Bug 424015

Summary:	Un-maximizing main window that opened on second screen with different high-DPI scaling restores to massive size
Product:	[Applications] krita	Reporter:	Ralek Kolemios <info>
Component:	General	Assignee:	Krita Bugs <krita-bugs-null>
Status:	CONFIRMED ---
Severity:	normal	CC:	alvin, tamtamy.tymona
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Ralek Kolemios 2020-07-09 03:31:24 UTC

When Krita is maximized, dragging the title bar in order to move the window to another screen will automatically resize Krita to close to 10,000 pixels wide, spanning across all 4 of my screens. It's nearly impossible, if not a huge hassle, to resize Krita back down to a reasonable size. This seems to happen on all releases.

Some specific details about my setup in case it's non-reproducible elsewhere:
Display 1: Cintiq 24 Pro, 3840x2160, 225% scaling
Display 2: generic monitor, 2560x1440, 100% scaling [Main display]
Display 3: generic monitor, 2560x1440, 100% scaling
Display 4: generic monitor, 2560x1440, 100% scaling

The issue happens if krita is dragged out of fullscreen from any monitor, most of the time. Sometimes it doesn't. Sometimes it gets really thin and really long. Sometimes it only happens when dragging between different scaling percentages.

Comment 1 Tiar 2021-08-24 14:40:19 UTC

Does it not happen for other programs? (I guess not, but I'm asking since I would guess a dragging from a fullscreen is not something one do with every program). Especially Qt-based ones like Kdenlive?

Comment 2 Alvin Wong 2021-08-26 13:01:17 UTC

I'm marking this as confirmed because I know that this can happen due to QMainWindow::saveState and restoreState not handling devicePixelRatio correctly. Fixing this would probably require hacking into Qt's code though.

Comment 3 Alvin Wong 2021-08-26 13:11:43 UTC

Or rather, it should be QWidget::saveGeometry and QWidget::restoreGeometry

Comment 4 Ralek Kolemios 2021-08-26 17:54:30 UTC

(In reply to Tiar from comment #1)
> Does it not happen for other programs? (I guess not, but I'm asking since I
> would guess a dragging from a fullscreen is not something one do with every
> program). Especially Qt-based ones like Kdenlive?

I've seen  it happen with one or two other programs over the years, but they seem to be issues with those specific programs and not with the OS' handling of windows in general as other applications are fine.