Ticket #3994 - zoom unstable

[Kunda1]

issue #3994

Description
cambia visuale in automatico, sparisce tutto dopo qualche secondo, perde il centro schermo

English:
changes view automatically, disappears after a few seconds, loses the screen center

Steps To Reproduce

aprire file esempio
fare scorrere il mouse sullo schermo
si nota la scomparsa dell'immagine, e la rotazione parziale del Gestore visuale 3d in alto a dx

English:
open example files
slide the mouse on the screen
note the disappearance of the image, and the partial rotation of the visual 3D manager at the top right

Additional Information
OS: Windows 7
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.16110 (Git)
Build type: Release
Branch: (HEAD detached at upstream/releases/FreeCAD-0-18)
Hash: f7dccfaa909e5b9da26bf50c4a22ccca9bb10c40
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Italian/Italy (it_IT)

[bejant]

issue #3994

open example files

I don't see any files in the ticket...

[chrisb]

I remember some 0.19 versions showing such behaviour with gesture mouse model. So the following questions may be of interest

- Can this be reproduced in current 0.19?
- Is it a special mouse model which shows this behaviour?
- And a minor question: Why is this in Open discussion and not in Help forum?

[pablogil]

Gesture model has been always very “unstable” with a mac trackpad but I always thought it was a sensibility thing... it would be handy to have an option in Preferences to tweak this sensibility or steps.

[chrisb]

There is an option for the zooming which works quite well.