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@@ -2,6 +2,31 @@ Note that since the application is still under construction, so not all screensh
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\section{Graphical presentation of the running algorithm}\label{sec:graphicalPresentationOfTheRunningAlgorithm}
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\TODO{under construction}
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+\TODO{reference~\ref{fig:animated}}
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+\begin{figure}[tp]
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+ \centering
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+ \includegraphics[width=0.6\linewidth]{img/example.jpg}
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+ \caption{A simple graph with 5 nodes after the four extremal layout have been computed, but not balanced yet.
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+ The vertical directions are down (upper row), up (lower row) and the horizontal directions are left (left column) and right (right column).
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+ The background colors of the nodes display which block they belong to: For example the two blue nodes on the top right are in the same block.
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+ Round nodes are the roots of the blocks.
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+ A colored circle on a node indicates the class that this node belongs to and is also the color of the topmost sink in the block graph.
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+ The node that is currently in the focus of the algorithm (whatever this means for the current stage) is highlighted with a grey square (here the node in the rightmost column on the bottom right).
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+ Although edges are not drawn during the node placement phase we added them here as straight lines to improve readability.}
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+ \label{fig:animated}
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+\end{figure}
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\section{User interface}\label{sec:userInterface}
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-\TODO{under construction}
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+Currently the only way to interact with the application is by keyboard events.
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+It is planned to add both additional commands as well as some kind of graphical interface, see chapter~\ref{ch:progress}.
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+
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+\begin{longtable}{|l|l|}
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+ \hline
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+ Key & Action \\\hline\hline
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+ Left arrow key & Perform one forward step of the algorithm. \\\hline
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+ Right arrow key & Perform one backward step (\enquote{undo one step}) of the algorithm. \\\hline
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+ P & Pause/unpause the automatic execution. Initially paused. \\\hline
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+ D & Print a debug table to standard out. \\\hline
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+ \caption{Overview over the currently available keyboard commands.}
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+ \label{table:keys}
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+\end{longtable}
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