public void Stop()
{
//Cancel the tutorial
InTutorial = false;
layer.Remove(managedAdorner);
Window parent = UiHelper.FindVisualParent <Window>(managedElement, null);
managedAdorner = null;
managedElement = null;
//Update adorner
layer.Update();
//Remove the event
parent.KeyDown -= TutorialKeyDown;
}
public void Start(FrameworkElement element)
{
if (InTutorial)
{
Stop();
return;
}
//Check if we have a tutorial for this element
if (!AllControls.ContainsKey(element.Name))
{
return;
}
//If yes, continue
Steps = AllControls[element.Name];
//Make sure we have any steps
if (!Steps.Any())
{
return;
}
//If all passed, start the tutorial
InTutorial = true;
currentStep = 0;
//Get element's windows parent
managedElement = element;
Window parent = UiHelper.FindVisualParent <Window>(managedElement, null);
parent.KeyDown += TutorialKeyDown;
//Get the second grid, available just after the base adorner decorator.
Grid secondGrid = UiHelper.FindVisualChildren <Grid>
(UiHelper.FindVisualChildren <AdornerDecorator>(parent).First()).First();
layer = AdornerLayer.GetAdornerLayer(secondGrid);
//Create a new Adorner
managedAdorner = new TutorialAdorner(managedElement, secondGrid);
layer.Add(managedAdorner);
//We must dispatch the first update to make sure the arrange is ran
Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.Background,
new Action(() =>
{
//Update adorner
layer.Update();
}));
}
