Holding Ctrl right after trackpad scrolling makes unwanted zoom (OSX) #45167

New Issue

Kris Slazinski · 2015-06-24T00:28:02+02:00

Kris Slazinski commented

2015-06-24 00:28:02 +02:00

System Information
Operating system and graphics card
OSX 10.10.3, NVIDIA GeForce 320M 256 MB

Blender Version
Broken: 2.75 RC1 bff8b5d

Short description of error
Scrolling panels in Blender sometimes makes them zoom when user doesn't want it.

Exact steps for others to reproduce the error

Open default scene and press N to show Properties (this is what I have on screenshots, but it works the same with every panel).
Move 2 fingers on macbook's trackpad to scroll
Release fingers and immediately press and hold CTRL
Result: Blender zooms in or out depending on if you were scrolling up or down.

Please see attached images: before and after scrolling.

**System Information** Operating system and graphics card OSX 10.10.3, NVIDIA GeForce 320M 256 MB **Blender Version** Broken: 2.75 RC1 bff8b5d **Short description of error** Scrolling panels in Blender sometimes makes them zoom when user doesn't want it. **Exact steps for others to reproduce the error** 1. Open default scene and press N to show Properties (this is what I have on screenshots, but it works the same with every panel). 2. Move 2 fingers on macbook's trackpad to scroll 3. Release fingers and immediately press and hold CTRL 4. Result: Blender zooms in or out depending on if you were scrolling up or down. Please see attached images: before and after scrolling. ![zoom-1.png](https://archive.blender.org/developer/F197003/zoom-1.png) ![zoom-2.png](https://archive.blender.org/developer/F197004/zoom-2.png)

Kris Slazinski commented

2015-06-24 00:28:02 +02:00

Changed status to: 'Open'

Kris Slazinski commented

2015-06-24 00:28:02 +02:00

Added subscriber: @mallow

Kris Slazinski commented

2015-06-24 00:28:15 +02:00

This thing happens not only to panels, but also in 3D View, as I just checked.

Campbell Barton changed title from ~~using Ctrl right after scrolling makes unwanted zoom~~ to Holding Ctrl right after trackpad scrolling makes unwanted zoom (OSX)

2015-06-24 05:28:56 +02:00

Francesco Siddi commented

2015-06-24 15:08:59 +02:00

Added subscriber: @fsiddi

Martijn Berger was assigned by Bastien Montagne

2015-06-27 16:24:36 +02:00

Bastien Montagne commented

2015-06-27 16:24:36 +02:00

Added subscriber: @mont29

Julian Eisel commented

2015-06-28 22:24:36 +02:00

Added subscriber: @JulianEisel

Julian Eisel commented

2015-06-28 22:24:36 +02:00

@MartijnBerger, feel free to poke me if this needs some attention/tweaks in WM event system (although it should better be solved on GHOST level).

Brecht Van Lommel commented

2015-09-26 20:30:28 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2015-09-26 20:30:28 +02:00

The problem is the inertial scrolling where it keeps scrolling a while longer after you release the trackpad.

Perhaps the proper way to solve this would be to have a modal event handler that checks if the ctrl key is pressed when you start scrolling, and ignores any changes to the ctrl key as long as you're scrolling. The problem is that the way these events are implemented there is no start scrolling / stop scrolling event, it a separate event for every scrolling increment.

The problem is the inertial scrolling where it keeps scrolling a while longer after you release the trackpad. Perhaps the proper way to solve this would be to have a modal event handler that checks if the ctrl key is pressed when you start scrolling, and ignores any changes to the ctrl key as long as you're scrolling. The problem is that the way these events are implemented there is no start scrolling / stop scrolling event, it a separate event for every scrolling increment.

blender-admin commented

2015-10-10 14:00:02 +02:00

This issue was referenced by 240f356166

This issue was referenced by 240f356166e70dc495b44a4628d36181c93ff1a0

Brecht Van Lommel commented

2015-10-10 14:25:22 +02:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2015-10-10 14:25:22 +02:00

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Holding Ctrl right after trackpad scrolling makes unwanted zoom (OSX) #45167