title: Differentiating the checkbox selection & row selection in dxDataGrid
body: <p>I implemented dxData grid with the following option.
   selection: {
      mode: 'multiple'
   }
  And also have a different functionality for onRowClick &amp; onSelectionChanged.</p>
  
  <p>While the onRowClick event is getting fired , It fires the onSelectionChanged event also.</p>
  
  <p>Can anyone suggest how to differntiate these two event?
  I mean when the row click event is getting fired, it should not file the onSelectionChanged event. The onSelectionChanged event should fire while selecting the check boxes.</p>
  
  <p>Thank you</p>