public static DragAndDropVisualMode HandleClipPanePlayableAssetDragAndDrop(IEnumerable <IPlayableAsset> assetsBeingDropped, TrackAsset targetTrack, bool perform, TimelineAsset timeline, TrackAsset parent, PlayableDirector director, double candidateTime, TypeResolver typeResolver)
{
// get the list of supported track types
var assetTypes = assetsBeingDropped.Select(x => x.GetType()).Distinct();
IEnumerable <Type> supportedTypes = null;
if (targetTrack == null)
{
supportedTypes = TypeUtility.AllTrackTypes().Where(t => TypeUtility.GetPlayableAssetsHandledByTrack(t).Intersect(assetTypes).Any()).ToList();
}
else
{
supportedTypes = Enumerable.Empty <Type>();
var trackAssetTypes = TypeUtility.GetPlayableAssetsHandledByTrack(targetTrack.GetType());
if (trackAssetTypes.Intersect(assetTypes).Any())
{
supportedTypes = new[] { targetTrack.GetType() }
}
;
}
if (!supportedTypes.Any())
{
return(DragAndDropVisualMode.Rejected);
}
if (perform)
{
Action <Type> onResolved = (t) =>
{
if (targetTrack == null)
{
targetTrack = TimelineHelpers.CreateTrack(timeline, t, parent, string.Empty);
}
var clipTypes = TypeUtility.GetPlayableAssetsHandledByTrack(targetTrack.GetType());
foreach (var asset in assetsBeingDropped)
{
if (clipTypes.Contains(asset.GetType()))
{
TimelineHelpers.CreateClipOnTrackFromPlayableAsset(asset, targetTrack, candidateTime);
}
}
};
typeResolver(supportedTypes, onResolved, k_SelectTrackWithClip);
}
return(DragAndDropVisualMode.Copy);
}
