Fix position of anchorages when dragging

While dragging a port of a component, the port was not directly under
the mouse, but slightly to the side. This patch centers the port under
the mouse.

Issue-Ref: 3924
Issue-Url: https://af3-developer.fortiss.org/issues/3924


Signed-off-by: Ulrich Schöpp <schoepp@fortiss.org>

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/controller/rectangular/.ratings

 DiamondResizableContentControllerBase.java 31f227e88205bd2e131326bdddd8421991b47d79 YELLOW
-RectangularContentAnchorageMoveController.java c119b011f5a38933cee07b8082fcd44c6c3b0037 YELLOW
+RectangularContentAnchorageMoveController.java 78b55be1a974ee1bca89a7934afb504f56bd495a YELLOW
 RectangularResizableContentControllerBase.java 262b083e4e0ce842b0bb8fbb594585e9f0d2f678 YELLOW
 RhomboidContentAnchorageMoveController.java fbd40ce483f99c18cfa94076374f572bb72c2646 YELLOW
 RhomboidResizableContentControllerBase.java 863b9eae49bad18f71b20c8cde4b0f350348aa27 YELLOW

org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/controller/rectangular/RectangularContentAnchorageMoveController.java

@@ -44,8 +44,9 @@ public class RectangularContentAnchorageMoveController extends ContentAnchorageM
 		Dimension2D anchorageSize =
 				new Dimension2D(anchorageBounds.getWidth(), anchorageBounds.getHeight());
 		Dimension2D borderSnap = overrideBorderSnap(anchorageSize);
-		DiagramCoordinate p = new DiagramCoordinate(anchorageBounds.getMinX() + delta.getX(),
-				anchorageBounds.getMinY() + delta.getY());
+		DiagramCoordinate p = new DiagramCoordinate(
+				anchorageBounds.getMinX() + anchorageSize.getWidth() / 2 + delta.getX(),
+				anchorageBounds.getMinY() + anchorageSize.getHeight() / 2 + delta.getY());
 		return getClosestLocationOnBounds(p, contentBounds, anchorageSize, borderSnap);
 	}