Regression: Mouse cursor jumps to the left when keep clicking on the colour circle under Windows #109968

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Blender-King · 2023-07-11T15:19:31+02:00

Blender-King commented

2023-07-11 15:19:31 +02:00

System Information
Operating system: Windows 10, 21H2
Graphics card: Intel A770

Blender Version
Broken: 3.4, 3.6.0
Worked: 3.3

Short description of error
If I keep clicking random place in the colour circle, the mouse pointer randomly jumps to the left edge of the circle. This seems to be happening only under Windows, not under Linux.
I have only one Windows installation, so I am not sure if this would happen on other computers. Please check for it.

Exact steps for others to reproduce the error

Just keep clicking random places on the color circle for about 10 seconds. (See the attached screen recording.)

Not necessary: ~~I was using a 4K monitor with 200% scaling and Blender interface scaling was 1.0.~~

**System Information** Operating system: Windows 10, 21H2 Graphics card: Intel A770 **Blender Version** Broken: 3.4, 3.6.0 Worked: 3.3 **Short description of error** If I keep clicking random place in the colour circle, the mouse pointer randomly jumps to the left edge of the circle. This seems to be happening only under Windows, not under Linux. I have only one Windows installation, so I am not sure if this would happen on other computers. Please check for it. **Exact steps for others to reproduce the error** - Just keep clicking random places on the color circle for about 10 seconds. (See the attached screen recording.) Not necessary: ~~I was using a 4K monitor with 200% scaling and Blender interface scaling was 1.0.~~

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mouse-jump.mp4

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Blender-King added the

labels 2023-07-11 15:19:31 +02:00

Pratik Borhade commented

2023-07-12 05:04:37 +02:00

Hi, thanks for the report. Can confirm the regression.

Pratik Borhade added

and removed

labels 2023-07-12 05:05:04 +02:00

Pratik Borhade commented

2023-07-12 05:05:55 +02:00

Also noticed similar behavior when editing properties from redo panel

Guillermo Venegas commented

2023-07-28 04:16:49 +02:00

The error is in GHOST_SystemWin32::processCursorEvent, I found out that the screen_co mouse position can jump from one coordinate to another in some adjustments made inside the function

The error is in `GHOST_SystemWin32::processCursorEvent`, I found out that the `screen_co` mouse position can jump from one coordinate to another in some adjustments made inside the function ![image](/attachments/5c613a03-cab3-4a31-a2bd-fb0fa7ad5cf7)

image.png

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Pratik Borhade commented

2023-08-04 09:04:42 +02:00

Caused by 9fd6dae793
@ideasman42 ^

The error is in GHOST_SystemWin32::processCursorEvent

seems so.

Caused by 9fd6dae7939a65b67045749a0eadeb6864ded183 @ideasman42 ^ > The error is in GHOST_SystemWin32::processCursorEvent seems so.

Pratik Borhade changed title from ~~Mouse cursor jumps to the left when keep clicking on the colour circle under Windows~~ to Regression: Mouse cursor jumps to the left when keep clicking on the colour circle under Windows

2023-08-04 09:04:54 +02:00

Pratik Borhade added this to the 3.6 LTS milestone 2023-08-04 09:05:00 +02:00

Pratik Borhade commented

2023-08-04 09:12:54 +02:00

Also noticed similar behavior when editing properties from redo panel

Above bug is also caused by the same commit. Not sure if separate report is needed for it.
How to repro:

In default scene, add sphere
Expand redo panel
Change any int/flot property with click drag (cursor shifts to screen center)

> Also noticed similar behavior when editing properties from redo panel Above bug is also caused by the same commit. Not sure if separate report is needed for it. How to repro: - In default scene, add sphere - Expand redo panel - Change any int/flot property with click drag (cursor shifts to screen center)

Campbell Barton commented

2023-08-08 02:59:10 +02:00

@Blender-King is this related to the 200% scaling of your monitor? Does it happen if the monitor is not scaled?

At the moment I don't have a Win32 development system, and would like to have developers using Windows supporting this platform if at all possible.

Of course the commit that caused this can always be reverted however reverting both:

... re-introduces a bug in GHOST/Wayland and is just avoiding a bug/limitation in GHOST/Win32, accepting the underlying API's aren't reliable on some platforms, so I don't see this as a good long term solution.

My sense is GHOST/Win32 should be able to function in a similar way to X11 or macOS, as Guillermo points out, the issue may be a problem detecting wrapping.

@Blender-King is this related to the 200% scaling of your monitor? Does it happen if the monitor is not scaled? At the moment I don't have a Win32 development system, and would like to have developers using Windows supporting this platform if at all possible. Of course the commit that caused this can always be reverted however reverting both: - 9fd6dae7939a65b67045749a0eadeb6864ded183 - 4c4e8cc926a672ac60692b3fb8c20249f9cae679 ... re-introduces a bug in GHOST/Wayland and is just avoiding a bug/limitation in GHOST/Win32, accepting the underlying API's aren't reliable on some platforms, so I don't see this as a good long term solution. My sense is GHOST/Win32 should be able to function in a similar way to X11 or macOS, as Guillermo points out, the issue may be a problem detecting wrapping.

Harley Acheson self-assigned this 2023-08-08 04:53:45 +02:00

Harley Acheson commented

2023-08-08 04:57:33 +02:00

@Guillermo - nice work investigating this.

When I looked at this earlier I could recreate the complaint at will (multiple fast and short drags in the color circle). But I never found any odd values when this problem occurred. As in the event mouse position never suddenly changed. It didn't make a lot of sense to me.

Will do some debugging in GHOST_SystemWin32::processCursorEvent and hopefully can figure things out. Might ask you some questions if things don't make sense.

@Guillermo - nice work investigating this. When I looked at this earlier I could recreate the complaint at will (multiple fast and short drags in the color circle). But I never found any odd values when this problem occurred. As in the event mouse position never suddenly changed. It didn't make a lot of sense to me. Will do some debugging in GHOST_SystemWin32::processCursorEvent and hopefully can figure things out. Might ask you some questions if things don't make sense.

Blender-King commented

2023-08-08 07:12:59 +02:00

@Blender-King is this related to the 200% scaling of your monitor? Does it happen if the monitor is not scaled?

Yes. I installed 3.6.1, changed DPI of the monitor to 100%, started Blender (the resolution scale was 1.00) and mouse jumping still happened when I kept clicking random points on the colour circle.

> @Blender-King is this related to the 200% scaling of your monitor? Does it happen if the monitor is not scaled? > Yes. I installed 3.6.1, changed DPI of the monitor to 100%, started Blender (the resolution scale was 1.00) and mouse jumping still happened when I kept clicking random points on the colour circle.

Harley Acheson referenced a pull request that will close this issue

2023-08-08 21:54:53 +02:00

WIP: Fix #109968: Win32 Mouse Warp Bounds #110937

Campbell Barton referenced this issue

2023-08-09 02:08:26 +02:00

WIP: Fix #109968: Win32 Mouse Warp Bounds #110937

Pratik Borhade referenced this issue

2023-08-09 12:51:18 +02:00

WIP: Fix #109968: Win32 Mouse Warp Bounds #110937

Guillermo Venegas referenced a pull request that will close this issue

2023-08-10 19:51:05 +02:00

Fix #109968: Mouse warp relocates the cursor incorrectly on WIN32 #111020