/// <summary>
/// Static constructor
/// </summary>
static DialogTask()
{
// Create a special 'Killed' dialog task by creating and running a normal dialog task.
using (var cts = new CancellationTokenSource())
{
Killed = new DialogTask(cts.Token);
Killed.Start();
}
}
private DialogTask Show
(
object viewModel,
IViewProvider viewProvider,
IEnumerable <ButtonConfiguration> buttonConfigurations,
DialogDisplayLocation displayLocation,
DialogDisplayBehavior displayBehavior,
DialogOptions dialogOptions,
CancellationToken cancellationToken
)
{
if (cancellationToken.IsCancellationRequested)
{
return(DialogTask.Killed);
}
DialogTask dialogTask = null;
Application.Current.Dispatcher.Invoke(() =>
{
var view = viewProvider.GetViewInstance(viewModel);
// Find the matching handler for the display location.
var dialogHandler = _dialogHandlers.GetDialogHandler(displayLocation);
// Tell it to show the content.
dialogTask = dialogHandler.ShowView(view, buttonConfigurations, displayBehavior, dialogOptions, cancellationToken);
});
if (dialogTask is null)
{
return(null);
}
if (cancellationToken.IsCancellationRequested)
{
return(DialogTask.Killed);
}
dialogTask.Start();
return(dialogTask);
}
public Dialog
(
Visual contentView,
ICollection <Button> buttons,
Action <DialogResult> closeCallback,
DialogOptions options,
CancellationToken externalCancellationToken
)
{
// Save parameters.
_closeCallback = closeCallback;
this.ContentView = contentView;
this.Buttons = buttons;
this.Options = options;
this.ExternalCancellationToken = externalCancellationToken;
// Initialize fields.
_cancellationTokenSource = new CancellationTokenSource();
_dialogTaskFactory = new DialogTaskFactory();
this.DialogTask = _dialogTaskFactory.Create(closeCallback, _cancellationTokenSource.Token);
}