Partition function- without duplicates
I would use a slightly different approach, first try and get everything into a macro and enable usage of cm throughout. As a point of reference is best to use the bottom left hand corner of the box like a normal plot (easier to remember and to visualize).
Here is the MWE:
\documentclass{article}
\usepackage{graphicx,environ}
\usepackage{overpic}
\usepackage{picture}
\usepackage{xcolor}
\def\sampletext{Some text that will fit
Some text that will fit
Some text that will fit
Some text that will fit.}
\fboxsep=0pt
\fboxrule=0pt
\begin{document}
% #1 x position
% #2 y position
% #3 width
% #4 height
% #5 graphics
\long\def\combo(#1,#2)#3#4#5#6{%
\begin{overpic}[width=#3, height=#4, grid,tics=10]{#5}
\parindent0pt
\put(#1,#2){%
\vbox{\leftskip5pt\rightskip5pt\hsize #3\color{white}\sffamily
#6\par}%
}%
\end{overpic}}
\combo(0cm,1cm){10cm}{8cm}{./graphics/cardtrick}{\large \sampletext}
\medskip
\combo(0cm,1cm){10cm}{8cm}{./graphics/cardtrick}{\Large\bfseries \sampletext}
\end{document}
Ideally, this should be a key value macro. If I understood your requirements correctly please drop a comment and I will extend it to a key value answer. Please also note that I have added a \leftskip and a \rightskip to allow for a little bit of padding. You can zero it if you don't need it.
UPDATED VERSION
Version uses key values for exact position, padding borders and fitting text into a set of given parameters by re-sizing fonts.
Text can be aligned using the key values justified, raggedleft, raggedright and from the ragged2e package RaggedLeft and RaggedRight.
Typical entry with a few adjustments,
\combo[x=0pt,y=0pt,
padding-left=5pt,
padding-right=5pt,
text-color=yellow,
text-width=5cm,
text-height=5cm,
image-width=13cm,
image-height=9.5cm,
image-url=cardtrick,
tics, showframe=true,
]{\lipsum[2]}
Below is a MWE with the code, a bit longish but I am hoping to polish it a bit and create a proper |.dtx| file and package which I will post at github soon.
\documentclass{article}
\usepackage[latin]{babel}
\usepackage{graphicx,lipsum}
\usepackage{overpic}
\usepackage{picture}
\usepackage{xcolor}
\usepackage{ragged2e}
\usepackage{combo}
\RequirePackage{pgf}[2008/01/15]
\fboxsep=0pt
\fboxrule=1pt
\makeatletter
% We use two boxes, one to store the contents of the text
% and another to store and measure the image
\newbox\textbox
% newif
\newif\if@ok
\@oktrue
\newif\ifshowframe
\newif\if@center
\newif\if@vcenter
% Step one define family
\pgfkeys{/combo/.is family}
% We store keys mostly in their own macros
\pgfkeys{/combo
% text positioning, reference is 0,0 at the left hand
% corner of the image
x/.store in=\position@x,
y/.store in=\position@y,
% text box padding
padding-left/.store in=\padding@left,
padding-left/.default=0pt,
padding-right/.store in=\padding@right,
padding-right/.default=0pt,
%
padding-bottom/.store in=\padding@bottom,
padding-bottom/.default=0pt,
%
padding-top/.store in=\padding@top,
padding-top/.default = 0pt,
% text coloring
text-color/.store in=\combo@textcolor,
text-color/.default=white,
% text width
text-width/.store in=\combo@textwidth,
text-width/.default=100pt,
text-height/.store in=\combo@textheight,
text-height/.default=5cm,
border-width/.store in=\combo@borderwidth,
border-color/.store in=\combo@bordercolor,
border-color/.default=red,
image-width/.store in=\combo@imgwidth,
image-width/.default=5cm,
image-height/.store in=\combo@imgheight,
image-height/.default=5cm,
image-url/.store in=\combo@imageurl,
% the file name for the graphic
image-url/.default=cardtrick,
tics/.store in=\combo@tics,
tics/.default=10,
showgrid/.store in=\combo@grid,
showgrid/.default ={,},
% define show frame key
showframe/.is if= showframe,
align/.is choice,
align/center/.code={\@centertrue},
align/vcenter/.code ={\@vcentertrue},
text-align/.store in = \combo@textalign,
border/.style={border-color=blue}
}
% Process keys and set defaults, for later use
\def\setdefaults{\pgfkeys{/combo
x=12pt,y=50pt,
padding-left,
padding-right,
padding-bottom,
text-align=raggedleft,
padding-top=0pt,
showgrid=grid,
}%
}
\setdefaults
% The approach we use is to have a set of predefined sizes
% to try out. If we cannot use any of these sizes, we fall back
% to scaling the fonts.
%
% We use a the list |\font@size@list| to hold all the allowable
% sizes for text. We also provide a command to add other sizes.
\newcommand{\font@size@list}{%
\Huge,\huge,
\LARGE,\Large
\large,\normalsize,
\small,\footnotesize,,
\scriptsize,\tiny%
}
% Author command holding default font size
% nothing else needed
\newcommand\default@fontsize{\small}
% Getter and setter for fontsize
% set@text@size
\def\set@text@size#1{%
\def\combo@text@size{#1}%
}
% we set default at \small
\set@text@size{\default@fontsize}
% holds the font details (Must add shape). Can be a bit automated
% as well
\newcommand\combo@inbox{}
% #2 x position of text block
% #3 y position
% #4 width
% #5 height
% #6 graphic
%
% We use pgf keys
\newcommand{\combo}[2][]{%
\setdefaults
\pgfkeys{/combo #1}
\def\combo@color{\color{\combo@textcolor}}
\def\combofont{%
\bfseries\rmfamily
\slshape\selectfont
\combo@text@size\combo@color
}%
% We store the contents of the text block in a
% box in order to measure the dimensions
\renewcommand{\combo@inbox}{%
\sbox\textbox{\par \vbox{%
\vskip\padding@top
\leftskip\padding@left%
\rightskip\padding@right%
\hsize \combo@textwidth%
\combofont%
\expandafter\csname\combo@textalign\endcsname
#2
\vskip\padding@bottom
\par
}%
}
}
\def\store@fontsize##1{%
\def\selected@fontsize{##1}}
% We iterate through all the size to get
% find an acceptable size that can fit in the box
\@for\next:=\font@size@list\do{%
\expandafter\set@text@size\next%
\next
% check and remeasure box
\combo@inbox
% \texttt{\expandafter\strip@prefix\meaning\next \the\ht\textbox}%
\if@ok
\ifdim\the\ht\textbox<\combo@textheight\relax
\@okfalse
%\fbox{\copy\textbox}\par%
\expandafter\store@fontsize\next
\fi
\fi
}
% if not found we have reached here with no solution
% better log an error and retry, by scaling the box
\if@ok\store@fontsize{\tiny} THIS IS IN ERROR \else \fi
\@oktrue
% We use the overpic package to set a backgroundgrid and
% to place the origin of the text box.
\vspace{1.5\baselineskip}
\centering
\begin{overpic}[width=\combo@imgwidth,
height=\combo@imgheight,
grid=\combo@grid,
tics=\combo@tics]{\combo@imageurl}%
\set@text@size\selected@fontsize
\combo@inbox
\put(\position@x,\the\dimexpr\position@y+\padding@bottom\relax){%
{\ifshowframe
\color{\combo@bordercolor}\fboxrule1pt\fbox{\copy\textbox}
\else
\color{red}\fboxrule0pt\fbox{\copy\textbox}
\fi
}%
}
\end{overpic}
}
\begin{document}
\combo[x=5pt,y=80pt,
padding-left=0pt,
padding-right=0pt,
padding-bottom=0pt,
text-color,
text-width=6cm,
text-height=5cm,
image-width=13cm,
image-height=7.5cm,
image-url=mandela,
tics,showframe=true,
border-color=yellow,
text-align=raggedright,
showframe=true,
showgrid=true,
border={border-color=blue}
]{Mandela has not made a public appearance since
the 2010 World Cup final in Johannesburg.}
\newpage
\combo[x=0pt,y=0pt,
padding-left=5pt,
padding-right=5pt,
text-color=yellow,
text-width=5cm,
text-height=5cm,
image-width=13cm,
image-height=9.5cm,
image-url=cardtrick,
tics, showframe=true,
]{\lipsum[2]}
\end{document}