private void RenderCurrentPage()
{
// Get Layers of the current page from Lesson model
// to expose them to the view model of the LayerStack
LayerStack.SetLayers();
var currentPagePath = Data.GetPageFile(Data.Instance.Lesson.Name, CurrentPageIndex);
CurrentPage = BitmapHelper.Load(currentPagePath);
}
internal override void ChangeCurrentPage(int newPageIndex = -1)
{
if (newPageIndex == -1)
{
newPageIndex = LayerStack.holderModel.Contents.Count - 1;
}
if (CurrentPageIndex == newPageIndex || newPageIndex < 0 || newPageIndex >= PageCount)
{
return;
}
if (Data.Instance.Lesson.Exercises.Contents[newPageIndex].Layers.Count > 1 &&
Data.Instance.Lesson.Exercises.Contents[newPageIndex].GetType() == typeof(ExerciseContent) &&
Data.Instance.Lesson.Exercises.Contents[newPageIndex].GetType() != typeof(QuizContent) &&
!Data.Instance.User.IsTeacher)
{
LayerStack.CurrentLayerIndex = 1;
}
else
{
LayerStack.CurrentLayerIndex = 0;
}
CurrentPageIndex = newPageIndex;
LayerStack.SetLayers();
// Scrolls to current thumb inside the SideBar
var currentThumb =
thumbsContainerComponent.ItemContainerGenerator.ContainerFromIndex(CurrentPageIndex) as ContentPresenter;
if (currentThumb == null)
{
return;
}
currentThumb.BringIntoView();
RaisePropertyChanged("CanCollect");
RaisePropertyChanged("CanAnswer");
RaisePropertyChanged("CanBeStart");
}