org.eclipse.gef.commands.Command getCommand(Request request) |
| { |
| BaseDragAndDropCommand command = null; |
| if (request instanceof ChangeBoundsRequest) |
| { |
| ChangeBoundsRequest changeBoundsRequest = (ChangeBoundsRequest)request; |
| Point location = changeBoundsRequest.getLocation(); |
| |
| GraphicalEditPart target = (GraphicalEditPart)viewer.findObjectAt(location); |
| location = getPointerLocation(changeBoundsRequest.getLocation()); |
| ((GraphicalEditPart)viewer.getRootEditPart()).getFigure().translateToRelative(location); |
| |
| List list = changeBoundsRequest.getEditParts(); |
| // allow drag and drop of only one selected object |
| if (list.size() == 1) |
| { |
| Object itemToDrag = list.get(0); |
| if (itemToDrag instanceof XSDBaseFieldEditPart) |
| { |
| XSDBaseFieldEditPart selected = (XSDBaseFieldEditPart) itemToDrag; |
| if (selected.getModel() instanceof XSDElementDeclarationAdapter) |
| { |
| command = new XSDElementDragAndDropCommand(viewer, (ChangeBoundsRequest)request, target, selected, location); |
| selectionHandlesEditPolicy.setDragAndDropCommand(command); |
| } |
| else if (selected.getModel() instanceof XSDBaseAttributeAdapter) |
| { |
| command = new XSDAttributeDragAndDropCommand(viewer, (ChangeBoundsRequest)request, target, selected, location); |
| selectionHandlesEditPolicy.setDragAndDropCommand(command); |
| } |
| } |
| } |
| } |
| return command; |
| } |
| |
| protected Point getPointerLocation(Point origPointerLocation) |
| { |
| Point compensatedLocation = origPointerLocation; |
| FigureCanvas figureCanvas = (FigureCanvas) viewer.getControl(); |
| int yOffset = figureCanvas.getViewport().getVerticalRangeModel().getValue(); |
| int xOffset = figureCanvas.getViewport().getHorizontalRangeModel().getValue(); |
| compensatedLocation.y = compensatedLocation.y + yOffset; |
| compensatedLocation.x = compensatedLocation.x + xOffset; |
| return compensatedLocation; |
| } |
| } |