[Tex/LaTex] How to create a filled colored box in Beamer

beamerboxescolor

I'm creating a presentation with Beamer, and I want to include a text that will be inside a filled colored box. At first I thought creating the filled colored box using TikZ, and I have the following:

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{positioning}

\begin{document}

\begin{frame}{Test}

\begin{center}
  \begin{tikzpicture}
    \node[preaction={fill=cyan,fill opacity=0.5},rounded corners=1ex,font=\fontsize{12pt}{12pt}\itshape] {This is a \textcolor{blue}{\textbf{very}}, \textcolor{red}{\textbf{long}} and \textcolor{blue}{\textbf{stupid}} \\line of text without purpose};
  \end{tikzpicture}
\end{center}
\end{frame}

\end{document}

The problem is that because my sentence is kind of long, I wanted to put half of in the new line using \\, but it gives me an error. Any idea how to circumvent the problem, or create what I want in another way?

Best Answer

The 'shortest' example to show the basic usage of beamercolorbox.

Please note that there are 'better/nicer' boxes such as beamerboxrounded or tcolorbox package to produce such setup.

\documentclass{beamer}

\usepackage{blindtext}
\begin{document}
\begin{frame}{Foo}
  \setbeamercolor{coloredboxstuff}{fg=yellow,bg=white!10!blue}
  \begin{beamercolorbox}[wd=0.9\textwidth,sep=1em]{coloredboxstuff}
    \blindtext
    \end{beamercolorbox}
\end{frame}
\end{document}

Related Solutions

[Tex/LaTex] Preparing a beamer poster: how to create a border box

I have finally managed to do this with the double and double distance parameters of a tkiz style:

\definecolor{ltsiBlue1}{rgb}{0.0,0.4,1.0} % #0066ff
\tikzstyle{titlebox} = [draw=white, double=ltsiBlue1, double distance=2pt, 
                        fill=ltsiBlue1, line width=3pt, text=white, rectangle, 
                        inner sep=13pt, inner ysep=13pt]
\begin{tikzpicture}
\node [titlebox] (box){%
  Hello world
};
\end{tkizpicture}

Here is the output, after some heavy butchering of one of the examples of beamerposter

test output

[Tex/LaTex] How to fix jumping TikZ pictures in beamer

I finally (!) got round to implementing this. Here's my code:

\documentclass{beamer}
% \url{http://tex.stackexchange.com/q/18704/86}
\usepackage{tikz}

\newcounter{jumping}
\resetcounteronoverlays{jumping}

\makeatletter
\tikzset{
  stop jumping/.style={
    execute at end picture={%
      \stepcounter{jumping}%
      \immediate\write\pgfutil@auxout{%
        \noexpand\jump@setbb{\the\value{jumping}}{\noexpand\pgfpoint{\the\pgf@picminx}{\the\pgf@picminy}}{\noexpand\pgfpoint{\the\pgf@picmaxx}{\the\pgf@picmaxy}}
      },
      \csname jump@\the\value{jumping}@maxbb\endcsname
      \path (\the\pgf@x,\the\pgf@y);
      \csname jump@\the\value{jumping}@minbb\endcsname
      \path (\the\pgf@x,\the\pgf@y);
    },
  }
}
\def\jump@setbb#1#2#3{%
  \@ifundefined{jump@#1@maxbb}{%
    \expandafter\gdef\csname jump@#1@maxbb\endcsname{#3}%
  }{%
    \csname jump@#1@maxbb\endcsname
    \pgf@xa=\pgf@x
    \pgf@ya=\pgf@y
    #3
    \pgfmathsetlength\pgf@x{max(\pgf@x,\pgf@xa)}%
    \pgfmathsetlength\pgf@y{max(\pgf@y,\pgf@ya)}%
    \expandafter\xdef\csname jump@#1@maxbb\endcsname{\noexpand\pgfpoint{\the\pgf@x}{\the\pgf@y}}%
  }
  \@ifundefined{jump@#1@minbb}{%
    \expandafter\gdef\csname jump@#1@minbb\endcsname{#2}%
  }{%
    \csname jump@#1@minbb\endcsname
    \pgf@xa=\pgf@x
    \pgf@ya=\pgf@y
    #2
    \pgfmathsetlength\pgf@x{min(\pgf@x,\pgf@xa)}%
    \pgfmathsetlength\pgf@y{min(\pgf@y,\pgf@ya)}%
    \expandafter\xdef\csname jump@#1@minbb\endcsname{\noexpand\pgfpoint{\the\pgf@x}{\the\pgf@y}}%
  }
}
\makeatother

\begin{document}
\begin{frame}
\begin{tikzpicture}[stop jumping]
\foreach \k in {1,...,7}
{
   \fill<\k>[orange] (0,0) circle[radius=.5];
   \fill<\k>[blue] (\k * 45:\k) circle[radius=.2] coordinate (a);
}
\draw (0,0) -- (a);
\end{tikzpicture}
\end{frame}

\end{document}

Here's how it works. We have a global counter, jumping, which is stable under overlays. That is, beamer implements overlays by reprocessing the code several times. Normally, each time through would lead to a counter being incremented, but so long as beamer is told, it can take that into account and resets the counter for each run through. The upshot of this is that this counter can be used to label (in the non-TeXnical sense) tikzpictures in such a way that the different copies of the picture on different slides get the same label.

We use that label to save the bounding box of each version of the picture to the aux file. We do this at the end of the picture to ensure that we get the right bounding box. When the aux file is read in next time, it computes the maximum and minimum extends of the various bounding boxes for this picture and saves these as PGF points. Back in the picture, we use these computed points to adjust our bounding box to the maximum extent.

Some further remarks:

We save the bounding box of each picture before comparing it with the saved maximum. This means that the maximum is always computed on the actual sizes of the pictures and doesn't take into account any previous maximum. This means that it is sensitive to changes in the picture, which is how it should be.
The bounding box is adjusted by placing coordinates in the picture. This is to ensure that the picture doesn't jump around inside its box. Simply resetting the bounding box lengths would ensure that the picture took up the same amount of space on each slide, but not that the picture stayed in the same place in that box.

Best Answer

Related Solutions

[Tex/LaTex] Preparing a beamer poster: how to create a border box

[Tex/LaTex] How to fix jumping TikZ pictures in beamer

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