As per MSDN guidelines we need to put all the app's settings into the SettingsPane and then the app should update all pages when the settings is applied.
In my app I need to have a reset option which brings the app to the default settings. There are 2 pages, Calendar.xaml and HistoryStatistics.xaml that i need to update when the reset button is pressed. All the data of the app is put in a singleton class called CycleManager. I have used a SettingsFlyout control from the Callisto Toolkit.
App.Xaml
Registered the settings in the App.xaml
SettingsPane.GetForCurrentView().CommandsRequested += OnCommandsRequested;
and in OnCommandsRequested
function, created the reset handler
var reset = new SettingsCommand("reset", "Reset", (handler) =>
{
var settings = new SettingsFlyout();
settings.Content = new ResetUserControl();
settings.HeaderBrush = new SolidColorBrush(_background);
settings.Background = new SolidColorBrush(_background);
settings.HeaderText = "Reset";
settings.IsOpen = true;
});
args.Request.ApplicationCommands.Add(reset);
CycleManager.cs
In the CycleManager class, there is a m_Reset variable,its setter and getter and an event handler called ResetClicked
public event EventHandler ResetClicked;
public bool Reset
{
get
{
return m_reset;
}
set
{
m_reset = value;
if (ResetClicked != null)
ResetClicked(this, EventArgs.Empty);
}
}
Next is the part where i have associated this handler in my first class calendar.xaml
Calendar.xaml
In the constructor of the class I declare the event handler
CycleManager pCycMan = CycleManager.Instance;
pCycMan.ResetClicked += this.ResetClicked;
followed by the definition of the event handler
private async void ResetClicked(object sender, EventArgs e)
{
CycleManager pCycMan = CycleManager.Instance;
if (pCycMan.Reset == true)
{
try
{
await Windows.Storage.ApplicationData.Current.ClearAsync(Windows.Storage.ApplicationDataLocality.Local);
pCycMan.InitializeValues();
}
catch (Exception)
{
}
}
CreateCalendar();// UI is loaded
}
In the constructor of the HistoryStatistics.xaml I have done the same thing as above
HistoryStatistics.xaml
public HistoryStatistics()
{
CycleManager pCycMan = CycleManager.Instance;
pCycMan.ResetClicked += this.ResetClicked;
}
and defined
private void ResetClicked(object sender, EventArgs e)
{
CycleManager pCycMan = CycleManager.Instance;
if (pCycMan.Reset == true)
{
await Windows.Storage.ApplicationData.Current.ClearAsync(Windows.Storage.ApplicationDataLocality.Local);
pCycMan.InitializeValues();
LoadListView();// loads the UI
DisplayStatistics();//loads the UI for the page
}
}
Now the problem
Is this the right approach?
When Reset is pressed in the first from the second page(HistoryStatistcs), the reset clicked function declared in the first page(Calendar.xaml.cs) is called first and then the one in HistoryStatistics. And both gets executed async! :(
Is this a right behaviour?
This question is quite long. Hope everybody understood the scenario and question.