How to put a figure on the left space of a large indented paragraph without breaking the paragraph?

Question

I have a standalone document that creates a figure using tikz package as below:

\documentclass{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw (0,0) -- (1,1);
\end{tikzpicture}
\end{document}  

I want to put the figure on the very left of my book at a location dictated by [h!]. The book has its paragraphs indented to the left 2.25 inch with respect to the left margin by using adjustwidth command and changepage package. This 2.25 inch indentation is a great place to put the tikz figure. But I do not want to break my paragraph to create a gap because of the figure. Do you know how to do it? Also both figures and captions I like to align all the way to the left.

\documentclass[openany]{book}
\usepackage{tikz}
\usepackage{standalone}
\usepackage{changepage}
\usepackage{geometry}
 \geometry{paperheight=9.8125in,paperwidth=8in, left=.5in, 
right=.5in,top=.75in,bottom=.4375in }
\usepackage{fancyhdr}
\fancypagestyle{plain}{\fancyhf{} \fancyhead[EL,OR]{\textbf 
{\thepage}}\renewcommand{\headrulewidth}{0pt}}
\pagestyle{plain}
\renewcommand{\rmdefault}{pag}
\begin{document}
\begin{adjustwidth}{2.25in}{0pt}
\section{Introduction}\label{Intro}
\chapter {Dogs}
Dogs\\
Dogs.................
\section{Cats}
I put some words before the figure\\
I put some words before the figure\\
\begin{figure}[h!]
 \includestandalone[width=.2\textwidth]{mytikz}%     without .tex extension
 % or use \input{mytikz}
 \caption{My TikZ picture}
 \label{fig:tikz:my}
\end{figure}
 Do not want to break  the words because of the figure. I like to put my 
 figure at the indented margin.\\
 Do not want to break  the words because of the figure. I like to put my 
 figure at the indented margin.
 \end{adjustwidth}
 \end{document}

Answer 1

I am not sure I understand what exactly you mean.

Do you want to put your figure in the space left free by the indentation of the paragraph's first line? Then something like

\noindent\makebox[\parindent]{\tikz\draw (0,0) -- (1ex,1ex);}

could do the job for you. This first kills the indentation with \noindent to replace it with a \makebox[\parindent] of equivalent width.

Or do you want to have your figure in the margin? Then something like

\leavevmode\marginpar{\flushright\tikz[baseline=-1ex]\draw (0,0) -- (-1,-1);}

may be right. Here, \leavevmode ensures that a new paragraph is started before putting your picture in the \marginpar. You may have to adjust the side and alignment of your margin paragraph using \reversemarginpar and \flushleft or \flushright.

Or maybe

\marginpar{\includegraphics{figure}\captionof{figure}{Some figure}}

is what you want. Here, the figure is first compiled into a PDF file named figure.pdf, which is then included as image. The \captionof macro allows to make captions outside floating environments.

Here is a complete example:

\documentclass[openany]{book}

\usepackage{lipsum}

\usepackage{tikz}

\usepackage{caption}

\begin{document}

    \lipsum[1]

    \noindent\makebox[\parindent]{\tikz\draw (0,0) -- (1ex,1ex);}\lipsum[2]

    \reversemarginpar
    \leavevmode\marginpar{\flushright\tikz[baseline=-1ex]\draw (0,0) -- (-1,-1);}\lipsum[3]
    \normalmarginpar

    \lipsum[4]\marginpar{\includegraphics{figure}\captionof{figure}{Some figure}}\lipsum[5]

\end{document}