public AllSubjects()
{
InitializeComponent();
SubjectList.BindingContext = subjectViewModel;
var sortTapGestureRecognizer = new TapGestureRecognizer();
sortTapGestureRecognizer.Tapped += (s, e) => {
if (currentSort == 1)
{
currentSort = 2; //z-a
SortIcon.Source = "azup.png";
subjectViewModel = new SubjectViewModel(subjectViewModel.SortZA());
SubjectList.BindingContext = subjectViewModel;
}
else if (currentSort == 2)
{
currentSort = 3; //5-0
SortIcon.Source = "stardown.png";
subjectViewModel = new SubjectViewModel(subjectViewModel.Sort50());
SubjectList.BindingContext = subjectViewModel;
}
else if (currentSort == 3)
{
currentSort = 4; //0-5
SortIcon.Source = "starup.png";
subjectViewModel = new SubjectViewModel(subjectViewModel.Sort05());
SubjectList.BindingContext = subjectViewModel;
}
else
{
currentSort = 1; //a-z
SortIcon.Source = "azdown.png";
subjectViewModel = new SubjectViewModel(subjectViewModel.SortAZ());
SubjectList.BindingContext = subjectViewModel;
}
};
SortIcon.GestureRecognizers.Add(sortTapGestureRecognizer);
}