public void CleanUpFilledCacheNormalCase()
{
var target = new SizesCache();
target.AddOrChange(0, 40);
target.AddOrChange(0, 41);
target.AddOrChange(0, 42);
target.AddOrChange(0, 43);
target.CleanUp(0);
Assert.AreEqual(0, target.GetEstimate(0));
}
/// <summary>
/// Revirtualize items that are no longer visible
/// </summary>
/// <param name="minDesiredGenerated">first item index that should be visible</param>
/// <param name="maxDesiredGenerated">last item index that should be visible</param>
private void CleanUpItems(int minDesiredGenerated, int maxDesiredGenerated)
{
UIElementCollection children = this.InternalChildren;
IItemContainerGenerator generator = this.ItemContainerGenerator;
for (int i = children.Count - 1; i >= 0; i--)
{
GeneratorPosition childGeneratorPos = new GeneratorPosition(i, 0);
int itemIndex = generator.IndexFromGeneratorPosition(childGeneratorPos);
if (itemIndex < minDesiredGenerated || itemIndex > maxDesiredGenerated)
{
generator.Remove(childGeneratorPos, 1);
RemoveInternalChildRange(i, 1);
}
}
cachedSizes.CleanUp(maxDesiredGenerated);
}
