protected override bool RenderSubtree()
{
if (!base.RenderSubtree())
{
return(false);
}
var context = Node.FindNearestContext <IDrawableRenderContext>().Value;
if (context == null)
{
return(false);
}
// create drawable
var drawable = (Drawable = UseRef <T>()).Current;
bool drawableCreated;
if (drawable == null)
{
drawable = Drawable.Current = CreateDrawable();
drawableCreated = true;
}
else
{
drawableCreated = false;
}
drawable.Name = Key.ToString();
// add styling and events
ApplyStyles(drawable);
ApplyEvents(drawable);
// render drawable
var explicitDepth = UseRef(drawableCreated && drawable.Depth != 0).Current;
context.Render(drawable, explicitDepth);
// invoke ref callback
if (drawableCreated)
{
Ref?.Invoke(drawable);
}
// schedule expiry on unmount
UseEffect(() => () =>
{
drawable.Expire();
Ref?.Invoke(null);
}, null);
return(true);
}
/// <summary>
/// Creates a new <see cref="ofTransform"/>.
/// </summary>
public ofTransform(ElementKey key = default, IEnumerable <ofElement> children = default, RefDelegate <ofTransform> @ref = default) : base(key, children, new Context())
{
@ref?.Invoke(this);
}