public StudentCardFilePage()
{
InitializeComponent();
// Set a platform-specific Offset on the OverlapLayout.
overlapLayout.Offset = 2 * Device.GetNamedSize(NamedSize.Large, typeof(Label));
SchoolViewModel viewModel = new SchoolViewModel();
viewModel.PropertyChanged += (sender, args) =>
{
if (args.PropertyName == "StudentBody")
{
// Sort the students by last name.
var students =
viewModel.StudentBody.Students.OrderBy(student => student.LastName);
Device.BeginInvokeOnMainThread(() =>
{
int index = 0;
// Loop through the students.
foreach (Student student in students)
{
// Create a StudentView for each.
StudentView studentView = new StudentView
{
BindingContext = student
};
// Set the Order attached bindable property.
OverlapLayout.SetRenderOrder(studentView, index++);
// Attach a Tap gesture handler.
TapGestureRecognizer tapGesture = new TapGestureRecognizer();
tapGesture.Tapped += OnStudentViewTapped;
studentView.GestureRecognizers.Add(tapGesture);
// Add it to the OverlapLayout.
overlapLayout.Children.Add(studentView);
}
});
}
};
}
void OnStudentViewTapped(object sender, EventArgs args)
{
View tappedChild = (View)sender;
bool retractOnly = tappedChild == exposedChild;
// Retract the exposed child.
if (exposedChild != null)
{
overlapLayout.Children.Remove(exposedChild);
overlapLayout.Children.Insert(
OverlapLayout.GetRenderOrder(exposedChild), exposedChild);
exposedChild = null;
}
// Expose a new child.
if (!retractOnly)
{
// Raise child.
overlapLayout.Children.Remove(tappedChild);
overlapLayout.Children.Add(tappedChild);
exposedChild = tappedChild;
}
}
