private void Draw()
{
var visuals = new List <Visual>();
var backgroundVisual = _renderer.DrawBackground(this.ActualWidth, this.ActualHeight);
visuals.Add(backgroundVisual);
var items = GetItems();
var selectedItems = GetSelectedItems();
if (items != null && selectedItems != null)
{
foreach (var item in items)
{
item.IsSelected = selectedItems.Any(p => p.Id == item.Id);
}
}
var plotVisuals = _renderer.DrawItems(items);
visuals.AddRange(plotVisuals);
_visualService.Clear();
_visualService.Add(visuals);
}