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%-------------------------------------------------------------------------------
% bchart (LaTeX package)
%-------------------------------------------------------------------------------
% Version: 0.1.0
% Date: 22 November 2011
% Author: Tobias Kuhn
%-------------------------------------------------------------------------------
\ProvidesPackage{bchart}
\usepackage{ifthen}
\usepackage{tikz}
\usetikzlibrary{calc}
% Lengths
\newlength{\bcpos}
\newlength{\bcwidth}
% Chart Arguments
\newcommand{\bcunit}{}
\newcommand{\bcmin}{}
\newcommand{\bcmax}{}
\newcommand{\bcstep}{}
\newcommand{\bcsteps}{}
\newcommand{\bcscale}{}
\newcommand{\bcplainchart}{}
\makeatletter
\define@key{bchart}{unit}{\renewcommand{\bcunit}{#1}}
\define@key{bchart}{width}{\setlength{\bcwidth}{#1}}
\define@key{bchart}{min}{\renewcommand{\bcmin}{#1}}
\define@key{bchart}{max}{\renewcommand{\bcmax}{#1}}
\define@key{bchart}{step}{\renewcommand{\bcstep}{#1}}
\define@key{bchart}{steps}{\renewcommand{\bcsteps}{#1}}
\define@key{bchart}{scale}{\renewcommand{\bcscale}{#1}}
\define@key{bchart}{plain}[false]{\renewcommand{\bcplainchart}{true}}
\makeatother
% Bar Arguments
\newcommand{\bcbarcolor}{}
\newcommand{\bcbartext}{}
\newcommand{\bcbarlabel}{}
\newcommand{\bcplainbar}{}
\makeatletter
\define@key{bcbar}{color}{\renewcommand{\bcbarcolor}{#1}}
\define@key{bcbar}{text}{\renewcommand{\bcbartext}{#1}}
\define@key{bcbar}{label}{\renewcommand{\bcbarlabel}{#1}}
\define@key{bcbar}{plain}[false]{\renewcommand{\bcplainbar}{true}}
\makeatother
% Skip Arguments
\newcommand{\bcskiplabel}{}
\makeatletter
\define@key{bcskip}{label}{\renewcommand{\bcskiplabel}{#1}}
\makeatother
% Bar Charts
\newenvironment{bchart}[1][]{%
% Bars:
\newcommand{\bcbar}[2][]{
% Set defaults:
\renewcommand{\bcbarcolor}{blue!20}
\renewcommand{\bcbartext}{}
\renewcommand{\bcbarlabel}{}
\renewcommand{\bcplainbar}{false}
% Read parameters:
\setkeys{bcbar}{##1}
% Draw bar:
\fill[color=\bcbarcolor,fill,draw] (0,\bcpos) rectangle ($##2-\bcmin*(\bcwidth/\bcrange,0) + (0,\bcpos-5mm)$);
\draw (0,\bcpos) rectangle ($##2-\bcmin*(\bcwidth/\bcrange,0) + (0,\bcpos-5mm)$);
\ifthenelse{\equal{\bcplainbar}{true}}{}{
% Write value:
\node[anchor=west] at ($##2-\bcmin*(\bcwidth/\bcrange,0) + (0,\bcpos-2.5mm)$) {\sf ##2\bcunit};
}
% Write text:
\node[anchor=west] at (0,\bcpos-2.5mm) {\sf \bcbartext};
% Write label:
\node[anchor=east] at (0,\bcpos-2.5mm) {\sf \bcbarlabel};
% Move vertical position downward:
\addtolength{\bcpos}{-5mm}
}%
% Labels:
\newcommand{\bclabel}[1]{
% Write label:
\node[anchor=east] at (0,\bcpos) {\sf ##1};
}%
% General skips:
\newcommand{\bcskip}[2][]{
% Set defaults:
\renewcommand{\bcskiplabel}{}
% Read parameters:
\setkeys{bcskip}{##1}
% Write label:
\node[anchor=east] at ($(0,\bcpos) - 0.5*(0,##2)$) {\sf \bcskiplabel};
% Move vertical position downward:
\addtolength{\bcpos}{-##2}
}%
% Small skips:
\renewcommand{\smallskip}[1][]{\bcskip[##1]{2.5mm}}%
% Medium skips:
\renewcommand{\medskip}[1][]{\bcskip[##1]{5.0mm}}%
% Large skips:
\renewcommand{\bigskip}[1][]{\bcskip[##1]{7.5mm}}%
% X-axis label:
\newcommand{\getbcxlabel}{}%
\newcommand{\bcxlabel}[1]{
\renewcommand{\getbcxlabel}{##1}
}%
\newcommand{\bcrange}{\bcstripunit{\dimexpr\bcmax pt-\bcmin pt\relax}}
% Set defaults:
\renewcommand{\bcunit}{}%
\renewcommand{\bcmin}{0}%
\renewcommand{\bcmax}{100}%
\renewcommand{\bcstep}{\bcrange}%
\renewcommand{\bcsteps}{0,\bcstep,...,\bcrange}%
\renewcommand{\bcscale}{1}%
\renewcommand{\bcplainchart}{false}%
\setlength{\bcpos}{-2.5mm}%
\setlength{\bcwidth}{8cm}%
% Read parameters:
\setkeys{bchart}{#1}%
% Draw chart:
\begin{tikzpicture}[scale=\bcscale]
}{
% Draw axes:
\addtolength{\bcpos}{-2.5mm}
\draw (0,\bcpos) -- (\bcwidth,\bcpos);
\draw (0,0) -- (0,\bcpos);
% Draw scale:
\ifthenelse{\equal{\bcplainchart}{true}}
{ % Scale off
% Set position for x-axis label:
\coordinate (labelpos) at (0,\bcpos-2mm);
}{ % Scale on
% Draw start value and set position for x-axis label:
\draw (0,\bcpos) -- (0,\bcpos-1mm);
\node[anchor=north] (n) at (0,\bcpos-1mm)
{\sf \bcstripunit{\dimexpr\bcmin pt\relax}\bcunit};
\coordinate (labelpos) at (n.south);
% Draw other values:
\foreach \x in \bcsteps {
\ifthenelse{\equal{\x}{0}}{}{
\draw ($\x*(\bcwidth/\bcrange,0) + (0,\bcpos)$) -- ($\x*(\bcwidth/\bcrange,0) + (0,\bcpos-1mm)$);
\node[anchor=north] at ($\x*(\bcwidth/\bcrange,0) + (0,\bcpos-1mm)$)
{\sf \bcstripunit{\dimexpr\bcmin pt+\x pt\relax}\bcunit};
}
}
}
% Write x-axis label:
\ifthenelse{\equal{\getbcxlabel}{}}{}{
\node[anchor=north,inner sep=0.5mm] at ($0.5*(\bcwidth,0) + (labelpos)$) {\sf \getbcxlabel};
}
\end{tikzpicture}%
}
% Auxiliary commands:
\makeatletter
\newcommand*{\bcstripunit}[1]{\strip@pt#1}
\makeatother
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