From c5e59d9d910e611687957736cdc58593c1f56439 Mon Sep 17 00:00:00 2001 From: Peter Hutterer Date: Mon, 16 Dec 2013 09:43:40 +1000 Subject: On clickpads with two touchpoints, try to detect clickfinger 3 actions Some touchpads provide BTN_TOOL_TRIPLETAP but do not track more than two touchpoints. For those, try to detect clickfinger3 actions as best as we can. Signed-off-by: Peter Hutterer (cherry picked from commit 51b6bf3c1083638527b18696c2b682fd78c97070) --- src/synaptics.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'src') diff --git a/src/synaptics.c b/src/synaptics.c index 0986e20..0539066 100644 --- a/src/synaptics.c +++ b/src/synaptics.c @@ -2584,6 +2584,28 @@ clickpad_guess_clickfingers(SynapticsPrivate * priv, close_point >>= 1; } + /* Some trackpads touchpad only track two touchpoints but announce + BTN_TOOL_TRIPLETAP (which sets hw->numFingers to 3). + This can affect clickfingers, in the following ways: + * one finger down: normal click + * two fingers down, close together: 2 finger click + * two fingers down, apart: normal click + * three fingers down, close together: 3 finger click + * three fingers down, with two grouped next to each other: should be + * 2-finger click but we can't detect this. + * so: if two detected fingers are close together and HW says three + * fingers, make it three fingers. + * if two detected fingers are apart and HW says three fingers, make + * it a two-finger click, guessing that the third finger is somewhere + * close to another finger. + */ + if (hw->numFingers >= 3 && nfingers < hw->numFingers) { + if (!nfingers) /* touchpoints too far apart */ + nfingers = 2; + else + nfingers++; + } + return nfingers; } -- cgit v1.2.3