/* * Copyright © 2013 Jonas Ådahl * Copyright © 2013-2015 Red Hat, Inc. * * Permission to use, copy, modify, distribute, and sell this software and * its documentation for any purpose is hereby granted without fee, provided * that the above copyright notice appear in all copies and that both that * copyright notice and this permission notice appear in supporting * documentation, and that the name of the copyright holders not be used in * advertising or publicity pertaining to distribution of the software * without specific, written prior permission. The copyright holders make * no representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #ifndef LIBINPUT_H #define LIBINPUT_H #ifdef __cplusplus extern "C" { #endif #include #include #include #define LIBINPUT_ATTRIBUTE_PRINTF(_format, _args) \ __attribute__ ((format (printf, _format, _args))) #define LIBINPUT_ATTRIBUTE_DEPRECATED __attribute__ ((deprecated)) /** * Log priority for internal logging messages. */ enum libinput_log_priority { LIBINPUT_LOG_PRIORITY_DEBUG = 10, LIBINPUT_LOG_PRIORITY_INFO = 20, LIBINPUT_LOG_PRIORITY_ERROR = 30, }; /** * @ingroup device * * Capabilities on a device. A device may have one or more capabilities * at a time, capabilities remain static for the lifetime of the device. */ enum libinput_device_capability { LIBINPUT_DEVICE_CAP_KEYBOARD = 0, LIBINPUT_DEVICE_CAP_POINTER = 1, LIBINPUT_DEVICE_CAP_TOUCH = 2 }; /** * @ingroup device * * Logical state of a key. Note that the logical state may not represent * the physical state of the key. */ enum libinput_key_state { LIBINPUT_KEY_STATE_RELEASED = 0, LIBINPUT_KEY_STATE_PRESSED = 1 }; /** * @ingroup device * * Mask reflecting LEDs on a device. */ enum libinput_led { LIBINPUT_LED_NUM_LOCK = (1 << 0), LIBINPUT_LED_CAPS_LOCK = (1 << 1), LIBINPUT_LED_SCROLL_LOCK = (1 << 2) }; /** * @ingroup device * * Logical state of a physical button. Note that the logical state may not * represent the physical state of the button. */ enum libinput_button_state { LIBINPUT_BUTTON_STATE_RELEASED = 0, LIBINPUT_BUTTON_STATE_PRESSED = 1 }; /** * @ingroup device * * Axes on a device with the capability @ref LIBINPUT_DEVICE_CAP_POINTER * that are not x or y coordinates. * * The two scroll axes @ref LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL and * @ref LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL are engaged separately, * depending on the device. libinput provides some scroll direction locking * but it is up to the caller to determine which axis is needed and * appropriate in the current interaction */ enum libinput_pointer_axis { LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL = 0, LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL = 1, }; /** * @ingroup device * * The source for a libinput_pointer_axis event. See * libinput_event_pointer_get_axis_source() for details. */ enum libinput_pointer_axis_source { /** * The event is caused by the rotation of a wheel. */ LIBINPUT_POINTER_AXIS_SOURCE_WHEEL = 1, /** * The event is caused by the movement of one or more fingers on a * device. */ LIBINPUT_POINTER_AXIS_SOURCE_FINGER, /** * The event is caused by the motion of some device. */ LIBINPUT_POINTER_AXIS_SOURCE_CONTINUOUS, }; /** * @ingroup base * * Event type for events returned by libinput_get_event(). */ enum libinput_event_type { /** * This is not a real event type, and is only used to tell the user that * no new event is available in the queue. See * libinput_next_event_type(). */ LIBINPUT_EVENT_NONE = 0, /** * Signals that a device has been added to the context. The device will * not be read until the next time the user calls libinput_dispatch() * and data is available. * * This allows setting up initial device configuration before any events * are created. */ LIBINPUT_EVENT_DEVICE_ADDED, /** * Signals that a device has been removed. No more events from the * associated device will be in the queue or be queued after this event. */ LIBINPUT_EVENT_DEVICE_REMOVED, LIBINPUT_EVENT_KEYBOARD_KEY = 300, LIBINPUT_EVENT_POINTER_MOTION = 400, LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE, LIBINPUT_EVENT_POINTER_BUTTON, LIBINPUT_EVENT_POINTER_AXIS, LIBINPUT_EVENT_TOUCH_DOWN = 500, LIBINPUT_EVENT_TOUCH_UP, LIBINPUT_EVENT_TOUCH_MOTION, LIBINPUT_EVENT_TOUCH_CANCEL, /** * Signals the end of a set of touchpoints at one device sample * time. This event has no coordinate information attached. */ LIBINPUT_EVENT_TOUCH_FRAME }; /** * @ingroup base * @struct libinput * * A handle for accessing libinput. This struct is refcounted, use * libinput_ref() and libinput_unref(). */ struct libinput; /** * @ingroup device * @struct libinput_device * * A base handle for accessing libinput devices. This struct is * refcounted, use libinput_device_ref() and libinput_device_unref(). */ struct libinput_device; /** * @ingroup device * @struct libinput_device_group * * A base handle for accessing libinput device groups. This struct is * refcounted, use libinput_device_group_ref() and * libinput_device_group_unref(). */ struct libinput_device_group; /** * @ingroup seat * @struct libinput_seat * * The base handle for accessing libinput seats. This struct is * refcounted, use libinput_seat_ref() and libinput_seat_unref(). */ struct libinput_seat; /** * @ingroup event * @struct libinput_event * * The base event type. Use libinput_event_get_pointer_event() or similar to * get the actual event type. * * @warning Unlike other structs events are considered transient and * not refcounted. */ struct libinput_event; /** * @ingroup event * @struct libinput_event_device_notify * * An event notifying the caller of a device being added or removed. */ struct libinput_event_device_notify; /** * @ingroup event_keyboard * @struct libinput_event_keyboard * * A keyboard event representing a key press/release. */ struct libinput_event_keyboard; /** * @ingroup event_pointer * @struct libinput_event_pointer * * A pointer event representing relative or absolute pointer movement, * a button press/release or scroll axis events. */ struct libinput_event_pointer; /** * @ingroup event_touch * @struct libinput_event_touch * * Touch event representing a touch down, move or up, as well as a touch * cancel and touch frame events. Valid event types for this event are @ref * LIBINPUT_EVENT_TOUCH_DOWN, @ref LIBINPUT_EVENT_TOUCH_MOTION, @ref * LIBINPUT_EVENT_TOUCH_UP, @ref LIBINPUT_EVENT_TOUCH_CANCEL and @ref * LIBINPUT_EVENT_TOUCH_FRAME. */ struct libinput_event_touch; /** * @defgroup event Accessing and destruction of events */ /** * @ingroup event * * Destroy the event, freeing all associated resources. Resources obtained * from this event must be considered invalid after this call. * * @warning Unlike other structs events are considered transient and * not refcounted. Calling libinput_event_destroy() will * destroy the event. * * @param event An event retrieved by libinput_get_event(). */ void libinput_event_destroy(struct libinput_event *event); /** * @ingroup event * * Get the type of the event. * * @param event An event retrieved by libinput_get_event(). */ enum libinput_event_type libinput_event_get_type(struct libinput_event *event); /** * @ingroup event * * Get the libinput context from the event. * * @param event The libinput event * @return The libinput context for this event. */ struct libinput * libinput_event_get_context(struct libinput_event *event); /** * @ingroup event * * Return the device associated with this event. For device added/removed * events this is the device added or removed. For all other device events, * this is the device that generated the event. * * This device is not refcounted and its lifetime is that of the event. Use * libinput_device_ref() before using the device outside of this scope. * * @return The device associated with this event */ struct libinput_device * libinput_event_get_device(struct libinput_event *event); /** * @ingroup event * * Return the pointer event that is this input event. If the event type does * not match the pointer event types, this function returns NULL. * * The inverse of this function is libinput_event_pointer_get_base_event(). * * @return A pointer event, or NULL for other events */ struct libinput_event_pointer * libinput_event_get_pointer_event(struct libinput_event *event); /** * @ingroup event * * Return the keyboard event that is this input event. If the event type does * not match the keyboard event types, this function returns NULL. * * The inverse of this function is libinput_event_keyboard_get_base_event(). * * @return A keyboard event, or NULL for other events */ struct libinput_event_keyboard * libinput_event_get_keyboard_event(struct libinput_event *event); /** * @ingroup event * * Return the touch event that is this input event. If the event type does * not match the touch event types, this function returns NULL. * * The inverse of this function is libinput_event_touch_get_base_event(). * * @return A touch event, or NULL for other events */ struct libinput_event_touch * libinput_event_get_touch_event(struct libinput_event *event); /** * @ingroup event * * Return the device event that is this input event. If the event type does * not match the device event types, this function returns NULL. * * The inverse of this function is * libinput_event_device_notify_get_base_event(). * * @return A device event, or NULL for other events */ struct libinput_event_device_notify * libinput_event_get_device_notify_event(struct libinput_event *event); /** * @ingroup event * * @return The generic libinput_event of this event */ struct libinput_event * libinput_event_device_notify_get_base_event(struct libinput_event_device_notify *event); /** * @defgroup event_keyboard Keyboard events * * Key events are generated when a key changes its logical state, usually by * being pressed or released. */ /** * @ingroup event_keyboard * * @return The event time for this event */ uint32_t libinput_event_keyboard_get_time(struct libinput_event_keyboard *event); /** * @ingroup event_keyboard * * @return The keycode that triggered this key event */ uint32_t libinput_event_keyboard_get_key(struct libinput_event_keyboard *event); /** * @ingroup event_keyboard * * @return The state change of the key */ enum libinput_key_state libinput_event_keyboard_get_key_state(struct libinput_event_keyboard *event); /** * @ingroup event_keyboard * * @return The generic libinput_event of this event */ struct libinput_event * libinput_event_keyboard_get_base_event(struct libinput_event_keyboard *event); /** * @ingroup event_keyboard * * For the key of a @ref LIBINPUT_EVENT_KEYBOARD_KEY event, return the total number * of keys pressed on all devices on the associated seat after the event was * triggered. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_KEYBOARD_KEY. For other events, this function returns 0. * * @return The seat wide pressed key count for the key of this event */ uint32_t libinput_event_keyboard_get_seat_key_count( struct libinput_event_keyboard *event); /** * @defgroup event_pointer Pointer events * * Pointer events reflect motion, button and scroll events, as well as * events from other axes. */ /** * @ingroup event_pointer * * @return The event time for this event */ uint32_t libinput_event_pointer_get_time(struct libinput_event_pointer *event); /** * @ingroup event_pointer * * Return the delta between the last event and the current event. For pointer * events that are not of type @ref LIBINPUT_EVENT_POINTER_MOTION, this * function returns 0. * * If a device employs pointer acceleration, the delta returned by this * function is the accelerated delta. * * Relative motion deltas are normalized to represent those of a device with * 1000dpi resolution. See @ref motion_normalization for more details. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_MOTION. * * @return The relative x movement since the last event */ double libinput_event_pointer_get_dx(struct libinput_event_pointer *event); /** * @ingroup event_pointer * * Return the delta between the last event and the current event. For pointer * events that are not of type @ref LIBINPUT_EVENT_POINTER_MOTION, this * function returns 0. * * If a device employs pointer acceleration, the delta returned by this * function is the accelerated delta. * * Relative motion deltas are normalized to represent those of a device with * 1000dpi resolution. See @ref motion_normalization for more details. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_MOTION. * * @return The relative y movement since the last event */ double libinput_event_pointer_get_dy(struct libinput_event_pointer *event); /** * @ingroup event_pointer * * Return the relative delta of the unaccelerated motion vector of the * current event. For pointer events that are not of type @ref * LIBINPUT_EVENT_POINTER_MOTION, this function returns 0. * * Relative unaccelerated motion deltas are normalized to represent those of a * device with 1000dpi resolution. See @ref motion_normalization for more * details. Note that unaccelerated events are not equivalent to 'raw' events * as read from the device. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_MOTION. * * @return The unaccelerated relative x movement since the last event */ double libinput_event_pointer_get_dx_unaccelerated( struct libinput_event_pointer *event); /** * @ingroup event_pointer * * Return the relative delta of the unaccelerated motion vector of the * current event. For pointer events that are not of type @ref * LIBINPUT_EVENT_POINTER_MOTION, this function returns 0. * * Relative unaccelerated motion deltas are normalized to represent those of a * device with 1000dpi resolution. See @ref motion_normalization for more * details. Note that unaccelerated events are not equivalent to 'raw' events * as read from the device. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_MOTION. * * @return The unaccelerated relative y movement since the last event */ double libinput_event_pointer_get_dy_unaccelerated( struct libinput_event_pointer *event); /** * @ingroup event_pointer * * Return the current absolute x coordinate of the pointer event, in mm from * the top left corner of the device. To get the corresponding output screen * coordinate, use libinput_event_pointer_get_absolute_x_transformed(). * * For pointer events that are not of type * @ref LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE, this function returns 0. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE. * * @return The current absolute x coordinate */ double libinput_event_pointer_get_absolute_x(struct libinput_event_pointer *event); /** * @ingroup event_pointer * * Return the current absolute y coordinate of the pointer event, in mm from * the top left corner of the device. To get the corresponding output screen * coordinate, use libinput_event_pointer_get_absolute_y_transformed(). * * For pointer events that are not of type * @ref LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE, this function returns 0. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE. * * @return The current absolute y coordinate */ double libinput_event_pointer_get_absolute_y(struct libinput_event_pointer *event); /** * @ingroup event_pointer * * Return the current absolute x coordinate of the pointer event, transformed to * screen coordinates. * * For pointer events that are not of type * @ref LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE, the return value of this * function is undefined. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE. * * @param event The libinput pointer event * @param width The current output screen width * @return The current absolute x coordinate transformed to a screen coordinate */ double libinput_event_pointer_get_absolute_x_transformed( struct libinput_event_pointer *event, uint32_t width); /** * @ingroup event_pointer * * Return the current absolute y coordinate of the pointer event, transformed to * screen coordinates. * * For pointer events that are not of type * @ref LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE, the return value of this function is * undefined. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_MOTION_ABSOLUTE. * * @param event The libinput pointer event * @param height The current output screen height * @return The current absolute y coordinate transformed to a screen coordinate */ double libinput_event_pointer_get_absolute_y_transformed( struct libinput_event_pointer *event, uint32_t height); /** * @ingroup event_pointer * * Return the button that triggered this event. * For pointer events that are not of type @ref * LIBINPUT_EVENT_POINTER_BUTTON, this function returns 0. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_BUTTON. * * @return The button triggering this event */ uint32_t libinput_event_pointer_get_button(struct libinput_event_pointer *event); /** * @ingroup event_pointer * * Return the button state that triggered this event. * For pointer events that are not of type @ref * LIBINPUT_EVENT_POINTER_BUTTON, this function returns 0. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_BUTTON. * * @return The button state triggering this event */ enum libinput_button_state libinput_event_pointer_get_button_state(struct libinput_event_pointer *event); /** * @ingroup event_pointer * * For the button of a @ref LIBINPUT_EVENT_POINTER_BUTTON event, return the * total number of buttons pressed on all devices on the associated seat * after the event was triggered. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_BUTTON. For other events, this function * returns 0. * * @return The seat wide pressed button count for the key of this event */ uint32_t libinput_event_pointer_get_seat_button_count( struct libinput_event_pointer *event); /** * @ingroup event_pointer * * Check if the event has a valid value for the given axis. * * If this function returns non-zero for an axis and * libinput_event_pointer_get_axis_value() returns a value of 0, the event * is a scroll stop event. * * For pointer events that are not of type @ref LIBINPUT_EVENT_POINTER_AXIS, * this function returns 0. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_AXIS. * * @return Non-zero if this event contains a value for this axis */ int libinput_event_pointer_has_axis(struct libinput_event_pointer *event, enum libinput_pointer_axis axis); /** * @ingroup event_pointer * * Return the axis value of the given axis. The interpretation of the value * depends on the axis. For the two scrolling axes * @ref LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL and * @ref LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL, the value of the event is in * relative scroll units, with the positive direction being down or right, * respectively. For the interpretation of the value, see * libinput_event_pointer_get_axis_source(). * * If libinput_event_pointer_has_axis() returns 0 for an axis, this function * returns 0 for that axis. * * For pointer events that are not of type @ref LIBINPUT_EVENT_POINTER_AXIS, * this function returns 0. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_AXIS. * * @return The axis value of this event * * @see libinput_event_pointer_get_axis_value_discrete */ double libinput_event_pointer_get_axis_value(struct libinput_event_pointer *event, enum libinput_pointer_axis axis); /** * @ingroup event_pointer * * Return the source for a given axis event. Axis events (scroll events) can * be caused by a hardware item such as a scroll wheel or emulated from * other input sources, such as two-finger or edge scrolling on a * touchpad. * * If the source is @ref LIBINPUT_POINTER_AXIS_SOURCE_FINGER, libinput * guarantees that a scroll sequence is terminated with a scroll value of 0. * A caller may use this information to decide on whether kinetic scrolling * should be triggered on this scroll sequence. * The coordinate system is identical to the cursor movement, i.e. a * scroll value of 1 represents the equivalent relative motion of 1. * * If the source is @ref LIBINPUT_POINTER_AXIS_SOURCE_WHEEL, no terminating * event is guaranteed (though it may happen). * Scrolling is in discrete steps, the value is the angle the wheel moved * in degrees. The default is 15 degrees per wheel click, but some mice may * have differently grained wheels. It is up to the caller how to interpret * such different step sizes. * * If the source is @ref LIBINPUT_POINTER_AXIS_SOURCE_CONTINUOUS, no * terminating event is guaranteed (though it may happen). * The coordinate system is identical to the cursor movement, i.e. a * scroll value of 1 represents the equivalent relative motion of 1. * * For pointer events that are not of type @ref LIBINPUT_EVENT_POINTER_AXIS, * this function returns 0. * * @note It is an application bug to call this function for events other than * @ref LIBINPUT_EVENT_POINTER_AXIS. * * @return The source for this axis event */ enum libinput_pointer_axis_source libinput_event_pointer_get_axis_source(struct libinput_event_pointer *event); /** * @ingroup pointer * * Return the axis value in discrete steps for a given axis event. How a * value translates into a discrete step depends on the source. * * If the source is @ref LIBINPUT_POINTER_AXIS_SOURCE_WHEEL, the discrete * value correspond to the number of physical mouse wheel clicks. * * If the source is @ref LIBINPUT_POINTER_AXIS_SOURCE_CONTINUOUS or @ref * LIBINPUT_POINTER_AXIS_SOURCE_FINGER, the discrete value is always 0. * * @return The discrete value for the given event. * * @see libinput_event_pointer_get_axis_value */ double libinput_event_pointer_get_axis_value_discrete(struct libinput_event_pointer *event, enum libinput_pointer_axis axis); /** * @ingroup event_pointer * * @return The generic libinput_event of this event */ struct libinput_event * libinput_event_pointer_get_base_event(struct libinput_event_pointer *event); /** * @defgroup event_touch Touch events * * Events from absolute touch devices. */ /** * @ingroup event_touch * * @return The event time for this event */ uint32_t libinput_event_touch_get_time(struct libinput_event_touch *event); /** * @ingroup event_touch * * 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. * * For events not of type @ref LIBINPUT_EVENT_TOUCH_DOWN, @ref * LIBINPUT_EVENT_TOUCH_UP, @ref LIBINPUT_EVENT_TOUCH_MOTION or @ref * LIBINPUT_EVENT_TOUCH_CANCEL, this function returns 0. * * @note It is an application bug to call this function for events of type * other than @ref LIBINPUT_EVENT_TOUCH_DOWN, @ref LIBINPUT_EVENT_TOUCH_UP, * @ref LIBINPUT_EVENT_TOUCH_MOTION or @ref LIBINPUT_EVENT_TOUCH_CANCEL. * * @return The slot of this touch event */ int32_t libinput_event_touch_get_slot(struct libinput_event_touch *event); /** * @ingroup event_touch * * 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. * * For events not of type @ref LIBINPUT_EVENT_TOUCH_DOWN, @ref * LIBINPUT_EVENT_TOUCH_UP, @ref LIBINPUT_EVENT_TOUCH_MOTION or @ref * LIBINPUT_EVENT_TOUCH_CANCEL, this function returns 0. * * @note It is an application bug to call this function for events of type * other than @ref LIBINPUT_EVENT_TOUCH_DOWN, @ref LIBINPUT_EVENT_TOUCH_UP, * @ref LIBINPUT_EVENT_TOUCH_MOTION or @ref LIBINPUT_EVENT_TOUCH_CANCEL. * * @return The seat slot of the touch event */ int32_t libinput_event_touch_get_seat_slot(struct libinput_event_touch *event); /** * @ingroup event_touch * * 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(). * * For events not of type @ref LIBINPUT_EVENT_TOUCH_DOWN, @ref * LIBINPUT_EVENT_TOUCH_MOTION, this function returns 0. * * @note It is an application bug to call this function for events of type * @ref LIBINPUT_EVENT_TOUCH_DOWN or @ref LIBINPUT_EVENT_TOUCH_MOTION. * * @param event The libinput touch event * @return The current absolute x coordinate */ double libinput_event_touch_get_x(struct libinput_event_touch *event); /** * @ingroup event_touch * * 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 events not of type @ref LIBINPUT_EVENT_TOUCH_DOWN, @ref * LIBINPUT_EVENT_TOUCH_MOTION, this function returns 0. * * @note It is an application bug to call this function for events of type * @ref LIBINPUT_EVENT_TOUCH_DOWN or @ref LIBINPUT_EVENT_TOUCH_MOTION. * * @param event The libinput touch event * @return The current absolute y coordinate */ double libinput_event_touch_get_y(struct libinput_event_touch *event); /** * @ingroup event_touch * * Return the current absolute x coordinate of the touch event, transformed to * screen coordinates. * * For events not of type @ref LIBINPUT_EVENT_TOUCH_DOWN, @ref * LIBINPUT_EVENT_TOUCH_MOTION, this function returns 0. * * @note It is an application bug to call this function for events of type * @ref LIBINPUT_EVENT_TOUCH_DOWN or @ref LIBINPUT_EVENT_TOUCH_MOTION. * * @param event The libinput touch event * @param width The current output screen width * @return The current absolute x coordinate transformed to a screen coordinate */ double libinput_event_touch_get_x_transformed(struct libinput_event_touch *event, uint32_t width); /** * @ingroup event_touch * * Return the current absolute y coordinate of the touch event, transformed to * screen coordinates. * * For events not of type @ref LIBINPUT_EVENT_TOUCH_DOWN, @ref * LIBINPUT_EVENT_TOUCH_MOTION, this function returns 0. * * @note It is an application bug to call this function for events of type * @ref LIBINPUT_EVENT_TOUCH_DOWN or @ref LIBINPUT_EVENT_TOUCH_MOTION. * * @param event The libinput touch event * @param height The current output screen height * @return The current absolute y coordinate transformed to a screen coordinate */ double libinput_event_touch_get_y_transformed(struct libinput_event_touch *event, uint32_t height); /** * @ingroup event_touch * * @return The generic libinput_event of this event */ struct libinput_event * libinput_event_touch_get_base_event(struct libinput_event_touch *event); /** * @defgroup base Initialization and manipulation of libinput contexts */ /** * @ingroup base * @struct libinput_interface * * libinput does not open file descriptors to devices directly, instead * open_restricted() and close_restricted() are called for each path that * must be opened. * * @see libinput_udev_create_context * @see libinput_path_create_context */ struct libinput_interface { /** * Open the device at the given path with the flags provided and * return the fd. * * @param path The device path to open * @param flags Flags as defined by open(2) * @param user_data The user_data provided in * libinput_udev_create_context() * * @return The file descriptor, or a negative errno on failure. */ int (*open_restricted)(const char *path, int flags, void *user_data); /** * Close the file descriptor. * * @param fd The file descriptor to close * @param user_data The user_data provided in * libinput_udev_create_context() */ void (*close_restricted)(int fd, void *user_data); }; /** * @ingroup base * * Create a new libinput context from udev. This context is inactive until * assigned a seat ID with libinput_udev_assign_seat(). * * @param interface The callback interface * @param user_data Caller-specific data passed to the various callback * interfaces. * @param udev An already initialized udev context * * @return An initialized, but inactive libinput context or NULL on error */ struct libinput * libinput_udev_create_context(const struct libinput_interface *interface, void *user_data, struct udev *udev); /** * @ingroup base * * Assign a seat to this libinput context. New devices or the removal of * existing devices will appear as events during libinput_dispatch(). * * libinput_udev_assign_seat() succeeds even if no input devices are currently * available on this seat, or if devices are available but fail to open in * @ref libinput_interface::open_restricted. Devices that do not have the * minimum capabilities to be recognized as pointer, keyboard or touch * device are ignored. Such devices and those that failed to open * ignored until the next call to libinput_resume(). * * This function may only be called once per context. * * @param libinput A libinput context initialized with * libinput_udev_create_context() * @param seat_id A seat identifier. This string must not be NULL. * * @return 0 on success or -1 on failure. */ int libinput_udev_assign_seat(struct libinput *libinput, const char *seat_id); /** * @ingroup base * * Create a new libinput context that requires the caller to manually add or * remove devices with libinput_path_add_device() and * libinput_path_remove_device(). * * The context is fully initialized but will not generate events until at * least one device has been added. * * The reference count of the context is initialized to 1. See @ref * libinput_unref. * * @param interface The callback interface * @param user_data Caller-specific data passed to the various callback * interfaces. * * @return An initialized, empty libinput context. */ struct libinput * libinput_path_create_context(const struct libinput_interface *interface, void *user_data); /** * @ingroup base * * Add a device to a libinput context initialized with * libinput_path_create_context(). If successful, the device will be * added to the internal list and re-opened on libinput_resume(). The device * can be removed with libinput_path_remove_device(). * * If the device was successfully initialized, it is returned in the device * argument. The lifetime of the returned device pointer is limited until * the next libinput_dispatch(), use libinput_device_ref() to keep a permanent * reference. * * @param libinput A previously initialized libinput context * @param path Path to an input device * @return The newly initiated device on success, or NULL on failure. * * @note It is an application bug to call this function on a libinput * context initialized with libinput_udev_create_context(). */ struct libinput_device * libinput_path_add_device(struct libinput *libinput, const char *path); /** * @ingroup base * * Remove a device from a libinput context initialized with * libinput_path_create_context() or added to such a context with * libinput_path_add_device(). * * Events already processed from this input device are kept in the queue, * the @ref LIBINPUT_EVENT_DEVICE_REMOVED event marks the end of events for * this device. * * If no matching device exists, this function does nothing. * * @param device A libinput device * * @note It is an application bug to call this function on a libinput * context initialized with libinput_udev_create_context(). */ void libinput_path_remove_device(struct libinput_device *device); /** * @ingroup base * * libinput keeps a single file descriptor for all events. Call into * libinput_dispatch() if any events become available on this fd. * * @return The file descriptor used to notify of pending events. */ int libinput_get_fd(struct libinput *libinput); /** * @ingroup base * * Main event dispatchment function. Reads events of the file descriptors * and processes them internally. Use libinput_get_event() to retrieve the * events. * * Dispatching does not necessarily queue libinput events. This function * should be called immediately once data is available on the file * descriptor returned by libinput_get_fd(). libinput has a number of * timing-sensitive features (e.g. tap-to-click), any delay in calling * libinput_dispatch() may prevent these features from working correctly. * * @param libinput A previously initialized libinput context * * @return 0 on success, or a negative errno on failure */ int libinput_dispatch(struct libinput *libinput); /** * @ingroup base * * Retrieve the next event from libinput's internal event queue. * * After handling the retrieved event, the caller must destroy it using * libinput_event_destroy(). * * @param libinput A previously initialized libinput context * @return The next available event, or NULL if no event is available. */ struct libinput_event * libinput_get_event(struct libinput *libinput); /** * @ingroup base * * Return the type of the next event in the internal queue. This function * does not pop the event off the queue and the next call to * libinput_get_event() returns that event. * * @param libinput A previously initialized libinput context * @return The event type of the next available event or @ref * LIBINPUT_EVENT_NONE if no event is availble. */ enum libinput_event_type libinput_next_event_type(struct libinput *libinput); /** * @ingroup base * * Set caller-specific data associated with this context. libinput does * not manage, look at, or modify this data. The caller must ensure the * data is valid. * * @param libinput A previously initialized libinput context * @param user_data Caller-specific data passed to the various callback * interfaces. */ void libinput_set_user_data(struct libinput *libinput, void *user_data); /** * @ingroup base * * Get the caller-specific data associated with this context, if any. * * @param libinput A previously initialized libinput context * @return The caller-specific data previously assigned in * libinput_create_udev(). */ void * libinput_get_user_data(struct libinput *libinput); /** * @ingroup base * * Resume a suspended libinput context. This re-enables device * monitoring and adds existing devices. * * @param libinput A previously initialized libinput context * @see libinput_suspend * * @return 0 on success or -1 on failure */ int libinput_resume(struct libinput *libinput); /** * @ingroup base * * Suspend monitoring for new devices and close existing devices. * This all but terminates libinput but does keep the context * valid to be resumed with libinput_resume(). * * @param libinput A previously initialized libinput context */ void libinput_suspend(struct libinput *libinput); /** * @ingroup base * * Add a reference to the context. A context is destroyed whenever the * reference count reaches 0. See @ref libinput_unref. * * @param libinput A previously initialized valid libinput context * @return The passed libinput context */ struct libinput * libinput_ref(struct libinput *libinput); /** * @ingroup base * * Dereference the libinput context. After this, the context may have been * destroyed, if the last reference was dereferenced. If so, the context is * invalid and may not be interacted with. * * @param libinput A previously initialized libinput context * @return NULL if context was destroyed otherwise the passed context */ struct libinput * libinput_unref(struct libinput *libinput); /** * @ingroup base * * Set the log priority for the libinput context. Messages with priorities * equal to or higher than the argument will be printed to the context's * log handler. * * The default log priority is @ref LIBINPUT_LOG_PRIORITY_ERROR. * * @param libinput A previously initialized libinput context * @param priority The minimum priority of log messages to print. * * @see libinput_log_set_handler * @see libinput_log_get_priority */ void libinput_log_set_priority(struct libinput *libinput, enum libinput_log_priority priority); /** * @ingroup base * * Get the context's log priority. Messages with priorities equal to or * higher than the argument will be printed to the current log handler. * * The default log priority is @ref LIBINPUT_LOG_PRIORITY_ERROR. * * @param libinput A previously initialized libinput context * @return The minimum priority of log messages to print. * * @see libinput_log_set_handler * @see libinput_log_set_priority */ enum libinput_log_priority libinput_log_get_priority(const struct libinput *libinput); /** * @ingroup base * * Log handler type for custom logging. * * @param libinput The libinput context * @param priority The priority of the current message * @param format Message format in printf-style * @param args Message arguments * * @see libinput_log_set_priority * @see libinput_log_get_priority * @see libinput_log_set_handler */ typedef void (*libinput_log_handler)(struct libinput *libinput, enum libinput_log_priority priority, const char *format, va_list args) LIBINPUT_ATTRIBUTE_PRINTF(3, 0); /** * @ingroup base * * Set the context's log handler. Messages with priorities equal to or * higher than the context's log priority will be passed to the given * log handler. * * The default log handler prints to stderr. * * @param libinput A previously initialized libinput context * @param log_handler The log handler for library messages. * * @see libinput_log_set_priority * @see libinput_log_get_priority */ void libinput_log_set_handler(struct libinput *libinput, libinput_log_handler log_handler); /** * @defgroup seat Initialization and manipulation of seats * * A seat has two identifiers, the physical name and the logical name. A * device is always assigned to exactly one seat. It may change to a * different logical seat but it cannot change physical seats. See @ref * seats for details. */ /** * @ingroup seat * * Increase the refcount of the seat. A seat will be freed whenever the * refcount reaches 0. This may happen during libinput_dispatch() if the * seat was removed from the system. A caller must ensure to reference * the seat correctly to avoid dangling pointers. * * @param seat A previously obtained seat * @return The passed seat */ struct libinput_seat * libinput_seat_ref(struct libinput_seat *seat); /** * @ingroup seat * * Decrease the refcount of the seat. A seat will be freed whenever the * refcount reaches 0. This may happen during libinput_dispatch() if the * seat was removed from the system. A caller must ensure to reference * the seat correctly to avoid dangling pointers. * * @param seat A previously obtained seat * @return NULL if seat was destroyed, otherwise the passed seat */ struct libinput_seat * libinput_seat_unref(struct libinput_seat *seat); /** * @ingroup seat * * Set caller-specific data associated with this seat. libinput does * not manage, look at, or modify this data. The caller must ensure the * data is valid. * * @param seat A previously obtained seat * @param user_data Caller-specific data pointer * @see libinput_seat_get_user_data */ void libinput_seat_set_user_data(struct libinput_seat *seat, void *user_data); /** * @ingroup seat * * Get the caller-specific data associated with this seat, if any. * * @param seat A previously obtained seat * @return Caller-specific data pointer or NULL if none was set * @see libinput_seat_set_user_data */ void * libinput_seat_get_user_data(struct libinput_seat *seat); /** * @ingroup seat * * Get the libinput context from the seat. * * @param seat A previously obtained seat * @return The libinput context for this seat. */ struct libinput * libinput_seat_get_context(struct libinput_seat *seat); /** * @ingroup seat * * Return the physical name of the seat. For libinput contexts created from * udev, this is always the same value as passed into * libinput_udev_assign_seat() and all seats from that context will have * the same physical name. * * The physical name of the seat is one that is usually set by the system or * lower levels of the stack. In most cases, this is the base filter for * devices - devices assigned to seats outside the current seat will not * be available to the caller. * * @param seat A previously obtained seat * @return The physical name of this seat */ const char * libinput_seat_get_physical_name(struct libinput_seat *seat); /** * @ingroup seat * * Return the logical name of the seat. This is an identifier to group sets * of devices within the compositor. * * @param seat A previously obtained seat * @return The logical name of this seat */ const char * libinput_seat_get_logical_name(struct libinput_seat *seat); /** * @defgroup device Initialization and manipulation of input devices */ /** * @ingroup device * * Increase the refcount of the input device. An input device will be freed * whenever the refcount reaches 0. This may happen during * libinput_dispatch() if the device was removed from the system. A caller * must ensure to reference the device correctly to avoid dangling pointers. * * @param device A previously obtained device * @return The passed device */ struct libinput_device * libinput_device_ref(struct libinput_device *device); /** * @ingroup device * * Decrease the refcount of the input device. An input device will be freed * whenever the refcount reaches 0. This may happen during libinput_dispatch * if the device was removed from the system. A caller must ensure to * reference the device correctly to avoid dangling pointers. * * @param device A previously obtained device * @return NULL if the device was destroyed, otherwise the passed device */ struct libinput_device * libinput_device_unref(struct libinput_device *device); /** * @ingroup device * * Set caller-specific data associated with this input device. libinput does * not manage, look at, or modify this data. The caller must ensure the * data is valid. * * @param device A previously obtained device * @param user_data Caller-specific data pointer * @see libinput_device_get_user_data */ void libinput_device_set_user_data(struct libinput_device *device, void *user_data); /** * @ingroup device * * Get the caller-specific data associated with this input device, if any. * * @param device A previously obtained device * @return Caller-specific data pointer or NULL if none was set * @see libinput_device_set_user_data */ void * libinput_device_get_user_data(struct libinput_device *device); /** * @ingroup device * * Get the libinput context from the device. * * @param device A previously obtained device * @return The libinput context for this device. */ struct libinput * libinput_device_get_context(struct libinput_device *device); /** * @ingroup device * * Get the device group this device is assigned to. Some physical * devices like graphics tablets are represented by multiple kernel * devices and thus by multiple struct @ref libinput_device. * * libinput assigns these devices to the same @ref libinput_device_group * allowing the caller to identify such devices and adjust configuration * settings accordingly. For example, setting a tablet to left-handed often * means turning it upside down. A touch device on the same tablet would * need to be turned upside down too to work correctly. * * All devices are part of a device group though for most devices the group * will be a singleton. A device is assigned to a device group on @ref * LIBINPUT_EVENT_DEVICE_ADDED and removed from that group on @ref * LIBINPUT_EVENT_DEVICE_REMOVED. It is up to the caller to track how many * devices are in each device group. * * @dot * digraph groups_libinput { * rankdir="TB"; * node [ * shape="box"; * ] * * mouse [ label="mouse"; URL="\ref libinput_device"]; * kbd [ label="keyboard"; URL="\ref libinput_device"]; * * pen [ label="tablet pen"; URL="\ref libinput_device"]; * touch [ label="tablet touch"; URL="\ref libinput_device"]; * pad [ label="tablet pad"; URL="\ref libinput_device"]; * * group1 [ label="group 1"; URL="\ref libinput_device_group"]; * group2 [ label="group 2"; URL="\ref libinput_device_group"]; * group3 [ label="group 3"; URL="\ref libinput_device_group"]; * * mouse -> group1 * kbd -> group2 * * pen -> group3; * touch -> group3; * pad -> group3; * } * @enddot * * Device groups do not get re-used once the last device in the group was * removed, i.e. unplugging and re-plugging a physical device with grouped * devices will return a different device group after every unplug. * * The returned device group is not refcounted and may become invalid after * the next call to libinput. Use libinput_device_group_ref() and * libinput_device_group_unref() to continue using the handle outside of the * immediate scope. * * Device groups are assigned based on the LIBINPUT_DEVICE_GROUP udev * property, see @ref udev_config. * * @return The device group this device belongs to */ struct libinput_device_group * libinput_device_get_device_group(struct libinput_device *device); /** * @ingroup device * * Get the system name of the device. * * To get the descriptive device name, use libinput_device_get_name(). * * @param device A previously obtained device * @return System name of the device * */ const char * libinput_device_get_sysname(struct libinput_device *device); /** * @ingroup device * * The descriptive device name as advertised by the kernel and/or the * hardware itself. To get the sysname for this device, use * libinput_device_get_sysname(). * * The lifetime of the returned string is tied to the struct * libinput_device. The string may be the empty string but is never NULL. * * @param device A previously obtained device * @return The device name */ const char * libinput_device_get_name(struct libinput_device *device); /** * @ingroup device * * Get the product ID for this device. * * @param device A previously obtained device * @return The product ID of this device */ unsigned int libinput_device_get_id_product(struct libinput_device *device); /** * @ingroup device * * Get the vendor ID for this device. * * @param device A previously obtained device * @return The vendor ID of this device */ unsigned int libinput_device_get_id_vendor(struct libinput_device *device); /** * @ingroup device * * A device may be mapped to a single output, or all available outputs. If a * device is mapped to a single output only, a relative device may not move * beyond the boundaries of this output. An absolute device has its input * coordinates mapped to the extents of this output. * * @return The name of the output this device is mapped to, or NULL if no * output is set */ const char * libinput_device_get_output_name(struct libinput_device *device); /** * @ingroup device * * Get the seat associated with this input device, see @ref seats for * details. * * A seat can be uniquely identified by the physical and logical seat name. * There will ever be only one seat instance with a given physical and logical * seat name pair at any given time, but if no external reference is kept, it * may be destroyed if no device belonging to it is left. * * @param device A previously obtained device * @return The seat this input device belongs to */ struct libinput_seat * libinput_device_get_seat(struct libinput_device *device); /** * @ingroup device * * Change the logical seat associated with this device by removing the * device and adding it to the new seat. * * This command is identical to physically unplugging the device, then * re-plugging it as member of the new seat. libinput will generate a * @ref LIBINPUT_EVENT_DEVICE_REMOVED event and this @ref libinput_device is * considered removed from the context; it will not generate further events * and will be freed when the refcount reaches zero. * A @ref LIBINPUT_EVENT_DEVICE_ADDED event is generated with a new @ref * libinput_device handle. It is the caller's responsibility to update * references to the new device accordingly. * * If the logical seat name already exists in the device's physical seat, * the device is added to this seat. Otherwise, a new seat is created. * * @note This change applies to this device until removal or @ref * libinput_suspend(), whichever happens earlier. * * @param device A previously obtained device * @param name The new logical seat name * @return 0 on success, non-zero on error */ int libinput_device_set_seat_logical_name(struct libinput_device *device, const char *name); /** * @ingroup device * * Return a udev handle to the device that is this libinput device, if any. * The returned handle has a refcount of at least 1, the caller must call * udev_device_unref() once to release the associated resources. * See the [libudev documentation] * (http://www.freedesktop.org/software/systemd/libudev/) for details. * * Some devices may not have a udev device, or the udev device may be * unobtainable. This function returns NULL if no udev device was available. * * Calling this function multiple times for the same device may not * return the same udev handle each time. * * @param device A previously obtained device * @return A udev handle to the device with a refcount of >= 1 or NULL. * @retval NULL This device is not represented by a udev device */ struct udev_device * libinput_device_get_udev_device(struct libinput_device *device); /** * @ingroup device * * Update the LEDs on the device, if any. If the device does not have * LEDs, or does not have one or more of the LEDs given in the mask, this * function does nothing. * * @param device A previously obtained device * @param leds A mask of the LEDs to set, or unset. */ void libinput_device_led_update(struct libinput_device *device, enum libinput_led leds); /** * @ingroup device * * Check if the given device has the specified capability * * @return Non-zero if the given device has the capability or zero otherwise */ int libinput_device_has_capability(struct libinput_device *device, enum libinput_device_capability capability); /** * @ingroup device * * Get the physical size of a device in mm, where meaningful. This function * only succeeds on devices with the required data, i.e. tablets, touchpads * and touchscreens. * * If this function returns nonzero, width and height are unmodified. * * @param device The device * @param width Set to the width of the device * @param height Set to the height of the device * @return 0 on success, or nonzero otherwise */ int libinput_device_get_size(struct libinput_device *device, double *width, double *height); /** * @ingroup device * * Check if a @ref LIBINPUT_DEVICE_CAP_POINTER device has a button with the * given code (see linux/input.h). * * @param device A current input device * @param code Button code to check for, e.g. BTN_LEFT * * @return 1 if the device supports this button code, 0 if it does not, -1 * on error. */ int libinput_device_pointer_has_button(struct libinput_device *device, uint32_t code); /** * @ingroup device * * Check if a @ref LIBINPUT_DEVICE_CAP_KEYBOARD device has a key with the * given code (see linux/input.h). * * @param device A current input device * @param code Key code to check for, e.g. KEY_ESC * * @return 1 if the device supports this key code, 0 if it does not, -1 * on error. */ int libinput_device_keyboard_has_key(struct libinput_device *device, uint32_t code); /** * @ingroup device * * Increase the refcount of the device group. A device group will be freed * whenever the refcount reaches 0. This may happen during * libinput_dispatch() if all devices of this group were removed from the * system. A caller must ensure to reference the device group correctly to * avoid dangling pointers. * * @param group A previously obtained device group * @return The passed device group */ struct libinput_device_group * libinput_device_group_ref(struct libinput_device_group *group); /** * @ingroup device * * Decrease the refcount of the device group. A device group will be freed * whenever the refcount reaches 0. This may happen during * libinput_dispatch() if all devices of this group were removed from the * system. A caller must ensure to reference the device group correctly to * avoid dangling pointers. * * @param group A previously obtained device group * @return NULL if the device group was destroyed, otherwise the passed * device group */ struct libinput_device_group * libinput_device_group_unref(struct libinput_device_group *group); /** * @ingroup device * * Set caller-specific data associated with this device group. libinput does * not manage, look at, or modify this data. The caller must ensure the * data is valid. * * @param group A previously obtained device group * @param user_data Caller-specific data pointer * @see libinput_device_group_get_user_data */ void libinput_device_group_set_user_data(struct libinput_device_group *group, void *user_data); /** * @ingroup device * * Get the caller-specific data associated with this input device group, if * any. * * @param group A previously obtained group * @return Caller-specific data pointer or NULL if none was set * @see libinput_device_group_set_user_data */ void * libinput_device_group_get_user_data(struct libinput_device_group *group); /** * @defgroup config Device configuration * * Enable, disable, change and/or check for device-specific features. For * all features, libinput assigns a default based on the hardware * configuration. This default can be obtained with the respective * get_default call. * * Some configuration option may be dependent on or mutually exclusive with * with other options. The behavior in those cases is * implementation-dependent, the caller must ensure that the options are set * in the right order. */ /** * @ingroup config * * Status codes returned when applying configuration settings. */ enum libinput_config_status { LIBINPUT_CONFIG_STATUS_SUCCESS = 0, /**< Config applied successfully */ LIBINPUT_CONFIG_STATUS_UNSUPPORTED, /**< Configuration not available on this device */ LIBINPUT_CONFIG_STATUS_INVALID, /**< Invalid parameter range */ }; /** * @ingroup config * * Return a string describing the error. * * @param status The status to translate to a string * @return A human-readable string representing the error or NULL for an * invalid status. */ const char * libinput_config_status_to_str(enum libinput_config_status status); /** * @ingroup config */ enum libinput_config_tap_state { LIBINPUT_CONFIG_TAP_DISABLED, /**< Tapping is to be disabled, or is currently disabled */ LIBINPUT_CONFIG_TAP_ENABLED, /**< Tapping is to be enabled, or is currently enabled */ }; /** * @ingroup config * * Check if the device supports tap-to-click and how many fingers can be * used for tapping. See * libinput_device_config_tap_set_enabled() for more information. * * @param device The device to configure * @return The number of fingers that can generate a tap event, or 0 if the * device does not support tapping. * * @see libinput_device_config_tap_set_enabled * @see libinput_device_config_tap_get_enabled * @see libinput_device_config_tap_get_default_enabled */ int libinput_device_config_tap_get_finger_count(struct libinput_device *device); /** * @ingroup config * * Enable or disable tap-to-click on this device, with a default mapping of * 1, 2, 3 finger tap mapping to left, right, middle click, respectively. * Tapping is limited by the number of simultaneous touches * supported by the device, see * libinput_device_config_tap_get_finger_count(). * * @param device The device to configure * @param enable @ref LIBINPUT_CONFIG_TAP_ENABLED to enable tapping or @ref * LIBINPUT_CONFIG_TAP_DISABLED to disable tapping * * @return A config status code. Disabling tapping on a device that does not * support tapping always succeeds. * * @see libinput_device_config_tap_get_finger_count * @see libinput_device_config_tap_get_enabled * @see libinput_device_config_tap_get_default_enabled */ enum libinput_config_status libinput_device_config_tap_set_enabled(struct libinput_device *device, enum libinput_config_tap_state enable); /** * @ingroup config * * Check if tap-to-click is enabled on this device. If the device does not * support tapping, this function always returns 0. * * @param device The device to configure * * @retval LIBINPUT_CONFIG_TAP_ENABLED If tapping is currently enabled * @retval LIBINPUT_CONFIG_TAP_DISABLED If tapping is currently disabled * * @see libinput_device_config_tap_get_finger_count * @see libinput_device_config_tap_set_enabled * @see libinput_device_config_tap_get_default_enabled */ enum libinput_config_tap_state libinput_device_config_tap_get_enabled(struct libinput_device *device); /** * @ingroup config * * Return the default setting for whether tap-to-click is enabled on this * device. * * @param device The device to configure * @retval LIBINPUT_CONFIG_TAP_ENABLED If tapping is enabled by default * @retval LIBINPUT_CONFIG_TAP_DISABLED If tapping Is disabled by default * * @see libinput_device_config_tap_get_finger_count * @see libinput_device_config_tap_set_enabled * @see libinput_device_config_tap_get_enabled */ enum libinput_config_tap_state libinput_device_config_tap_get_default_enabled(struct libinput_device *device); /** * @ingroup config * * Check if the device can be calibrated via a calibration matrix. * * @param device The device to check * @return Non-zero if the device can be calibrated, zero otherwise. * * @see libinput_device_config_calibration_set_matrix * @see libinput_device_config_calibration_get_matrix * @see libinput_device_config_calibration_get_default_matrix */ int libinput_device_config_calibration_has_matrix(struct libinput_device *device); /** * @ingroup config * * Apply the 3x3 transformation matrix to absolute device coordinates. This * matrix has no effect on relative events. * * Given a 6-element array [a, b, c, d, e, f], the matrix is applied as * @code * [ a b c ] [ x ] * [ d e f ] * [ y ] * [ 0 0 1 ] [ 1 ] * @endcode * * The translation component (c, f) is expected to be normalized to the * device coordinate range. For example, the matrix * @code * [ 1 0 1 ] * [ 0 1 -1 ] * [ 0 0 1 ] * @endcode * moves all coordinates by 1 device-width to the right and 1 device-height * up. * * The rotation matrix for rotation around the origin is defined as * @code * [ cos(a) -sin(a) 0 ] * [ sin(a) cos(a) 0 ] * [ 0 0 1 ] * @endcode * Note that any rotation requires an additional translation component to * translate the rotated coordinates back into the original device space. * The rotation matrixes for 90, 180 and 270 degrees clockwise are: * @code * 90 deg cw: 180 deg cw: 270 deg cw: * [ 0 -1 1] [ -1 0 1] [ 0 1 0 ] * [ 1 0 0] [ 0 -1 1] [ -1 0 1 ] * [ 0 0 1] [ 0 0 1] [ 0 0 1 ] * @endcode * * @param device The device to configure * @param matrix An array representing the first two rows of a 3x3 matrix as * described above. * * @return A config status code. * * @see libinput_device_config_calibration_has_matrix * @see libinput_device_config_calibration_get_matrix * @see libinput_device_config_calibration_get_default_matrix */ enum libinput_config_status libinput_device_config_calibration_set_matrix(struct libinput_device *device, const float matrix[6]); /** * @ingroup config * * Return the current calibration matrix for this device. * * @param device The device to configure * @param matrix Set to the array representing the first two rows of a 3x3 matrix as * described in libinput_device_config_calibration_set_matrix(). * * @return 0 if no calibration is set and the returned matrix is the * identity matrix, 1 otherwise * * @see libinput_device_config_calibration_has_matrix * @see libinput_device_config_calibration_set_matrix * @see libinput_device_config_calibration_get_default_matrix */ int libinput_device_config_calibration_get_matrix(struct libinput_device *device, float matrix[6]); /** * @ingroup config * * Return the default calibration matrix for this device. On most devices, * this is the identity matrix. If the udev property * LIBINPUT_CALIBRATION_MATRIX is set on the respective udev device, * that property's value becomes the default matrix, see @ref udev_config. * * @param device The device to configure * @param matrix Set to the array representing the first two rows of a 3x3 matrix as * described in libinput_device_config_calibration_set_matrix(). * * @return 0 if no calibration is set and the returned matrix is the * identity matrix, 1 otherwise * * @see libinput_device_config_calibration_has_matrix * @see libinput_device_config_calibration_set_matrix * @see libinput_device_config_calibration_get_default_matrix */ int libinput_device_config_calibration_get_default_matrix(struct libinput_device *device, float matrix[6]); /** * The send-event mode of a device defines when a device may generate events * and pass those events to the caller. */ enum libinput_config_send_events_mode { /** * Send events from this device normally. This is a placeholder * mode only, any device detected by libinput can be enabled. Do not * test for this value as bitmask. */ LIBINPUT_CONFIG_SEND_EVENTS_ENABLED = 0, /** * Do not send events through this device. Depending on the device, * this may close all file descriptors on the device or it may leave * the file descriptors open and route events through a different * device. * * If this bit field is set, other disable modes may be * ignored. For example, if both @ref * LIBINPUT_CONFIG_SEND_EVENTS_DISABLED and @ref * LIBINPUT_CONFIG_SEND_EVENTS_DISABLED_ON_EXTERNAL_MOUSE are set, * the device remains disabled when all external pointer devices are * unplugged. */ LIBINPUT_CONFIG_SEND_EVENTS_DISABLED = (1 << 0), /** * If an external pointer device is plugged in, do not send events * from this device. This option may be available on built-in * touchpads. */ LIBINPUT_CONFIG_SEND_EVENTS_DISABLED_ON_EXTERNAL_MOUSE = (1 << 1), }; /** * @ingroup config * * Return the possible send-event modes for this device. These modes define * when a device may process and send events. * * @param device The device to configure * * @return A bitmask of possible modes. * * @see libinput_device_config_send_events_set_mode * @see libinput_device_config_send_events_get_mode * @see libinput_device_config_send_events_get_default_mode */ uint32_t libinput_device_config_send_events_get_modes(struct libinput_device *device); /** * @ingroup config * * Set the send-event mode for this device. The mode defines when the device * processes and sends events to the caller. * * The selected mode may not take effect immediately. Events already * received and processed from this device are unaffected and will be passed * to the caller on the next call to libinput_get_event(). * * If the mode is a bitmask of @ref libinput_config_send_events_mode, * the device may wait for or generate events until it is in a neutral * state. For example, this may include waiting for or generating button * release events. * * If the device is already suspended, this function does nothing and * returns success. Changing the send-event mode on a device that has been * removed is permitted. * * @param device The device to configure * @param mode A bitmask of send-events modes * * @return A config status code. * * @see libinput_device_config_send_events_get_modes * @see libinput_device_config_send_events_get_mode * @see libinput_device_config_send_events_get_default_mode */ enum libinput_config_status libinput_device_config_send_events_set_mode(struct libinput_device *device, uint32_t mode); /** * @ingroup config * * Get the send-event mode for this device. The mode defines when the device * processes and sends events to the caller. * * If a caller enables the bits for multiple modes, some of which are * subsets of another mode libinput may drop the bits that are subsets. In * other words, don't expect libinput_device_config_send_events_get_mode() * to always return exactly the same bitmask as passed into * libinput_device_config_send_events_set_mode(). * * @param device The device to configure * @return The current bitmask of the send-event mode for this device. * * @see libinput_device_config_send_events_get_modes * @see libinput_device_config_send_events_set_mode * @see libinput_device_config_send_events_get_default_mode */ uint32_t libinput_device_config_send_events_get_mode(struct libinput_device *device); /** * @ingroup config * * Get the default send-event mode for this device. The mode defines when * the device processes and sends events to the caller. * * @param device The device to configure * @return The bitmask of the send-event mode for this device. * * @see libinput_device_config_send_events_get_modes * @see libinput_device_config_send_events_set_mode * @see libinput_device_config_send_events_get_mode */ uint32_t libinput_device_config_send_events_get_default_mode(struct libinput_device *device); /** * @ingroup config * * Check if a device uses libinput-internal pointer-acceleration. * * @param device The device to configure * * @return 0 if the device is not accelerated, nonzero if it is accelerated */ int libinput_device_config_accel_is_available(struct libinput_device *device); /** * @ingroup config * * Set the pointer acceleration speed of this pointer device within a range * of [-1, 1], where 0 is the default acceleration for this device, -1 is * the slowest acceleration and 1 is the maximum acceleration available on * this device. The actual pointer acceleration mechanism is * implementation-dependent, as is the number of steps available within the * range. libinput picks the semantically closest acceleration step if the * requested value does not match a discrete setting. * * @param device The device to configure * @param speed The normalized speed, in a range of [-1, 1] * * @return A config status code */ enum libinput_config_status libinput_device_config_accel_set_speed(struct libinput_device *device, double speed); /** * @ingroup config * * Get the current pointer acceleration setting for this pointer device. The * returned value is normalized to a range of [-1, 1]. * See libinput_device_config_accel_set_speed() for details. * * @param device The device to configure * * @return The current speed, range -1 to 1 */ double libinput_device_config_accel_get_speed(struct libinput_device *device); /** * @ingroup config * * Return the default speed setting for this device, normalized to a range * of [-1, 1]. * See libinput_device_config_accel_set_speed() for details. * * @param device The device to configure * @return The default speed setting for this device. */ double libinput_device_config_accel_get_default_speed(struct libinput_device *device); /** * @ingroup config * * Return non-zero if the device supports "natural scrolling". * * In traditional scroll mode, the movement of fingers on a touchpad when * scrolling matches the movement of the scroll bars. When the fingers move * down, the scroll bar moves down, a line of text on the screen moves * towards the upper end of the screen. This also matches scroll wheels on * mice (wheel down, content moves up). * * Natural scrolling is the term coined by Apple for inverted scrolling. * In this mode, the effect of scrolling movement of fingers on a touchpad * resemble physical manipulation of paper. When the fingers move down, a * line of text on the screen moves down (scrollbars move up). This is the * opposite of scroll wheels on mice. * * A device supporting natural scrolling can be switched between traditional * scroll mode and natural scroll mode. * * @param device The device to configure * * @return Zero if natural scrolling is not supported, non-zero if natural * scrolling is supported by this device * * @see libinput_device_config_set_natural_scroll_enabled * @see libinput_device_config_get_natural_scroll_enabled * @see libinput_device_config_get_default_natural_scroll_enabled */ int libinput_device_config_scroll_has_natural_scroll(struct libinput_device *device); /** * @ingroup config * * Enable or disable natural scrolling on the device. * * @param device The device to configure * @param enable non-zero to enable, zero to disable natural scrolling * * @return A config status code * * @see libinput_device_config_has_natural_scroll * @see libinput_device_config_get_natural_scroll_enabled * @see libinput_device_config_get_default_natural_scroll_enabled */ enum libinput_config_status libinput_device_config_scroll_set_natural_scroll_enabled(struct libinput_device *device, int enable); /** * @ingroup config * * Get the current mode for scrolling on this device * * @param device The device to configure * * @return Zero if natural scrolling is disabled, non-zero if enabled * * @see libinput_device_config_has_natural_scroll * @see libinput_device_config_set_natural_scroll_enabled * @see libinput_device_config_get_default_natural_scroll_enabled */ int libinput_device_config_scroll_get_natural_scroll_enabled(struct libinput_device *device); /** * @ingroup config * * Get the default mode for scrolling on this device * * @param device The device to configure * * @return Zero if natural scrolling is disabled by default, non-zero if enabled * * @see libinput_device_config_has_natural_scroll * @see libinput_device_config_set_natural_scroll_enabled * @see libinput_device_config_get_natural_scroll_enabled */ int libinput_device_config_scroll_get_default_natural_scroll_enabled(struct libinput_device *device); /** * @ingroup config * * Check if a device has a configuration that supports left-handed usage. * * @param device The device to configure * @return Non-zero if the device can be set to left-handed, or zero * otherwise * * @see libinput_device_config_left_handed_set * @see libinput_device_config_left_handed_get * @see libinput_device_config_left_handed_get_default */ int libinput_device_config_left_handed_is_available(struct libinput_device *device); /** * @ingroup config * * Set the left-handed configuration of the device. * * The exact behavior is device-dependent. On a mouse and most pointing * devices, left and right buttons are swapped but the middle button is * unmodified. On a touchpad, physical buttons (if present) are swapped. On a * clickpad, the top and bottom software-emulated buttons are swapped where * present, the main area of the touchpad remains a left button. Tapping and * clickfinger behavior is not affected by this setting. * * Changing the left-handed configuration of a device may not take effect * until all buttons have been logically released. * * @param device The device to configure * @param left_handed Zero to disable, non-zero to enable left-handed mode * @return A configuration status code * * @see libinput_device_config_left_handed_is_available * @see libinput_device_config_left_handed_get * @see libinput_device_config_left_handed_get_default */ enum libinput_config_status libinput_device_config_left_handed_set(struct libinput_device *device, int left_handed); /** * @ingroup config * * Get the current left-handed configuration of the device. * * @param device The device to configure * @return Zero if the device is in right-handed mode, non-zero if the * device is in left-handed mode * * @see libinput_device_config_left_handed_is_available * @see libinput_device_config_left_handed_set * @see libinput_device_config_left_handed_get_default */ int libinput_device_config_left_handed_get(struct libinput_device *device); /** * @ingroup config * * Get the default left-handed configuration of the device. * * @param device The device to configure * @return Zero if the device is in right-handed mode by default, or non-zero * if the device is in left-handed mode by default * * @see libinput_device_config_left_handed_is_available * @see libinput_device_config_left_handed_set * @see libinput_device_config_left_handed_get */ int libinput_device_config_left_handed_get_default(struct libinput_device *device); /** * @ingroup config * * The click method defines when to generate software-emulated * buttons, usually on a device that does not have a specific physical * button available. */ enum libinput_config_click_method { /** * Do not send software-emulated button events. This has no effect * on events generated by physical buttons. */ LIBINPUT_CONFIG_CLICK_METHOD_NONE = 0, /** * Use software-button areas (see @ref clickfinger) to generate * button events. */ LIBINPUT_CONFIG_CLICK_METHOD_BUTTON_AREAS = (1 << 0), /** * The number of fingers decides which button press to generate. */ LIBINPUT_CONFIG_CLICK_METHOD_CLICKFINGER = (1 << 1), }; /** * @ingroup config * * Check which button click methods a device supports. The button click * method defines when to generate software-emulated buttons, usually on a * device that does not have a specific physical button available. * * @param device The device to configure * * @return A bitmask of possible methods. * * @see libinput_device_config_click_get_methods * @see libinput_device_config_click_set_method * @see libinput_device_config_click_get_method */ uint32_t libinput_device_config_click_get_methods(struct libinput_device *device); /** * @ingroup config * * Set the button click method for this device. The button click * method defines when to generate software-emulated buttons, usually on a * device that does not have a specific physical button available. * * @note The selected click method may not take effect immediately. The * device may require changing to a neutral state first before activating * the new method. * * @param device The device to configure * @param method The button click method * * @return A config status code * * @see libinput_device_config_click_get_methods * @see libinput_device_config_click_get_method * @see libinput_device_config_click_get_default_method */ enum libinput_config_status libinput_device_config_click_set_method(struct libinput_device *device, enum libinput_config_click_method method); /** * @ingroup config * * Get the button click method for this device. The button click * method defines when to generate software-emulated buttons, usually on a * device that does not have a specific physical button available. * * @param device The device to configure * * @return The current button click method for this device * * @see libinput_device_config_click_get_methods * @see libinput_device_config_click_set_method * @see libinput_device_config_click_get_default_method */ enum libinput_config_click_method libinput_device_config_click_get_method(struct libinput_device *device); /** * @ingroup config * * Get the default button click method for this device. The button click * method defines when to generate software-emulated buttons, usually on a * device that does not have a specific physical button available. * * @param device The device to configure * * @return The default button click method for this device * * @see libinput_device_config_click_get_methods * @see libinput_device_config_click_set_method * @see libinput_device_config_click_get_method */ enum libinput_config_click_method libinput_device_config_click_get_default_method(struct libinput_device *device); /** * @ingroup config */ enum libinput_config_middle_emulation_state { /** * Middle mouse button emulation is to be disabled, or * is currently disabled. */ LIBINPUT_CONFIG_MIDDLE_EMULATION_DISABLED, /** * Middle mouse button emulation is to be enabled, or * is currently enabled. */ LIBINPUT_CONFIG_MIDDLE_EMULATION_ENABLED, }; /** * @ingroup config * * Check if middle mouse button emulation configuration is available on this * device. See libinput_device_config_middle_emulation_set_enabled() for * details. * * @note Some devices provide middle mouse button emulation but do not allow * enabling/disabling that emulation. These devices return zero in * libinput_device_config_middle_emulation_is_available(). * * @param device The device to query * * @return Non-zero if middle mouse button emulation is available and can be * configured, zero otherwise. * * @see libinput_device_config_middle_emulation_set_enabled * @see libinput_device_config_middle_emulation_get_enabled * @see libinput_device_config_middle_emulation_get_default_enabled */ int libinput_device_config_middle_emulation_is_available( struct libinput_device *device); /** * @ingroup config * * Enable or disable middle button emulation on this device. When enabled, a * simultaneous press of the left and right button generates a middle mouse * button event. Releasing the buttons generates a middle mouse button * release, the left and right button events are discarded otherwise. * * The middle button release event may be generated when either button is * released, or when both buttons have been released. The exact behavior is * device-dependent. * * The middle button emulation behavior when combined with other device * buttons, including a physical middle button is device-dependent. * * @note Some devices provide middle mouse button emulation but do not allow * enabling/disabling that emulation. * * @param device The device to configure * @param enable @ref LIBINPUT_CONFIG_MIDDLE_EMULATION_DISABLED to * disable, @ref LIBINPUT_CONFIG_MIDDLE_EMULATION_ENABLED To enable * middle button emulation. * * @return A config status code. Disabling middle button emulation on a * device that does not support middle button emulation always succeeds. * * @see libinput_device_config_middle_emulation_is_available * @see libinput_device_config_middle_emulation_get_enabled * @see libinput_device_config_middle_emulation_get_default_enabled */ enum libinput_config_status libinput_device_config_middle_emulation_set_enabled( struct libinput_device *device, enum libinput_config_middle_emulation_state enable); /** * @ingroup config * * Check if configurable middle button emulation is enabled on this device. * If the device does not have configurable middle button emulation, this * function returns @ref LIBINPUT_CONFIG_MIDDLE_EMULATION_DISABLED. * * @note Some devices provide middle mouse button emulation but do not allow * enabling/disabling that emulation. These devices always return @ref * LIBINPUT_CONFIG_MIDDLE_EMULATION_DISABLED. * * @param device The device to configure * @return @ref LIBINPUT_CONFIG_MIDDLE_EMULATION_DISABLED if disabled * or not available/configurable, @ref * LIBINPUT_CONFIG_MIDDLE_EMULATION_ENABLED If enabled. * * @see libinput_device_config_middle_emulation_is_available * @see libinput_device_config_middle_emulation_set_enabled * @see libinput_device_config_middle_emulation_get_default_enabled */ enum libinput_config_middle_emulation_state libinput_device_config_middle_emulation_get_enabled( struct libinput_device *device); /** * @ingroup config * * Check if configurable middle button emulation is enabled by default on * this device. If the device does not have configurable middle button * emulation, this function returns @ref * LIBINPUT_CONFIG_MIDDLE_EMULATION_DISABLED. * * @note Some devices provide middle mouse button emulation but do not allow * enabling/disabling that emulation. These devices always return @ref * LIBINPUT_CONFIG_MIDDLE_EMULATION_DISABLED. * * @param device The device to configure * @return @ref LIBINPUT_CONFIG_MIDDLE_EMULATION_DISABLED If disabled * or not available, @ref LIBINPUT_CONFIG_MIDDLE_EMULATION_ENABLED if * enabled. * * @see libinput_device_config_middle_emulation_is_available * @see libinput_device_config_middle_emulation_set_enabled * @see libinput_device_config_middle_emulation_get_enabled */ enum libinput_config_middle_emulation_state libinput_device_config_middle_emulation_get_default_enabled( struct libinput_device *device); /** * @ingroup config * * The scroll method of a device selects when to generate scroll axis events * instead of pointer motion events. */ enum libinput_config_scroll_method { /** * Never send scroll events instead of pointer motion events. * This has no effect on events generated by scroll wheels. */ LIBINPUT_CONFIG_SCROLL_NO_SCROLL = 0, /** * Send scroll events when two fingers are logically down on the * device. */ LIBINPUT_CONFIG_SCROLL_2FG = (1 << 0), /** * Send scroll events when a finger moves along the bottom or * right edge of a device. */ LIBINPUT_CONFIG_SCROLL_EDGE = (1 << 1), /** * Send scroll events when a button is down and the device moves * along a scroll-capable axis. */ LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN = (1 << 2), }; /** * @ingroup config * * Check which scroll methods a device supports. The method defines when to * generate scroll axis events instead of pointer motion events. * * @param device The device to configure * * @return A bitmask of possible methods. * * @see libinput_device_config_scroll_set_method * @see libinput_device_config_scroll_get_method * @see libinput_device_config_scroll_get_default_method * @see libinput_device_config_scroll_set_button * @see libinput_device_config_scroll_get_button * @see libinput_device_config_scroll_get_default_button */ uint32_t libinput_device_config_scroll_get_methods(struct libinput_device *device); /** * @ingroup config * * Set the scroll method for this device. The method defines when to * generate scroll axis events instead of pointer motion events. * * @note Setting @ref LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN enables * the scroll method, but scrolling is only activated when the configured * button is held down. If no button is set, i.e. * libinput_device_config_scroll_get_button() returns 0, scrolling * cannot activate. * * @param device The device to configure * @param method The scroll method for this device. * * @return A config status code. * * @see libinput_device_config_scroll_get_methods * @see libinput_device_config_scroll_get_method * @see libinput_device_config_scroll_get_default_method * @see libinput_device_config_scroll_set_button * @see libinput_device_config_scroll_get_button * @see libinput_device_config_scroll_get_default_button */ enum libinput_config_status libinput_device_config_scroll_set_method(struct libinput_device *device, enum libinput_config_scroll_method method); /** * @ingroup config * * Get the scroll method for this device. The method defines when to * generate scroll axis events instead of pointer motion events. * * @param device The device to configure * @return The current scroll method for this device. * * @see libinput_device_config_scroll_get_methods * @see libinput_device_config_scroll_set_method * @see libinput_device_config_scroll_get_default_method * @see libinput_device_config_scroll_set_button * @see libinput_device_config_scroll_get_button * @see libinput_device_config_scroll_get_default_button */ enum libinput_config_scroll_method libinput_device_config_scroll_get_method(struct libinput_device *device); /** * @ingroup config * * Get the default scroll method for this device. The method defines when to * generate scroll axis events instead of pointer motion events. * * @param device The device to configure * @return The default scroll method for this device. * * @see libinput_device_config_scroll_get_methods * @see libinput_device_config_scroll_set_method * @see libinput_device_config_scroll_get_method * @see libinput_device_config_scroll_set_button * @see libinput_device_config_scroll_get_button * @see libinput_device_config_scroll_get_default_button */ enum libinput_config_scroll_method libinput_device_config_scroll_get_default_method(struct libinput_device *device); /** * @ingroup config * * Set the button for the @ref LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN method * for this device. * * When the current scroll method is set to @ref * LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN, no button press/release events * will be send for the configured button. * * When the configured button is pressed, any motion events along a * scroll-capable axis are turned into scroll axis events. * * @note Setting the button does not change the scroll method. To change the * scroll method call libinput_device_config_scroll_set_method(). * * If the button is 0, button scrolling is effectively disabled. * * @param device The device to configure * @param button The button which when pressed switches to sending scroll events * * @return A config status code * @retval LIBINPUT_CONFIG_STATUS_SUCCESS On success * @retval LIBINPUT_CONFIG_STATUS_UNSUPPORTED If @ref * LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN is not supported * @retval LIBINPUT_CONFIG_STATUS_INVALID The given button does not * exist on this device * * @see libinput_device_config_scroll_get_methods * @see libinput_device_config_scroll_set_method * @see libinput_device_config_scroll_get_method * @see libinput_device_config_scroll_get_default_method * @see libinput_device_config_scroll_get_button * @see libinput_device_config_scroll_get_default_button */ enum libinput_config_status libinput_device_config_scroll_set_button(struct libinput_device *device, uint32_t button); /** * @ingroup config * * Get the button for the @ref LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN method * for this device. * * If @ref LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN scroll method is not * supported, or no button is set, this function returns 0. * * @note The return value is independent of the currently selected * scroll-method. For button scrolling to activate, a device must have the * @ref LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN method enabled, and a non-zero * button set as scroll button. * * @param device The device to configure * @return The button which when pressed switches to sending scroll events * * @see libinput_device_config_scroll_get_methods * @see libinput_device_config_scroll_set_method * @see libinput_device_config_scroll_get_method * @see libinput_device_config_scroll_get_default_method * @see libinput_device_config_scroll_set_button * @see libinput_device_config_scroll_get_default_button */ uint32_t libinput_device_config_scroll_get_button(struct libinput_device *device); /** * @ingroup config * * Get the default button for the @ref LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN * method for this device. * * If @ref LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN scroll method is not supported, * or no default button is set, this function returns 0. * * @param device The device to configure * @return The default button for the @ref * LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN method * * @see libinput_device_config_scroll_get_methods * @see libinput_device_config_scroll_set_method * @see libinput_device_config_scroll_get_method * @see libinput_device_config_scroll_get_default_method * @see libinput_device_config_scroll_set_button * @see libinput_device_config_scroll_get_button */ uint32_t libinput_device_config_scroll_get_default_button(struct libinput_device *device); #ifdef __cplusplus } #endif #endif /* LIBINPUT_H */