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Stefan Majewsky authored
Components are divided into data components (metadata, contents, creation context) and storage components (archive file, directory, ...). They can be casted into each other (e.g. an archive file can be unpacked into a directory, then metadata and contents can be read from there). The advantage of this method is that all these casts execute in a inherently multi-threaded runtime environment. (That's basically the whole task of the Puzzle class.) It will also allow to do more things with less code in a more consistent way, because complex operations can be broken up into multiple relatively simple casts. In the moment, quite some things run in parallel because only the scene uses the new Puzzle class (as a proof of concept), the collection and interface still relies on OldPuzzle. svn path=/trunk/KDE/kdegames/palapeli/; revision=1225950
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