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Note - when implementing edit tools for vector layer: All editation should be done between beginEditCommand() and endEditCommand() calls so that the operation are stored. Note - when doing changes inside QgsVectorLayer code: When doing any changes inside QgsVectorLayer they should be done using edit*() functions and _not_ directly e.g. mChangedGeometries[fid] = (...) otherwise the change won't be stored in the undo stack and it would lead to invalid behaviour of undo. git-svn-id: http://svn.osgeo.org/qgis/trunk@10920 c8812cc2-4d05-0410-92ff-de0c093fc19c