/// <summary>
/// Removes a child at a certain index. Children above the child will move down.
/// </summary>
public DisplayObject RemoveChildAt(int index, bool dispose = false)
{
if (index >= 0 && index < _children.Count)
{
SetRequiresRedraw();
DisplayObject child = _children[index];
child.InvokeRemoved();
if (Stage != null)
{
child.BroadcastRemovedFromStageEvent(this);
}
child.Parent = null;
int newIndex = _children.IndexOf(child); // index might have changed in event handler
if (newIndex != -1)
{
_children.RemoveAt(newIndex);
}
if (dispose)
{
child.Dispose();
}
return(child);
}
throw new IndexOutOfRangeException("Invalid child index");
}
/// <summary>
/// Disposes all resources of the display object.
/// GPU buffers are released, event listeners are removed, filters and masks are disposed.
/// </summary>
public virtual void Dispose()
{
Added = null;
AddedToStage = null;
Removed = null;
RemovedFromStage = null;
EnterFrame = null;
Touch = null;
KeyUp = null;
KeyDown = null;
_filter?.Dispose();
_mask?.Dispose();
Mask = null; // clear 'mask._maskee', just to be sure.
}