Changing text color for charts using pgf-pie

Question

Is possible to change text color inside pie chart using the pgf-pie package?

Is possible change the color of text on a single slice of the pie?

\documentclass[tikz]{standalone}
\usepackage{pgf-pie}
\begin{document}
\begin{tikzpicture}[scale=0.9]
\pie[
  /tikz/every pin/.style={align=center},
  text=pin,
  rotate=240,
  explode=0.2,
  color={blue!70,cyan!70,red!70,orange!50}
] {65/Amplificatori di\\potenza, 10/Elaborazione\\del segnale,
   17.5/Sistemi di\\raffreddamento, 7.5/Alimentazione}
\end{tikzpicture}
\end{document}

You could try \textcolor{enter color here}{your text here} if the text you are talking about is in a node. — dustin, Aug 14 '13 at 14:11
Hi Dustin unfortunately your suggestion doesn't work with this package "pgf-pie" — user21431, Aug 15 '13 at 10:55
I can't find any documentation on this package so I don't know how you can do that. My first comment was a guess. — dustin, Aug 15 '13 at 17:02
While I'm not an expert, it doesn't appear to be possible at the moment without editing pgf-pie.sty somehow, so I would suggest placing a feature request in the issue tracker. — Torbjørn T., Aug 18 '13 at 08:22
Can you add a minimal working example (MWE) to play with? As I discovered on Put numbers in legend using pgf pie, pgf-pie is not very flexible and parts of the package probably need to be rewritten. Though you can use the /tikz/every pin style to change the text color of the labels outside of the slices (see Start a new line in label using pgf-pie). — Qrrbrbirlbel, Aug 30 '13 at 09:18
in the example above, I would like that the percentages in the slices were in white — user21431, Aug 31 '13 at 10:44
thank you for the answer Qrrbrbirlbel. You said that the use of pgf-pie is not recommend. Can you suggest an alternative better example for create flexible pie charts? — user21431, Sep 01 '13 at 19:47

score 8 · Accepted Answer · answered Aug 31 '13 at 20:12

I can’t really recommend pgf-pie due its inflexibility (and its use of the main PGFkeys path) but here is a etoolbox powered solution to insert a key that is tried on the node that includes the number (and only that number).

\documentclass[tikz]{standalone}
\usepackage{pgf-pie,etoolbox}
\makeatletter
\patchcmd\pgfpie@slice
  {node {\scalefont{#3}\beforenumber#3\afternumber}}
  {node[/every only number node/.try] {\scalefont{#3}\beforenumber#3\afternumber}}{}{}
\makeatother
\begin{document}
\begin{tikzpicture}[scale=0.9]
\pie[
  /tikz/every pin/.style={align=center},
  every only number node/.style={text=white},
  text=pin,
  rotate=240,
  explode=0.2,
  color={blue!70,cyan!70,red!70,orange!50}
] {65/Amplificatori di\\potenza, 10/Elaborazione\\del segnale,17.5/Sistemi di\\raffreddamento, 7.5/Alimentazione}
\end{tikzpicture}
\end{document}

Output

enter image description here

thank you for the answer Qrrbrbirlbel. You said that the use of pgf-pie is not recommend. Can you suggest an alternative better example for create flexible pie charts? — user21431, Sep 01 '13 at 19:50
@user21431 (To be precise, I said, that I don’t recommend pgf-pie. What others say about that I don’t know.) Well, I wouldn’t use pie charts to begin with. See this comment’s link (and the question) as well as How can I produce a 'ring (or wheel) chart' like that on page 88 of the PGF manual? and How to design a 3D donut pie chart with pgf-plot? (but please don’t use 3D, see first link). — Qrrbrbirlbel, Sep 01 '13 at 20:18

score 2 · Answer 2 · answered Jan 25 '20 at 17:51

/tikz/nodes={text=white, font=\bfseries, ...... },

\documentclass[tikz, border=5pt]{standalone}
\usepackage{pgf-pie}

\begin{document}
\begin{tikzpicture}[scale=0.9]
\pie[
/tikz/nodes={text=white, font=\bfseries},
/tikz/every pin/.style={align=center, text=black, font=\normalfont},
text=pin,
rotate=240,
explode=0.2,
color={blue!70,cyan!70,red!70,orange!50}
] {65/Amplificatori di\\potenza, 10/Elaborazione\\del segnale,
17.5/Sistemi di\\raffreddamento, 7.5/Alimentazione}
\end{tikzpicture}
\end{document}

Changing text color for charts using pgf-pie

2 Answers2

Output

Linked