[vtkusers] vtkChartXY picking

[Richard Brown]

Hi Jeff,

So if I want my left button to select the point underneath it (I think the right button by default creates a box and selects points within that box but then does nothing with them…) and then, for example, print the information pertaining to that point, how would I go about that?

SetButtonToAction(vtkChartXY::SELECT, vtkContextMouseEvent::LEFT_MOUSE);

Do I then set up an observer for vtkChartXY::SELECT?

And from there, when I’m in the callback function, how do I get the information of the selected point?

Thanks in advance,
Richard


> On 18 Apr 2016, at 13:54, Jeff Baumes <jeff.baumes at kitware.com> wrote:
> 
> I think you want SetActionToButton() on vtkChart to change mouse bindings. You should be able to listen for a selection event once that is set up.
> 
> http://www.vtk.org/doc/nightly/html/classvtkChart.html#ac4162187f5f3ad97f0163a079e06f13d <http://www.vtk.org/doc/nightly/html/classvtkChart.html#ac4162187f5f3ad97f0163a079e06f13d>
> On Fri, Apr 15, 2016 at 9:13 AM mbcx9rb9 <richard.j.brown at live.co.uk <mailto:richard.j.brown at live.co.uk>> wrote:
> Hi all,
> 
> I'd like to create a custom interactor for vtkChartXY (inherited from
> vtkContextInteractorStyle), but I can't figure out how to select single
> points with the left click of the mouse. Once I manage to that, I would need
> to return the index of the selected point.
> 
> This seems very straightforward to me, but I haven't seen any concrete
> examples.
> 
> Any pointers would be greatly appreciated.
> 
> Regards,
> Richard
> 
> 
> 
> 
> 
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