Colorbar of volume rendering on 3D view

Support
1

Hellow all,

I would like to make color bar of volume rendering plot on 3D view
The volume rendering function is costum maded for scientific data
(The code indicated below)

Is there any way to make this ?

def showVolumeRendering(volumeNode):

    volRenLogic = slicer.modules.volumerendering.logic()
    displayNode = volRenLogic.CreateDefaultVolumeRenderingNodes(volumeNode)

    propertyNode = displayNode.GetVolumePropertyNode()

    VolumeProperty = propertyNode.GetVolumeProperty()
    VolumeProperty.SetAmbient(0.95)
    VolumeProperty.SetDiffuse(0.15)
    VolumeProperty.SetSpecular(0.0)
    VolumeProperty.SetSpecularPower(1.0)

    array = slicer.util.arrayFromVolume(volumeNode)
    array_max = np.max(array)

    opacityTransfer = vtk.vtkPiecewiseFunction()
    opacityTransfer.AddPoint(0,0)
    opacityTransfer.AddPoint(array_max*0.15, 0.)
    opacityTransfer.AddPoint(array_max*0.3,0.07)
    opacityTransfer.AddPoint(array_max*0.5,0.07)
    opacityTransfer.AddPoint(array_max*0.6,0.07)
    opacityTransfer.AddPoint(array_max*0.7,0.1)
    opacityTransfer.AddPoint(array_max*0.85,0.35)
    opacityTransfer.AddPoint(array_max*0.99,1)
    opacityTransfer.AddPoint(array_max*1,0.01)

    ctf = vtk.vtkColorTransferFunction()
    ctf.AddRGBPoint(array_max*0.25, 0.1,0.1,1.0)
    ctf.AddRGBPoint(array_max*0.5, 0.2,1.0,0.2)
    ctf.AddRGBPoint(array_max*0.75, 1.0,0.5,0.0)
    ctf.AddRGBPoint(array_max*0.95, 1.0,0.0,0.0)

    propertyNode.SetColor(ctf)
    propertyNode.SetScalarOpacity(opacityTransfer)
2

See how to do this in examples in the script repository.