public void Paint(DimensionHierarchy hierarchy, GridPosition startPosition, GridOrientation orientation)
{
var placement = new ZigZagPlacement(startPosition, orientation);
for (int level = 0; level < hierarchy.LevelCount; ++level)
{
var previousMeasurement = new object();
var currentItem = default(UIElement);
for (int keyIndex = 0; keyIndex < hierarchy.KeyCount; ++keyIndex)
{
var measurement = hierarchy.Keys[keyIndex].Measurements[level];
if (!Equals(previousMeasurement, measurement))
{
currentItem = _itemFactory.CreateHeaderItem(measurement);
_grid.Children.Add(currentItem);
if (keyIndex > 0)
{
placement.NextSlot();
}
placement.ApplySlot(currentItem);
}
else
{
placement.ExtendSlot();
placement.ApplySlot(currentItem);
}
previousMeasurement = measurement;
}
placement.NextLevel();
}
}