| /****************************************************************************** |
| * Copyright (c) 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.gmf.runtime.diagram.core.commands; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.eclipse.core.commands.ExecutionException; |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.emf.transaction.TransactionalEditingDomain; |
| import org.eclipse.gmf.runtime.common.core.command.CommandResult; |
| import org.eclipse.gmf.runtime.diagram.core.internal.l10n.DiagramCoreMessages; |
| import org.eclipse.gmf.runtime.diagram.core.util.ViewType; |
| import org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand; |
| import org.eclipse.gmf.runtime.notation.Bounds; |
| import org.eclipse.gmf.runtime.notation.LayoutConstraint; |
| import org.eclipse.gmf.runtime.notation.Location; |
| import org.eclipse.gmf.runtime.notation.Node; |
| import org.eclipse.gmf.runtime.notation.NotationFactory; |
| import org.eclipse.gmf.runtime.notation.View; |
| |
| /** |
| * This command groups node views (i.e. shapes) together. It creates a new group |
| * view and reparents the nodes passed in to be children of the group. The |
| * nodes' locations are also changed to be relative to the location of the |
| * group. |
| * |
| * @author crevells, mmostafa |
| * @since 2.1 |
| */ |
| public class GroupCommand |
| extends AbstractTransactionalCommand { |
| |
| private List nodes; |
| |
| /** |
| * Creates a new instance. |
| * |
| * @param editingDomain |
| * the editing domain |
| * @param nodes |
| * A list of nodes (i.e. shape views) that are to be grouped. The |
| * nodes must all have the same parent. |
| */ |
| public GroupCommand(TransactionalEditingDomain editingDomain, List nodes) { |
| this(editingDomain, nodes, null); |
| } |
| |
| /** |
| * Creates a new instance. |
| * |
| * @param editingDomain |
| * the editing domain |
| * @param nodes |
| * A list of nodes (i.e. shape views) that are to be grouped. The |
| * nodes must all have the same parent. |
| * @param options |
| * for the transaction in which this command executes, or |
| * <code>null</code> for the default options |
| */ |
| public GroupCommand(TransactionalEditingDomain editingDomain, List nodes, |
| Map options) { |
| super(editingDomain, DiagramCoreMessages.GroupCommand_Label, options, |
| getWorkspaceFiles(nodes)); |
| this.nodes = nodes; |
| } |
| |
| /** |
| * Creates the new group, reparents the nodes, and sets the locations of the |
| * group and nodes as appropriate.\ |
| */ |
| protected CommandResult doExecuteWithResult( |
| IProgressMonitor progressMonitor, IAdaptable info) |
| throws ExecutionException { |
| |
| Node group = NotationFactory.eINSTANCE.createNode(); |
| group.setType(ViewType.GROUP); |
| group.setElement(null); |
| |
| View parentView = (View) ((View) getNodes().get(0)).eContainer(); |
| parentView.getPersistedChildren().add(group); |
| |
| int x = 0; |
| int y = 0; |
| boolean first = true; |
| for (Iterator iter = getNodes().iterator(); iter.hasNext();) { |
| Object view = iter.next(); |
| if (view instanceof Node) { |
| LayoutConstraint layoutConstraint = ((Node) view) |
| .getLayoutConstraint(); |
| if (layoutConstraint instanceof Location) { |
| Location location = (Location) layoutConstraint; |
| if (first) { |
| x = location.getX(); |
| y = location.getY(); |
| first = false; |
| } else { |
| if (x > location.getX()) |
| x = location.getX(); |
| if (y > location.getY()) |
| y = location.getY(); |
| } |
| } |
| group.insertChild((View) view); |
| } |
| } |
| |
| Bounds groupBounds = NotationFactory.eINSTANCE.createBounds(); |
| groupBounds.setX(x); |
| groupBounds.setY(y); |
| groupBounds.setWidth(-1); |
| groupBounds.setHeight(-1); |
| group.setLayoutConstraint(groupBounds); |
| |
| translateChildrenLocations(x, y); |
| return CommandResult.newOKCommandResult(group); |
| } |
| |
| /** |
| * Translate the location of the children to be relative to the group's |
| * location. |
| * |
| * @param x the group's location x-value |
| * @param y the group's location y-value |
| */ |
| private void translateChildrenLocations(int x, int y) { |
| if (x == 0 && y == 0) |
| return; |
| for (Iterator iter = getNodes().iterator(); iter.hasNext();) { |
| Object view = iter.next(); |
| if (view instanceof Node) { |
| LayoutConstraint layoutConstraint = ((Node) view) |
| .getLayoutConstraint(); |
| if (layoutConstraint instanceof Location) { |
| Location location = (Location) layoutConstraint; |
| location.setX(location.getX() - x); |
| location.setY(location.getY() - y); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Gets the list of nodes to be grouped. |
| * |
| * @return the list of nodes to be grouped |
| */ |
| protected List getNodes() { |
| return nodes; |
| } |
| |
| } |