private void OnTouch(SKTouchEventArgs args, CameraComponent camera)
{
var argsActionType = args.ActionType;
var argsLocation = args.Location;
var argsId = args.Id;
var argsInContact = args.InContact;
_scene.RunDuringUpdate(
() =>
{
var worldPoint = camera.PixelToWorldMatrix.MapPoint(argsLocation);
switch (argsActionType)
{
case SKTouchAction.Pressed:
{
// start of a stroke
var p = new SKPath();
p.MoveTo(worldPoint);
_temporaryPaths[argsId] = p;
break;
}
case SKTouchAction.Moved:
{
// the stroke, while pressed
if (argsInContact && _temporaryPaths.TryGetValue(argsId, out var foundPath))
{
foundPath.LineTo(worldPoint);
}
break;
}
case SKTouchAction.Released:
{
// end of a stroke
if (_temporaryPaths.TryGetValue(argsId, out var foundPath))
{
_paths.Add(foundPath);
_temporaryPaths.Remove(argsId);
_camera1.ZoomTo(_paths.SelectMany(path => path.Points));
_camera2.ZoomTo(_paths.SelectMany(path => path.Points));
}
break;
}
case SKTouchAction.Cancelled:
{
// we don't want that stroke
_temporaryPaths.Remove(argsId);
break;
}
}
}
);
// we have handled these events
args.Handled = true;
}