I have a custom object that extends ShapeNode. This object uses two manipulators, both custom made. With the new changes in 4.0, making the coordinate system to be localized has caused these to malfunction. I have figured out what the problem is.

The DiagramNode class contains the following two methods:

@Override
Manipulator manipulatorEnacted(Point2D pt)
{
    	if (manipulators == null)
    		return null;
	for (Manipulator manipulator : manipulators)
	{
		if (manipulator.drawsInLocalCoordinates())
			pt = translatePointToLocal(pt);

		if (manipulator.hitTest(pt))
			return manipulator;
	}

	return null;
}

@Override
boolean ptInManipulator(Point2D pt)
{
    	if (manipulators == null)
    		return false;
	for (Manipulator manipulator : manipulators)
	{
		if (manipulator.drawsInLocalCoordinates())
			pt = translatePointToLocal(pt);

		if (manipulator.ptInManipulator(pt))
			return true;
	}

	return false;
} 

The manipulator.drawsInLocalCoordinates() check is overwriting the Point2D pt object multiple times with a newer local coordinate and hence causing the subsequent manipulators tests to fail.

I am currently overriding these methods in my custom object with the following code:

@Override
Manipulator manipulatorEnacted(Point2D pt)
{
    	if (manipulators == null)
    		return null;
	for (Manipulator manipulator : manipulators)
	{
		Point2D testPt = pt;
		if (manipulator.drawsInLocalCoordinates())
			testPt = translatePointToLocal(testPt);

		if (manipulator.hitTest(testPt))
			return manipulator;
	}

	return null;
}

@Override
boolean ptInManipulator(Point2D pt)
{
    	if (manipulators == null)
    		return false;
	for (Manipulator manipulator : manipulators)
	{
		Point2D testPt = pt;
		if (manipulator.drawsInLocalCoordinates())
			testPt = translatePointToLocal(testPt);

		if (manipulator.hitTest(testPt))
			return manipulator;
	}

	return false;
} 

I hope this helps!