/// <summary>
/// Checks if user preferences already exist.
/// If so, redirect user to the next page.
/// If not, initialize starting page
/// </summary>
/// <param name="e"></param>
protected async override void OnNavigatedTo(NavigationEventArgs e)
{
if (isFirstNavigation)
{
if (IsolatedStorageSettings.ApplicationSettings.Contains("preferences"))
{
string[] preferences = JsonConvert.DeserializeObject<string[]>
(IsolatedStorageSettings.ApplicationSettings["preferences"].ToString());
NavigationService.Navigate(new Uri(string.Format("/CountrySelect.xaml?countryId={0}&role={1}&prog={2}",
preferences[0], preferences[1], preferences[2]), UriKind.Relative));
return;
}
Country = new CountryModel()
{
Countries = await App.MobileService.GetTable<CountryData>().ToListAsync()
};
foreach (CountryData data in Country.Countries)
{
data.FlagImage = ImageConversionHelper.ToImage(data.Flag);
data.Flag = String.Empty;
}
DataContext = Country;
isFirstNavigation = false;
}
}
/// <summary>
/// Checks if 'search' parameter exists
/// If parameter does exists, get the filtered results and pass it to DataContext
/// If parameter does not exists, do nothing
/// </summary>
/// <param name="e"></param>
/// <summary>
protected async override void OnNavigatedTo(NavigationEventArgs e)
{
listBox.Opacity = 0;
//If this is initial call to the event
if (isFirstNavigation)
{
SystemTray.ProgressIndicator = new ProgressIndicator();
ProgressIndicatorHelper.SetProgressBar(true, AppResources.ProgressIndicatorCountries);
//Get index of previously selected country
int selectedCountryIndex = Int32.Parse(IsolatedStorageSettings.
ApplicationSettings["selectedCountryIndex"].ToString());
//Populate CountryModel with every CountryData that satisfies parameters
model = new CountryModel()
{
Countries = await App.MobileService.GetTable<CountryData>().
Where(x => x.Id != selectedCountryIndex).
ToListAsync()
};
Random rand = new Random();
//Convert Flag to FlagImage
//After conversion, empty Flag property
foreach (CountryData data in model.Countries)
{
if(data.Rating == 0.0)
data.Rating = rand.Next(0, 5);
data.FlagImage = ImageConversionHelper.ToImage(data.Flag);
data.Flag = String.Empty;
}
//initialize double array for country coordinates
countryCoordinates = new double[2];
ProgressIndicatorHelper.SetProgressBar(false, null);
isFirstNavigation = false;
}
textBoxSearch.Text = String.Empty;
textBoxSearch.Visibility = System.Windows.Visibility.Collapsed;
//If user has entered a search term
if (NavigationContext.QueryString.ContainsKey("search"))
{
sortCounter = 0;
string searchTerm = NavigationContext.QueryString["search"];
//Populate CountryModel with data that satisfies search term
//Always search entire model, not DataContext
CountryModel filteredModel = new CountryModel()
{
Countries = model.Countries.Where(x => x.Name.Contains(searchTerm)).ToList()
};
//filteredModel.Countries = model.Countries.Where(x => x.Name.Contains(searchTerm)).ToList();
DataContext = filteredModel;
//Preserve map visibility across navigation/refresh
if (isMapVisible)
map.Visibility = System.Windows.Visibility.Visible;
}
else
DataContext = model;
//Animate listBox with countries
AnimationHelper.Fade(listBox, 1, 700, new PropertyPath(OpacityProperty));
}
/// <summary>
/// Sorts the country list by highest rating, and alphabetically (both ascending and descending)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void sortIconButton_Click(object sender, EventArgs e)
{
if (sortCounter == 0)
DataContext = new CountryModel() { Countries = (DataContext as CountryModel).
Countries.OrderByDescending(x => x.Rating).ToList() };
else if (sortCounter == 1)
DataContext = new CountryModel() { Countries = (DataContext as CountryModel).
Countries.OrderByDescending(x => x.Name).ToList() };
else
DataContext = new CountryModel() { Countries = (DataContext as CountryModel).
Countries.OrderBy(x => x.Name).ToList() };
sortCounter += 1;
if (sortCounter == 3)
sortCounter = 0;
}
