timeline: Add a simplified version of track selection signal
authorThibault Saunier <tsaunier@igalia.com>
Wed, 8 Jul 2020 19:47:55 +0000 (15:47 -0400)
committerThibault Saunier <tsaunier@igalia.com>
Thu, 30 Jul 2020 22:44:13 +0000 (18:44 -0400)
commite6683f0c197f0adfef91d59c731ad1ae3be35af7
treef9560505375a97dcc12e5eeeabf6155a4d8a88ef
parent3a32247630d8a711434aecbebe5be7e53bc1c034
timeline: Add a simplified version of track selection signal

Most user do not need to select several tracks for a single
TrackElement and this signal is not binding friendly so
this is adding a simpler, more user and binding friendly version

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/merge_requests/198>
ges/ges-timeline.c