/// <summary>
/// Updates viewmodel to reflect the navigation that just occurred
/// either via Bxf or via the browser navigation buttons or address bar.
/// </summary>
/// <param name="sender">Sender</param>
/// <param name="e">Event args</param>
public void Navigated(object sender, Bxf.Xaml.ExecuteEventArgs e)
{
var args = (NavigationEventArgs)e.TriggerParameter;
var viewName = args.Uri.OriginalString;
if (string.IsNullOrWhiteSpace(viewName))
viewName = "Home";
string queryString = null;
var param = viewName.IndexOf("?");
if (param > 0)
{
queryString = viewName.Substring(param + 1);
viewName = viewName.Substring(0, param);
}
foreach (var child in this.MenuItems)
{
child.SetState(viewName);
if (args.Content != null && child.Uri == viewName && !string.IsNullOrEmpty(child.ViewModelResourceName) && child.ViewModelType != null)
{
object vm;
if (queryString == null)
vm = Activator.CreateInstance(child.ViewModelType);
else
vm = Activator.CreateInstance(child.ViewModelType, queryString);
var cvs = (CollectionViewSource)((Control)args.Content).Resources[child.ViewModelResourceName];
if (vm is IEnumerable)
cvs.Source = vm;
else
cvs.Source = new List<object> { vm };
}
}
}
protected override void InitializeBindingResource(Bxf.IView view)
{
if (view != null && !string.IsNullOrEmpty(view.ViewName) && !view.ViewName.StartsWith("/"))
base.InitializeBindingResource(view);
// otherwise do nothing since the view is "lazy loaded" by
// the navigation engine and the viewmodel is created
// later
}
public void MenuItemSelected(object sender, Bxf.Xaml.ExecuteEventArgs e)
{
var listbox = (ListBox)e.TriggerSource;
var menuItem = (MenuItem)listbox.SelectedItem;
if (menuItem.IsAuthorized)
menuItem.Method();
else
Bxf.Shell.Instance.ShowError("You are not authorized to perform this action", "Authorization error");
}
protected override void InitializeBindingResource(Bxf.IView view)
{
PendingView = view;
}
/// <summary>
/// Updates viewmodel to reflect the navigation that just occurred
/// either via Bxf or via the browser navigation buttons or address bar.
/// </summary>
/// <param name="sender">Sender</param>
/// <param name="e">Event args</param>
public void Navigated(object sender, Bxf.Xaml.ExecuteEventArgs e)
{
var args = (NavigationEventArgs)e.TriggerParameter;
if (args != null && args.Content != null)
{
var viewName = args.Uri.OriginalString;
if (string.IsNullOrEmpty(viewName))
viewName = "/MainPage.xaml";
string queryString = null;
var param = viewName.IndexOf("?");
if (param > 0)
{
queryString = viewName.Substring(param + 1);
viewName = viewName.Substring(0, param);
}
object viewmodel = null;
// setup viewmodel for pages
if (viewName.Contains("/TestPage.xaml"))
viewmodel = new ViewModels.TestViewModel(queryString);
((Control)args.Content).DataContext = viewmodel;
}
}
protected override void InitializeBindingResource(Bxf.IView view)
{
// do nothing since the view is "lazy loaded" by
// the navigation engine and the viewmodel is created
// later
}
/// <summary>
/// Handle case where navigation has failed by invoking
/// standard error/exception handling.
/// </summary>
/// <param name="sender">Sender</param>
/// <param name="e">Event args</param>
public void NavigationFailed(object sender, Bxf.Xaml.ExecuteEventArgs e)
{
var args = (NavigationFailedEventArgs)e.TriggerParameter;
args.Handled = true;
Bxf.Shell.Instance.ShowError(string.Format("Page not found: {0}", args.Uri.OriginalString), "Navigation failure");
}