/// <summary>
/// CREATE GESTURE RECOGNIZERS FOR DRAG/DROP AND LONG PRESS
/// </summary>
void AddSensorGestures(sensor Sensor, UIView mainView)
{
////CREATE OFFSETS TO FOLLOW EACH SUBVIEW AS IT MOVES
nfloat dx = 0;
nfloat dy = 0;
Sensor.panGesture = new UIPanGestureRecognizer(() => {
if (Sensor.panGesture.State == UIGestureRecognizerState.Began)
{
//View.BringSubviewToFront(Sensor.snapArea);
mainView.BringSubviewToFront(Sensor.snapArea);
}
if ((Sensor.panGesture.State == UIGestureRecognizerState.Began || Sensor.panGesture.State == UIGestureRecognizerState.Changed) && (Sensor.panGesture.NumberOfTouches == 1))
{
// remove any previosuly applied snap behavior to avoid a flicker that will occur if both the gesture and physics are operating on the view simultaneously
if (snap != null)
{
animator.RemoveBehavior(snap);
}
//var p0 = Sensor.panGesture.LocationInView (View);
var p0 = Sensor.panGesture.LocationInView(mainView);
if (dx == 0)
{
dx = p0.X - Sensor.snapArea.Center.X;
}
if (dy == 0)
{
dy = p0.Y - Sensor.snapArea.Center.Y;
}
// this is where the offsets are applied so that the location of the image follows the point where the image is touched as it is dragged,
// otherwise the center of the image would snap to the touch point at the start of the pan gesture
var p1 = new CGPoint(p0.X - dx, p0.Y - dy);
Sensor.snapArea.Center = p1;
}
else if (Sensor.panGesture.State == UIGestureRecognizerState.Ended)
{
//View.SendSubviewToBack(Sensor.snapArea);
mainView.SendSubviewToBack(Sensor.snapArea);
// reset offsets when dragging ends so that they will be recalculated for next touch and drag that occurs
dx = 0;
dy = 0;
/// CHECK IF SENSOR WAS DROPPED IN LOW OR HIGH SECTION
AnalyserUtilities.updateLowHighArea(Sensor.panGesture.LocationInView(mainView), Sensor, lowHighSensors, this, mainView);
////FIGURE OUT WHERE TO SNAP THE SUBVIEW BASED ON IT'S LOCATION AND IDENTIFIER
AnalyserUtilities.LHSwapCheck(this, lowHighSensors, Convert.ToInt32(Sensor.snapArea.AccessibilityIdentifier), Sensor.panGesture.LocationInView(mainView), mainView);
}
else if (Sensor.panGesture.State == UIGestureRecognizerState.Failed)
{
Console.WriteLine("Touch has failed to be recognized for " + Sensor.snapArea.AccessibilityIdentifier + " area");
}
});
Sensor.holdGesture = new UILongPressGestureRecognizer(() => {
if (Sensor.holdGesture.State == UIGestureRecognizerState.Began)
{
}
});
}
