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1
8 package com.nightlabs.editor2d.handle;
9
10 import org.eclipse.draw2d.IFigure;
11 import org.eclipse.draw2d.Locator;
12 import org.eclipse.draw2d.geometry.Dimension;
13 import org.eclipse.draw2d.geometry.Point;
14 import org.eclipse.draw2d.geometry.Rectangle;
15
16 import com.nightlabs.editor2d.edit.AbstractDrawComponentEditPart;
17
18
19 public class RotateCenterLocator
20 implements Locator
21 {
22 protected AbstractDrawComponentEditPart owner;
23 public RotateCenterLocator(AbstractDrawComponentEditPart owner)
24 {
25 this.owner = owner;
26 }
27
28 protected Point getLocation()
29 {
30 return new Point(owner.getDrawComponent().getRotationX(),
31 owner.getDrawComponent().getRotationY());
32 }
33
34 public void relocate(IFigure target)
35 {
36 target.setLocation(calcCenterPoint(target.getBounds(), getReferencePoint(target)));
37 }
38
39 protected Point calcCenterPoint(Rectangle rect, Point point)
40 {
41 Dimension boundsSize = rect.getSize();
42 return new Point(point.x - boundsSize.width/2, point.y - boundsSize.height/2);
43 }
44
45 protected Point getReferencePoint(IFigure target)
46 {
47 Point p = getLocation();
48 owner.getFigure().translateToAbsolute(p);
49 target.translateToRelative(p);
50 return p;
51 }
52 }
53
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