[vtkusers] How to enable vtkAxis::RIGHT in vtkChartXY (multiple Y-Axis)

[Eric E. Monson]

Hey Gerrit,

You can actually leave AutoAxes on. The way to get the extra axes to show up and use them for plots is to set the "plot corner". This nomenclature is a bit opaque to me, but the idea is that each chart has four possible corners. The default one is 0, which uses the left and bottom axes. Corner 1 uses bottom and right; 2 uses right and top and 3 uses top and left. 

So, after you've added a plot to the chart, you can call

chart->SetPlotCorner( chart->GetPlot(0), 1);

and this will switch it to using the bottom and right axes. I would think there would be an enum for the corner integers, but I couldn't fine one offhand. I haven't played around enough to see how this behaves with multiple plots that have different ranges, etc – only tried it out to see that the basic functionality works.

Talk to you later,
-Eric

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Eric E Monson
Duke Visualization Technology Group


On Jan 18, 2012, at 8:22 PM, Gerrit van Doorn wrote:

> OK, I figured out the trick was to disable AutoAxis:
>    chart->SetAutoAxes(false);
> 
> Now I'm still wondering if it is possible to draw a 2nd plot using the RIGHT Axis. Does anybody know if this is possible?
> 
> On Wed, Jan 18, 2012 at 2:24 PM, Gerrit van Doorn <gdoorn at newfieldwireless.com> wrote:
> Hi,
> 
> I'm trying to plot a second Y-Axis on the right side of a line/bar plot by enabling  vtkAxis::RIGHT (chart->GetAxis(vtkAxis::RIGHT)->SetVisible(true);)
> However, it doesn't show up. I also tried this on a line plot in ParaView (using the settings menu) but here it also doesn't display the Axis on the right side. Is there something I'm forgetting to do?
> Is it possible to plot 2 line graphs in the same chart with each their own Y-Axis?
> 
> I'm using VTK 5.8
> 
> Thanks,
> gerrit
> 
> 
> 
> -- 
> Gerrit van Doorn
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