Thank you for writing back.
I have logged a feature request for developing a lasso selection controller
. Once implemented you should be able to perform a selection with a lasso rectangle without actually zooming the viewport. The item is logged on our feedback portal
, here: ADD. RadChartView - implement LassoSelection controller
. I have also updated your Telerik Points
for the report.
Until the feature becomes available, you can use the attached custom implementation. You will need to create a custom controller, paint the lasso rectangle and in the MouseUp event check which data points are within the rectangle. Then you can raise an event from within the controller and handle it in your form.
I hope this helps. Let me know if you need further assistance.