D21416: Add icons for line annotation arrow styles to combo box

[Tobias Deiminger]

tobiasdeiminger created this revision.
Herald added a project: Okular.
Herald added a subscriber: okular-devel.
tobiasdeiminger requested review of this revision.

REVISION SUMMARY
  Use `LineAnnotPainter` to generate accurate icons.
  
  Depends on D21248 <https://phabricator.kde.org/D21248>

TEST PLAN
  - open "Edit annotation tool" for straight line and check combo box items for start and stop style
  - test on HiDPI

REPOSITORY
  R223 Okular

BRANCH
  feature/lineannoticons

REVISION DETAIL
  https://phabricator.kde.org/D21416

AFFECTED FILES
  ui/annotationwidgets.cpp
  ui/annotationwidgets.h

To: tobiasdeiminger
Cc: okular-devel, joaonetto, tfella, ngraham, darcyshen, aacid
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