void RestoreState(object parameter, PageStateStorage storage)
{
List <string> savedNavigationHistory;
if (storage.TryGetParameter("DemoNavigationHistory", out savedNavigationHistory))
{
navigationHistory = savedNavigationHistory;
}
;
object hamburgerMenuItemGroupName = navigationHistory == null ? parameter : navigationHistory[navigationHistory.Count - 1];
SelectHamburgerMenuItemByParameter(hamburgerMenuItemGroupName);
if (hamburgerMenuItemGroupName.Equals(parameter))
{
return;
}
DemoModuleViewModel demoModule = DemoModules.FirstOrDefault(x => x.DemoModule.ViewTypeName.Equals(parameter));
if (demoModule != null)
{
UpdateFilteredDemoModules(demoModule);
NavigationLevel = NavigationLevel.DemoModule;
SelectedDemoModuleIndex = storage.GetParameter("SelectedDemoModuleIndex", SelectedDemoModuleIndex);
}
else
{
NavigationLevel = NavigationLevel.Main;
Navigate("MainPage", MainScreenId);
}
}
protected virtual void OnDemoModulesChanged()
{
if (DemoModules != null && CurrentPivotItem != null)
{
CurrentPivotItem.ViewModel = DemoModules.ElementAt(DemoModuleIndex);
}
}
protected virtual void OnSelectedDemoModuleChanged(DemoModuleViewModel oldValue, DemoModuleViewModel newValue)
{
ObservableCollection <DemoModuleViewModel> demoModules = new ObservableCollection <DemoModuleViewModel>();
ActualDemoModules.Clear();
int demoModuleIndex = DemoModules.IndexOf(newValue);
for (int i = 0; i < DemoModules.Count; i++)
{
ActualDemoModules.Add(DemoModules[demoModuleIndex]);
demoModuleIndex = (demoModuleIndex + 1) % DemoModules.Count;
}
}
void UpdateFilteredDemoModules(DemoModuleViewModel firstDemoModule)
{
int index = DemoModules.IndexOf(firstDemoModule);
FilteredDemoModules.Clear();
for (int i = index; i < DemoModules.Count; i++)
{
if (DemoModules[i].IsVisible)
{
FilteredDemoModules.Add(DemoModules[i]);
}
}
for (int i = 0; i < index; i++)
{
if (DemoModules[i].IsVisible)
{
FilteredDemoModules.Add(DemoModules[i]);
}
}
PrevNextEnabled = FilteredDemoModules.Count > 1;
}
private void OnPivotItemLoading(Pivot sender, PivotItemEventArgs args)
{
if (DemoModules == null)
{
return;
}
DemoModulePivotItem item = (DemoModulePivotItem)args.Item;
if (!loadingByDemoModuleIndexChanged && CurrentPivotItem != null)
{
int oldIndex = CurrentPivotItem.Index;
int newIndex = item.Index;
int count = DemoModules.Count();
SetDemoModuleIndexSilently((DemoModuleIndex + count + ((newIndex - oldIndex + 2) % 3 == 0 ? 1 : -1)) % count);
}
loadingByDemoModuleIndexChanged = false;
CurrentPivotItem = item;
CurrentPivotItem.PreferedOptionsVisibility = PreferedOptionsVisibility;
if (DemoModules != null)
{
item.ViewModel = DemoModules.ElementAt(DemoModuleIndex);
}
}
void ApplyFilter(string filterString)
{
DemoModules.ForEach(x => x.IsVisible = x.Group.Name == filterString || filterString == MainScreenId && x.DemoModule.IsHighlighted || string.IsNullOrEmpty(filterString));
ShowLabels = filterString == MainScreenId;
}
