private bool OpenFileInternal(string path, string filename, string ext)
{
if (_slideCollection != null)
{
CloseFileInternal();
}
SetFilename(path, filename, ext);
_slideCollection =
_storeController.RestoreSlideCollection(
CreateFullFilename(),
CodeFlowViewModel.Instance.HistoryController
);
var slide = _slideCollection.GetFirstOrNew();
CodeFlowViewModel.Instance.SetCurrentSlide((SlideView)ViewFactory.Instance.GetHierarchy(slide));
return(true);
}