Review Request: Add frame preview support (aka PNG/SVG Previews)

[Dan Leinir Turthra Jensen]

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http://git.reviewboard.kde.org/r/102512/
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(Updated Sept. 15, 2011, 8:36 a.m.)


Review request for Calligra.


Changes
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1. Attempted to fix background issue
2. Lost image issue is is an unrelated bug (both slides are rendered wrongly, just wrong in a different way, and such this really shouldn't be blocking this patch - see https://bugs.kde.org/show_bug.cgi?id=281932 )
3. Not attempted to fix this - will discuss on IRC

Also, whitespace fixes throughout and privated some functions which should be private (suggested by Jan)


Summary
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Add the ability to use previews for frames with unsupported formats. It will show the embedded objects in order of preference. If the first object is not recognised, the new Unavail shape will be used, which will then try the other options in turn, and for each attempt to load a Picture shape, and upon success it will load the data and disable the Picture shape's tools (to avoid confusion etc). Finally, if no object is recognised, a question mark image is shown, to indicate that the object is unknown.

Work done by Inge Wallin and Dan Leinir Turthra Jensen.


Diffs (updated)
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  libs/flake/KoShapeRegistry.cpp a65b1c9 
  libs/flake/KoUnavailShape.h fb346f7 
  libs/flake/KoUnavailShape.cpp c9bfc77 

Diff: http://git.reviewboard.kde.org/r/102512/diff


Testing
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compiled, run and functionality tested by ingwa


Thanks,

Dan Leinir Turthra

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