protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.Frame> e)
{
base.OnElementChanged (e);
if (e.NewElement != null) {
_frame = e.NewElement as GesturedFrame;
if (_frame.HasSwipeRightToLeft)
NativeView.AddGestureRecognizer (new UISwipeGestureRecognizer (g => _frame.DoSwipeRightToLeft ()) { Direction = UISwipeGestureRecognizerDirection.Left });
if (_frame.HasSwipeLeftToRight)
NativeView.AddGestureRecognizer (new UISwipeGestureRecognizer (g => _frame.DoSwipeLeftToRight ()) { Direction = UISwipeGestureRecognizerDirection.Right });
if (_frame.HasSwipeBottomToTop)
NativeView.AddGestureRecognizer (new UISwipeGestureRecognizer (g => _frame.DoSwipeBottomToTop ()) { Direction = UISwipeGestureRecognizerDirection.Up });
if (_frame.HasSwipeTopToBottom)
NativeView.AddGestureRecognizer (new UISwipeGestureRecognizer (g => _frame.DoSwipeTopToBottom ()) { Direction = UISwipeGestureRecognizerDirection.Down });
if (_frame.HasTap)
NativeView.AddGestureRecognizer (new UITapGestureRecognizer (g => _frame.DoTap ()) { NumberOfTapsRequired = 1 });
if (_frame.HasLongTap)
NativeView.AddGestureRecognizer (new UILongPressGestureRecognizer (g => _frame.DoLongTap ()));
}
}
protected override void OnElementChanged(ElementChangedEventArgs<Frame> e)
{
base.OnElementChanged (e);
_frame = e.NewElement as GesturedFrame;
_gestureDetector = new GestureDetector (new InternalGestureCapture (_frame));
this.ChildViewAdded += (object sender, ChildViewAddedEventArgs e2) => {
e2.Child.Touch += (object sender2, TouchEventArgs e3) => _gestureDetector.OnTouchEvent (e3.Event);
};
}
public GestureFrameDemoPage ()
{
Title = "Coded Gesture Control";
// Setup the Gesture Area
GesturedFrame gestureArea = new GesturedFrame() { HeightRequest = 300 };
var boxAnimLayout = new AbsoluteLayout () { BackgroundColor = Color.FromHex ("FCFCFC") };
mainBox = new BoxView () { IsVisible = true, BackgroundColor = Color.Black };
boxAnimLayout.Children.Add (mainBox, new Rectangle (currentLeft, currentTop, boxSize, boxSize));
gestureArea.Content = boxAnimLayout;
const int movementAmount = 75;
gestureArea.OnSwipeLeftToRight += async (sender, args) => {
log.Add("Swipe to Right");
await MoveBox (movementAmount, 0);
};
gestureArea.OnSwipeRightToLeft += async (sender, args) => {
log.Add("Swipe to Left");
await MoveBox (-movementAmount, 0);
};
gestureArea.OnSwipeTopToBottom += async (sender, args) => {
log.Add("Swipe to Bottom");
await MoveBox (0, movementAmount);
};
gestureArea.OnSwipeBottomToTop += async (sender, args) => {
log.Add("Swipe to Top");
await MoveBox (0, -movementAmount);
};
gestureArea.OnTap += async (sender, args) => {
log.Add("Tap");
await ScaleBox (2);
};
gestureArea.OnLongTap += async (sender, args) => {
log.Add("Long Press");
await ScaleBox (1);
};
// Setup the Logger
var listView = new ListView
{
ItemsSource = log,
ItemTemplate = new DataTemplate(typeof (TextCell))
{
Bindings =
{
{TextCell.TextProperty, new Binding(".")},
}
}
};
RelativeLayout layout = new RelativeLayout ();
layout.Children.Add (gestureArea,
Constraint.Constant (0),
Constraint.Constant (0),
Constraint.RelativeToParent (p => p.Width),
Constraint.RelativeToParent (p => p.Height - 200));
layout.Children.Add (listView,
Constraint.Constant (0),
Constraint.RelativeToParent (p => p.Height - 200),
Constraint.RelativeToParent (p => p.Width),
Constraint.Constant(200));
Content = layout;
}