private static ObservableCollection <object> CreateItems(Random random, DemoItem parent, int depth, int maxDepth, int labelIndex = 0)
{
int itemsCount = random.Next((int)Math.Pow(10, depth + 1));
var items = new ObservableCollection <object>();
for (int itemIndex = 0; itemIndex < itemsCount; itemIndex++)
{
if (random.Next(11) == 0)
{
var errorItem = new ErrorItem();
items.Add(errorItem);
}
else
{
var item = new DemoItem();
item.Label = (parent != null ? parent.Label + "." : "") + ++labelIndex;
item.IsExpanded = random.Next(5) == 0;
items.Add(item);
if (depth < maxDepth)
{
foreach (var childItem in CreateItems(random, item, depth + 1, maxDepth))
{
item._children.Add(childItem);
}
}
}
}
return(items);
}
private static void AppendDemoItems(ObservableCollection <object> root)
{
foreach (var i in DemoItem.CreateItems(2, null, root.Count))
{
root.Add(i);
}
}
private static void AppendFirstContent(ObservableCollection <object> root)
{
var firstItem = root[0] as DemoItem;
if (firstItem == null)
{
root[0] = firstItem = new DemoItem {
Label = "1"
}
}
;
foreach (var childItem in DemoItem.CreateItems(1, firstItem, seed: 3, labelIndex: firstItem.Children.Count))
{
firstItem.Children.Add(childItem);
}
}
public static ObservableCollection <object> CreateItems(int depth, DemoItem parent, int seed = 0, int labelIndex = 0) => CreateItems(new Random(seed), parent, 0, depth, labelIndex);
private void ResetContent(object sender, RoutedEventArgs e)
{
++_contentGeneration;
DemoItem.Root = DemoItem.CreateItems(2, null, _contentGeneration);
DemoItem.Root2 = DemoItem.CreateItems(2, null, _contentGeneration);
}