IKImageView loses its focus for drag and drop when it is enclosed by NSScrollView

Question

I Have an IKImageView enclosed by NSScrollView and a NSSlider for zooming the image in and out. IKImageView Supports drag and drop when the image is in normal size, but it loses its focus when the image is zoomed in. (If I scroll the IKImageView to the bottom left corner it supports drag and drop). How can I solve this problem ?

Answer 1

Accept the NSDragOperation though the NSScrollView instead of the IKImageView.
Next update the IKImageView from the NSScrollView subclass.