The TikZpingus package

Internals

C.3 Keys, Styles and Defaults¶

All keys of the package live in /pingu. Most of them only store a value, for example a color is stored with \pingu@color in a macro and read when it is drawn. The set /pingu/defaults puts everything back to the start, and \pingudefaults and \pingudefaultsappend add your own defaults to it. The composed keys, like /pingu/:ghost or /pingu/:hide, are styles that change the styles of the parts in /pingu/@<part>:

tikzpingus.sty, lines 575–606

\newif\if@pingu@do@back@

\pgfqkeys{/pingu}{

  :line/.style            = {/pingu/@block/.append style={fill=none,draw=##1!80!black,shade=none,path fading=none}},

  :fill/.style            = {/pingu/body=#1,/pingu/body front=#1,/pingu/feet color=#1, /pingu/bill color=#1, /pingu/eyes color=#1, /pingu/eyes second color=#1},

  :fill/.default          = pingu@main,

  :pingu/.style           = {/pingu/@body/.style={#1},/pingu/@wings/.style={#1},/pingu/@eyes/.style={#1},/pingu/@bill/.style={#1},/pingu/@hair/.style={#1},/pingu/@feet/.style={#1}},

  :toast/.style           = {/pingu/left wing=none,/pingu/right wing=none,/pingu/feet=none,/pingu/hair=\@pingu@none},

  :mix-draw/.style        = {:pingu={/pingu/@block/.append style={/pingu/@pingu@all={####1!#1}, fill={####1!#1}}}},

  :mix-draw/.default      = 50!white,

  :mix-all/.code         = {\ifx\pingu@mixall\@empty\def\pingu@mixall{#1}\else\edef\pingu@mixall{\pingu@mixall!#1}\fi},

  :mix-all/.default      = 50!white,

  :mix/.style             = {

    /pingu/@body/.code={\@pingu@color@mixwith\pingu@color@body@main{#1}\@pingu@color@mixwith\pingu@color@body@head{#1}},

    /pingu/@wings/.code={\@pingu@color@mixwith\pingu@color@left@wing{#1}\@pingu@color@mixwith\pingu@color@right@wing{#1}},

    /pingu/@eyes/.code={\@pingu@color@mixwith\pingu@color@eye@left{#1}\@pingu@color@mixwith\pingu@color@eye@right{#1}\@pingu@color@mixwith\pingu@color@eye@second@left{#1}\@pingu@color@mixwith\pingu@color@eye@second@right{#1}},

    /pingu/@bill/.code={\@pingu@color@mixwith\pingu@color@bill{#1}},

    /pingu/@hair/.code={\@pingu@color@mixwith\pingu@color@hair@a{#1}\@pingu@color@mixwith\pingu@color@hair@b{#1}\@pingu@color@mixwith\pingu@color@hair@c{#1}\@pingu@color@mixwith\pingu@color@hair@d{#1}\@pingu@color@mixwith\pingu@color@hair@e{#1}},

    /pingu/@feet/.code={\@pingu@color@mixwith\pingu@color@foot@left{#1}\@pingu@color@mixwith\pingu@color@foot@right{#1}}

   },

  :mix/.default           = 50!white,

  :ghost parts/.style     = {/pingu/@pingu@all/.append style={opacity={#1}}},

  :ghost parts/.default   = {.5},

  :ghost/.style           = {/pingu/@pingu/.append style={opacity=#1,transparency group}},

  :ghost/.default         = {.5},

  :ghost glow/.style      = {/pingu/@pingu/.append style={opacity=#1,transparency group},/pingu/@block/.append style={/pingu/@glow}},

  :ghost glow/.default    = {.5},

  :devil/.style           = {/pingu/devil horns=#1,/pingu/eyes devil=#1},

  :devil/.default         = pingu@purple,

  :hide/.style            = {/pingu/body type=none,/pingu/hair=\@pingu@none,/pingu/feet=none,/pingu/wings=none,/pingu/bill=none,/pingu/eyes=none},

  :back/.code            = {\pgfqkeys{/pingu}{eyes=none,bill=none,body front=\pingu@color@body@main,@pingu@main/.append style={xshift=2\pingu@w@half,xscale=-1},feet back}\gdef\pingu@back@init@call{\ifpengu@setup@manual@layers@\pgfsetlayers{foreground,middle,main,background}\fi\gdef\pingu@back@init@call{}}\@pingu@do@back@true}

}

\let\pingu@back@init@call\@empty

A part may need a group of its own, for example to place a part on another layer. This is what \pingu@layer is for:

tikzpingus.sty, lines 567–568

\def\pingu@layer#1[#2]{\pgfonlayer{\csname pingu@L@#1\endcsname}\scope[/pingu/@pingu,#2]}

\def\endpingu@layer{\endscope\endpgfonlayer}