D17120: Implement zooming with Ctrl+mouse wheel

[Yuri Chornoivan]

yurchor created this revision.
yurchor added a reviewer: KDE Edu.
Herald added projects: KDE Edu, Documentation.
Herald added subscribers: kde-doc-english, kde-edu.
yurchor requested review of this revision.

REVISION SUMMARY
  BUG: 159772
  
  https://bugs.kde.org/show_bug.cgi?id=159772
  
  Adopted patch by David Benjamin + some minor documentation.

TEST PLAN
  1. Plot something.
  2. Use Ctrl+mouse wheel to zoom in/out.
  3. Use toolbar or menu to zoom in/out.

REPOSITORY
  R334 KmPlot

REVISION DETAIL
  https://phabricator.kde.org/D17120

AFFECTED FILES
  doc/index.docbook
  kmplot/view.cpp
  kmplot/view.h

To: yurchor, #kde_edu
Cc: kde-edu, kde-doc-english, skadinna, narvaez, apol
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