only update GhostEvents on visible trackviews.
authornick_m <mainsbridge@gmail.com>
Thu, 22 Dec 2016 15:55:51 +0000 (02:55 +1100)
committernick_m <mainsbridge@gmail.com>
Thu, 22 Dec 2016 15:55:51 +0000 (02:55 +1100)
commit37e858da7dbf645900a596c765ff4d58b8b6df3d
tree1028d8ec36e45e3825489b846e8c2034357442df
parent96048ad4c09aca166dcccce9abe91da209a09b93
only update GhostEvents on visible trackviews.

- this requires that MidiGhostRegion::update_contents_height()
  also controls visibility.
gtk2_ardour/ghostregion.cc
gtk2_ardour/midi_region_view.cc
gtk2_ardour/time_axis_view.cc