| /****************************************************************************** |
| * Copyright (c) 2002, 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.editpolicies; |
| |
| import java.util.Iterator; |
| |
| import org.eclipse.draw2d.IFigure; |
| import org.eclipse.draw2d.geometry.Dimension; |
| import org.eclipse.draw2d.geometry.PrecisionRectangle; |
| import org.eclipse.gef.EditPart; |
| import org.eclipse.gef.Handle; |
| import org.eclipse.gef.Request; |
| import org.eclipse.gef.editpolicies.ResizableEditPolicy; |
| import org.eclipse.gef.handles.AbstractHandle; |
| import org.eclipse.gef.requests.ChangeBoundsRequest; |
| import org.eclipse.gef.tools.DragEditPartsTracker; |
| import org.eclipse.gmf.runtime.diagram.ui.requests.RequestConstants; |
| import org.eclipse.gmf.runtime.diagram.ui.tools.DragEditPartsTrackerEx; |
| import org.eclipse.gmf.runtime.draw2d.ui.mapmode.IMapMode; |
| import org.eclipse.gmf.runtime.draw2d.ui.mapmode.MapModeUtil; |
| |
| /** |
| * A resizable edit policy that understands REQ_DRAG and REQ_DROP requests |
| * |
| * @author melaasar |
| */ |
| public class ResizableEditPolicyEx extends ResizableEditPolicy { |
| |
| /** |
| * @see org.eclipse.gef.EditPolicy#eraseSourceFeedback(org.eclipse.gef.Request) |
| */ |
| public void eraseSourceFeedback(Request request) { |
| if (RequestConstants.REQ_DROP.equals(request.getType())) |
| eraseChangeBoundsFeedback((ChangeBoundsRequest) request); |
| else |
| super.eraseSourceFeedback(request); |
| } |
| |
| /** |
| * @see org.eclipse.gef.EditPolicy#showSourceFeedback(org.eclipse.gef.Request) |
| */ |
| public void showSourceFeedback(Request request) { |
| if (RequestConstants.REQ_DROP.equals(request.getType())) |
| showChangeBoundsFeedback((ChangeBoundsRequest) request); |
| else |
| super.showSourceFeedback(request); |
| } |
| |
| /** |
| * @see org.eclipse.gef.editpolicies.SelectionHandlesEditPolicy#addSelectionHandles() |
| */ |
| protected void addSelectionHandles() { |
| super.addSelectionHandles(); |
| Iterator iter = handles.iterator(); |
| while (iter.hasNext()) { |
| Handle handle = (Handle) iter.next(); |
| if (handle.getDragTracker().getClass() == DragEditPartsTracker.class) |
| replaceHandleDragEditPartsTracker(handle); |
| } |
| } |
| |
| /** |
| * Replaces the handle's default DragEditPartsTracker with the extended |
| * DragEditPartsTrackerEx |
| * @param handle |
| */ |
| protected void replaceHandleDragEditPartsTracker(Handle handle) { |
| if (handle instanceof AbstractHandle) { |
| AbstractHandle h = (AbstractHandle) handle; |
| h.setDragTracker(new DragEditPartsTrackerEx(getHost())); |
| } |
| } |
| |
| /** |
| * @see org.eclipse.gef.EditPolicy#getTargetEditPart(org.eclipse.gef.Request) |
| */ |
| public EditPart getTargetEditPart(Request request) { |
| if (understandsRequest(request)) |
| return getHost(); |
| return super.getTargetEditPart(request); |
| } |
| |
| protected void showChangeBoundsFeedback(ChangeBoundsRequest request) { |
| IFigure feedback = getDragSourceFeedbackFigure(); |
| |
| PrecisionRectangle rect = new PrecisionRectangle(getInitialFeedbackBounds().getCopy()); |
| getHostFigure().translateToAbsolute(rect); |
| rect.translate(request.getMoveDelta()); |
| rect.resize(request.getSizeDelta()); |
| |
| IFigure f = getHostFigure(); |
| Dimension min = f.getMinimumSize().getCopy(); |
| Dimension max = f.getMaximumSize().getCopy(); |
| IMapMode mmode = MapModeUtil.getMapMode(f); |
| min.height = mmode.LPtoDP(min.height); |
| min.width = mmode.LPtoDP(min.width); |
| max.height = mmode.LPtoDP(max.height); |
| max.width = mmode.LPtoDP(max.width); |
| |
| if (min.width>rect.width) |
| rect.width = min.width; |
| else if (max.width < rect.width) |
| rect.width = max.width; |
| |
| if (min.height>rect.height) |
| rect.height = min.height; |
| else if (max.height < rect.height) |
| rect.height = max.height; |
| |
| feedback.translateToRelative(rect); |
| feedback.setBounds(rect); |
| } |
| } |