\ProvidesPackage{google_style_donut_chart}[2017/10/220 v1.0 Donut chart]

\usepackage{tikz}
\usepackage{xcolor}

\definecolor{chartColor1}{HTML}{4285F4}
\definecolor{chartColor2}{HTML}{DB4437}
\definecolor{chartColor3}{HTML}{F4B400}
\definecolor{chartColor4}{HTML}{0F9D58}
\definecolor{chartColor5}{HTML}{AB47BC}
\definecolor{chartColor6}{HTML}{00ACC1}

% Adjusts the size of the wheel:
\def\innerradius{2.0cm}
\def\outerradius{4.2cm}

% I found somewhere on the internet an template for this and I extended to fit.
%
% The default usage:
% \wheelchart{28.3/chartColor1/Loading, 775.5/chartColor2/Scripting, 79.3/chartColor3/Rendering, 16/charColor4/Painting, 163/chartColor5/Other}
\newcommand{\wheelchart}[1]{
    % Calculate total
    \pgfmathsetmacro{\totalnum}{0}
    \foreach \value/\color/\name [count=\xi] in {#1} {
        \pgfmathparse{\value+\totalnum}
        \global\let\totalnum=\pgfmathresult
        \global\let\allnum=\xi
    }

    \begin{tikzpicture}
      % Calculate the thickness and the middle line of the wheel
      \pgfmathsetmacro{\wheelwidth}{\outerradius-\innerradius}
      \pgfmathsetmacro{\midradius}{(\outerradius+\innerradius)/2}

      % Rotate so we start from the top
      \begin{scope}[line width=\wheelwidth,rotate=90]

      % Loop through each value set. \cumnum keeps track of where we are in the wheel
      \pgfmathsetmacro{\cumnum}{0}
      \foreach \value/\color/\name [count=\xi] in {#1} {
            \pgfmathsetmacro{\newcumnum}{\cumnum + \value/\totalnum*360}

            % Calculate the percent value
            \pgfmathsetmacro{\percentage}{\value/\totalnum*100}
            % Calculate the mid angle of the color segments to place the labels
            \pgfmathsetmacro{\midangle}{-(\cumnum+\newcumnum)/2}

            % This is necessary for the labels to align nicely
            \pgfmathparse{
               (-\midangle<5?"south":
                (-\midangle<85?"south west":
                 (-\midangle<105?"west":
                  (-\midangle<175?"north west":
                   (-\midangle<185?"north":
                    (-\midangle<265?"north east":
                     (-\midangle<275?"east":
                      (-\midangle<355?"south east":"south")
                     )
                    )
                   )
                  )
                 )
                )
               )
            } \edef\textanchor{\pgfmathresult}

            % Draw the color segments. Somehow, the \midrow units got lost, so we add 'pt' at the end. Not nice...
            \draw[color=\color] (-\cumnum:\midradius pt) arc (-\cumnum:-(\newcumnum):\midradius pt);

            % Draw the data labels
            \node [color=\color] at (\allnum/2-\xi, 7.0){\name: \value};

            % Set the old cumulated angle to the new value
            \global\let\cumnum=\newcumnum
        }

      \end{scope}
      \draw[gray] (0,0) circle (\outerradius) circle (\innerradius);
    \end{tikzpicture}
}