font family and color in guide.annotation

[IgorDouven]

I'm using Guide.annotation to add some text to a plot. As far as I can see, both the font family is different from the one Gadfly uses by default and also the color of the font is different (black instead of gray). I tried correcting the former by using font("Helvetica Neue"), but that doesn't seem to do anything. And I wasn't able to find out how I can change the font color (if that can be done at all; changing the font size of the annotation works fine). I'd be grateful for any advice.

[Mattriks]

Gadfly plots are drawn using the graphics package Compose.jl.
There are some examples of text in Compose here and here. Also in the Gadfly docs for Geom.abline
(p1 uses Guide.annotation).

The font() property should work, assuming that font is available. Compose font defaults:
https://github.com/GiovineItalia/Compose.jl/blob/a081070de98b7c5d46bc4a0aaf19426a71489b8d/src/Compose.jl#L119.

Gadfly font defaults:

Gadfly.jl/src/theme.jl

Line 3 in aa4855c

const title_font_desc = "'PT Sans','Helvetica Neue','Helvetica',sans-serif"

.

[IgorDouven]

Thank you, that's very helpful. I can't find here how to change the font color (in particular, how to make that match the color of the other labels in the plot). Is that possible? If not, that's not a big problem. But it would be nice to have this option. Op ma 30 sep. 2019 om 10:01 schreef Mattriks <notifications@github.com>:

…

Gadfly plots are drawn using the graphics package Compose.jl <https://github.com/GiovineItalia/Compose.jl>. There are some examples of text in Compose here <http://giovineitalia.github.io/Compose.jl/latest/tutorial/#Text-1> and here ***@***.***)-1>. Also in the Gadfly docs for Geom.abline ***@***.***)-1> (p1 uses Guide.annotation). The font() property should work, assuming that font is available. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#1323?email_source=notifications&email_token=AIFACLHR233JRHQP4DPYQDLQMGW45A5CNFSM4I3XJCAKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD74ZE2Y#issuecomment-536449643>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AIFACLHP2Z5WNK7HEMGZW4LQMGW45ANCNFSM4I3XJCAA> .

[Mattriks]

For Gadfly, the text properties (including color) for plot labels are found here. Does that solve "not matching the color of the other labels"? If not, please provide example code of what you are doing.

[IgorDouven]

Well, I could of course change the color of the "other" labels to black. Then the color would match the labels generated via compose. But then they would no longer match with the colors of the labels in all the other figures in the paper. (Of course, I could change them to black as well, but ...)

I don't have any special use case in mind. A MWE of what I'm doing is this:

using Gadfly, Compose

xcoords=rand(50)
ycoords=rand(50)
cols=rand(50)

Gadfly.plot(x=xcoords, y=ycoords, color=cols, Geom.point, Guide.title("Title"),
    Guide.annotation(compose(context(), Compose.text(0.4115, 0.89, "XXX"), fontsize(10pt), font("Helvetica-Neue"))))

The label XXX appears in a darker font than the other ones.

[Mattriks]

In this example, I've changed the font color of the Compose.text to Gadfly's major_label_font color.

using Colors
p1 = plot(x=xcoords, y=ycoords, color=cols, Geom.point, Guide.title("Title"),
    Guide.annotation(compose(context(), Compose.text(0.4115, 0.89, "XXX"), fontsize(10pt),
            font("Helvetica-Neue"), fill("black"), stroke(nothing)) ))
p2 = plot(x=xcoords, y=ycoords, color=cols, Geom.point, Guide.title("Title"),
    Guide.annotation(compose(context(), Compose.text(0.4115, 0.89, "XXX"), fontsize(10pt),
            font("Helvetica-Neue"), fill(colorant"#564a55"), stroke(nothing)) ))
hstack(p1, p2)

Does that help?

[IgorDouven]

That solves the problem! Many thanks! Op di 1 okt. 2019 om 12:20 schreef Mattriks <notifications@github.com>:

…

In this example, I've changed the font color of the Compose.text to Gadfly's major_label_font color. using Colors p1 = plot(x=xcoords, y=ycoords, color=cols, Geom.point, Guide.title("Title"), Guide.annotation(compose(context(), Compose.text(0.4115, 0.89, "XXX"), fontsize(10pt), font("Helvetica-Neue"), fill("black"), stroke(nothing)) )) p2 = plot(x=xcoords, y=ycoords, color=cols, Geom.point, Guide.title("Title"), Guide.annotation(compose(context(), Compose.text(0.4115, 0.89, "XXX"), fontsize(10pt), font("Helvetica-Neue"), fill(colorant"#564a55"), stroke(nothing)) ))hstack(p1, p2) Does that help? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#1323?email_source=notifications&email_token=AIFACLE7X5RLW6NKV5F4NK3QMMP5PA5CNFSM4I3XJCAKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEAAYRVI#issuecomment-536971477>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AIFACLBIL4FVQ7HONC46AT3QMMP5PANCNFSM4I3XJCAA> .