public void MoveItemDown()
{
if (SelectedTreeViewItem is CategoryViewModel)
{
CategoryViewModel vm = SelectedTreeViewItem as CategoryViewModel;
SubItems.MoveItemDown(vm);
}
else if (SelectedTreeViewItem is StoryViewModel)
{
StoryViewModel vm = SelectedTreeViewItem as StoryViewModel;
if (vm.Model.CategoryId == null)
{
SubItems.MoveItemDown(vm);
}
else
{
CategoryViewModel category = Categories.Single(i => i.Model.id == vm.Model.CategoryId);
category.Stories.MoveItemDown(vm);
}
}
else if (SelectedTreeViewItem is ChapterViewModel)
{
ChapterViewModel vm = SelectedTreeViewItem as ChapterViewModel;
vm.StoryVm.Chapters.MoveItemDown(vm);
}
else if (SelectedTreeViewItem is SceneViewModel)
{
SceneViewModel vm = SelectedTreeViewItem as SceneViewModel;
vm.ChapterVm.Scenes.MoveItemDown(vm);
}
}