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Diffstat (limited to 'doc/clickpad-softbuttons.dox')
| -rw-r--r-- | doc/clickpad-softbuttons.dox | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/doc/clickpad-softbuttons.dox b/doc/clickpad-softbuttons.dox index e7c4e543..a4f2e444 100644 --- a/doc/clickpad-softbuttons.dox +++ b/doc/clickpad-softbuttons.dox @@ -64,9 +64,16 @@ software-defined button areas. @image html clickfinger.svg "One, two and three-finger click with Clickfinger behavior" -The Xorg synaptics driver uses 30% of the touchpad dimensions as threshold, -libinput does not have this restriction. If two fingers are on the pad -while clicking, that is a two-finger click. +On some touchpads, libinput imposes a limit on how the fingers may be placed +on the touchpad. In the most common use-case this allows for a user to +trigger a click with the thumb while leaving the pointer-moving finger on +the touchpad. + +@image html clickfinger-distance.svg "Illustration of the distance detection algorithm" + +In the illustration above the red area marks the proximity area around the +first finger. Since the thumb is outside of that area libinput considers the +click a single-finger click rather than a two-finger click. Clickfinger configuration can be enabled through the libinput_device_config_click_set_method() call. If clickfingers are |