[vtkusers] Displaying plot legends in Charts

[Marcus D. Hanwell]

On Fri, Apr 22, 2011 at 10:52 AM, Jenya Burstein <taijinian at gmail.com> wrote:
> Marcus,
>
> Thank you for the response.
>
> Which path would be easier?
>   - Add the interactivity behavior for vtkCharLegend;
>   - Create a vtk widget for vtkLegendBoxActor

Interactivity in vtkChartLegend.
>
> Another potential feature, that I am thinking ahead, is the ability to
> display multiple legends. For example, one legend box for colors and another
> separate box for symbol shapes. As far as I can tell, vtkChart, currently,
> doesn't support multiple legends. If it is possible to place a
> vtkLegendBoxActor into a vtkContextView, the multiple legend box feature
> would become instantly available.
>
The chart is actually just using the 2D context scene in VTK 5.8+, and
so you can add whatever you like to that scene (including additional
legends). This could be done in the vtkChartXY derived class for
example.

Marcus