private static async Task <TTarget> FrameNavigate <TTarget>(TTarget targetViewModel, Type type, Windows.UI.Xaml.Controls.Frame frame) where TTarget : class, IViewModel
{
var parameter = new StageNavigationContext <TTarget>()
{
ViewModel = targetViewModel
};
var t = new TaskCompletionSource <object>();
var dip = EventRouting.EventRouter.Instance
.GetEventChannel <NavigationEventArgs>()
.Where(e =>
object.ReferenceEquals(e.EventData.Parameter, parameter))
.Subscribe(e =>
{
var page = e.Sender as MVVMPage;
if (parameter.ViewModel != null)
{
page.ViewModel = parameter.ViewModel;
}
else
{
var solveV = page.GetDefaultViewModel();
if (solveV != null)
{
targetViewModel = parameter.ViewModel = (TTarget)solveV;
}
}
if (targetViewModel == null)
{
targetViewModel = (TTarget)page.ViewModel;
}
parameter.ViewModel = targetViewModel;
if (!t.Task.IsCompleted)
{
t.SetResult(null);;
}
});
frame.Navigate(type, parameter);
await t.Task;
dip.DisposeWith(targetViewModel);
return(targetViewModel);
}
private static async Task <TTarget> FrameNavigate <TTarget>(TTarget targetViewModel, Type type, Windows.UI.Xaml.Controls.Frame frame) where TTarget : class, IViewModel
{
var parameter = new StageNavigationContext <TTarget>()
{
ViewModel = targetViewModel
};
var t = new TaskCompletionSource <object>();
var dip = EventRouting.EventRouter.Instance
.GetEventChannel <NavigationEventArgs>()
.Where(e =>
object.ReferenceEquals(e.EventData.Parameter, parameter))
.Subscribe(e =>
{
Page page = null;
IView view = null;
switch (e.Sender)
{
case MVVMPage mvvmPage:
page = mvvmPage;
view = mvvmPage;
break;
case PageViewDisguise disguise:
page = disguise.AssocatedObject;
view = disguise;
break;
default:
break;
}
if (parameter.ViewModel != null)
{
view.ViewModel = parameter.ViewModel;
}
else
{
var solveV = view.GetDefaultViewModel();
if (solveV != null)
{
targetViewModel = parameter.ViewModel = (TTarget)solveV;
}
}
if (targetViewModel == null)
{
targetViewModel = (TTarget)view.ViewModel;
}
view.ViewModel = parameter.ViewModel = targetViewModel;
targetViewModel?.OnPageNavigatedTo(e.EventData);
t.TrySetResult(null);
});
frame.Navigate(type, parameter);
await t.Task;
dip.DisposeWith(targetViewModel);
return(targetViewModel);
}