public override void TouchesMoved(NSSet touches, UIEvent evt)
{
base.TouchesMoved(touches, evt);
if (touches.Count == 1)
{
var touch = touches.AnyObject as UITouch;
if (touch != null)
{
var currentPos = touch.LocationInView(this);
var previousPos = touch.PreviousLocationInView(this);
var cRect = new CGRect(new CGPoint((int)currentPos.X, (int)currentPos.Y), new CGSize(5, 5));
var pRect = new CGRect(new CGPoint((int)previousPos.X, (int)previousPos.Y), new CGSize(5, 5));
if (!cRect.IntersectsWith(pRect))
{
if (_previousTouchCount == touches.Count)
{
_map.Viewport.Transform(currentPos.X, currentPos.Y, previousPos.X, previousPos.Y);
RefreshGraphics();
}
}
}
}
else if (touches.Count == 2)
{
nfloat centerX = 0;
nfloat centerY = 0;
var locations = touches.Select(t => ((UITouch)t).LocationInView(this)).ToList();
foreach (var location in locations)
{
centerX += location.X;
centerY += location.Y;
}
centerX = centerX / touches.Count;
centerY = centerY / touches.Count;
var radius = Algorithms.Distance(centerX, centerY, locations [0].X, locations [0].Y);
var rotation = Math.Atan2(locations [1].Y - locations [0].Y, locations [1].X - locations [0].X) * 180.0 / Math.PI;
if (_previousTouchCount == touches.Count)
{
_map.Viewport.Transform(centerX, centerY, _previousX, _previousY, radius / _previousRadius);
_map.Viewport.Rotation += rotation - _previousRotation;
RefreshGraphics();
}
_previousX = centerX;
_previousY = centerY;
_previousRadius = radius;
_previousRotation = rotation;
}
_previousTouchCount = touches.Count;
}
public override void TouchesBegan(NSSet touches, UIEvent evt)
{
if (touches.Count == 2)
{
var locations = touches.Select(t => ((UITouch)t).LocationInView(this)).ToList();
_previousRotation = GetRotation(locations);
_innerRotation = _map.Viewport.Rotation;
}
_touchDown = GetScreenPosition(touches);
base.TouchesBegan(touches, evt);
}
public override void TouchesMoved(NSSet touches, UIEvent evt)
{
base.TouchesMoved(touches, evt);
if (touches.Count == 1)
{
if (touches.AnyObject is UITouch touch)
{
var currentPos = touch.LocationInView(this);
var previousPos = touch.PreviousLocationInView(this);
var cRect = new CGRect(new CGPoint((int)currentPos.X, (int)currentPos.Y), new CGSize(5, 5));
var pRect = new CGRect(new CGPoint((int)previousPos.X, (int)previousPos.Y), new CGSize(5, 5));
if (!cRect.IntersectsWith(pRect))
{
if (_previousTouchCount == touches.Count)
{
_map.Viewport.Transform(currentPos.X, currentPos.Y, previousPos.X, previousPos.Y);
RefreshGraphics();
}
}
}
}
else if (touches.Count == 2)
{
nfloat centerX = 0;
nfloat centerY = 0;
var locations = touches.Select(t => ((UITouch)t).LocationInView(this)).ToList();
foreach (var location in locations)
{
centerX += location.X;
centerY += location.Y;
}
centerX = centerX / touches.Count;
centerY = centerY / touches.Count;
var radius = Algorithms.Distance(centerX, centerY, locations[0].X, locations[0].Y);
if (_previousTouchCount == touches.Count)
{
_map.Viewport.Transform(centerX, centerY, _previousX, _previousY, radius / _previousRadius);
if (AllowPinchRotation)
{
var rotation = GetRotation(locations);
_innerRotation += rotation - _previousRotation;
_innerRotation %= 360;
if (_innerRotation > 180)
{
_innerRotation -= 360;
}
else if (_innerRotation < -180)
{
_innerRotation += 360;
}
if (_map.Viewport.Rotation == 0 && Math.Abs(_innerRotation) >= Math.Abs(UnSnapRotationDegrees))
{
_map.Viewport.Rotation = _innerRotation;
}
else if (_map.Viewport.Rotation != 0)
{
if (Math.Abs(_innerRotation) <= Math.Abs(ReSnapRotationDegrees))
{
_map.Viewport.Rotation = 0;
}
else
{
_map.Viewport.Rotation = _innerRotation;
}
}
_previousRotation = rotation;
}
RefreshGraphics();
}
_previousX = centerX;
_previousY = centerY;
_previousRadius = radius;
}
_previousTouchCount = touches.Count;
}
