Text Formatting ⇒ Automatic paragraph coloring pattern

[gmedina]

Some time ago a challenge was posed in another forum[1] in this thread and I haven't been able to design an acceptable solution to the proposed problem. The idea is to define a command \selstudy with two mandatory arguments; the code

Code: Select all

1
\selfstudy{Exercises 1 and 4}{Review the information from Exercise 5. Make a brief recording answering this question: Are the requirements for a college degree in your country similar to those in the United States? Explain the similarities and differences.}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

should produce the outcome shown in tha attached image.

The difficult part (for me) is to achieve the color pattern for the text. Any ideas would be most welcome!

[1] http://foro.migui.com/

[gmedina]

Just an update. A few days ago (February the 14th) I posted a question about this problem in this thread in comp.text.tex; Philipp Stephani gave me the hint that I needed to finally build the required command.

Here I post the final solution to the challenge and an example; the code contains some comments (in Spanish):

Code: Select all

Code, edit and compile here:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
\documentclass{article} 
\usepackage{tikz}
\usetikzlibrary{calc,shapes}
% caja auxiliar (para guardar cada línea en \ponerlineas)
\newsavebox\linebox
% contador para el número de líneas en el párrafo
% al que se aplica \ponerlineas
\newcounter{numlin}
% macro que disecta párrafos en sus líneas constituyentes
% para (en este caso) agregar una línea blanca entre renglones
\newcommand*\ponerlineas{%
 \setcounter{numlin}{0}
 \setlength\textwidth{14.8cm}% 
 \setbox\linebox\lastbox 
 \ifvoid\linebox\medskip\else 
   \unskip 
   \unpenalty 
   {\ponerlineas}% 
   \hspace*{3cm}\box\linebox\hspace*{-3cm}
   \smallskip\stepcounter{numlin}
   \color{white}{\hrule width\textwidth height1pt} 
   \smallskip
 \fi
} 
% el ícono para el casete
\newcommand*\casete{%
\begin{tikzpicture}
 \node [matrix,fill=black,inner sep=2pt,ampersand replacement=\&]
 {%
   \draw [draw=none,fill=white] (-2pt,0) circle (1.5pt); \& 
   \draw [fill=black] (0,0) circle (1.5pt); \&
   \draw [draw=none,fill=white] (0,0) circle (1.5pt);\\
  };
\end{tikzpicture}
}
% el ícono para los audífonos
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Run LaTeX here