/// <summary>
/// Binds the view model.
/// </summary>
/// <param name="view">The view.</param>
/// <param name="viewModel">The view model.</param>
protected virtual async Task BindViewModel(DependencyObject view, object viewModel = null)
{
ViewLocator.InitializeComponent(view);
viewModel = viewModel ?? ViewModelLocator.LocateForView(view);
if (viewModel == null)
{
return;
}
if (treatViewAsLoaded)
{
view.SetValue(View.IsLoadedProperty, true);
}
TryInjectParameters(viewModel, CurrentParameter);
ViewModelBinder.Bind(viewModel, view, null);
if (viewModel is IActivate activator)
{
activator.Activate();
}
// frame.NavigateToType(typeof(view), true, new FrameNavigationOptions() { IsNavigationStackEnabled = true });
}
public bool Navigate(Type pageType)
{
// Do guardclose and deactivate stuff here by looking at shell.ActiveItem
// e.g.
var guard = shell.ActiveItem as IGuardClose;
if (guard != null)
{
var shouldCancel = false;
guard.CanClose(result => { shouldCancel = !result; });
if (shouldCancel)
{
e.Cancel = true;
return;
}
}
// etc
// Obviously since the guard is async you'd have to not call this code right
// here but I've just stuck it in here as an example
// You might get away with calling shell.ActivateItem(pageType) as I'm not sure
// if the CM conductor in RT would resolve this for you, but if it doesnt...
// Init the view and then resolve the VM type
ViewLocator.InitializeComponent(pageType);
var viewModel = ViewModelLocator.LocateForView(pageType);
// Activate the VM in the shell)
shell.ActivateItem(viewModel);
}
/// <summary>
/// Occurs after navigation
/// </summary>
/// <param name="sender">The event sender.</param>
/// <param name="e">The event args.</param>
protected virtual void OnNavigated(object sender, NavigationEventArgs e)
{
if (e.Uri.IsAbsoluteUri)
{
return;
}
ViewLocator.InitializeComponent(e.Content);
var viewModel = ViewModelLocator.LocateForView(e.Content);
if (viewModel == null)
{
return;
}
ViewModelBinder.Bind(viewModel, (DependencyObject)e.Content, null);
TryInjectQueryString(viewModel, e.Content);
var activator = viewModel as IActivate;
if (activator != null)
{
activator.Activate();
}
}
public bool Navigate(Type pageType)
{
// Do guardclose and deactivate stuff here by looking at shell.ActiveItem
// e.g.
var guard = shell.ActiveItem as IGuardClose;
if (guard != null)
{
var shouldCancel = false;
guard.CanClose(result => { shouldCancel = !result; });
if (shouldCancel)
{
e.Cancel = true;
return;
}
}
// etc
// Obviously since the guard is probably async (assume it is, if not you are ok to continue!) you'd have to not call this code right
// here but I've just stuck it in here as an example
// edit: looking at the code above (the guard code) it looks like this is all sync so the below code should be fine
// You might get away with calling shell.ActivateItem(pageType) as I'm not sure
// if the viewmodel binder in RT would resolve this all for you, but if it doesnt...
// Init the view and then resolve the VM type
ViewLocator.InitializeComponent(pageType);
var viewModel = ViewModelLocator.LocateForView(pageType);
// Activate the VM in the shell)
shell.ActivateItem(viewModel);
}
private UIElement GetOrCreateViewType(Type viewType)
{
Contract.Requires(viewType != null);
var cached = IoC.GetAllInstances(viewType).OfType <UIElement>().FirstOrDefault();
if (cached != null)
{
ViewLocator.InitializeComponent(cached);
return(cached);
}
if (viewType.IsInterface || viewType.IsAbstract || !typeof(UIElement).IsAssignableFrom(viewType))
{
return(new TextBlock {
Text = string.Format("Cannot create {0}.", viewType.FullName)
});
}
var newInstance = (UIElement)Activator.CreateInstance(viewType);
var frameworkElement = newInstance as FrameworkElement;
if (frameworkElement != null)
{
var themeManager = (IThemeManager)this.GetInstance(typeof(IThemeManager), null);
frameworkElement.Resources.MergedDictionaries.Add(themeManager.GetThemeResources());
}
ViewLocator.InitializeComponent(newInstance);
return(newInstance);
}
protected virtual void OnNavigated(object sender, NavigationEventArgs e)
{
if (e.Uri.IsAbsoluteUri || e.Content == null)
{
return;
}
ViewLocator.InitializeComponent(e.Content);
var viewModel = ViewModelLocator.LocateForView(e.Content);
if (viewModel == null)
{
return;
}
var page = e.Content as Page;
if (page == null)
{
throw new ArgumentException("View '" + e.Content.GetType().FullName + "' should inherit from PhoneApplicationPage or one of its descendents.");
}
TryInjectQueryString(viewModel, page);
ViewModelBinder.Bind(viewModel, page, null);
var activator = viewModel as IActivate;
if (activator != null)
{
activator.Activate();
}
GC.Collect();
}
/// <summary>
/// Occurs after navigation
/// </summary>
/// <param name="sender"> The event sender. </param>
/// <param name="e"> The event args. </param>
protected virtual void OnNavigated(object sender, NavigationEventArgs e)
{
if (e.Uri.IsAbsoluteUri || e.Content == null)
{
return;
}
ViewLocator.InitializeComponent(e.Content);
var viewModel = ViewModelLocator.LocateForView(e.Content);
if (viewModel == null)
{
return;
}
var page = e.Content as Page;
if (page == null)
{
throw new ArgumentException("View '" + e.Content.GetType().FullName + "' should inherit from PhoneApplicationPage or one of its descendents.");
}
if (treatViewAsLoaded)
{
page.SetValue(View.IsLoadedProperty, true);
}
TryInjectQueryString(viewModel, page);
ViewModelBinder.Bind(viewModel, page, null);
var activator = viewModel as IActivate;
if (activator != null)
{
activator.Activate();
}
var viewAware = viewModel as ViewAware;
if (viewAware != null)
{
EventHandler onLayoutUpdate = null;
onLayoutUpdate = delegate
{
//viewAware.OnViewReady(page);
page.LayoutUpdated -= onLayoutUpdate;
};
page.LayoutUpdated += onLayoutUpdate;
}
GC.Collect();
}
private void FrameOnNavigated(object sender, NavigationEventArgs e)
{
ViewLocator.InitializeComponent(e.Content);
var viewModel = ViewModelLocator.LocateForView(e.Content);
if (viewModel == null)
{
return;
}
ParametersHelper.InjectParameter(viewModel, e.Parameter as IDictionary <string, object>);
ViewModelBinder.Bind(viewModel, e.Content as DependencyObject, null);
ScreenExtensions.TryActivate(viewModel);
this.Changed?.Invoke(this, new NavigationStepChangedEventArgs(viewModel));
}
public override void Load(Uri targetUri, Uri currentUri)
{
//tamper protection
Boolean isMatchRequired = targetUri.OriginalString.Contains(Constants.ADDNEW) && targetUri.OriginalString.Contains(Constants.TRACKING_KEY);
try
{
PersitableScreen viewmodel;
_conductor.ViewModels.TryGetValue(targetUri.OriginalString, out viewmodel);
if (isMatchRequired && viewmodel == null)
{
throw new InvalidOperationException("Uri missing from cache");
}
if (viewmodel != null)
{
Object result = viewmodel.GetView();
if (result is Uri)
{
base.Complete((Uri)result);
}
else
{
base.Complete(result);
}
}
else
{
_result = this.Loader.BeginLoad(targetUri, currentUri, (res) =>
{
try
{
LoadResult loadResult = this.Loader.EndLoad(res);
if (loadResult.RedirectUri != null)
{
base.Complete(loadResult.RedirectUri);
}
else
{
DependencyObject content = loadResult.LoadedContent as DependencyObject;
if (content != null)
{
String currentOriginalString = null;
if (currentUri == null || String.IsNullOrWhiteSpace(currentUri.OriginalString))
{
currentOriginalString = Constants.HOME_URI_STRING;
}
else
{
currentOriginalString = currentUri.OriginalString;
}
String targetUriString = targetUri.OriginalString;
String trackingKey = String.Empty;
if (targetUri.OriginalString.EndsWith(Constants.ADD_NEW_QUERYSTRING))
{
trackingKey = Guid.NewGuid().ToString();
targetUriString = String.Concat(targetUriString.Replace(Constants.ADD_NEW_QUERYSTRING, String.Empty), Constants.TRACKING_KEY_QUERYSTRING, trackingKey);
}
ViewLocator.InitializeComponent(content);
var vm = ViewModelLocator.LocateForView(content);
if (vm == null)
{
// to avoid shellviewmodel to be set on cild screens datacontext property
vm = new PersitableScreen();
}
viewmodel = vm as PersitableScreen;
if (viewmodel != null)
{
viewmodel.ViewType = content.GetType();
viewmodel.UriString = targetUriString;
viewmodel.ParentUriOriginalString = currentOriginalString;
viewmodel.TrackingKey = trackingKey;
// TODO: Add query string
Uri auri = new Uri("dummy://" + targetUriString, UriKind.Absolute);
string query = auri.Query;
// _conductor.NavigationService.TryInjectQueryString(viewmodel,content);
}
// dont rebind when you're bound to yourself
if (vm != content)
{
ViewModelBinder.Bind(vm, content, null);
}
base.Complete(content);
}
else
{
throw new InvalidOperationException("LoadedContent was null or not a DependencyObject");
}
return;
}
}
catch (Exception e)
{
base.Error(e);
return;
}
}, null);
}
}
catch (Exception e)
{
base.Error(e);
return;
}
}
