/// <inheritdoc />
protected override DragDropEffect OnDragDropHeader(DragData data)
{
var result = DragDropEffect.None;
Actor myActor = Actor;
Actor newParent;
int newOrder = -1;
// Check if has no actor (only for Root Actor)
if (myActor == null)
{
// Append to the last scene
var scenes = SceneManager.Scenes;
if (scenes == null || scenes.Length == 0)
{
throw new InvalidOperationException("No scene loaded.");
}
newParent = scenes[scenes.Length - 1];
}
else
{
newParent = myActor;
// Use drag positioning to change target parent and index
if (DragOverMode == DragItemPositioning.Above)
{
if (myActor.HasParent)
{
newParent = myActor.Parent;
newOrder = myActor.OrderInParent;
}
}
else if (DragOverMode == DragItemPositioning.Below)
{
if (myActor.HasParent)
{
newParent = myActor.Parent;
newOrder = myActor.OrderInParent + 1;
}
}
}
if (newParent == null)
{
throw new InvalidOperationException("Missing parent actor.");
}
// Drag actors
if (_dragActors != null && _dragActors.HasValidDrag)
{
bool worldPositionLock = Root.GetKey(Keys.Control) == false;
var singleObject = _dragActors.Objects.Count == 1;
if (singleObject)
{
var targetActor = _dragActors.Objects[0].Actor;
var customAction = targetActor.HasPrefabLink ? new ReparentAction(targetActor) : null;
using (new UndoBlock(ActorNode.Root.Undo, targetActor, "Change actor parent", customAction))
{
targetActor.SetParent(newParent, worldPositionLock);
targetActor.OrderInParent = newOrder;
}
}
else
{
var targetActors = _dragActors.Objects.ConvertAll(x => x.Actor);
var customAction = targetActors.Any(x => x.HasPrefabLink) ? new ReparentAction(targetActors) : null;
using (new UndoMultiBlock(ActorNode.Root.Undo, targetActors, "Change actors parent", customAction))
{
for (int i = 0; i < targetActors.Count; i++)
{
var targetActor = targetActors[i];
targetActor.SetParent(newParent, worldPositionLock);
targetActor.OrderInParent = newOrder;
}
}
}
result = DragDropEffect.Move;
}
// Drag assets
else if (_dragAssets != null && _dragAssets.HasValidDrag)
{
for (int i = 0; i < _dragAssets.Objects.Count; i++)
{
var item = _dragAssets.Objects[i];
switch (item.ItemDomain)
{
case ContentDomain.Model:
{
if (item.TypeName == typeof(SkinnedModel).FullName)
{
// Create actor
var model = FlaxEngine.Content.LoadAsync <SkinnedModel>(item.ID);
var actor = AnimatedModel.New();
actor.StaticFlags = Actor.StaticFlags;
actor.Name = item.ShortName;
actor.SkinnedModel = model;
actor.Transform = Actor.Transform;
// Spawn
ActorNode.Root.Spawn(actor, Actor);
}
else
{
// Create actor
var model = FlaxEngine.Content.LoadAsync <Model>(item.ID);
var actor = StaticModel.New();
actor.StaticFlags = Actor.StaticFlags;
actor.Name = item.ShortName;
actor.Model = model;
actor.Transform = Actor.Transform;
// Spawn
ActorNode.Root.Spawn(actor, Actor);
}
break;
}
case ContentDomain.Other:
{
if (item.TypeName == typeof(CollisionData).FullName)
{
// Create actor
var actor = MeshCollider.New();
actor.StaticFlags = Actor.StaticFlags;
actor.Name = item.ShortName;
actor.CollisionData = FlaxEngine.Content.LoadAsync <CollisionData>(item.ID);
actor.Transform = Actor.Transform;
// Spawn
ActorNode.Root.Spawn(actor, Actor);
}
else if (item.TypeName == typeof(ParticleSystem).FullName)
{
// Create actor
var actor = ParticleEffect.New();
actor.StaticFlags = Actor.StaticFlags;
actor.Name = item.ShortName;
actor.ParticleSystem = FlaxEngine.Content.LoadAsync <ParticleSystem>(item.ID);
actor.Transform = Actor.Transform;
// Spawn
ActorNode.Root.Spawn(actor, Actor);
}
else if (item.TypeName == typeof(SceneAnimation).FullName)
{
// Create actor
var actor = SceneAnimationPlayer.New();
actor.StaticFlags = Actor.StaticFlags;
actor.Name = item.ShortName;
actor.Animation = FlaxEngine.Content.LoadAsync <SceneAnimation>(item.ID);
actor.Transform = Actor.Transform;
// Spawn
ActorNode.Root.Spawn(actor, Actor);
}
break;
}
case ContentDomain.Audio:
{
// Create actor
var actor = AudioSource.New();
actor.StaticFlags = Actor.StaticFlags;
actor.Name = item.ShortName;
actor.Clip = FlaxEngine.Content.LoadAsync <AudioClip>(item.ID);
actor.Transform = Actor.Transform;
// Spawn
ActorNode.Root.Spawn(actor, Actor);
break;
}
case ContentDomain.Prefab:
{
// Create prefab instance
var prefab = FlaxEngine.Content.LoadAsync <Prefab>(item.ID);
var actor = PrefabManager.SpawnPrefab(prefab, null);
actor.StaticFlags = Actor.StaticFlags;
actor.Name = item.ShortName;
actor.Transform = Actor.Transform;
// Spawn
ActorNode.Root.Spawn(actor, Actor);
break;
}
}
}
result = DragDropEffect.Move;
}
// Drag actor type
else if (_dragActorType != null && _dragActorType.HasValidDrag)
{
for (int i = 0; i < _dragActorType.Objects.Count; i++)
{
var item = _dragActorType.Objects[i];
// Create actor
var actor = FlaxEngine.Object.New(item) as Actor;
if (actor == null)
{
Editor.LogWarning("Failed to spawn actor of type " + item.FullName);
continue;
}
actor.StaticFlags = Actor.StaticFlags;
actor.Name = item.Name;
actor.Transform = Actor.Transform;
// Spawn
ActorNode.Root.Spawn(actor, Actor);
}
result = DragDropEffect.Move;
}
// Clear cache
_dragHandlers.OnDragDrop(null);
// Check if scene has been modified
if (result != DragDropEffect.None)
{
var node = SceneGraphFactory.FindNode(newParent.ID) as ActorNode;
node?.TreeNode.Expand();
}
return(result);
}
