Emitted on the drop site when a drop operation is about to begin.
If the drop is not accepted,
FALSE will be returned and the drop target
will ignore the drop. If
TRUE is returned, the drop is accepted for now
but may be rejected later via a call to
or ultimately by returning
FALSE from a
The default handler for this signal decides whether to accept the drop
based on the formats provided by the
If the decision whether the drop will be accepted or rejected depends
on the data, this function should return
GtkDropTarget:preload property should be set and the value
should be inspected via the ::notify:value signal, calling
gtk_drop_target_reject() if required.
|Default handler: |
The default handler is called after the handlers added via
|Available since: 4.0|
The data is owned by the caller of the function.