FreeCAD: staging 8026ff13

Author Committer Branch Timestamp Parent
Zheng, Lei Zheng, Lei staging 2019-06-29 09:36:37 staging 9dd5392f
Changeset Spreadsheet: convert PropertySheet to link type property

PropertySheet is changed to derive from PropertyExpressionContainer,
which makes it a link type property that is capable of external linking.
It now relies on the unified link property API to manage object
depenency, and tracking of object life time, relabeling, etc.

This patch also includes various fix and improvement of Spreadsheet,
such as improved recompute efficiency, correct handling of document
label change, etc.
mod - src/Mod/Spreadsheet/App/Cell.cpp Diff File
mod - src/Mod/Spreadsheet/App/Cell.h Diff File
mod - src/Mod/Spreadsheet/App/PropertySheet.cpp Diff File
mod - src/Mod/Spreadsheet/App/PropertySheet.h Diff File
mod - src/Mod/Spreadsheet/App/Sheet.cpp Diff File
mod - src/Mod/Spreadsheet/App/Sheet.h Diff File