/// <summary>
/// Indicates that the view from this registration should be build and cached before it is actually shown
/// Displaying those views will be a lot faster, however this consumes more memory
/// </summary>
/// <param name="registrationInfo"></param>
/// <returns></returns>
public static NavigationRegistration Prebuild(
this NavigationRegistration registrationInfo)
{
registrationInfo.PreCreateInstance = true;
return(registrationInfo);
}
// todo: do we need this functionality?
internal static TViewModel RegisterView <TViewModel>(
Page page)
where TViewModel : class, IViewModel
{
var viewType = page.GetType();
var registrationInfo = new NavigationRegistration
{
ViewModelType = typeof(TViewModel),
ViewType = viewType
};
RegisterInternal(registrationInfo);
var cachedPage = new CachedPage(page);
PageCache.Add(cachedPage);
var viewModel = dependencyResolver.Resolve <TViewModel>();
if (viewModel != null)
{
TaskHelper.RunSync(
viewModel.InitializeAsync);
}
return(viewModel);
}
/// <summary>
/// Adds the given condition to the registration.
/// Every time a associated ViewModel is requested, the condition is evaluated before showing it.
/// </summary>
/// <param name="registration"></param>
/// <param name="condition"><see cref="Func{TResult}" />Condition to evaluate before showing</param>
/// <returns>Registration info</returns>
public static NavigationRegistration WithCondition(
this NavigationRegistration registration,
Func <bool> condition)
{
registration.Condition = condition;
return(registration);
}
/// <summary>
/// States that the specific registration is only relevant for the given platform(s)
/// </summary>
/// <param name="registrationInfo"></param>
/// <param name="platform"><see cref="CodeMonkeys.Navigation.Xamarin.Forms.DevicePlatforms"/> to register</param>
/// <returns>Registration info</returns>
public static NavigationRegistration OnPlatform(
this NavigationRegistration registrationInfo,
DevicePlatforms platform)
{
registrationInfo.Platform = platform;
return(registrationInfo);
}
/// <summary>
/// States that the specific registration is only relevant for the given platform(s)
/// </summary>
/// <param name="registrationInfo"></param>
/// <param name="platform">Xamarin.Forms platform to register</param>
/// <returns>Registration info</returns>
public static NavigationRegistration OnPlatform(
this NavigationRegistration registrationInfo,
string platform)
{
var devicePlatform = platform.ToDevicePlatform();
registrationInfo.Platform = devicePlatform;
return(registrationInfo);
}
public static NavigationRegistration WithClosingListener <TInterested>(
this NavigationRegistration registrationInfo)
where TInterested : IInterestedInClosing
{
registrationInfo.InterestedType = typeof(TInterested);
return(registrationInfo);
}
/// <summary>
/// Register a ViewModel interface to a specific view
/// </summary>
/// <typeparam name="TViewModelInterface">Type of the ViewModel interface</typeparam>
/// <typeparam name="TView"></typeparam>
/// <param name="navigationService">Type of the associated view</param>
/// <param name="preCreateInstance">Indicates wether an instance of the view should be created and cached before it is displayed</param>
/// <returns><see cref="CodeMonkeys.Navigation.Xamarin.Forms.Models.NavigationRegistration"/></returns>
public static NavigationRegistration Register <TViewModelInterface, TView>(
this INavigationService navigationService)
where TViewModelInterface : class, IViewModel
where TView : Page
{
var registrationInfo = new NavigationRegistration <TViewModelInterface, TView>();
navigationService.Register(registrationInfo);
return(registrationInfo);
}
/// <summary>
/// Register a ViewModel interface to a specific view
/// </summary>
/// <typeparam name="TViewModelInterface">Type of the ViewModel interface</typeparam>
/// <param name="navigationService">Navigation service instance</param>
/// <param name="typeOfView">Type of the associated view</param>
/// <param name="preCreateInstance">Indicates wether an instance of the view should be created and cached before it is displayed</param>
/// <returns><see cref="CodeMonkeys.Navigation.Xamarin.Forms.Models.NavigationRegistration"/></returns>
public static NavigationRegistration Register <TViewModelInterface>(
this INavigationService navigationService,
Type typeOfView)
where TViewModelInterface : class, IViewModel
{
var navigationRegistration = new NavigationRegistration
{
ViewModelType = typeof(TViewModelInterface),
ViewType = typeOfView
};
navigationService.Register(navigationRegistration);
return(navigationRegistration);
}