libinput
0.4.0
A wrapper library for input devices
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Events from absolute touch devices. More...
Data Structures | |
struct | libinput_event_touch |
Touch event representing a touch down, move or up, as well as a touch cancel and touch frame events. More... | |
Functions | |
uint32_t | libinput_event_touch_get_time (struct libinput_event_touch *event) |
int32_t | libinput_event_touch_get_slot (struct libinput_event_touch *event) |
Get the slot of this touch event. More... | |
int32_t | libinput_event_touch_get_seat_slot (struct libinput_event_touch *event) |
Get the seat slot of the touch event. More... | |
double | libinput_event_touch_get_x (struct libinput_event_touch *event) |
Return the current absolute x coordinate of the touch event, in mm from the top left corner of the device. More... | |
double | libinput_event_touch_get_y (struct libinput_event_touch *event) |
Return the current absolute y coordinate of the touch event, in mm from the top left corner of the device. More... | |
double | libinput_event_touch_get_x_transformed (struct libinput_event_touch *event, uint32_t width) |
Return the current absolute x coordinate of the touch event, transformed to screen coordinates. More... | |
double | libinput_event_touch_get_y_transformed (struct libinput_event_touch *event, uint32_t height) |
Return the current absolute y coordinate of the touch event, transformed to screen coordinates. More... | |
struct libinput_event * | libinput_event_touch_get_base_event (struct libinput_event_touch *event) |
Events from absolute touch devices.
struct libinput_event* libinput_event_touch_get_base_event | ( | struct libinput_event_touch * | event | ) |
int32_t libinput_event_touch_get_seat_slot | ( | struct libinput_event_touch * | event | ) |
Get the seat slot of the touch event.
A seat slot is a non-negative seat wide unique identifier of an active touch point.
Events from single touch devices will be represented as one individual touch point per device.
int32_t libinput_event_touch_get_slot | ( | struct libinput_event_touch * | event | ) |
Get the slot of this touch event.
See the kernel's multitouch protocol B documentation for more information.
If the touch event has no assigned slot, for example if it is from a single touch device, this function returns -1.
uint32_t libinput_event_touch_get_time | ( | struct libinput_event_touch * | event | ) |
double libinput_event_touch_get_x | ( | struct libinput_event_touch * | event | ) |
Return the current absolute x coordinate of the touch event, in mm from the top left corner of the device.
To get the corresponding output screen coordinate, use libinput_event_touch_get_x_transformed().
event | The libinput touch event |
double libinput_event_touch_get_x_transformed | ( | struct libinput_event_touch * | event, |
uint32_t | width | ||
) |
Return the current absolute x coordinate of the touch event, transformed to screen coordinates.
event | The libinput touch event |
width | The current output screen width |
double libinput_event_touch_get_y | ( | struct libinput_event_touch * | event | ) |
Return the current absolute y coordinate of the touch event, in mm from the top left corner of the device.
To get the corresponding output screen coordinate, use libinput_event_touch_get_y_transformed().
For LIBINPUT_EVENT_TOUCH_UP 0 is returned.
event | The libinput touch event |
double libinput_event_touch_get_y_transformed | ( | struct libinput_event_touch * | event, |
uint32_t | height | ||
) |
Return the current absolute y coordinate of the touch event, transformed to screen coordinates.
event | The libinput touch event |
height | The current output screen height |