public async Task ShowAsync(FrameworkElement view, string title = "", object parameter = null, DialogParameters dialogParameters = null, bool AlwaysActiveViewOnOpen = true, bool AlwaysDeactiveViewOnClose = true)
{
var customDialog = new CustomDialog();
if (dialogParameters == null)
{
dialogParameters = new DialogParameters();
}
FillParameters(customDialog, dialogParameters);
if (view == null)
{
throw new Exception("View not found");
}
customDialog.Child = view;
customDialog.Title = title;
var modal = view.DataContext as IModalDialog;
if (modal != null)
{
customDialog.Title = string.IsNullOrEmpty(title) ? modal.Title : title;
if (modal.AcceptCommand != null)
{
customDialog.AcceptCommandText = modal.AcceptLabel;
customDialog.AcceptCommand = modal.AcceptCommand;
}
if (modal.CancelCloseCommand != null)
{
customDialog.CancelCommandText = modal.CancelLabel;
customDialog.CancelCommand = modal.CancelCloseCommand;
}
}
modal = null;
var activatable = view.DataContext as INavigationAware;
if (activatable != null)
{
activatable.OnNavigatedTo(new NavigatedToEventArgs()
{
NavigationMode = Windows.UI.Xaml.Navigation.NavigationMode.New,
Parameter = parameter
},
null
);
}
var deactivator = view.DataContext as INavigationAware;
if (deactivator != null)
{
if (Window.Current != null)
{
var control = Window.Current.Content as UserControl;
if (control == null)
{
return;
}
var grid = control.Content as Grid;
if (grid == null)
{
Debug.WriteLine("Control must have a Grid as main container");
return;
}
var popups = grid.Children.OfType <Popup>();
if (popups != null && popups.Any())
{
var modalPopup = popups.FirstOrDefault(x => x.Name == "ModalPopup");
}
else
{
var modalPopup = createModalPopup(customDialog, grid, dialogParameters);
grid.Children.Add(modalPopup);
modalPopup.IsOpen = true;
var closedEvent = Observable.FromEventPattern(modalPopup, "Closed");
IDisposable subscriber = null;
subscriber = closedEvent.Subscribe(x =>
{
var container = customDialog.FindName("Container") as ContentControl;
if (container != null)
{
container.Content = null;
}
deactivator.OnNavigatingFrom(new NavigatingFromEventArgs()
{
NavigationMode = Windows.UI.Xaml.Navigation.NavigationMode.Back,
}, null, false);
DialogClosed?.Invoke(this, new DialogClosedEventArgs(Result, DialogCloseParameter));
deactivator = null;
container = null;
customDialog = null;
if (view != null)
{
((FrameworkElement)view).DataContext = null;
view = null;
}
GC.Collect();
subscriber.Dispose();
closedEvent = null;
});
}
}
}
}
