public INavigationOperation TryShowAsync(IViewModel viewModel, IDataContext context,
IViewModelPresenter parentPresenter)
{
if (!CanShowViewModel(viewModel, context, parentPresenter))
{
return(null);
}
var tcs = new TaskCompletionSource <object>();
var operation = new NavigationOperation(tcs.Task);
context = context.ToNonReadOnly();
context.AddOrUpdate(NavigationConstants.ViewModel, viewModel);
var provider = viewModel.GetIocContainer(true).Get <INavigationProvider>();
provider.CurrentNavigationTask.TryExecuteSynchronously(_ =>
{
try
{
var task = provider.NavigateAsync(operation.ToOperationCallback(), context);
tcs.TrySetFromTask(task);
}
catch (Exception e)
{
tcs.TrySetException(e);
throw;
}
});
return(operation);
}
public virtual INavigationOperation TryShowAsync(IViewModel viewModel, IDataContext context,
IViewModelPresenter parentPresenter)
{
if (!MultiViewModel.ViewModelType.IsInstanceOfType(viewModel))
{
return(null);
}
bool data;
if (context.TryGetData(NavigationConstants.SuppressTabNavigation, out data) && data)
{
return(null);
}
if (!CanShowViewModel(viewModel, context, parentPresenter))
{
return(null);
}
if (MultiViewModel.ItemsSource.Any(vm => vm == viewModel))
{
MultiViewModel.SelectedItem = viewModel;
}
else
{
MultiViewModel.AddViewModel(viewModel, true);
}
var operation = new NavigationOperation();
CallbackManager.Register(OperationType.TabNavigation, viewModel, operation.ToOperationCallback(), context);
return(operation);
}
public INavigationOperation TryShowAsync(IViewModel viewModel, IDataContext context, IViewModelPresenter parentPresenter)
{
if (viewModel == this)
{
return(null);
}
var operation = new NavigationOperation();
var callback = operation.ToOperationCallback();
//Saving callback to view model state that will allow us to execute it even after app save\restore cycle.
_callbackManager.Register(NavigationType, viewModel, callback, context);
OnShowViewModel(viewModel);
return(operation);
}
public virtual INavigationOperation TryShowAsync(IViewModel viewModel, IDataContext context,
IViewModelPresenter parentPresenter)
{
Should.NotBeNull(viewModel, "viewModel");
if (ReferenceEquals(viewModel, _multiViewModel))
{
return(null);
}
bool data;
if (context.TryGetData(NavigationConstants.SuppressTabNavigation, out data) && data)
{
return(null);
}
if (!CanShowViewModel(viewModel, context, parentPresenter))
{
return(null);
}
MultiViewModel.AddViewModel(viewModel, true);
var operation = new NavigationOperation();
CallbackManager.Register(OperationType.TabNavigation, viewModel, operation.ToOperationCallback(), context);
return(operation);
}
public INavigationOperation TryShowAsync(IViewModel viewModel, IDataContext context,
IViewModelPresenter parentPresenter)
{
if (!CanShowViewModel(viewModel, context, parentPresenter))
return null;
var tcs = new TaskCompletionSource<object>();
var operation = new NavigationOperation(tcs.Task);
context = context.ToNonReadOnly();
context.AddOrUpdate(NavigationConstants.ViewModel, viewModel);
var provider = viewModel.GetIocContainer(true).Get<INavigationProvider>();
provider.CurrentNavigationTask.TryExecuteSynchronously(_ =>
{
try
{
var task = provider.NavigateAsync(operation.ToOperationCallback(), context);
tcs.TrySetFromTask(task);
}
catch (Exception e)
{
tcs.TrySetException(e);
throw;
}
});
return operation;
}
public virtual INavigationOperation TryShowAsync(IViewModel viewModel, IDataContext context,
IViewModelPresenter parentPresenter)
{
Should.NotBeNull(viewModel, "viewModel");
bool data;
if (context.TryGetData(NavigationConstants.SuppressTabNavigation, out data) && data)
return null;
if (!CanShowViewModel(viewModel, context, parentPresenter))
return null;
MultiViewModel.AddViewModel(viewModel, true);
var operation = new NavigationOperation();
CallbackManager.Register(OperationType.TabNavigation, viewModel, operation.ToOperationCallback(), context);
return operation;
}
public virtual INavigationOperation TryShowAsync(IViewModel viewModel, IDataContext context,
IViewModelPresenter parentPresenter)
{
Should.NotBeNull(viewModel, nameof(viewModel));
if (ReferenceEquals(viewModel, _multiViewModel))
return null;
bool data;
if (context.TryGetData(NavigationConstants.SuppressTabNavigation, out data) && data)
return null;
if (!CanShowViewModel(viewModel, context, parentPresenter))
return null;
if (MultiViewModel.ItemsSource.Contains(viewModel))
MultiViewModel.SelectedItem = viewModel;
else
MultiViewModel.AddViewModel(viewModel, true);
var operation = new NavigationOperation();
CallbackManager.Register(OperationType.TabNavigation, viewModel, operation.ToOperationCallback(), context);
return operation;
}
public INavigationOperation TryShowAsync(IViewModel viewModel, IDataContext context, IViewModelPresenter parentPresenter)
{
if (viewModel == this)
return null;
var operation = new NavigationOperation();
var callback = operation.ToOperationCallback();
//Saving callback to view model state that will allow us to execute it even after app save\restore cycle.
_callbackManager.Register(NavigationType, viewModel, callback, context);
OnShowViewModel(viewModel);
return operation;
}
