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I have a complex Graphics3D and would like to include a BarLegend, such as:

mylegend =
 BarLegend[{Hue[#] &, {0, 1}},
 LegendFunction -> "Frame",
 LegendLabel -> Text[Style["time (s)", 16]]]

I then Insert and place it into the full figure this way:

Show[
 Graphics3D[{Sphere[],
   Inset[barLegend, {1, 1, 1}]}]]

enter image description here

This is almost what I seek. I would like mylegend to have a solid background color to thus obscure the 3D graphics behind it, including the frame.

I could use Placed and Framed and Background and work hard to achieve this. It would be so much simpler if a framed legend had the option of a background color, but as far as I can see from the documentation, it doesn't. Obvious attempts such as to following do not work:

BackgroundColor -> Yellow

Background -> Yellow

Style -> {Black, Background -> Yellow}

etc.

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2 Answers 2

5
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Perhaps this is what you are looking for.

barlegend =
  BarLegend[{Hue[#] &, {0, 1}},
    LegendFunction -> (Panel[#, Background -> Yellow] &),
    LegendLabel -> Text[Style["time (s)", 16]]]

Graphics3D[{Sphere[], Inset[barlegend, {1, 1, 1}]}]

graphics

Update

The following will force the legend to be drawn after the graphics box, but only allows positioning in the 2D coordinate of the graphics viewport.

Graphics3D[Sphere[],
  Epilog -> Inset[barlegend, Scaled[{.8, .6}]]]

graphics

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4
  • $\begingroup$ Very very curious. Indeed, the yellow background obscures the sphere (thanks), but look carefully: The "back" of the frame is visible through the legend! What is going on?! $\endgroup$ Mar 23, 2017 at 0:31
  • $\begingroup$ @DavidG.Stork. That is because the frame is drawn after the legend. $\endgroup$
    – m_goldberg
    Mar 23, 2017 at 0:33
  • $\begingroup$ So is there any way to "occlude" the frame by the legend? $\endgroup$ Mar 23, 2017 at 0:42
  • $\begingroup$ m_goldberg: Hooray... Thanks very much. That works. $\endgroup$ Mar 23, 2017 at 1:08
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In general you could do something like

{BarLegend["Rainbow", LabelStyle -> {Background -> LightBlue}],
 BarLegend["Rainbow", LabelStyle -> {Background -> LightBlue}], 
LegendFunction -> "Frame"}

enter image description here

But then you have little control of finer details, like that white gap between background and frame. So to help you with "hard work", I just adopt relevant example listed in docs page for the function BarLegend. That example in docs is basically telling you "this is how you currently suppose to do it".

frame[legend_] := Framed[legend, FrameStyle -> Red, 
RoundingRadius -> 10, FrameMargins -> 10, Background -> LightGreen]

mylegend = BarLegend[{Hue[#] &, {0, 1}}, 
LegendFunction -> frame, LegendLabel -> Text[Style["time (s)", 16]]]

enter image description here

Show[Graphics3D[{Sphere[], Inset[mylegend, {1, 1, 1}]}]]

enter image description here

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  • $\begingroup$ Thanks @Vitaliy, but when I Insert your barlegend into a Graphics3D figure, for some reason it remains transparent and you can see the 3D figure (such as the frame) "through" it, as you can see from your figure. $\endgroup$ Mar 23, 2017 at 0:29
  • $\begingroup$ @DavidG.Stork it works for me on mac in 11.1 as you can see from image i added to my reply. You are probably on WIN. This is probably related to an issue that is currently is being fixed and in future it will work. $\endgroup$ Mar 23, 2017 at 0:32
  • $\begingroup$ I'm using v. 10.4 on a Mac. Regardless, on this website your bar legend does not obscure or occlude the frame as I hope to achieve. $\endgroup$ Mar 23, 2017 at 0:39

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