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timeline: Add a simplified version of track selection signal

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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>
This commit is contained in:
Thibault Saunier 2020-07-08 15:47:55 -04:00
parent 3a32247630
commit e6683f0c19
1 changed files with 33 additions and 2 deletions
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35
ges/ges-timeline.c
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@ -272,6 +272,7 @@ enum
SNAPING_ENDED,
SELECT_TRACKS_FOR_OBJECT,
COMMITED,
SELECT_ELEMENT_TRACK,
LAST_SIGNAL
};
@ -844,6 +845,25 @@ ges_timeline_class_init (GESTimelineClass * klass)
G_SIGNAL_RUN_LAST, 0, _gst_array_accumulator, NULL, NULL,
G_TYPE_PTR_ARRAY, 2, GES_TYPE_CLIP, GES_TYPE_TRACK_ELEMENT);
/**
* GESTimeline::select-element-track:
* @timeline: The #GESTimeline
* @clip: The clip that @track_element is being added to
* @track_element: The element being added
*
* Simplified version of #GESTimeline::select-tracks-for-object which only
* allows @track_element to be added to a single #GESTrack.
*
* Returns: (transfer full): A track to put @track_element into, or %NULL if
* it should be discarded.
*
* Since: 1.18
*/
ges_timeline_signals[SELECT_ELEMENT_TRACK] =
g_signal_new ("select-element-track", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL,
GES_TYPE_TRACK, 2, GES_TYPE_CLIP, GES_TYPE_TRACK_ELEMENT);
/**
* GESTimeline::commited:
* @timeline: The #GESTimeline
@ -1437,10 +1457,21 @@ _get_selected_tracks (GESTimeline * timeline, GESClip * clip,
{
guint i, j;
GPtrArray *tracks = NULL;
GESTrack *track = NULL;
g_signal_emit (G_OBJECT (timeline),
ges_timeline_signals[SELECT_TRACKS_FOR_OBJECT], 0, clip, track_element,
&tracks);
ges_timeline_signals[SELECT_ELEMENT_TRACK], 0, clip, track_element,
&track);
if (track) {
tracks = g_ptr_array_new ();
g_ptr_array_add (tracks, track);
} else {
g_signal_emit (G_OBJECT (timeline),
ges_timeline_signals[SELECT_TRACKS_FOR_OBJECT], 0, clip, track_element,
&tracks);
}
if (tracks == NULL)
tracks = g_ptr_array_new ();