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This enables two-finger scrolling and two- and three-finger tapping on a single-touch touchpad if BTN_TOOL_DOUBLETAP and BTN_TOOL_TRIPLETAP is set. These require a bit of special processing: BTN_TOUCH is set with the first finger down, but somewhat randomly unset and re-set when switching between the various BTN_TOOL_*TAP values. BTN_TOOL_<N>TAP is only set for N fingers down, thus a double->triple move will see a release for DOUBLETAP and a press for TRIPLETAP. This may happen in the same event, or across two consecutive events. This patch adds a fake_touches mask to the touchpad struct. The mask is set for each matching BTN_* event and used to count the number of expected fake touchpoints. From that we begin/end the number of actual touchpoints required. Fake touchpoints take their x/y coordinates from the first touchpoint, which reads ABS_X/ABS_Y. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> |
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libinput libinput is a library that handles input devices for display servers and other applications that need to directly deal with input devices. It provides device detection, device handling, input device event processing and abstraction so minimize the amount of custom input code the user of libinput need to provide the common set of functionality that users expect. Input event processing includes scaling touch coordinates, generating pointer events from touchpads, pointer acceleration, etc. libinput originates from weston, the Wayland reference compositor. The source code of libinput can be found at: http://cgit.freedesktop.org/wayland/libinput For more information, visit: http://www.freedesktop.org/wiki/Software/libinput/