public void Paint(
DimensionHierarchy horizontalHierarchy,
DimensionHierarchy verticalHierarchy,
GridPosition startPosition)
{
var placement = new ZigZagPlacement(startPosition, GridOrientation.Horizontal);
foreach (var verticalFactKey in verticalHierarchy.Keys)
{
foreach (var horizontalFactKey in horizontalHierarchy.Keys)
{
var factKey = horizontalFactKey.Merge(verticalFactKey);
var fact = FindFact(factKey);
var factItem = _itemFactory.CreateFactItem(fact);
_grid.Children.Add(factItem);
placement.ApplySlot(factItem);
placement.NextSlot();
}
placement.NextLevel();
}
}