public override Fragment GetItem(int position)
{
var wizardStep = WizardFlow.GetSteps()[position];
StateManager.LoadStepContext(wizardStep);
return(wizardStep);
}
public WizardPagerAdapter(FragmentManager fragmentManager, WizardFlow wizardFlow, IStateManager stateManager, Wizard wizard)
: base(fragmentManager)
{
WizardFlow = wizardFlow;
StateManager = stateManager;
Wizard = wizard;
}
public WizardPagerAdapter(FragmentManager fragmentManager, WizardFlow wizardFlow, IStateManager stateManager, Wizard wizard)
: base(fragmentManager)
{
WizardFlow = wizardFlow;
StateManager = stateManager;
Wizard = wizard;
}
/// <summary>
/// Called once the fragment is associated with its activity.
/// </summary>
/// <param name="activity"></param>
public override void OnAttach(Android.App.Activity activity)
{
base.OnAttach(activity);
WizardFlow = OnSetup(); //Require the user to Setup the Wizard flow when the fragment is attached
if (WizardFlow == null)
throw new ArgumentException("Error setting up the Wizard's flow. You must override WizardFragment.OnSetup and create a WizardFlow using the WizardFlow.Builder.");
}
/// <summary>
/// Called once the fragment is associated with its context.
/// </summary>
/// <param name="context"></param>
public override void OnAttach(Context context)
{
base.OnAttach(context);
WizardFlow = OnSetup(); //Require the user to Setup the Wizard flow when the fragment is attached
if (WizardFlow == null)
{
throw new ArgumentException("Error setting up the Wizard's flow. You must override WizardFragment.OnSetup and create a WizardFlow using the WizardFlow.Builder.");
}
}
/// <summary>
/// Constructs the Wizard
/// </summary>
/// <param name="wizardFlow">WizardFlow instance. See WizardFlow.Builder for more information on creating WizardFlow objects</param>
/// <param name="contextManager"></param>
/// <param name="callbacks"></param>
/// <param name="fragmentManager"></param>
public Wizard(WizardFlow wizardFlow,
IStateManager stateManager,
FragmentManager fragmentManager)
{
this.WizardFlow = wizardFlow;
this.StateManager = stateManager;
this.FragmentManager = fragmentManager;
FragmentManager.BackStackChanged += (o, sender) =>
{
if (FragmentManager.BackStackEntryCount < ViewPager.CurrentItem) //Backbutton has been pressed
{
ViewPager.SetCurrentItem(ViewPager.CurrentItem - 1, true /*smoothScroll*/); // Go to the previous item on the stack
}
};
MessageBus.GetInstance().Register(this, typeof(StepCompletedEvent)); //Listen for the StepCompeltedEvent on the buss
}
public void Receive <T>(T eventArgs)
{
var stepCompletedEvent = eventArgs as StepCompletedEvent;
if (stepCompletedEvent == null || stepCompletedEvent.WizardStep != CurrentStep)
{
return;
}
// Check that the step is not already in this state to avoid spamming the viewpager
if (WizardFlow.IsStepCompleted(ViewPager.CurrentItem) == stepCompletedEvent.IsStepCompleted)
{
return;
}
WizardFlow.SetStepCompleted(ViewPager.CurrentItem, stepCompletedEvent.IsStepCompleted);
ViewPager.Adapter.NotifyDataSetChanged(); //Notifies the attached observers that the underlying data has been changed and any View reflecting the data set should refresh itself.
if (StepChanged != null) //Trigger the Event handler.. may be used to refresh the UI
{
StepChanged();
}
}
private void ProcessStepBeforeChange(WizardStep wizardStep, int position)
{
wizardStep.OnExit(StepExitCode.ExitNext);
WizardFlow.SetStepCompleted(position, true);
StateManager.PersistStepContext(wizardStep);
}