Proposal to add a new target flag to DND

[Mario Antonio <orion07 wt net>]

This message is intended to be received by the GTK development team.

After working with GTK for a while, it was noticed that the targets were
limited to any drop location, a drop location within the same application
(GTK_TARGET_SAME_APP), or a drop location which must be the same as the source
(GTK_TARGET_SAME_WIDGET). It was noticed that there are other necessities which
are not covered yet like having a drop location which parent is the same parent
as the source widget. This option has been added and tested locally and it is
being put here for your consideration and for every GTK+ developer interested.
A new target flag named GTK_TARGET_SAME_PARENT has been added in the following
patch file. The patch considers version 1.2.4 as the source.

Please submit your comments.

Best Regards,

Mario Antonio

patch_gtk