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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

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.

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tooBig.png
32 kB
29 Mar '17 02:43
tooSmall.png
3 kB
29 Mar '17 02:43
qtdiag.txt
7 kB
25 Aug '17 08:20
qtdiag2.txt
6 kB
28 Aug '17 06:04
qtbug59794.zip
2 kB
29 Aug '17 02:13
qtbug59794_diag.diff
0.4 kB
29 Aug '17 02:13
screenshot-1.png
24 kB
14 Oct '17 01:00
truncatedmenu.py
1 kB
11 Jul '19 22:45
truncatedmenu.py
1 kB
11 Jul '19 22:45
first-click.png
51 kB
11 Jul '19 22:46
second-click.png
43 kB
11 Jul '19 22:47

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

In Progress

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

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

Closed

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For Gerrit Dashboard: QTBUG-59794
#	Subject	Branch	Project	Status	CR	V
203545,1	QMenu: Fix size on high DPI + multi screen	dev	qt/qtbase	Status: ABANDONED	0	0
203551,7	QMenu: Fix size on high DPI + multi screen	5.9	qt/qtbase	Status: MERGED	+2	0
211988,4	QMenu: Corner case size fix (high DPI + multi screen)	5.9	qt/qtbase	Status: MERGED	+2	0
262490,4	QMenu size fix - Mark items dirty on screen change	5.12	qt/qtbase	Status: MERGED	+2	0