D22200: Column observer

[Martin Marmsoler]

Murmele created this revision.
Murmele added a reviewer: asemke.
Murmele added a project: LabPlot.
Herald added a project: KDE Edu.
Herald added a subscriber: kde-edu.
Murmele requested review of this revision.

REVISION SUMMARY
  If a column is deleted the combobox in the curve dock shows again the name of the column, but is marked red. So the user knows the column has removed, but if a column with the same name is created/imported it will connected to the curve.

REPOSITORY
  R262 LabPlot

REVISION DETAIL
  https://phabricator.kde.org/D22200

AFFECTED FILES
  src/CMakeLists.txt
  src/backend/core/AbstractColumn.h
  src/backend/core/AbstractSimpleFilter.cpp
  src/backend/core/AbstractSimpleFilter.h
  src/backend/core/AspectTreeModel.cpp
  src/backend/core/ColumnObserver.cpp
  src/backend/core/ColumnObserver.h
  src/backend/core/Project.cpp
  src/backend/core/Project.h
  src/backend/core/column/Column.cpp
  src/backend/core/column/Column.h
  src/backend/core/column/ColumnStringIO.cpp
  src/backend/core/column/ColumnStringIO.h
  src/backend/worksheet/plots/cartesian/XYCurve.cpp
  src/backend/worksheet/plots/cartesian/XYCurve.h
  src/commonfrontend/widgets/TreeViewComboBox.cpp
  src/commonfrontend/widgets/TreeViewComboBox.h
  src/kdefrontend/dockwidgets/XYCurveDock.cpp

To: Murmele, asemke
Cc: kde-edu, narvaez, apol
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