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Details

Type: Bug
Resolution: Done
Priority: P2: Important
Fix Version/s: 5.9.4, 5.12.4
Affects Version/s: 5.9.0 Beta 1, 5.9.1
Component/s: Widgets: Main Window
Labels:
- Reported_by_support_standard
Environment:
Windows 10 64 bit
Qt 5.9 Beta snapshot #424

Commits:
9ad0e09f5bbaab8ced2ea6bb175bbd13935413cf

Description

Have a primary UHD-screen scaled to 200% and a secondary FullHD-screen scaled to 100%.
Open the Main Window example.
It's in Examples\Qt-5.9\widgets\mainwindows\mainwindow\mainwindow.pro
At the very beginning of ~~main.cpp~~ the main function, add the line:
```
QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
```
Build and run the example.
Move the example's window to the secondary screen.
Right-click into one of the dock windows.
The appearing context menu is far too small:
Right-click into the same dock window again.
Now the context menu has the right size.
Move the example's window to the primary screen.
Right-click into one of the dock windows.
The appearing context menu is far too big:
Right-click into the same dock window again.
Now the context menu has the right size.

The context menus should always have the right size. With Qt 5.8 this used to work correctly.

Attachments

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first-click.png
12 Jul '19 05:46
51 kB
Marko Luther
qtbug59794_diag.diff
29 Aug '17 09:13
0.4 kB
Friedemann Kleint
qtbug59794.zip
29 Aug '17 09:13
2 kB
Friedemann Kleint
qtdiag.txt
25 Aug '17 15:20
7 kB
Robert Löhning
qtdiag2.txt
28 Aug '17 13:04
6 kB
Thorbjørn Lund Martsum
screenshot-1.png
14 Oct '17 08:00
24 kB
Carter Davies
second-click.png
12 Jul '19 05:47
43 kB
Marko Luther
tooBig.png
29 Mar '17 09:43
32 kB
Robert Löhning
tooSmall.png
29 Mar '17 09:43
3 kB
Robert Löhning
truncatedmenu.py
12 Jul '19 05:45
1 kB
Marko Luther
truncatedmenu.py
12 Jul '19 05:45
1 kB
Marko Luther

Issue Links

is duplicated by

QTBUG-62152 Menus have wrong size after the window has been moved to a monitor with a differnt DPI

Closed

relates to

QTBUG-64647 QQC Menu shows up on wrong display after changing primary display (adding/removing monitor to/from laptop via USB)

Closed

QTBUG-73231 When a menubar spans across displays using different DPIs then opening menus on either display can show the menu in the wrong place

Closed

resulted from

QTBUG-59484 [REG 5.8 -> 5.9] Windows: When showing a menu of app on secondary screen in HighRes/LowRes multimonitor setup with HighDpiScaling active, app gets stuck moving the menu between screens