async Task DoShow(CancellationToken cancellationToken)
{
if (IsCoaching)
{
throw new InvalidOperationException("Coaching is under process.");
}
CancellationToken = cancellationToken;
SkipTapped = false;
CurrentStep currentStep = null;
try
{
// Create and show background which contains the next and skip button
await AddButtons(cancellationToken);
for (Index = 0; Index < stepsList.Count; Index++)
{
var step = stepsList[Index];
FixButtonsConditions();
if (ShouldItTerminate())
{
return;
}
// Show the step by showing it text and element.
currentStep = await ShowStep(step);
if (ShouldItTerminate())
{
return;
}
// Wait for next, skip or time delay (If applicable) to continue.
if (Settings.MoveOnByTime)
{
await Task.WhenAny(OnNextTapped.Task, OnSkipTapped.Task, OnBackTapped.Task, currentStep.OnPopOverClosed.Task, Task.Delay(Settings.Delay));
}
else
{
await Task.WhenAny(OnNextTapped.Task, OnSkipTapped.Task, OnBackTapped.Task, currentStep.OnPopOverClosed.Task);
}
if (ShouldItTerminate())
{
return;
}
// Hide the step by showing it text and element.
await HideStep(currentStep);
}
}
finally
{
await Task.WhenAll(RemoveButtons(), HideStep(currentStep));
}
}
async Task HideStep(CurrentStep currentStep)
{
if (currentStep == null)
{
return;
}
await currentStep.Hide();
}
async Task <CurrentStep> ShowStep(Step step)
{
OnNextTapped = new TaskCompletionSource <bool>();
OnSkipTapped = new TaskCompletionSource <bool>();
OnBackTapped = new TaskCompletionSource <bool>();
var currentStep = new CurrentStep(step.Element, step.Text, Settings);
await currentStep.Show();
return(currentStep);
}