# tikz, conditional setting of shape parameters

In my illustration I use simplified sketches of stopwatches (timers), which appear in three different "modes": (1) start of interval (coloured green), (2) time in progress (yellow), and time is expired (red).

For each of these cases, I determined separate styles which differ from each other only in two lines, see MWE:

\documentclass[12pt,tikz,border=3mm]{standalone}
\usetikzlibrary{chains,shapes}
\begin{document}
\begin{tikzpicture}
\tikzset{
node distance = 5mm,
start chain = going right,
boxG/.style 2 args = {name=n#1,
shape=rectangle, draw=#2, thick, inner sep=0mm, on chain,
node contents={\tikz{
\fill[radius=3.4mm,white] (0,0) -- + (90:3.4mm) arc[start angle=90,end angle=135] -- cycle;
\foreach \i in {0,30,...,330}   \draw (0,0) ++ (\i:2.5mm) -- (\i:3mm);
\draw                       ( 0mm,-1mm) -- ++ (0mm,4.0mm);
\draw[orange,ultra thick]   (+1mm,-1mm) -- ++ (135:4.5mm);
\draw[thick,->]             ( 0mm,-1mm) -- ++ ( 90:4.0mm);
}}
},
boxY/.style 2 args = {name=n#1,
shape=rectangle, draw=#2, thick, inner sep=0mm, on chain,
node contents={\tikz{
\fill[radius=3.4mm,white] (0,0) -- + (90:3.4mm) arc[start angle=90,end angle=135] -- cycle;
\foreach \i in {0,30,...,330}   \draw (0,0) ++ (\i:2.5mm) -- (\i:3mm);
\draw                       ( 0mm,-1mm) -- ++ (0mm,4.0mm);
\draw[orange,ultra thick]   (+1mm,-1mm) -- ++ (135:4.5mm);
\draw[thick,->]             (+1mm,+1mm) -- ++ (225:4.0mm);
}}
},
boxR/.style 2 args = {name=n#1,
shape=circle, draw=#2, thick, inner sep=0mm, on chain,
node contents={\tikz{
\fill[radius=3.4mm,white] (0,0) -- + (90:3.4mm) arc[start angle=90,end angle=135] -- cycle;
\foreach \i in {0,30,...,330}   \draw (0,0) ++ (\i:2.5mm) -- (\i:3mm);
\draw                       ( 0mm,-1mm) -- ++ (0mm,4.0mm);
\draw[yellow,ultra thick]   (+1mm,-1mm) -- ++ (135:4.5mm);
\draw[thick,->]             (+1mm,-1mm) -- ++ (135:4.0mm);
}}
},
}
\node[boxG={1}{green}];
\node[boxY={2}{yellow}];
\node[boxR={3}{red}];
\end{tikzpicture}
\end{document}


I was wondering whether it is possible to determine just one style, where the last two lines are selected regarding the used color, something like this:

timer/.style 2 args = {name=n#1,
shape=circle, draw=#2, thick, inner sep=0mm, on chain,
node contents={\tikz{
\fill[radius=3.4mm,white] (0,0) -- + (90:3.4mm) arc[start angle=90,end angle=135] -- cycle;
\foreach \i in {0,30,...,330}   \draw (0,0) ++ (\i:2.5mm) -- (\i:3mm);
\draw                       ( 0mm,-1mm) -- ++ (0mm,4.0mm);
%%%% pseudocode for conditional selecting of appropriate last two lines
if #2 = green
\draw[orange,ultra thick]   (+1mm,-1mm) -- ++ (135:4.5mm);
\draw[thick,->]             ( 0mm,-1mm) -- ++ ( 90:4.0mm);
else if #2 = yellow
\draw[orange,ultra thick]   (+1mm,-1mm) -- ++ (135:4.5mm);
\draw[thick,->]             (+1mm,+1mm) -- ++ (225:4.0mm);
else if #2 = red
\draw[yellow,ultra thick]   (+1mm,-1mm) -- ++ (135:4.5mm);
\draw[thick,->]             (+1mm,-1mm) -- ++ (135:4.0mm);
fi fi fi
%%%%
}}}


Additional question: in the third timer, why isn't the distance between the inner picture and outer node equal to zero as it is in the first two (finally I would like to have a circle for outer node)?

• Still don't know why, but inner sep=-1mm in boxR solves last question. – Ignasi Jun 4 '14 at 8:10
• A simple hack is to use \@namedef{clock-green}{LAST TWO LINES} etc for each color (once, in the preamble) and then in the node contents do \@nameuse{clock-#2} – Bordaigorl Jun 4 '14 at 8:10
• BTW the use of nested tikz pictures is discouraged, if you are using PGF3 you can use the great new pic action. – Bordaigorl Jun 4 '14 at 8:15

Here is another suggestion using a node inside the pic. You can refer to this node and its anchors by <picname>-c outside the pic code.

\documentclass[12pt,tikz,border=3mm]{standalone}
\usepackage{etoolbox}
\usetikzlibrary{positioning}
\newcommand*\clcol{}

\tikzset{
pics/clock/.style={code={
\edef\clcol{#1}
\node(-c)[draw=\clcol,thick,minimum size=7mm+\pgflinewidth]{};
\coordinate(q)at(-c.center);
\fill[radius=3.5mm-.5*\pgflinewidth,white] (q) -- + (90:{3.5mm-.5*\pgflinewidth}) arc[start angle=90,end angle=135] -- cycle;
\foreach \i in {0,30,...,330}   \draw (q) + (\i:2.5mm) -- +(\i:3mm);
\ifdefstring{\clcol}{green}{%
\draw[orange,ultra thick]   (q)++(+1mm,-1mm) -- +(135:4.5mm);
\draw[thick,->]             (q)++( 0mm,-1mm) -- +( 90:4.0mm);}{}
\ifdefstring{\clcol}{yellow}{%
\draw[orange,ultra thick]   (q)++(+1mm,-1mm) -- +(135:4.5mm);
\draw[thick,->]             (q)++(+1mm,+1mm) -- +(225:4.0mm);}{}
\ifdefstring{\clcol}{red}{%
\draw[yellow,ultra thick]   (q)++(+1mm,-1mm) -- +(135:4.5mm);
\draw[thick,->]             (q)++(+1mm,-1mm) -- +(135:4.0mm);}{}
}}}

\begin{document}
\begin{tikzpicture}
\draw[help lines](-1,-1)grid(2,2);
\pic(n1)[circle] at (0,0){clock=red};
\pic(n2)[right=1cm,anchor=north west] at (n1-c){clock=yellow};
\pic(n3)[above right=1cm and 1cm,anchor=south] at (n1-c){clock=green};
\draw[->](n1-c)edge(n2-c)
(n2-c)edge(n3-c)
(n3-c)edge(n1-c);
\end{tikzpicture}
\end{document}


To explain the distance between the black drawn circle and the red circle node in the MWE of the question: the node contents is set in a rectangular box and the circle node fits this box.

\documentclass[tikz,margin=5mm]{standalone}
\begin{document}
\tikz{%
\node[draw=blue,thin, dashed,minimum size=7mm]{};
}
\end{document}


## 2nd version (without pic)

To solve the distance problem in the circle node I use the minimum size option instead of inner sep=0pt. Using overlay for the node contents hides its dimension.

\documentclass[12pt,tikz,border=3mm]{standalone}
\usepackage{etoolbox}
\usetikzlibrary{chains,shapes}
\begin{document}
\begin{tikzpicture}
\tikzset{
node distance = 5mm,
start chain = going right,%
box/.style 2 args = {
name=n#1,
draw=#2,
thick,
minimum size=7mm+\pgflinewidth,
on chain,
node contents={\edef\clcol{#2}\tikz[overlay]{
\fill[radius=3.5mm-0.5*\pgflinewidth,white] (0,0) -- + (90:{3.5mm-0.5*\pgflinewidth}) arc[start angle=90,end angle=135] -- cycle;
\foreach \i in {0,30,...,330}   \draw (0,0) ++ (\i:2.5mm) -- (\i:3mm);
\ifdefstring{\clcol}{green}{%
\draw[orange,ultra thick]   (+1mm,-1mm) -- +(135:4.5mm);
\draw[thick,->]             ( 0mm,-1mm) -- +( 90:4.0mm);}{}
\ifdefstring{\clcol}{yellow}{%
\draw[orange,ultra thick]   (+1mm,-1mm) -- +(135:4.5mm);
\draw[thick,->]             (+1mm,+1mm) -- +(225:4.0mm);}{}
\ifdefstring{\clcol}{red}{%
\draw[yellow,ultra thick]   (+1mm,-1mm) -- +(135:4.5mm);
\draw[thick,->]             (+1mm,-1mm) -- +(135:4.0mm);}{}
}}
},
}
\node[box={1}{green}];
\node[box={2}{yellow}];
\node[box={3}{red},circle];
\end{tikzpicture}
\end{document}


• Nice! I understand that circle option is applied to inner -c node. Could you explain me how? – Ignasi Jun 4 '14 at 13:42
• It sets the key /tikz/shape=circle and therefore circle is the default node shape in this pic. The same happens for instance in: \tikz[circle]\node[draw]{}; – esdd Jun 4 '14 at 13:59
• @essed, sorry for late replay, it seem that half of night the page was down ... I liked bot of your answers, but temporary I will stay with secona variant, it is the closed to my (up to now) way of drawing of tikz pictures. – Zarko Jun 5 '14 at 0:15

It's not a definitive answer because I don't know how do you want to use this symbols and the code don't use conditioned styles. What I've done was to use pics (you need TikZ 3.0).

The first pic clock draws the common part of your symbols and the other three pics use it (fixing its filling color) and draw particular characteristics. At the moment, each particular symbol boxG, boxY and boxR fixes its color, so there is no need for a second argument as in your examples.

About the first argument in your example (node name) I was not sure what to do with it and also avoided. If you explain why do you need them, the code could change.

\documentclass[12pt,tikz,border=3mm]{standalone}

\tikzset{
pics/clock/.style = {
code = {
arc[start angle=90, end angle=135] -- cycle;
\foreach \i in {0,30,...,330}
\draw (0,0) ++ (\i:2.5mm) -- (\i:3mm);
\draw ( 0mm,-1mm) -- ++ (0mm,4.0mm);
}
},
pics/boxG/.style = {
code = {
\draw[thick,green] (-3.6mm,-3.6mm) rectangle (3.6mm,3.6mm);
\draw (0,0) pic {clock = {green}};
\draw[orange,ultra thick]   (+1mm,-1mm) -- ++ (135:4.5mm);
\draw[thick,->] ( 0mm,-1mm) -- ++ ( 90:4.0mm);
}
},
pics/boxY/.style = {
code = {
\draw[thick,yellow] (-3.6mm,-3.6mm) rectangle (3.6mm,3.6mm);
\draw (0,0) pic {clock = {yellow}};
\draw[orange,ultra thick]   (+1mm,-1mm) -- ++ (135:4.5mm);
\draw[thick,->] (+1mm,+1mm) -- ++ (225:4.0mm);
}
},
pics/boxR/.style= {
code = {
\draw (0,0) pic {clock = {red}};
\draw[yellow,ultra thick]   (+1mm,-1mm) -- ++ (135:4.5mm);
\draw[thick,->] ( +1mm,-1mm) -- ++ (135:4.0mm);
}
},
}

\begin{document}
\begin{tikzpicture}
\draw (0,0) pic {boxG};
\draw (1,0) pic {boxY};
\draw (2,0) pic {boxR};
\end{tikzpicture}
\end{document}


2nd version

Not sure if it's an improvement, but now only one clock is defined. Two new keys are added, border and time with possible values R, G and Y. They select the kind of border and arrow position.

I must admit I don't understand very well how pgfkeys work. It's my first time, so I hope somebody else will correct or propose better answers.

The result is exactly the same than first version, although the syntax has changed.

\documentclass[12pt,tikz,border=3mm]{standalone}

\tikzset{
/border/.is choice,
/border/G/.code = {
\draw[thick,green] (-3.6mm,-3.6mm) rectangle (3.6mm,3.6mm);
},
/border/Y/.code = {
\draw[thick,yellow] (-3.6mm,-3.6mm) rectangle (3.6mm,3.6mm);
},
/border/R/.code = {
},
/time/.is choice,
/time/G/.code = {
\draw[orange,ultra thick]   (+1mm,-1mm) -- ++ (135:4.5mm);
\draw[thick,->] ( 0mm,-1mm) -- ++ ( 90:4.0mm);
},
/time/Y/.code = {
\draw[orange,ultra thick]   (+1mm,-1mm) -- ++ (135:4.5mm);
\draw[thick,->] (+1mm,+1mm) -- ++ (225:4.0mm);
},
/time/R/.code = {
\draw[yellow,ultra thick]   (+1mm,-1mm) -- ++ (135:4.5mm);
\draw[thick,->] ( +1mm,-1mm) -- ++ (135:4.0mm);
},
pics/clock/.style 2 args= {
code = {
\pgfkeys{border=#1},
arc[start angle=90, end angle=135] -- cycle;
\foreach \i in {0,30,...,330}
\draw (0,0) ++ (\i:2.5mm) -- (\i:3mm);
\draw ( 0mm,-1mm) -- ++ (0mm,4.0mm);
\pgfkeys{time=#1}
}
},
}

\begin{document}
\begin{tikzpicture}
\draw (0,0) pic {clock={G}{green}};
\draw (1,0) pic {clock={Y}{yellow}};
\draw (2,0) pic {clock={R}{red}};
\end{tikzpicture}
\end{document}

• i thinking about use of pic, but til to now i'm not know how to use it ... names of clocks (timers) I need for placing them. For example yellow one is some distance right/below green one and connected with some, usually with dashed line, so your second version is close to this, for what i looking for. temporary I'm occupied with some other obligation, so more detailed tests i will perform late evening. – Zarko Jun 4 '14 at 13:03