private void DeleteCategory(PhraseCategoryViewModel category)
{
if (category.Fixed)
{
ErrorMessage.Show("The phrase category '{0}' is required by the system, and cannot be deleted.", category.Category);
return;
}
if (this.Question(String.Format("Are you sure you want to delete the phrase category \"{0}\"?", category.Category), "Delete category?"))
{
RegisterPendingChange(new DeletePhraseCategoryCommand(category.Model));
category.IsDeleted = true;
}
}
private void ListPhrases(PhraseCategoryViewModel category)
{
if (category != null)
{
if (!_phraseCache.ContainsKey(category))
{
var model = new ObservableCollection <PhraseViewModel>(Service.GetPhrases(category.CategoryID).ConvertAll <PhraseViewModel>((p) => new PhraseViewModel(p)));
_phraseCache[category] = model;
}
lvwPhrases.ItemsSource = _phraseCache[category];
}
else
{
lvwPhrases.ItemsSource = null;
}
}
private void ShowCategoryContextMenu()
{
PhraseCategoryViewModel category = CurrentCategory;
if (category == null)
{
return;
}
ContextMenu menu = new ContextMenu();
MenuItemBuilder builder = new MenuItemBuilder();
menu.Items.Add(builder.New("Delete Category").Handler(() => { DeleteCategory(category); }).MenuItem);
menu.Items.Add(builder.New("Add New Category").Handler(() => { AddPhraseCategory(); }).MenuItem);
lvwCategories.ContextMenu = menu;
}
private void lvwCategories_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
CurrentCategory = lvwCategories.SelectedItem as PhraseCategoryViewModel;
ListPhrases(CurrentCategory);
}