Ytukyg

is it possible to create a new rectangle tikzstyle with arrows arround it? Like this...

Thank you

with append after command you can define "new" box shape with arrow:

    documentclass[tikz, margin=3mm]{standalone}

    usetikzlibrary{arrows.meta}



    begin{document}

        begin{tikzpicture}[

    arrowsbox/.style = {text width=#1, align=center, inner sep=2mm,

        append after command={pgfextra{letLNtikzlastnode

            draw[thick, -Triangle, shorten >=2mm, shorten <=1mm] 

            (LN.north west) edge (LN.north east) 

            (LN.north east) edge (LN.south east)

            (LN.south east) edge (LN.south west)

            (LN.south west)  to  (LN.north west);}

                            }

                        }% end of arrowsbox style

                            ]

    node[arrowsbox=44mm] {some text\some text\[1ex] some test\some text};

        end{tikzpicture}

    end{document}

One way is to use arrows to draw around a rectangular node.

documentclass[border=3mm]{standalone}

usepackage{tikz}

usetikzlibrary{arrows}

tikzset{arw/.style={-triangle 60,line width=1pt,shorten <= 4pt}}

begin{document}

begin{tikzpicture}

node[text width=3cm,align=center,name=rect] at (0,0) {textbf{For each design} \ this.. \ $alpha=beta$};

draw[arw] (rect.south west) -- (rect.north west);

draw[arw] (rect.north west) -- (rect.north east);

draw[arw] (rect.north east) -- (rect.south east);

draw[arw] (rect.south east) -- (rect.south west);

end{tikzpicture}

end{document}

A node style arrowed which uses path picture to draw the arrows.

documentclass[tikz,border=3.14mm]{standalone}

begin{document}

begin{tikzpicture}[arrowed/.style={inner sep=6pt,path picture={

draw[-latex,#1] ([xshift=2pt,yshift=-2pt]path picture bounding box.north west)

-- ([xshift=-2pt,yshift=-2pt]path picture bounding box.north east);

draw[-latex,#1] ([xshift=-2pt,yshift=-2pt]path picture bounding box.north east)

-- ([xshift=-2pt,yshift=2pt]path picture bounding box.south east);

draw[-latex,#1] ([xshift=-2pt,yshift=2pt]path picture bounding box.south east)

-- ([xshift=2pt,yshift=2pt]path picture bounding box.south west);

draw[-latex,#1] ([xshift=2pt,yshift=-2pt]path picture bounding box.north west)

-- ([xshift=-2pt,yshift=-2pt]path picture bounding box.north east);

draw[-latex,#1] ([xshift=2pt,yshift=2pt]path picture bounding box.south west)

-- ([xshift=2pt,yshift=-2pt]path picture bounding box.north west);

}}]

node[arrowed] at (0,0) {some text};

node[arrowed={thick,-stealth}] at (3,0) {some more text};

node[arrowed={thick,stealth-,shorten >=1pt}] at (6,0) {even more text};

node[anchor=north,arrowed={thick,-stealth,shorten >=1pt},inner sep=10pt,

align=center] at (3,-1)

{textbf{emph{For each design choice:}}\[2mm]

1 -- do something\ really cool and\ smart\[1mm]

2 -- make sure that\ hibernation time\ is over

};

end{tikzpicture}

end{document}

Just for fun: a version of Zarko's answer but without pgfextra. Why do I care about pgfextra? Because on p. 162 the pgfmanual says about pgfextra: "Note that this operation should only be used by real experts and should only be used deep inside clever macros, not on normal paths." It is really easy to get rid of the pgfextra. It is certainly not needed for append after command.

documentclass[tikz,border=3.14mm]{standalone}

begin{document}

    begin{tikzpicture}[my arrow/.style={thick, -latex, shorten >=2mm,

    shorten <=1mm},

arrowsbox/.style = { align=center, inner sep=2mm,

    append after command={[every edge/.append style={my arrow,#1}]     

        (tikzlastnode.north west) edge (tikzlastnode.north east) 

        (tikzlastnode.north east) edge (tikzlastnode.south east)

        (tikzlastnode.south east) edge (tikzlastnode.south west)

        (tikzlastnode.south west) edge  (tikzlastnode.north west)

                        }

                    }

                        ]

node[arrowsbox={red},inner sep=10pt,blue] {textbf{emph{For each design choice:}}\[2mm]

1 -- do something\ really cool and\ smart\[1mm]

2 -- make sure that\ hibernation time\ is over};

    end{tikzpicture}

end{document}