Adds @gesture to the same group than @group_gesture. Gestures
are by default isolated in their own groups.
When gestures are grouped, the state of #GdkEventSequences
is kept in sync for all of those, so calling gtk_gesture_set_sequence_state(),
on one will transfer the same value to the others.
Groups also perform an "implicit grabbing" of sequences, if a
#GdkEventSequence state is set to #GTK_EVENT_SEQUENCE_CLAIMED on one group,
every other gesture group attached to the same #GtkWidget will switch the
state for that sequence to #GTK_EVENT_SEQUENCE_DENIED.
Adds @gesture to the same group than @group_gesture. Gestures are by default isolated in their own groups.
When gestures are grouped, the state of #GdkEventSequences is kept in sync for all of those, so calling gtk_gesture_set_sequence_state(), on one will transfer the same value to the others.
Groups also perform an "implicit grabbing" of sequences, if a #GdkEventSequence state is set to #GTK_EVENT_SEQUENCE_CLAIMED on one group, every other gesture group attached to the same #GtkWidget will switch the state for that sequence to #GTK_EVENT_SEQUENCE_DENIED.