extravio de legenda com tikzpicture

Question

Estou tendo problemas com a colocação de sublegendas \subfloatao usar o tikzpicture.

Aqui está meu MWE:

\documentclass[a4paper,
               11pt,
               ngerman]{scrreprt}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[ngerman]{babel}
\usepackage{graphicx}
\usepackage{subfig}
\usepackage{caption}

\setkomafont{captionlabel}{\small\bfseries}
\setkomafont{caption}{\small}
\setcapindent{0em}
\setcapwidth{0.9\textwidth}
\captionsetup[subfigure]{font={footnotesize},labelfont={bf,footnotesize}}

\usepackage{tikz}
\usetikzlibrary{trees}
\usetikzlibrary{decorations.pathmorphing}
\usetikzlibrary{decorations.markings}
\usetikzlibrary{patterns}
\usetikzlibrary{arrows}

\begin{document}

\tikzset{
    momentum/.style={postaction={decorate},
decoration={markings, mark=at position 1 with {\arrow[scale=0.8]{>}}}},
}

\begin{figure}[tb]
\subfloat[Winkel zwischen 1 und 3 am kleinsten]{
  \centering
  \begin{tikzpicture}[font=\small,scale=0.3]
    \centering
      \draw[momentum](5,5)--(5,1);
      \node[anchor=north]at(5,1){2};
      \draw[momentum](5,5)--(4,9);
      \node[anchor=east]at(4,9){1};
      \draw[momentum](5,5)--(6,9);
      \node[anchor=west]at(6,9){3};
  \end{tikzpicture}
} \hspace{1cm}
\subfloat[Winkel zwischen 2 und 3 am kleinsten]{
  \centering
  \begin{tikzpicture}[font=\small,scale=0.3]
    \centering
      \draw[momentum](5,5)--(5,1);
      \node[anchor=north]at(5,1){1};
      \draw[momentum](5,5)--(4,9);
      \node[anchor=east]at(4,9){2};
      \draw[momentum](5,5)--(6,9);
      \node[anchor=west]at(6,9){3};
  \end{tikzpicture}
} \hspace{1cm}
\subfloat[Alle Winkel etwa gleich groß]{
  \centering
  \begin{tikzpicture}[font=\small,scale=0.3]
    \centering
      \draw[momentum](5,5)--(5,1);
      \node[anchor=north]at(5,1){1};
      \draw[momentum](5,5)--(1,8);
      \node[anchor=east]at(1,8){2};
      \draw[momentum](5,5)--(9,8);
      \node[anchor=west]at(9,8){3};
  \end{tikzpicture} }
\caption{Bildunterschrift}
\end{figure}

\end{document}

Ele compila, mas as sublegendas que defini \subfloat[...]estão mal posicionadas:

Estou completamente perdido neste ponto, já que usar exatamente o mesmo código na classe beamer funciona perfeitamente bem.

Quero evitar usar os pacotes subfigureou subcaption. Li em algum lugar que poderia ser uma boa ideia agrupar os subflutuantes em minipáginas, mas não funcionou.

Alguma idéia sobre isso?

editar Encontrei uma solução que funciona para mim usando as dicas de @Troy e @John_Kormylo. Comentei \setcapwidth{0.9\textwidth}e adicionei a todas as figuras e tabelas, exceto aquelas onde uso o tikzpicture... Colocar \setcapwidth{\textwidth}dentro dos subfloats problemáticos não mudou nada.

Answer 1

As classes KOMA não são realmente compatíveis com subfig. Você pode usar subcaptionem seu lugar.

\documentclass[
  a4paper,
  11pt,
  ngerman
]{scrreprt}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[ngerman]{babel}
\usepackage{graphicx}
\usepackage{caption,subcaption}

\setkomafont{captionlabel}{\small\bfseries}
\setkomafont{caption}{\small}
\setcapindent{0em}
\setcapwidth{0.9\textwidth}
\captionsetup[subfigure]{font={footnotesize},labelfont={bf,footnotesize}}

\usepackage{tikz}
\usetikzlibrary{trees}
\usetikzlibrary{decorations.pathmorphing}
\usetikzlibrary{decorations.markings}
\usetikzlibrary{patterns}
\usetikzlibrary{arrows}

\tikzset{
  momentum/.style={
    postaction={decorate},
    decoration={
      markings,
      mark=at position 1 with {\arrow[scale=0.8]{>}},
    },
  },
}

\begin{document}

\begin{figure}[tb]

\begin{subfigure}[b]{.3\textwidth}
\centering
\begin{tikzpicture}[font=\small,scale=0.3]
  \draw[momentum](5,5)--(5,1);
  \node[anchor=north]at(5,1){2};
  \draw[momentum](5,5)--(4,9);
  \node[anchor=east]at(4,9){1};
  \draw[momentum](5,5)--(6,9);
  \node[anchor=west]at(6,9){3};
\end{tikzpicture}
\caption{Winkel zwischen 1 und 3 am kleinsten}
\end{subfigure}\hfill
\begin{subfigure}[b]{.3\textwidth}
\centering
\begin{tikzpicture}[font=\small,scale=0.3]
  \draw[momentum](5,5)--(5,1);
  \node[anchor=north]at(5,1){1};
  \draw[momentum](5,5)--(4,9);
  \node[anchor=east]at(4,9){2};
  \draw[momentum](5,5)--(6,9);
  \node[anchor=west]at(6,9){3};
\end{tikzpicture}
\caption{Winkel zwischen 2 und 3 am kleinsten}
\end{subfigure}\hfill
\begin{subfigure}[b]{.3\textwidth}
\centering
\begin{tikzpicture}[font=\small,scale=0.3]
  \draw[momentum](5,5)--(5,1);
  \node[anchor=north]at(5,1){1};
  \draw[momentum](5,5)--(1,8);
  \node[anchor=east]at(1,8){2};
  \draw[momentum](5,5)--(9,8);
  \node[anchor=west]at(9,8){3};
\end{tikzpicture}
\caption{Alle Winkel etwa gleich groß}
\end{subfigure}

\caption{Bildunterschrift}
\end{figure}

\end{document}

Answer 2

\setcapdynwidthDesde a versão 3.20 do KOMA-Script você pode usar \setcapwidth. Da documentação do KOMA-Script:

Observe que \setcapwidthdefine widthimediatamente o valor da largura do parâmetro, como \setlengthfaria. Se você quiser o valor de widthquando a legenda é definida, poderá usar \setcapdynwidth. Pode haver diferenças no resultado, se você, por exemplo, usar comprimentos como \linewidthou outros comandos como argumento width.

\documentclass[a4paper,
               11pt,
               ngerman]{scrreprt}[2016/05/10]
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[ngerman]{babel}
\usepackage{graphicx}
\usepackage{subfig}
\usepackage{caption}

\setkomafont{captionlabel}{\small\bfseries}
\setkomafont{caption}{\small}
\setcapindent{0em}
\setcapdynwidth{0.9\textwidth}% <- changed, needs KOMA-Script version 3.20
\captionsetup[subfigure]{font={footnotesize},labelfont={bf,footnotesize}}

\usepackage{tikz}
\usetikzlibrary{trees}
\usetikzlibrary{decorations.pathmorphing}
\usetikzlibrary{decorations.markings}
\usetikzlibrary{patterns}
\usetikzlibrary{arrows}

\begin{document}

\tikzset{
    momentum/.style={postaction={decorate},
decoration={markings, mark=at position 1 with {\arrow[scale=0.8]{>}}}},
}

\begin{figure}[tb]
\subfloat[Winkel zwischen 1 und 3 am kleinsten]{
  \centering
  \begin{tikzpicture}[font=\small,scale=0.3]
    \centering
      \draw[momentum](5,5)--(5,1);
      \node[anchor=north]at(5,1){2};
      \draw[momentum](5,5)--(4,9);
      \node[anchor=east]at(4,9){1};
      \draw[momentum](5,5)--(6,9);
      \node[anchor=west]at(6,9){3};
  \end{tikzpicture}
} \hspace{1cm}
\subfloat[Winkel zwischen 2 und 3 am kleinsten]{
  \centering
  \begin{tikzpicture}[font=\small,scale=0.3]
    \centering
      \draw[momentum](5,5)--(5,1);
      \node[anchor=north]at(5,1){1};
      \draw[momentum](5,5)--(4,9);
      \node[anchor=east]at(4,9){2};
      \draw[momentum](5,5)--(6,9);
      \node[anchor=west]at(6,9){3};
  \end{tikzpicture}
} \hspace{1cm}
\subfloat[Alle Winkel etwa gleich groß]{
  \centering
  \begin{tikzpicture}[font=\small,scale=0.3]
    \centering
      \draw[momentum](5,5)--(5,1);
      \node[anchor=north]at(5,1){1};
      \draw[momentum](5,5)--(1,8);
      \node[anchor=east]at(1,8){2};
      \draw[momentum](5,5)--(9,8);
      \node[anchor=west]at(9,8){3};
  \end{tikzpicture} }
\caption{Bildunterschrift}
\end{figure}

\end{document}

Resultado: