[vtkusers] Show tooltip

C P cp.vtk.user at googlemail.com
Fri Dec 2 08:56:03 EST 2016

Dear vtk users,

how can I show a tooltip at some 2D position on the screen? I checked the
vtkTooltipItem class but I do not know how to make it show something. I
cannot add it to the vtkRenderer like a 2D actors. I tired this but it
doesn't work (in Oython):

tooltip = vtk.vtkTooltipItem()
tooltip.SetText("some text")

How is it done? Thanks.

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