Cannot set view background in python

ParaView Support
1

Hi all
I am trying to set the background colour from the python interface (from conda).
I’m doing something like:

for view in [renderView1, renderView2, renderView3, renderView4]:
    view.Background = [0.0, 0.0, 0.0]

ExportView("./blabla.pdf", view=renderView1)

ExportView("./blabla2.pdf", view=renderView2)

ExportView("./blabla3.pdf", view=renderView3)

ExportView("./blabla4.pdf", view=renderView4)

However, the exported pdfs still have the default grey background.

Any idea?

2

Does this work if you save as PNG instead? Saving as PDF would rasterize the image anyway if you save a RenderView.

3

Yes I have the same issue when exporting to png

I am able to export with a white background to pdf with the paraview gui

4

I tried

for view in [renderView1, renderView2, renderView3, renderView4]:
    view.Background = [0.0, 0.0, 0.0]
    SetActiveView(view)
    SetViewProperties(Background=[0.0, 0.0, 0.0])
    Render()
    SaveScreenshot("test.png", view)

And it didn’t work, the background is still grey

5

I made this MWE from one of the demos.

from paraview.simple import *

ss = Sphere(Radius=2, ThetaResolution=32)
shr = Shrink(Input=ss)

cs = Cone()

app = AppendDatasets()
app.Input = [shr, cs]

Show(app)

SetViewProperties(Background=[0.0, 0.0, 0.0])

Render()

SaveScreenshot("out.png")
ExportView("./out.pdf")

This is out.png. As you can see the background isn’t white
out

6 
SetViewProperties(
   Background=[0.0, 0.0, 0.0],
   UseColorPaletteForBackground = 0,
)
1 Like
7

@jourdain this seems to have worked!

Turns out I wanted it white but was asking for 0, 0, 0 which is black

Now the issue that I have is that the text is now invisible. Usually with a white background the text turns black. Is there another setting?

image

8

What about instead of SetViewProperties you use

LoadPalette(paletteName=‘WhiteBackground’)

I got that using

Tools / Start Trace

change the palette to White Background and then

Tools / Stop Trace

That should set all related colors properly.

1 Like
9

It worked thank you very much!