Tikzposter block with no content

Question

I want to use a tikzposter block as a title with no content inside the block. I am currently using:

\block{Proposed trajectory}{}

Which gives me:

However, I would like to have no white bar at all, just a blue bar with the title.

Answer 1

\documentclass{tikzposter}

\begin{document}

{
\colorlet{blockbodybgcolor}{blocktitlebgcolor}
\colorlet{blockbodyfgcolor}{white}
\block{}{\centering \bfseries \LARGE Proposed}
}
\end{document}

Answer 2

I think samcarter's answer makes the block a bit too big (If you want the banner to have the same hight as the banner on other blocks this will become a problem)

So I suggest defining a new block style:

\defineblockstyle{Justtitle}{
        }{
        \ifBlockHasTitle
                \draw[color=framecolor, fill=blocktitlebgcolor,
                rounded corners=\blockroundedcorners] (blocktitle.south west)
                rectangle (blocktitle.north east);
        \fi
}

and then using it before a banner only block, and using \useblockstyle{Default} after the title only block.

An example:

\documentclass{tikzposter}
\defineblockstyle{Justtitle}{
        }{
        \ifBlockHasTitle
                \draw[color=framecolor, fill=blocktitlebgcolor,
                rounded corners=\blockroundedcorners] (blocktitle.south west)
                rectangle (blocktitle.north east);
        \fi
}
\begin{document}

\block{otherblock}{}
\useblockstyle{Justtitle}
\block{bob}{}
\useblockstyle{Default}
\block{normal again}{}
\end{document}

Returns:

Where the height of the bob is the same as that of the otherblock and the normal again banner.