Line break not working in color key title

[IgorDouven]

Dear all,

I would like to add a line break in the title of the color key, but \n is not working anymore. Here is a MWE:

using Gadfly

Gadfly.spy(rand(50, 50), Guide.ColorKey(title="Some label"))

If I use title="Some \n label", the title in the plot becomes 'Some'. Is this a known problem? Is there a workaround?

[bjarthur]

text is not going to work like it did previously until we get pango fixed.

long term though we should work towards getting rid of non-julian dependencies.

in this particular case though, i'm not sure line breaks in SVG have ever worked. your example works for PDF.

see http://giovineitalia.github.io/Compose.jl/latest/tutorial/#Text-1

[IgorDouven]

Thanks, you're right: PDF works fine. However, I can't use PDF because it makes the background black (even if I explicitly ask for a white background -- is this problem known?, should I open another issue?). My workaround is to export via SVG and then to use cairosvg in the command line to convert to a pdf file.

[Mattriks]

The background opacity issue was resolved on master (#1208). Did you do Theme(background_color="white") or Theme(panel_fill="white") or Theme(panel_opacity=0.0)?

For the history of this issue see: GiovineItalia/Compose.jl#322 (comment)

[IgorDouven]

Thanks for pointing this out. I did the first. Using the second now and the problem is solved!

[Mattriks]

Going back to the original issue here, multiline text using escape characters is not supported out-of-the-box for SVG1.x . SVG2 has some text features including inline-size and shape-inside which will auto-wrap text, and these appear to be supported by Inkscape. Needs testing in Compose!

[tlnagy]

AFAIK, multiline text was never supported in Gadfly SVGs, probably because (as @Mattriks points out) it's not supported in the SVG1.x spec. I think we can add preliminary SVG2-esque features if Inkscape supports it and if it gracefully fails on SVG 1.x rendering engines.