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New option in the scalar bar to show displayed range values

Yohann Bearzi (Kitware) requested to merge yohann.bearzi/paraview:colorbar-minmax into master

The range values of the visible scalar fields can now be displayed on the scalar bar. To do so, click on Edit Color Map icon, then in the new menu, click on Edit color legend properties icon. If the checkbox Show Range is on, then the range will be printed next to the color bar.

The range printed is composed of a Min value, and a Max value. The Min value (resp. Max value) is the minimum (resp. maxmimum) value of all combined arrays that share the same name and are visible in the view (with an open eyeball in the pipeline browser).

The range values are updated each time vtkSMPVRepresentationProxy::ViewUpdated is called. To handle scalar bar separation, special treatment is needed in pqUseSeparateColorMapReaction

vtkContext2DScalarBarActor and vtkPVScalarBarRepresentation needed enhanced with new attributes ShowRange and / or MinRange and MaxRange

Fixes #21122 (closed)

Edited by Yohann Bearzi (Kitware)

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