private static void IsFocusedPropertyChanged(BindableObject bindable, object oldValue, object newValue)
{
var view = bindable.AsType <View>();
view.Focused -= ViewOnFocused;
view.Focused += ViewOnFocused;
view.Unfocused -= ViewOnFocused;
view.Unfocused += ViewOnFocused;
if (oldValue == newValue || newValue == null)
{
return;
}
bool isFocused;
if (bool.TryParse(newValue.ToString(), out isFocused) == false)
{
return;
}
if (isFocused)
{
view.Focus();
}
else
{
view.Unfocus();
}
}
private static async void AddTappedCommand(BindableObject bindable)
{
var view = bindable.AsType <View>();
command = GetTappedCommand(bindable);
if (view != null && command != null)
{
view.AddTappedCommand(command, GetTappedCommandParameter(bindable));
}
}
private static void ItemTappedChanged(BindableObject bindable, object oldValue, object newValue)
{
var listView = bindable.AsType <ListView>();
listView.ItemTapped += async(sender, args) =>
{
(newValue as ICommand)?.Execute(null);
await Task.Delay(TimeSpan.FromSeconds(2));
// Clear selection
listView.SelectedItem = null;
};
}
private static void IsAnimatedChanged(BindableObject bindable, object oldValue, object newValue)
{
// Add animation to the view
var view = bindable.AsType <View>();
view?.GestureRecognizers.Add(
new TapGestureRecognizer
{
Command = new Command(
async() =>
{
// Scale up and down
await view.ScaleTo(1.2, 50, Easing.CubicOut);
await view.ScaleTo(1, 50, Easing.CubicIn);
})
});
}