private void Autoscroll_AutoScroll(object sender, AutoScrollArgs e)
{
const double SCALE = .5d;
if (!_isActive || _currentAutoscrollAction == null)
{
return;
}
double scale = SCALE;
if (_currentAutoscrollAction.Value == CameraMovement.Pan_AutoScroll)
{
// Pan autoscroll is reverse direction, this has just been the convention forever, so is intuitive. But the
// other actions feel more like automated versions of the standard action, so shouldn't be reversed.
scale *= -1d;
}
// The autoscroll class calculates delta by comparing the current position (passed during mouse move)
// to the position at mouse down. All of these action methods compare what they think is the current
// mouse position with the previous mouse position. So I need to create a false point to hand to these
// action methods.
Point currentPosition = new Point(_previousPosition2D.X + (e.XDelta * scale), _previousPosition2D.Y + (e.YDelta * scale));
// Do the action
switch (_currentAutoscrollAction.Value)
{
case CameraMovement.Orbit_AutoScroll:
Vector3D currentPosition3Da = ProjectToTrackball(_eventSource.ActualWidth, _eventSource.ActualHeight, currentPosition);
OrbitCamera(currentPosition, currentPosition3Da);
break;
case CameraMovement.Pan_AutoScroll:
PanCamera(currentPosition);
break;
case CameraMovement.RotateAroundLookDirection_AutoScroll:
Vector3D currentPosition3Db = ProjectToTrackball(_eventSource.ActualWidth, _eventSource.ActualHeight, currentPosition);
RotateCameraAroundLookDir(currentPosition, currentPosition3Db);
break;
case CameraMovement.RotateInPlace_AutoScroll:
RotateCamera(currentPosition);
break;
case CameraMovement.Zoom_AutoScroll:
ZoomCamera(currentPosition);
break;
default:
throw new ApplicationException("Unknown CameraMovement: " + _currentAutoscrollAction.Value.ToString());
}
OnUserMovedCamera(new UserMovedCameraArgs(_currentAutoscrollAction.Value));
}
private void Autoscroll_AutoScroll(object sender, AutoScrollArgs e)
{
SlideCamera(e.XDelta / (-60d * 2d), e.YDelta / (-60d * 2d));
}