This features permits execution of more than one set of functions during
DnD.
Delete function API has been modified to give the developer the
possibility to remove a specific set of functions.
This feature is essential if two overlapping widgets can receive drop
information.
Until now, if two widgets (e.g background and button) were added as drop
targets, pointing to common coordinates would have given priority to the
first inserted as drop target.
Now, it will determine which widget is supposed to receive this drop
target by using the same mechanism as used for mouse move, i.e by
walking on the objects tree whose pointer passes through.
A test has been added (Overlapping DnD) to show how this feature can be
used. You can drop in bg, box and button.
Carsten Haitzler
Jihoon Kim
Daniel Juyung Seo
Daniel Juyung Seo
Daniel Zaoui
Chris Michael