Arrows and nodes in TikZ

Question

I wish to draw arrows not necessarily at the end of the line, nor in the middle. I would also like to write a node directly above (or below, or to the right, ...) the arrow.

I saw this question, but it doesn't answer all my questions - first of all, it puts the arrow in the middle of the line. I know I can modify that by playing with mark=at position 0.5, but it's very possible that I'd like a certain position in one line, and a different in the other, i.e. use \draw[mystyle 0.5] for the middle, \draw[mystyle 0.75] for having it three-quarters way through etc.. In addition it doesn't solve the nodes issue.

Can anyone give me a hand please?

Answer 1

Based on our discussion I think the following style definition does the trick.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{decorations.markings}
\begin{document}

\begin{tikzpicture}
[
nodewitharrow/.style 2 args={                
            decoration={             
                        markings,   
                        mark=at position {#1} with { 
                                    \arrow{>},
                                    \node[transform shape,above] {#2};
                        }
            },
            postaction={decorate}
}
]

\draw[nodewitharrow={0.6}{Node text},nodewitharrow={0.2}{Second}] (0,0) -- (4,3) ;
\draw[nodewitharrow={0.75}{\tiny Tiny}] (0,0) (4,0) arc (0:60:2);
\end{tikzpicture}
\end{document}

Note that you can apply more than once. If you want to change orientation of the text, you can further define a third argument for extra node options e.g. selecting above,below,right, left etc.