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<  * @(#)GroupCommand.java 5.2
---
>  * @(#)GroupCommand.java
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>  * Project:		JHotdraw - a GUI framework for technical drawings
>  *				http://www.jhotdraw.org
>  *				http://jhotdraw.sourceforge.net
>  * Copyright:	© by the original author(s) and all contributors
>  * License:		Lesser GNU Public License (LGPL)
>  *				http://www.opensource.org/licenses/lgpl-license.html
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< import java.util.*;
< import CH.ifa.draw.util.Command;
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> import CH.ifa.draw.util.UndoableAdapter;
> import CH.ifa.draw.util.Undoable;
> import java.util.*;
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>  *
>  * @version <$CURRENT_VERSION$>
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< public  class GroupCommand extends Command {
< 
<     private DrawingView fView;
---
> public  class GroupCommand extends AbstractCommand {
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<         super(name);
<         fView = view;
---
>         super(name, view);
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<         Vector selected = fView.selectionZOrdered();
<         Drawing drawing = fView.drawing();
<         if (selected.size() > 0) {
<             fView.clearSelection();
<             drawing.orphanAll(selected);
---
>     	setUndoActivity(createUndoActivity());
>         getUndoActivity().setAffectedFigures(view().selectionElements());
> 		((GroupCommand.UndoActivity)getUndoActivity()).groupFigures();
> 		view().checkDamage();
>     }
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<             GroupFigure group = new GroupFigure();
<             group.addAll(selected);
<             fView.addToSelection(drawing.add(group));
---
>     public boolean isExecutable() {
>         return view().selectionCount() > 1;
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<         fView.checkDamage();
---
> 
> 	/**
> 	 * Factory method for undo activity
> 	 */
> 	protected Undoable createUndoActivity() {
> 		return new GroupCommand.UndoActivity(view());
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<     public boolean isExecutable() {
<         return fView.selectionCount() > 0;
---
> 	public static class UndoActivity extends UndoableAdapter {
> 		public UndoActivity(DrawingView newDrawingView) {
> 			super(newDrawingView);
> 			setUndoable(true);
> 			setRedoable(true);
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> 		public boolean undo() {
> 			if (!super.undo()) {
> 				return false;
> 			}
> 			
> 			getDrawingView().clearSelection();
> 	
> 			// duplicate before we orphan affected figures
> //			FigureEnumeration fe = StandardFigureSelection.duplicateFigures(
> //				getAffectedFigures(), getAffectedFiguresCount());
> 	
> 			// orphan group figure(s)
> //			getDrawingView().drawing().removeAll(getAffectedFigures());
> 			getDrawingView().drawing().orphanAll(getAffectedFigures());
> 								
> 	        // create a new vector with the grouped figures as elements
> 	        Vector affectedFigures = new Vector();
> 
> 			FigureEnumeration fe =getAffectedFigures();
> 			while (fe.hasMoreElements()) {
> 				Figure currentFigure = fe.nextFigure();
> 				// add contained figures			
> 				getDrawingView().drawing().addAll(currentFigure.figures());
> 				getDrawingView().addToSelectionAll(currentFigure.figures());
> 	
> 				FigureEnumeration groupedFigures = currentFigure.figures();
> 				while (groupedFigures.hasMoreElements()) {
> 	            	affectedFigures.addElement(groupedFigures.nextFigure());
> 				}
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> 	    	setAffectedFigures(new FigureEnumerator(affectedFigures));
> 	
> 		    return true;
> 		}
> 	
> 		public boolean redo() {
> 			// do not call execute directly as the selection might has changed
> 			if (isRedoable()) {
> 				groupFigures();
> 				return true;
> 			}
> 			
> 			return false;
> 		}
> 
> 		public void groupFigures() {
> 		    getDrawingView().drawing().orphanAll(getAffectedFigures());
> 	        getDrawingView().clearSelection();
> 	
> 			// add new group figure instead
> 	        GroupFigure group = new GroupFigure();
> 	        group.addAll(getAffectedFigures());
> 	
> 	        Figure figure = getDrawingView().drawing().add(group);
> 	        getDrawingView().addToSelection(figure);
> 	        
> 	        // create a new vector with the new group figure as element
> 	        Vector affectedFigures = new Vector();
> 	        affectedFigures.addElement(figure);
> 			setAffectedFigures(new FigureEnumerator(affectedFigures));
> 		}
> 	}
> }