private void NavigateToStarPage(Frame rootFrame, System.Object parameter)
{
//if we have already active background task, we can go strait viewing values from it
if (BackgroundManager.IsBackgroundTaskRegistered())
{
if (!rootFrame.Navigate(typeof(HeartBeatPage), parameter))
{
throw new Exception("Failed to create initial page");
}
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
}
else
{
if (!rootFrame.Navigate(typeof(MainPage), parameter))
{
throw new Exception("Failed to create initial page");
}
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Collapsed;
}
}
private async void App_BackRequested(object sender, Windows.UI.Core.BackRequestedEventArgs e)
{
Frame rootFrame = Window.Current.Content as Frame;
if (rootFrame == null)
{
return;
}
if (rootFrame.SourcePageType.Equals(typeof(HeartBeatPage)))
{
if (BackgroundManager.IsBackgroundTaskRegistered())
{
e.Handled = true;
//Todo, consider movcing this to be handled inside the UI, not in external popup
// so we are going back from HeartBeatPage and we have active background task
// so we need to ask whether we want to keep it or not
var dlg = new MessageDialog("Stop Background heartbeat monitoring ?");
dlg.Commands.Add(new UICommand("Yes", null, "YES"));
dlg.Commands.Add(new UICommand("No", null, "NO"));
var op = await dlg.ShowAsync();
if ((string)op.Id == "YES")
{
BackgroundManager.UnregisterBackgroundTask();
if (rootFrame.CanGoBack)
{ // if we started with Mainpage, we'll just go back
rootFrame.GoBack();
}
else
{ //but if we started with Heartbeat page, we actually need to navigate to the mainpage
rootFrame.Navigate(typeof(MainPage));
}
}
else
{
// lets let the background task run, while UI goes out
Exit();
}
return;
}
else if (rootFrame.CanGoBack)
{//this would be error situation, where we went to HeartBeatPage without active background task
rootFrame.GoBack();
}
}
if (rootFrame.SourcePageType.Equals(typeof(MainPage)))
{
e.Handled = true;
// from mainview we simply exit
Exit();
return;
}
// if we are here, we should just go back if it is possible
if (rootFrame.CanGoBack && !e.Handled)
{
e.Handled = true;
rootFrame.GoBack();
}
}