D25539: KScreen KCM: Add a revert timer to the settings page

[Zixing Liu]

liushuyu created this revision.
liushuyu added a reviewer: VDG.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
liushuyu requested review of this revision.

REVISION SUMMARY
  Add a revert timer and an option for the user to revert the settings when they accidentally messed up the settings and unable to see the screen.
  
  The current implementation is very rudimentary, a message box is shown and the text is static (no countdown in the dialog box).
  
  F7784367: 2019-11-25_20-46.png <https://phabricator.kde.org/F7784367>
  
  F7784366: 2019-11-25_20-46_1.png <https://phabricator.kde.org/F7784366>

TEST PLAN
  1. Open the System Settings and navigate to the "Display and Monitor" -> "Display Configuration."
  2. Change any settings and hit Apply.
  3. Don't click on the pop-up, wait for 10 seconds and see if the changes will be reverted and the dialog box closed.
  4. Repeat step 1 to step 2 and this time, click "cancel" and see if the changes will be reverted and the dialog box closed.
  5. Repeat step 1 to step 2 but this time click "save" and see if the changes will be saved and the dialog box closed, wait for 10 seconds to see if the changes are still retained.

REPOSITORY
  R104 KScreen

REVISION DETAIL
  https://phabricator.kde.org/D25539

AFFECTED FILES
  kcm/config_handler.cpp
  kcm/config_handler.h
  kcm/kcm.cpp
  kcm/kcm.h
  kcm/package/contents/ui/main.qml

To: liushuyu, #vdg
Cc: plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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