| Summary: | Accessibility: drag lock implementation | ||
|---|---|---|---|
| Product: | xorg | Reporter: | Peter Hutterer <peter.hutterer> |
| Component: | Input/libinput | Assignee: | Peter Hutterer <peter.hutterer> |
| Status: | RESOLVED FIXED | QA Contact: | Xorg Project Team <xorg-team> |
| Severity: | normal | ||
| Priority: | medium | CC: | bugzilla, peter.hutterer, samuel.thibault |
| Version: | unspecified | ||
| Hardware: | Other | ||
| OS: | All | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
|
Description
Peter Hutterer
2014-10-28 23:11:44 UTC
evdev's implementation (which dates back to the mouse driver, which dates back to the mists of time) has two functionalities: 1) Button X locks button Y (usually X == Y) 2) Button B locks the next button pressed Googling shows a few public instances of X != Y, and a few instances of 2). http://www.slackwiki.com/Logitech_Marble_FX_mouse http://forum.ubuntuusers.de/topic/draglockbutton-mit-logitech-trackman-marble-f/ OS X doesn't seem to have that feature. Windows calls it ClickLock, and has an extra setting to regulate how long the button must be held before lock engages. http://www.dummies.com/how-to/content/how-to-use-clicklock-in-windows-7-for-better-mouse.html Should probably note that the few people I've asked all use it for button-based scroll lock. I have not yet talked to anyone using it for it's original intended purpose (a11y). First sighting of a user using it for actual drag lock: https://bugzilla.redhat.com/show_bug.cgi?id=1249309 Moving this to the xf86-input-libinput driver. Drag lock is something that should be implemented in the compositor (or in the X case the X input driver), not in libinput where it is hard to discover and cannot integrate with the UI. Implementing this in xf86-input-libinput still doesn't integrate well, but we don't really have a choice here in X. In the Wayland stack the compositor can handle drag lock properly and thus integrate it properly too. commit e3a888c3ab0f4cc42943b0216852cba110c3dad2 Author: Peter Hutterer <peter.hutterer@who-t.net> Date: Fri Aug 7 15:19:12 2015 +1000 Add drag lock support |
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