private DialogScreenResult ShowModal(IScreenFactory <IScreenBase> screenFactory)
{
_modal = true;
DialogLifecycle dialogLifecycle = null;
try {
_screen = screenFactory.Create(
_aggregator,
s => {
dialogLifecycle = new DialogLifecycle(s);
s.Children.Add(dialogLifecycle);
}
);
Initialize();
try {
_windowService.ShowWindow(_window, modal: true);
} catch (Exception ex) {
// If an exception is thrown in the UI code of the dialog window (e.g. in
// a command handler or on a Dispatcher action), ShowDialog rethrows this
// exception but leaves the Window open and visible.
if (!ex.IsCritical() && _window.IsVisible)
{
CloseWindowImmediatately();
}
// It's possible that 'HandleClose' or 'HandleWindowClosed' was already executed
// but 'ShowDialog' still threw an exception. In that case we have to check the
// current state of the screen to prevent invalid state transitions.
// TODO: Write a Unit Test when it's known how to reproduce it!
CloseScreen(checkState: true);
throw;
}
if (_lastWindowHandlerException != null)
{
throw _lastWindowHandlerException;
}
return(dialogLifecycle.ScreenResult ?? new DialogScreenResult(false));
} finally {
Disconnect();
if (_screen != null)
{
_screen
.Children
.Remove(dialogLifecycle);
}
if (_window.Owner != null)
{
// Fix for http://stackoverflow.com/questions/3144004/wpf-app-loses-completely-focus-on-window-close
_window.Owner.Activate();
}
}
}
public TestScreenResult ShowDialog <TScreen>(
IScreenFactory <TScreen> screen
) where TScreen : IScreenBase
{
IScreenBase s = screen.Create(_aggregator);
var lifecycle = new DialogLifecycle(s);
s.Children.Add(lifecycle);
s.Children.Add(new ScreenCloseHandler(_ => { })); // TODO: Remove code duplication between here and responder
return(new TestScreenResult(lifecycle));
}
internal TestScreenResult(DialogLifecycle lifecycle)
{
dialogLifecycle = lifecycle;
}
