private void OnColorChanged(AShape shape)
{
if (shape == null)
{
throw new ArgumentNullException(nameof(shape));
}
ShapeCollection shapeCollection = EnsureEntities(shape.Color);
shapeCollection.Add(shape);
}
private ShapeCollection EnsureCollection(Color color)
{
if (shapeCollections.TryGetValue(color, out var shapeCollection))
{
return(shapeCollection);
}
shapeCollection = new ShapeCollection(color, GraphicsDevice, game.GraphicsContext);
shapeCollection.ColorChanged += OnColorChanged;
shapeCollections[color] = shapeCollection;
rootEntity.AddChild(shapeCollection.Entity);
return(shapeCollection);
}
private void Delete(ShapeCollection shapeCollection)
{
rootEntity.RemoveChild(shapeCollection.Entity);
shapeCollection.ColorChanged -= OnColorChanged;
shapeCollections.Remove(shapeCollection.Color);
}
