public virtual bool Navigate(NavigatingCancelEventArgsBase args, IDataContext context)
{
Should.NotBeNull(args, "args");
if (!args.IsCancelable)
{
return(false);
}
var eventArgs = (NavigatingCancelEventArgs)args;
//Close button pressed.
if (eventArgs.IsBackButtonNavigation && XamarinFormsExtensions.SendBackButtonPressed != null)
{
var sendBackButton = XamarinFormsExtensions.SendBackButtonPressed(CurrentContent as Page);
if (sendBackButton != null)
{
RaiseNavigated(null, null, NavigationMode.Back);
sendBackButton();
return(true);
}
}
if (eventArgs.NavigationMode == NavigationMode.Back)
{
GoBack();
return(true);
}
// ReSharper disable once AssignNullToNotNullAttribute
return(Navigate(eventArgs.Mapping, eventArgs.Parameter, context));
}
private static PlatformInfo GetPlatformInfo()
{
Assembly assembly = TryLoadAssembly(BindingAssemblyName, null);
if (assembly == null)
{
if (Device.OS == TargetPlatform.WinPhone)
{
assembly = TryLoadAssembly(WinRTAssemblyName, null);
}
if (assembly == null)
{
return(XamarinFormsExtensions.GetPlatformInfo());
}
}
TypeInfo serviceType = typeof(IPlatformService).GetTypeInfo();
serviceType = assembly.DefinedTypes.FirstOrDefault(serviceType.IsAssignableFrom);
if (serviceType != null)
{
_platformService = (IPlatformService)Activator.CreateInstance(serviceType.AsType());
BindingServiceProvider.ValueConverter = _platformService.ValueConverter;
}
return(_platformService == null
? XamarinFormsExtensions.GetPlatformInfo()
: _platformService.GetPlatformInfo());
}
private static void OnViewCleared(IViewManager viewManager, IViewModel viewModel, object arg3, IDataContext arg4)
{
try
{
XamarinFormsExtensions.ClearBindingsRecursively(arg3 as BindableObject, true, true);
}
catch (Exception e)
{
Tracer.Error(e.Flatten(true));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="XamarinFormsBootstrapperBase" /> class.
/// </summary>
protected XamarinFormsBootstrapperBase()
{
var assembly = TryLoadAssembly(BindingAssemblyName, null);
if (assembly != null)
{
var serviceType = typeof(IPlatformService).GetTypeInfo();
serviceType = assembly.DefinedTypes.FirstOrDefault(serviceType.IsAssignableFrom);
if (serviceType != null)
{
_platformService = (IPlatformService)Activator.CreateInstance(serviceType.AsType());
}
}
_platform = _platformService == null
? XamarinFormsExtensions.GetPlatformInfo()
: _platformService.GetPlatformInfo();
}
private static void OnViewCleared(IViewManager viewManager, IViewModel viewModel, object arg3, IDataContext arg4)
{
XamarinFormsExtensions.ClearBindingsRecursively(arg3 as BindableObject, true, true);
}
