[vtkusers] vtk zoom indicator

[K O ranjith]

Hello,
Thanks, it's  working.
Can I get the measured value (which is displayed as label axis) from
vtkLegendScaleActor object.

Ranjith KO

On Fri, Jun 23, 2017 at 7:52 PM, Sankhesh Jhaveri <
sankhesh.jhaveri at kitware.com> wrote:

> Take a look at vtkLegendScaleActor
> <http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/LegendScaleActor>.
> It uses vtkAxisActor
> <http://www.vtk.org/doc/nightly/html/classvtkAxisActor.html> internally.
>
> Hth,
> Sankhesh
> ​
>
> On Fri, Jun 23, 2017 at 1:55 AM K O ranjith <kor1581 at gmail.com> wrote:
>
>> I'm using vtk for developing a MRI DICOM Image viewer in Qt.
>> The viewer uses vtkDICOMImageReader,  vtkImageViewer2 & QVTKWidget.
>> I need to show a zoom indicator line which varies length with zoom value
>> and need not affect other operation like rotate, pan( which is used for
>> DICOM image in same window). It's position should be fixed at side of
>> viewer and should not alter with zoom, pan, rotate.
>> I added an line as an vtkactor  to the renderer using vtkLineSource.
>>  Its length altering  with zoom as I intended, but problem is its
>> position also altering with the zoom, also rotate and Pan affecting on it.
>> How can I make the position of the line fixed at side of the viewer.
>> Have any option in vtk for visual indication of zoom factor something
>> like vtkOrientationMarkerWidget for orientation...
>>
>>
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> --
> Sankhesh Jhaveri *Sr. Research & Development Engineer* | Kitware
> <http://www.kitware.com/> | (518) 881-4417
> ​
>
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