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<  * @(#)RadiusHandle.java 5.2
---
>  * @(#)RadiusHandle.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.awt.*;
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> import CH.ifa.draw.util.Undoable;
> import CH.ifa.draw.util.UndoableAdapter;
> import java.awt.*;
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>  *
>  * @version <$CURRENT_VERSION$>
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<     private Point fRadius;
<     private RoundRectangleFigure fOwner;
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<         fOwner = owner;
<     }
< 
<     public void invokeStart(int  x, int  y, DrawingView view) {
<         fRadius = fOwner.getArc();
<         fRadius.x = fRadius.x/2;
<         fRadius.y = fRadius.y/2;
---
> 		setUndoActivity(createUndoActivity());
> 		getUndoActivity().setAffectedFigures(new SingleFigureEnumerator(owner()));
> 		((RadiusHandle.UndoActivity)getUndoActivity()).setOldRadius(owner.getArc());
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<         Rectangle r = fOwner.displayBox();
<         int rx = Geom.range(0, r.width, 2*(fRadius.x + dx));
<         int ry = Geom.range(0, r.height, 2*(fRadius.y + dy));
<         fOwner.setArc(rx, ry);
---
> 		RoundRectangleFigure owner = (RoundRectangleFigure)owner();
> 		Rectangle r = owner.displayBox();
> 		Point originalRadius = ((RadiusHandle.UndoActivity)getUndoActivity()).getOldRadius();
> 		int rx = Geom.range(0, r.width, 2*(originalRadius.x/2 + dx));
> 		int ry = Geom.range(0, r.height, 2*(originalRadius.y/2 + dy));
> 		owner.setArc(rx, ry);
> 	}
> 
> 	public void invokeEnd(int x, int y, int anchorX, int anchorY, DrawingView view) {
> 		Point currentRadius = ((RoundRectangleFigure)owner()).getArc();
> 		Point originalRadius = ((RadiusHandle.UndoActivity)getUndoActivity()).getOldRadius();
> 		// there has been no change so there is nothing to undo
> 		if ((currentRadius.x == originalRadius.x) && (currentRadius.y == originalRadius.y)) {
> 			setUndoActivity(null);
> 		}
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<         Point radius = fOwner.getArc();
<         Rectangle r = fOwner.displayBox();
---
> 		RoundRectangleFigure owner = (RoundRectangleFigure)owner();
> 		Point radius = owner.getArc();
> 		Rectangle r = owner.displayBox();
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> 
> 	/**
> 	 * Factory method for undo activity. To be overriden by subclasses.
> 	 */
> 	protected Undoable createUndoActivity() {
> 		return new RadiusHandle.UndoActivity();
> 	}
> 	
> 	public static class UndoActivity extends UndoableAdapter {
> 		private Point myOldRadius;
> 		
> 		public UndoActivity() {
> 			super(null);
> 			setUndoable(true);
> 			setRedoable(true);
> 		}
> 		
> 		public boolean undo() {
> 			if (!super.undo()) {
> 				return false;
> 			}
> 
> 			return resetRadius();
> 		}
> 	
> 		public boolean redo() {
> 			// do not call execute directly as the selection might has changed
> 			if (!isRedoable()) {
> 				return false;
> 			}
> 
> 			return resetRadius();
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> 		protected boolean resetRadius() {
> 			FigureEnumeration fe = getAffectedFigures();
> 			if (!fe.hasMoreElements()) {
> 				return false;
> 			}
> 			RoundRectangleFigure currentFigure = (RoundRectangleFigure)fe.nextFigure();
> 			Point figureRadius = currentFigure.getArc();
> 			currentFigure.setArc(getOldRadius().x, getOldRadius().y);
> 			setOldRadius(figureRadius);
> 			return true;
> 		}
> 		
> 		protected void setOldRadius(Point newOldRadius) {
> 			myOldRadius = newOldRadius;
> 		}
> 
> 		public Point getOldRadius() {
> 			return myOldRadius;
> 		}
> 	}
> }