private void OnNextPicture()
{
if (!CanNextPicture())
{
return;
}
var index = SelectedViewPicModel.SelectedPicIndex;
if (index != ViewPictureModels.Count - 1)
{
SelectedViewPicModel = ViewPictureModels.ElementAt(index + 1);
}
else
{
LoadPostilInfosAsync(++_currentPageIndex, () => SelectedViewPicModel = ViewPictureModels.FirstOrDefault());
}
}
private void OnPreviousPicture()
{
if (!CanPreviousPicture())
{
return;
}
var index = SelectedViewPicModel.SelectedPicIndex;
if (index == 0 && _currentPageIndex != 0)
{
LoadPostilInfosAsync(--_currentPageIndex, () => SelectedViewPicModel = ViewPictureModels.LastOrDefault());
}
else
{
SelectedViewPicModel = ViewPictureModels.ElementAt(index - 1);
}
}