[Touch-packages] [Bug 1671853] Re: incorrect screen number reported by QDesktopWidget

[Alexander Bürger MET Norway]

"Backporting" the QDesktopWidget::screenNumber(QWidget*) function from
qtbase HEAD helped for this particular problem. Packages with an extra
patch (debian/patches/multiscreen-MET.diff) are available on launchpad:
ppa:met-norway/updates-met

While the main problem is solved, the popups are still placed completely
on one screen even if the combobox spans two screens. This is maybe a
rather unusual window placement. Solving this probably requires changes
to QDesktopWidget (screen number from widget corner) and QComboBox
(popup placement such that it may span adjacent screens while still
being completely visible without gap) and maybe other popups (QMenu?).

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https://bugs.launchpad.net/bugs/1671853

Title:
  incorrect screen number reported by QDesktopWidget

Status in qtbase-opensource-src package in Ubuntu:
  Confirmed

Bug description:
  Hi,

  we have a problem with combobox popups showing up on the wron screen.
  The system setup is: two displays à 1920x1200, one desktop, unity,
  xenial. On this system, the problem can be reproduced by running the
  stylesheet example from qtbase5-examples:

  start 
/usr/lib/x86_64-linux-gnu/qt5/examples/widgets/widgets/stylesheet/stylesheet
  move the main window to screen 2
  click "edit style..." in the menu to open the style editor
  move the style editor to screen 1
  click on the combo box
  the popup shows on the very left of screen 2, even if the combobox is on 
screen 1

  Actually the popup seems to always show up on the screen with the
  mainwindow.

  The problem seems to be that the patch debian/patches/multiscreen.diff
  does not work in this situation, it makes
  QApplication::desktop()->screenNumber(..combobox..) return the wrong
  screen. As far as I can tell, both the code for
  QDesktopWidget::screenNumber(const QWidget*) from the 5.5 and dev
  branches in Qt return the correct screen number in our situation.

  We would appreciate if debian/patches/multiscreen.diff could be
  updated.

  Best regards,

  Alexander

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[Touch-packages] [Bug 1671853] [NEW] incorrect screen number reported by QDesktopWidget

[Alexander Bürger MET Norway]

Public bug reported:

Hi,

we have a problem with combobox popups showing up on the wron screen.
The system setup is: two displays à 1920x1200, one desktop, unity,
xenial. On this system, the problem can be reproduced by running the
stylesheet example from qtbase5-examples:

start 
/usr/lib/x86_64-linux-gnu/qt5/examples/widgets/widgets/stylesheet/stylesheet
move the main window to screen 2
click "edit style..." in the menu to open the style editor
move the style editor to screen 1
click on the combo box
the popup shows on the very left of screen 2, even if the combobox is on screen 
1

Actually the popup seems to always show up on the screen with the
mainwindow.

The problem seems to be that the patch debian/patches/multiscreen.diff
does not work in this situation, it makes
QApplication::desktop()->screenNumber(..combobox..) return the wrong
screen. As far as I can tell, both the code for
QDesktopWidget::screenNumber(const QWidget*) from the 5.5 and dev
branches in Qt return the correct screen number in our situation.

We would appreciate if debian/patches/multiscreen.diff could be updated.

Best regards,

Alexander

** Affects: qtbase-opensource-src (Ubuntu)
 Importance: Undecided
 Status: New

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to qtbase-opensource-src in
Ubuntu.
https://bugs.launchpad.net/bugs/1671853

Title:
  incorrect screen number reported by QDesktopWidget

Status in qtbase-opensource-src package in Ubuntu:
  New

Bug description:
  Hi,

  we have a problem with combobox popups showing up on the wron screen.
  The system setup is: two displays à 1920x1200, one desktop, unity,
  xenial. On this system, the problem can be reproduced by running the
  stylesheet example from qtbase5-examples:

  start 
/usr/lib/x86_64-linux-gnu/qt5/examples/widgets/widgets/stylesheet/stylesheet
  move the main window to screen 2
  click "edit style..." in the menu to open the style editor
  move the style editor to screen 1
  click on the combo box
  the popup shows on the very left of screen 2, even if the combobox is on 
screen 1

  Actually the popup seems to always show up on the screen with the
  mainwindow.

  The problem seems to be that the patch debian/patches/multiscreen.diff
  does not work in this situation, it makes
  QApplication::desktop()->screenNumber(..combobox..) return the wrong
  screen. As far as I can tell, both the code for
  QDesktopWidget::screenNumber(const QWidget*) from the 5.5 and dev
  branches in Qt return the correct screen number in our situation.

  We would appreciate if debian/patches/multiscreen.diff could be
  updated.

  Best regards,

  Alexander

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1671853/+subscriptions

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