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Problema com quebra de linha usando \\ no tikz

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Problema com quebra de linha usando \\ no tikz

Aqui está o meu código, que foi compilado por pdflatex.

\documentclass[11pt]{article}
\usepackage[a5paper,margin=5pt]{geometry}
\usepackage{amsmath,amssymb}
\usepackage{tikz-qtree}
\begin{document}
\begin{center}
\begin{tikzpicture}[scale=.6]\Tree
[.(0,0)
    [.(0,1)
        [.(1,1)
            [.(1,2)\\$\downarrow$\\(2,0)
                [.(3,0)
                    [.(4,0)\\$\downarrow$\\\textcolor{olive}{(1,3)} ]
                    [.\textcolor{olive}{(3,1)} ]
                ]
                [.\textcolor{cyan}{(2,1)} ]
            ]
            [.\textcolor{cyan}{(2,1)} ]
        ]
        [.(0,2)
            [.(0,3)
                [.(1,3)\\$\downarrow$\\\textcolor{purple}{(4,0)} ]
                [.\textcolor{purple}{(0,4)} ]
            ]
            [.(1,2)\\$\downarrow$\\(2,0)
                [.(3,0)
                    [.(4,0)\\$\downarrow$\\\textcolor{olive}{(1,3)} ]
                    [.\textcolor{olive}{(3,1)} ]
                ]
                [.\textcolor{cyan}{(2,1)} ]
            ]
        ]
    ]
    [.(1,0)
        [.(2,0)\\$\downarrow$\\(1,2)
            [.(1,3)\\$\downarrow$\\\textcolor{purple}{(4,0)} ]
            [.\textcolor{blue}{(2,2)} ]
        ]
        [.(1,1)
            [.(1,2)\\$\downarrow$\\(2,0)
                [.(3,0)
                    [.(4,0)\\$\downarrow$\\\textcolor{olive}{(1,3)} ]
                    [.\textcolor{olive}{(3,1)} ]
                ]
                [.\textcolor{cyan}{(2,1)} ]
            ]
            [.\textcolor{cyan}{(2,1)} ]
        ]
    ]
]
\end{tikzpicture}
\end{center}
\end{document}

De acordo com a documentação do pacote, é possível tikz-qtreeo uso de para quebra de linha em nós. \\Mas o código acima não pode ser compilado corretamente. Se eu mudar as partes que \\o contêm, funcionará.

Por que é tão? Como posso quebrar linhas em um nó?

Responder1

Parece que você não adicionou

\tikzset{every tree node/.style={align=center,anchor=north}}

depois

\begin{tikzpicture}[scale=.6]

antes de ligar \Tree. Também, por precaução, verifique \pgfversionse é> 2.1, como diz a documentação

\documentclass[11pt]{article}
\usepackage[a5paper,margin=5pt]{geometry}
\usepackage{amsmath,amssymb}
\usepackage{tikz-qtree}
\begin{document}
\begin{center}
\begin{tikzpicture}[scale=.6]
\tikzset{every tree node/.style={align=center,anchor=north}}
\Tree
[.(0,0)
    [.(0,1)
        [.(1,1)
            [.(1,2)\\$\downarrow$\\(2,0)
                [.(3,0)
                    [.(4,0)\\$\downarrow$\\\textcolor{olive}{(1,3)} ]
                    [.\textcolor{olive}{(3,1)} ]
                ]
                [.\textcolor{cyan}{(2,1)} ]
            ]
            [.\textcolor{cyan}{(2,1)} ]
        ]
        [.(0,2)
            [.(0,3)
                [.(1,3)\\$\downarrow$\\\textcolor{purple}{(4,0)} ]
                [.\textcolor{purple}{(0,4)} ]
            ]
            [.(1,2)\\$\downarrow$\\(2,0)
                [.(3,0)
                    [.(4,0)\\$\downarrow$\\\textcolor{olive}{(1,3)} ]
                    [.\textcolor{olive}{(3,1)} ]
                ]
                [.\textcolor{cyan}{(2,1)} ]
            ]
        ]
    ]
    [.(1,0)
        [.(2,0)\\$\downarrow$\\(1,2)
            [.(1,3)\\$\downarrow$\\\textcolor{purple}{(4,0)} ]
            [.\textcolor{blue}{(2,2)} ]
        ]
        [.(1,1)
            [.(1,2)\\$\downarrow$\\(2,0)
                [.(3,0)
                    [.(4,0)\\$\downarrow$\\\textcolor{olive}{(1,3)} ]
                    [.\textcolor{olive}{(3,1)} ]
                ]
                [.\textcolor{cyan}{(2,1)} ]
            ]
            [.\textcolor{cyan}{(2,1)} ]
        ]
    ]
]
\end{tikzpicture}
\end{center}
\end{document}

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