public ShellViewModel(IProvider provider)
{
_topBrush = new ObservableProperty <Brush>(DefaultBrush, this, () => TopBrush);
_leftBrush = new ObservableProperty <Brush>(DefaultBrush, this, () => LeftBrush);
_rightBrush = new ObservableProperty <Brush>(DefaultBrush, this, () => RightBrush);
_bottomBrush = new ObservableProperty <Brush>(DefaultBrush, this, () => BottomBrush);
_leftTopShelf = new ObservableProperty <Brush>(DefaultBrush, this, () => LeftTopShelf);
_leftMiddleShelf = new ObservableProperty <Brush>(DefaultBrush, this, () => LeftMiddleShelf);
_leftBottomShelf = new ObservableProperty <Brush>(DefaultBrush, this, () => LeftBottomShelf);
_rightTopShelf = new ObservableProperty <Brush>(DefaultBrush, this, () => RightTopShelf);
_rightMiddleShelf = new ObservableProperty <Brush>(DefaultBrush, this, () => RightMiddleShelf);
_rightBottomShelf = new ObservableProperty <Brush>(DefaultBrush, this, () => RightBottomShelf);
_fps = new ObservableProperty <int>(0, this, () => Fps);
_source = provider.Processed.Select(processed => processed.Layers.FirstOrDefault()).Where(value => value != null).ObserveOnDispatcher().Publish();
/*
* _source.Select(processed => processed.Left)
* .Select(colors => ToShelveColor(colors, Shelf.Top))
* .StartWith(DefaultColor)
* .Buffer(2)
* .Select(colors => new { Shelf = Shelf.Top, Color = colors[1], Difference = ColorDifference.FindDifference(colors[0], colors[1]) });
*
* _source.Select(processed => processed.Left).Select(colors => ToShelveColor(colors, Shelf.Middle));
* _source.Select(processed => processed.Left).Select(colors => ToShelveColor(colors, Shelf.Bottom));
*/
_brushSubscription = new CompositeDisposable(
_source.Buffer(TimeSpan.FromSeconds(1)).Select(buffer => buffer.Count).Subscribe(_fps),
_source.Select(processed => processed.Top).Select(colors => AsGradientBrush(colors, Side.Top)).Subscribe(_topBrush),
_source.Select(processed => processed.Left).Select(colors => AsGradientBrush(colors, Side.Left)).Subscribe(_leftBrush),
_source.Select(processed => processed.Right).Select(colors => AsGradientBrush(colors, Side.Right)).Subscribe(_rightBrush),
_source.Select(processed => processed.Bottom).Select(colors => AsGradientBrush(colors, Side.Bottom)).Subscribe(_bottomBrush)
);
}