public void BuildTree()
{
Entities.Clear();
Scenes.Clear();
//Add in the root scene
EntityTreeItem treeRoot = new EntityTreeItem(sceneInstance.RootScene);
Scenes.Add(new SceneItem(treeRoot));
Entities.Add(treeRoot);
//Loop through any children
foreach (var s in sceneInstance.RootScene.Children)
{
Children_CollectionChanged(null,
new Xenko.Core.Collections.TrackingCollectionChangedEventArgs(
System.Collections.Specialized.NotifyCollectionChangedAction.Add, s, null, 0, false)
);
}
//Then add the entities of the root scene
foreach (var entity in sceneInstance.RootScene.Entities)
{
OnEntityAdded(entity);
}
//Expand the root of the tree to open it
//TODO: Work out how the hell to do this
}
private void entityTreeView_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs <object> e)
{
selectedEntity = null;
ClearComponentView();
if (e == null || e.NewValue == null)
{
return;
}
var entity = e.NewValue as EntityTreeItem;
if (entity == null)
{
return;
}
selectedEntity = entity;
// Build component view and add components changed event handling.
// Spin up watcher thread to watch for component value changes.
if (entity.Entity.GetType() == typeof(Entity))
{
Entity actualEntity = (Entity)entity.Entity;
foreach (var component in actualEntity.Components)
{
OnComponentAdded(component);
}
}
componentsInitialized = true;
}
public void OnEntityAdded(Entity entity)
{
var treeItem = new EntityTreeItem(entity);
if (entity.Transform.Parent != null)
{
var parentEntity = entity.GetParent();
var parent = FindEntityInTree(Entities, parentEntity);
if (parent == null)
{
OnEntityAdded(parentEntity); //add non existent parent(s)
}
//add child to now exiting parent
parent = FindEntityInTree(Entities, parentEntity);
if (!parent.Children.Any(ti => ti.Entity == entity))
{
parent.Children.Add(treeItem);
}
}
else
{
if (!Entities.Any(ti => ti.Entity == entity))
{
Entities.Add(treeItem);
}
}
}
public SceneItem(EntityTreeItem sceneRoot)
{
Entities = sceneRoot.Children;
TreeRoot = sceneRoot;
this.scene = (Scene)sceneRoot.Entity;
}
private void OnEntityAdded(Entity entity)
{
Log($"Entity {entity.Name} added.");
var treeItem = new EntityTreeItem(entity);
if (entity.Transform.Parent != null)
{
var result = FindEntityInTree(Entities, entity.Transform.Parent.Entity);
if (result == null)
{
Entities.Add(treeItem);
}
else
{
result.Children.Add(treeItem);
}
}
else
{
Entities.Add(treeItem);
}
}
private void Children_CollectionChanged(object sender, Xenko.Core.Collections.TrackingCollectionChangedEventArgs e)
{
switch (e.Action)
{
case System.Collections.Specialized.NotifyCollectionChangedAction.Add:
Scene scene = (Scene)e.Item;
Scene parentScene = scene.Parent;
if (parentScene != null)
{
SceneItem parentInTree = FindSceneInTree(Scenes, parentScene);
if (parentInTree != null)
{
//Add in the scene into the tree
EntityTreeItem newSceneInTree = new EntityTreeItem(scene);
Scenes.Add(new SceneItem(newSceneInTree));
parentInTree.Entities.Add(newSceneInTree);
foreach (var entity in scene.Entities)
{
OnEntityAdded(entity);
}
//In the unlikely event that additional child scenes have been added before XLE
//pickup up the event, loop recruisevly
foreach (var s in scene.Children)
{
Children_CollectionChanged(null,
new Xenko.Core.Collections.TrackingCollectionChangedEventArgs(
System.Collections.Specialized.NotifyCollectionChangedAction.Add, s, null, 0, false)
);
}
}
}
break;
case System.Collections.Specialized.NotifyCollectionChangedAction.Remove:
//Trigger a rebuild of the tree
//Bit of task trickery here as the this even fires well before actual unloading
var t = Task.Factory.StartNew(() =>
{
Task.Delay(500).Wait(); //TODO: 500 is totally a magic number here
BuildTree();
},
CancellationToken.None,
TaskCreationOptions.None,
TaskScheduler.FromCurrentSynchronizationContext()
);
break;
case System.Collections.Specialized.NotifyCollectionChangedAction.Replace:
break;
case System.Collections.Specialized.NotifyCollectionChangedAction.Move:
break;
case System.Collections.Specialized.NotifyCollectionChangedAction.Reset:
break;
default:
break;
}
}
