title: SAPUI5 VizFrame: How to get the selected data points
body: <p>I used a VizFrame to display data in my project.
  The normal behaviour of the VizFrame when you select data in the graph you see a popover with the data of the selected point. When you select more than one point the content of the popover is something like in the screenshot: <a href="http://i.stack.imgur.com/iFaYX.png" rel="nofollow">popover content</a>.
  I tried using attaching myself to the SelectedData Event. The oControlEvent.mParameters contain the data nodes being currently selected for THAT event.</p>
  
  <p>For example: I click node A => the node A is in the oControlEvent.mParameters. => OK</p>
  
  <p>Then I click additionally on node B (so node A and B are selected) => only the node B is contained in the oControlEvent.mParameters. => not OK.</p>
  
  <p>What I need is the set of all nodes that are currently selected in the graph, not just the one that triggered the event. </p>
  
  <p>This information must be contained somewhere, as the Tooltip correctly shows "2 data nodes selected" after the user clicked B.</p>
  
  <p>Thanks for your help.</p>