Tukukkk

I have made a flowchart in Tikz, where for the trapezoid (in/output) box I used the following command:

usepackage{tikz}

usetikzlibrary{shapes.geometric, arrows}

tikzstyle{io} = [trapezium, trapezium left angle=70, trapezium right angle=110, minimum width=3cm, minimum height=1cm, text centered, text width=3cm, draw=black, fill=blue!30]

The problem here is, I think, the text width parameter, because if I remove that the output box (see pictures) is fine, but the lines on the input are not wide enough. I call the output trapezoid as follows:

node (out1) [io, below of=pro3, yshift=-0.5cm, xshift=0.5] {Output result};

Resulting in an overly wide trapezoid, well beyond the required minimum of 3cm.

Changing the command to

node (out1) [io, below of=pro3, yshift=-0.5cm, xshift=0.5] {Output result\~};

i.e. adding a linebreak and a non-breaking space sets the width of the trapezoid correctly, but that now has a pointless empty line, which makes the text no longer vertically centred in the box.

How can I get this second trapezoid to be of the correct (3cm) width, without forcing an empty line into it?

MCVE:

documentclass[twoside]{report}

usepackage{mathrsfs,amsmath}

%%%%%%%%%% TIKZ OPTIONS %%%%%%%%%%%%%%

usepackage{tikz}

usetikzlibrary{shapes.geometric, arrows}

tikzstyle{startstop} = [rectangle, rounded corners, minimum width=3cm, minimum height=1cm,text centered, text width=3cm, draw=black, fill=red!30]

tikzstyle{io} = [trapezium, trapezium left angle=70, trapezium right angle=110, minimum width=3cm, minimum height=1cm, text centered, text width=3cm, draw=black, fill=blue!30]

tikzstyle{process} = [rectangle, minimum width=3cm, minimum height=1cm, text centered, text width=3cm, draw=black, fill=orange!30]

tikzstyle{decision} = [diamond, minimum width=3cm, minimum height=1cm, text centered,draw=black, text width=2cm, fill=green!30]

tikzstyle{arrow} = [thick,->,>=stealth]

newcommand{vect}[1]{mathbf{#1}}

newcommand{matr}[1]{mathbf{#1}}

begin{document}



begin{tikzpicture}

node (in1) [io] {Input:\ $dt,nt,nx$ (scalars);\ $vect{x},vect{p}$ (vectors);\ $matr{p}$ (data)};

node (out1) [io, below of=in1, yshift=-0.5cm, xshift=0.5] {Output result};

end{tikzpicture}



begin{tikzpicture}

node (in1) [io] {Input:\ $dt,nt,nx$ (scalars);\ $vect{x},vect{p}$ (vectors);\ $matr{p}$ (data)};

node (out1) [io, below of=in1, yshift=-0.5cm, xshift=0.5] {Output result\~};

end{tikzpicture}



end{document}

I copied most of the code of this tutorial and tried to adapt it to my needs.

I am using TeXStudio 2.12.4 on Windows 7 with PdfLaTeX.

This is pdfTeX, Version 3.1415926-2.5-1.40.14 (MiKTeX 2.9 64-bit) (preloaded format=pdflatex 2018.3.14)

Just add trapezium stretches=true (and use tikzset instead of tikzstyle).

documentclass[twoside]{report}

usepackage{mathrsfs,amsmath}

%%%%%%%%%% TIKZ OPTIONS %%%%%%%%%%%%%%

usepackage{tikz}

usetikzlibrary{shapes.geometric, arrows}

tikzset{startstop/.style={rectangle, rounded corners, minimum width=3cm, minimum height=1cm,text centered, text width=3cm, draw=black, fill=red!30},

io/.style={trapezium, trapezium left angle=70, trapezium right angle=110,

minimum width=3cm, minimum height=1cm, text centered, text width=3cm,

draw=black, fill=blue!30,trapezium stretches=true}, %<- added

process/.style={rectangle, minimum width=3cm, minimum height=1cm, text centered, text width=3cm, draw=black, fill=orange!30},

decision/.style={diamond, minimum width=3cm, minimum height=1cm, text

centered,draw=black, text width=2cm, fill=green!30},

arrow/.style={thick,->,>=stealth}}

newcommand{vect}[1]{mathbf{#1}}

newcommand{matr}[1]{mathbf{#1}}

begin{document}



begin{tikzpicture}

node (in1) [io] {Input:\ $dt,nt,nx$ (scalars);\ $vect{x},vect{p}$ (vectors);\ $matr{p}$ (data)};

node (out1) [io, below of=in1, yshift=-0.5cm, xshift=0.5] {Output result};

end{tikzpicture}



begin{tikzpicture}

node (in1) [io] {Input:\ $dt,nt,nx$ (scalars);\ $vect{x},vect{p}$ (vectors);\ $matr{p}$ (data)};

node (out1) [io, below of=in1, yshift=-0.5cm, xshift=0.5] {Output result\~};

end{tikzpicture}



end{document}