private void ShowRandomRule(int?seed = null, bool addToHistory = true)
{
if (rules == null)
{
return;
}
if (seed == null)
{
seed = DateTime.Now.Millisecond;
}
Random random = new Random(seed.Value);
List <Rule> li = new List <Rule>();
Rule ru = rules[random.Next(rules.Count)];
li.Add(ru);
while (ru.SubRules.Count > 0)
{
ru = ru.SubRules[random.Next(ru.SubRules.Count)];
li.Add(ru);
}
if (addToHistory)
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
ScrollViewer scrollViewer = VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(list, 0), 0) as ScrollViewer;
if (scrollViewer != null)
{
actualSearch.VerticalOffset = scrollViewer.VerticalOffset;
}
history.Add(actualSearch);
actualSearch = new HistoryItem(HistoryType.Random, seed);
}
list.ItemsSource = li;
CustomEventlogger.Log("RandomRule");
homeButton.IsEnabled = true;
}
private void OnBackButtonRequested(object sender, BackRequestedEventArgs args)
{
if (history.Count >= 1)
{
HistoryItem item = history.Last();
switch (item.Type)
{
case HistoryType.Search:
Search((string)item.Value, false);
break;
case HistoryType.Number:
ShowByNumber((int)item.Value, false);
break;
case HistoryType.Text:
ShowByText((string)item.Value, false);
break;
case HistoryType.Random:
ShowRandomRule((int?)item.Value, false);
break;
}
list.UpdateLayout();
ScrollViewer scrollViewer = VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(list, 0), 0) as ScrollViewer;
scrollViewer?.ChangeView(null, item.VerticalOffset, null, true);
history.RemoveAt(history.Count() - 1);
actualSearch = item;
args.Handled = true;
if (history.Count == 0)
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Collapsed;
}
}
}
private void ShowByNumber(int number = 0, bool addToHistory = true)
{
if (rules == null)
{
return;
}
List <Rule> source = new List <Rule>();
if (number == 0)
{
source = rules;
}
else if (number >= 1 && number <= 9)
{
foreach (var rule in rules)
{
if (rule.Title.StartsWith(number + "."))
{
source.Add(rule);
foreach (var rule2 in rule.SubRules)
{
source.Add(rule2);
}
break;
}
}
}
else if (number >= 100 && number <= 999)
{
int high = number / 100;
foreach (var rule in rules)
{
if (rule.Title.StartsWith(high + "."))
{
source.Add(rule);
foreach (var rule2 in rule.SubRules)
{
if (rule2.Title.StartsWith(number + "."))
{
source.Add(rule2);
source.AddRange(rule2.SubRules);
break;
}
}
break;
}
}
}
else if (number == 10)
{
source.Add(rules.Last());
source.AddRange(rules.Last().SubRules);
}
if (source.Count > 0)
{
if (addToHistory)
{
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
ScrollViewer scrollViewer = VisualTreeHelper.GetChild(VisualTreeHelper.GetChild(list, 0), 0) as ScrollViewer;
if (scrollViewer != null)
{
actualSearch.VerticalOffset = scrollViewer.VerticalOffset;
}
history.Add(actualSearch);
actualSearch = new HistoryItem(HistoryType.Number, number);
}
list.ItemsSource = source;
homeButton.IsEnabled = number != 0;
}
}