private async void OnSelectCategoryCommandExecuted(Grouping <Models.Category, Item> categoryGroup)
{
if (categoryGroup == null)
{
return;
}
if (categoryGroup.Key.Name.Equals("Home"))
{
await NavigationService.NavigateAsync("NavigationPage/HomePage");
return;
}
categoryGroup.Key.IsSelected = !categoryGroup.Key.IsSelected;
if (categoryGroup.Key.IsSelected)
{
var category = MenuService.Categories.FirstOrDefault(x => x.Key.Name == categoryGroup.Key.Name);
IEnumerable <Item> itemslist = category;
categoryGroup.AddRange(itemslist);
}
else
{
categoryGroup.Clear();
}
}
public static IEnumerable <IGrouping <int, T> > GroupAt <T>(this IEnumerable <T> source, int itemsPerGroup)
{
for (int i = 0; i < (int)Math.Ceiling((double)source.Count() / itemsPerGroup); i++)
{
var currentGroup = new Grouping <int, T> {
Key = i
};
currentGroup.AddRange(source.Skip(itemsPerGroup * i).Take(itemsPerGroup));
yield return(currentGroup);
}
}
