[PATCH wayland-protocols v5 4/4] tablet: Add pad support to the tablet protocol
Carlos Garnacho
carlosg at gnome.org
Mon Jul 11 15:13:36 UTC 2016
The pad's interface is similar to the tool interface, a client is notified of
the pad after the tablet_added event.
The pad has three functionalities: buttons, rings and strips.
Buttons are fairly straightforward, rings and strips are separate interfaces
with a pointer-axis-like source/value/frame events.
The two interfaces are effectively identical but for the actual value they
send (degrees vs normalized position).
Buttons are sequentially indexed starting with zero, unlike other protocols
where a linux/input.h-style semantic event code is used. Since we expect all
buttons to have client-specific functionality, an additional event tells the
client when a given button index is not available, usually because the
compositor assignes some function to it (e.g. mode switching, see below).
Specific to the pad device is the set_feedback request which enables a client
to set a user-defined string to display for an OSD on the current mappings.
This request is available for buttons, rings and strips.
Finally, the pad supports groups, effectively sets of button/ring/strip
configurations. Those groups may have multiple modes each, so that
users/clients may map several actions to a single element.
Signed-off-by: Carlos Garnacho <carlosg at gnome.org>
Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
Reviewed-by: Jason Gerecke <jason.gerecke at wacom.com>
---
unstable/tablet/tablet-unstable-v2.xml | 540 +++++++++++++++++++++++++++++++++
1 file changed, 540 insertions(+)
diff --git a/unstable/tablet/tablet-unstable-v2.xml b/unstable/tablet/tablet-unstable-v2.xml
index 77b185c..2cc3a92 100644
--- a/unstable/tablet/tablet-unstable-v2.xml
+++ b/unstable/tablet/tablet-unstable-v2.xml
@@ -172,6 +172,22 @@
</description>
<arg name="id" type="new_id" interface="zwp_tablet_tool_v2" summary="the newly added tablet tool"/>
</event>
+
+ <event name="pad_added">
+ <description summary="new pad notification">
+ This event is sent whenever a new pad is known to the system. Typically,
+ pads are physically attached to tablets and a pad_added event is
+ sent immediately after the wp_tablet_seat.tablet_added.
+ However, some standalone pad devices logically attach to tablets at
+ runtime, and the client must wait for wp_tablet_pad.enter to know
+ the tablet a pad is attached to.
+
+ This event only provides the object id of the pad. All further
+ features (buttons, strips, rings) are sent through the wp_tablet_pad
+ interface.
+ </description>
+ <arg name="id" type="new_id" interface="zwp_tablet_pad_v2" summary="the newly added pad"/>
+ </event>
</interface>
<interface name="zwp_tablet_tool_v2" version="1">
@@ -636,4 +652,528 @@
</event>
</interface>
+ <interface name="zwp_tablet_pad_ring_v2" version="1">
+ <description summary="pad ring">
+ A circular interaction area, such as the touch ring on the Wacom Intuos
+ Pro series tablets.
+
+ Events on a ring are logically grouped by the wl_tablet_pad_ring.frame
+ event.
+ </description>
+
+ <request name="set_feedback">
+ <description summary="set compositor feedback">
+ Request that the compositor use the provided feedback string
+ associated with this ring. This request should be issued immediately
+ after a wp_tablet_pad_group.mode_switch event from the corresponding
+ group is received, or whenever the ring is mapped to a different
+ action. See wp_tablet_pad_group.mode_switch for more details.
+
+ Clients are encouraged to provide context-aware descriptions for
+ the actions associated with the ring; compositors may use this
+ information to offer visual feedback about the button layout
+ (eg. on-screen displays).
+
+ The provided string 'description' is a UTF-8 encoded string to be
+ associated with this ring, and is considered user-visible; general
+ internationalization rules apply.
+
+ The serial argument will be that of the last
+ wp_tablet_pad_group.mode_switch event received for the group of this
+ ring. Requests providing other serials than the most recent one will be
+ ignored.
+ </description>
+ <arg name="description" type="string" summary="ring description"/>
+ <arg name="serial" type="uint" summary="serial of the mode switch event"/>
+ </request>
+
+ <request name="destroy" type="destructor">
+ <description summary="destroy the ring object">
+ This destroys the client's resource for this ring object.
+ </description>
+ </request>
+
+ <enum name="source">
+ <description summary="ring axis source">
+ Describes the source types for ring events. This indicates to the
+ client how a ring event was physically generated; a client may
+ adjust the user interface accordingly. For example, events
+ from a "finger" source may trigger kinetic scrolling.
+ </description>
+ <entry name="finger" value="1" summary="finger"/>
+ </enum>
+
+ <event name="source">
+ <description summary="ring event source">
+ Source information for ring events.
+
+ This event does not occur on its own. It is sent before a
+ wp_tablet_pad_ring.frame event and carries the source information
+ for all events within that frame.
+
+ The source specifies how this event was generated. If the source is
+ wp_tablet_pad_ring.source.finger, a wp_tablet_pad_ring.stop event
+ will be sent when the user lifts the finger off the device.
+
+ This event is optional. If the source is unknown for an interaction,
+ no event is sent.
+ </description>
+ <arg name="source" type="uint" enum="source" summary="the event source"/>
+ </event>
+
+ <event name="angle">
+ <description summary="angle changed">
+ Sent whenever the angle on a ring changes.
+
+ The angle is provided in degrees clockwise from the logical
+ north of the ring in the pad's current rotation.
+ </description>
+ <arg name="degrees" type="fixed" summary="the current angle in degrees"/>
+ </event>
+
+ <event name="stop">
+ <description summary="interaction stopped">
+ Stop notification for ring events.
+
+ For some wp_tablet_pad_ring.source types, a wp_tablet_pad_ring.stop
+ event is sent to notify a client that the interaction with the ring
+ has terminated. This enables the client to implement kinetic scrolling.
+ See the wp_tablet_pad_ring.source documentation for information on
+ when this event may be generated.
+
+ Any wp_tablet_pad_ring.angle events with the same source after this
+ event should be considered as the start of a new interaction.
+ </description>
+ </event>
+
+ <event name="frame">
+ <description summary="end of a ring event sequence">
+ Indicates the end of a set of ring events that logically belong
+ together. A client is expected to accumulate the data in all events
+ within the frame before proceeding.
+
+ All wp_tablet_pad_ring events before a wp_tablet_pad_ring.frame event belong
+ logically together. For example, on termination of a finger interaction
+ on a ring the compositor will send a wp_tablet_pad_ring.source event,
+ a wp_tablet_pad_ring.stop event and a wp_tablet_pad_ring.frame event.
+
+ A wp_tablet_pad_ring.frame event is sent for every logical event
+ group, even if the group only contains a single wp_tablet_pad_ring
+ event. Specifically, a client may get a sequence: angle, frame,
+ angle, frame, etc.
+ </description>
+ <arg name="time" type="uint" summary="timestamp with millisecond granularity"/>
+ </event>
+ </interface>
+
+ <interface name="zwp_tablet_pad_strip_v2" version="1">
+ <description summary="pad strip">
+ A linear interaction area, such as the strips found in Wacom Cintiq
+ models.
+
+ Events on a strip are logically grouped by the wl_tablet_pad_strip.frame
+ event.
+ </description>
+
+ <request name="set_feedback">
+ <description summary="set compositor feedback">
+ Requests the compositor to use the provided feedback string
+ associated with this strip. This request should be issued immediately
+ after a wp_tablet_pad_group.mode_switch event from the corresponding
+ group is received, or whenever the strip is mapped to a different
+ action. See wp_tablet_pad_group.mode_switch for more details.
+
+ Clients are encouraged to provide context-aware descriptions for
+ the actions associated with the strip, and compositors may use this
+ information to offer visual feedback about the button layout
+ (eg. on-screen displays).
+
+ The provided string 'description' is a UTF-8 encoded string to be
+ associated with this ring, and is considered user-visible; general
+ internationalization rules apply.
+
+ The serial argument will be that of the last
+ wp_tablet_pad_group.mode_switch event received for the group of this
+ strip. Requests providing other serials than the most recent one will be
+ ignored.
+ </description>
+ <arg name="description" type="string" summary="strip description"/>
+ <arg name="serial" type="uint" summary="serial of the mode switch event"/>
+ </request>
+
+ <request name="destroy" type="destructor">
+ <description summary="destroy the strip object">
+ This destroys the client's resource for this strip object.
+ </description>
+ </request>
+
+ <enum name="source">
+ <description summary="strip axis source">
+ Describes the source types for strip events. This indicates to the
+ client how a strip event was physically generated; a client may
+ adjust the user interface accordingly. For example, events
+ from a "finger" source may trigger kinetic scrolling.
+ </description>
+ <entry name="finger" value="1" summary="finger"/>
+ </enum>
+
+ <event name="source">
+ <description summary="strip event source">
+ Source information for strip events.
+
+ This event does not occur on its own. It is sent before a
+ wp_tablet_pad_strip.frame event and carries the source information
+ for all events within that frame.
+
+ The source specifies how this event was generated. If the source is
+ wp_tablet_pad_strip.source.finger, a wp_tablet_pad_strip.stop event
+ will be sent when the user lifts their finger off the device.
+
+ This event is optional. If the source is unknown for an interaction,
+ no event is sent.
+ </description>
+ <arg name="source" type="uint" enum="source" summary="the event source"/>
+ </event>
+
+ <event name="position">
+ <description summary="position changed">
+ Sent whenever the position on a strip changes.
+
+ The position is normalized to a range of [0, 65535], the 0-value
+ represents the top-most and/or left-most position of the strip in
+ the pad's current rotation.
+ </description>
+ <arg name="position" type="uint" summary="the current position"/>
+ </event>
+
+ <event name="stop">
+ <description summary="interaction stopped">
+ Stop notification for strip events.
+
+ For some wp_tablet_pad_strip.source types, a wp_tablet_pad_strip.stop
+ event is sent to notify a client that the interaction with the strip
+ has terminated. This enables the client to implement kinetic
+ scrolling. See the wp_tablet_pad_strip.source documentation for
+ information on when this event may be generated.
+
+ Any wp_tablet_pad_strip.position events with the same source after this
+ event should be considered as the start of a new interaction.
+ </description>
+ </event>
+
+ <event name="frame">
+ <description summary="end of a strip event sequence">
+ Indicates the end of a set of events that represent one logical
+ hardware strip event. A client is expected to accumulate the data
+ in all events within the frame before proceeding.
+
+ All wp_tablet_pad_strip events before a wp_tablet_pad_strip.frame event belong
+ logically together. For example, on termination of a finger interaction
+ on a strip the compositor will send a wp_tablet_pad_strip.source event,
+ a wp_tablet_pad_strip.stop event and a wp_tablet_pad_strip.frame
+ event.
+
+ A wp_tablet_pad_strip.frame event is sent for every logical event
+ group, even if the group only contains a single wp_tablet_pad_strip
+ event. Specifically, a client may get a sequence: position, frame,
+ position, frame, etc.
+ </description>
+ <arg name="time" type="uint" summary="timestamp with millisecond granularity"/>
+ </event>
+ </interface>
+
+ <interface name="zwp_tablet_pad_group_v2" version="1">
+ <description summary="a set of buttons, rings and strips">
+ A pad group describes a distinct (sub)set of buttons, rings and strips
+ present in the tablet. The criteria of this grouping is usually positional,
+ eg. if a tablet has buttons on the left and right side, 2 groups will be
+ presented. The physical arrangement of groups is undisclosed and may
+ change on the fly.
+
+ Pad groups will announce their features during pad initialization. Between
+ the corresponding wp_tablet_pad.group event and wp_tablet_pad_group.done, the
+ pad group will announce the buttons, rings and strips comprised in it,
+ plus the number of supported modes.
+
+ Modes are a mechanism to allow multiple groups of actions for every element
+ in the pad group. The number of groups and available modes in each is
+ persistent across device plugs. The current mode is user-switchable, it
+ will be announced through the wp_tablet_pad_group.mode_switch event both
+ whenever it is switched, and after wp_tablet_pad.enter.
+
+ The current mode logically applies to all elements in the pad group,
+ although it is at clients' discretion whether to actually perform different
+ actions, and/or issue the respective .set_feedback requests to notify the
+ compositor. See the wp_tablet_pad_group.mode_switch event for more details.
+ </description>
+
+ <request name="destroy" type="destructor">
+ <description summary="destroy the pad object">
+ Destroy the wp_tablet_pad_group object. Objects created from this object
+ are unaffected and should be destroyed separately.
+ </description>
+ </request>
+
+ <event name="buttons">
+ <description summary="buttons announced">
+ Sent on wp_tablet_pad_group initialization to announce the available
+ buttons in the group. Button indices start at 0, a button may only be
+ in one group at a time.
+
+ This event is first sent in the initial burst of events before the
+ wp_tablet_pad_group.done event.
+
+ Some buttons are reserved by the compositor. These buttons may not be
+ assigned to any wp_tablet_pad_group. Compositors may broadcast this
+ event in the case of changes to the mapping of these reserved buttons.
+ If the compositor happens to reserve all buttons in a group, this event
+ will be sent with an empty array.
+ </description>
+ <arg name="buttons" type="array" summary="buttons in this group"/>
+ </event>
+
+ <event name="ring">
+ <description summary="ring announced">
+ Sent on wp_tablet_pad_group initialization to announce available rings.
+ One event is sent for each ring available on this pad group.
+
+ This event is sent in the initial burst of events before the
+ wp_tablet_pad_group.done event.
+ </description>
+ <arg name="ring" type="new_id" interface="zwp_tablet_pad_ring_v2"/>
+ </event>
+
+ <event name="strip">
+ <description summary="strip announced">
+ Sent on wp_tablet_pad initialization to announce available strips.
+ One event is sent for each strip available on this pad group.
+
+ This event is sent in the initial burst of events before the
+ wp_tablet_pad_group.done event.
+ </description>
+ <arg name="strip" type="new_id" interface="zwp_tablet_pad_strip_v2"/>
+ </event>
+
+ <event name="modes">
+ <description summary="mode-switch ability announced">
+ Sent on wp_tablet_pad_group initialization to announce that the pad
+ group may switch between modes. A client may use a mode to store a
+ specific configuration for buttons, rings and strips and use the
+ wl_tablet_pad_group.mode_switch event to toggle between these
+ configurations. Mode indices start at 0.
+
+ Switching modes is compositor-dependent. See the
+ wp_tablet_pad_group.mode_switch event for more details.
+
+ This event is sent in the initial burst of events before the
+ wp_tablet_pad_group.done event. This event is only sent when more than
+ more than one mode is available.
+ </description>
+ <arg name="modes" type="uint" summary="the number of modes"/>
+ </event>
+
+ <event name="done">
+ <description summary="tablet group description events sequence complete">
+ This event is sent immediately to signal the end of the initial
+ burst of descriptive events. A client may consider the static
+ description of the tablet to be complete and finalize initialization
+ of the tablet group.
+ </description>
+ </event>
+
+ <event name="mode_switch">
+ <description summary="mode switch event">
+ Notification that the mode was switched.
+
+ A mode applies to all buttons, rings and strips in a group
+ simultaneously, but a client is not required to assign different actions
+ for each mode. For example, a client may have mode-specific button
+ mappings but map the ring to vertical scrolling in all modes. Mode
+ indices start at 0.
+
+ Switching modes is compositor-dependent. The compositor may provide
+ visual cues to the client about the mode, e.g. by toggling LEDs on
+ the tablet device. Mode-switching may be software-controlled or
+ controlled by one or more physical buttons. For example, on a Wacom
+ Intuos Pro, the button inside the ring may be assigned to switch
+ between modes.
+
+ The compositor will also send this event after wp_tablet_pad.enter on
+ each group in order to notify of the current mode. Groups that only
+ feature one mode will use mode=0 when emitting this event.
+
+ If a button action in the new mode differs from the action in the
+ previous mode, the client should immediately issue a
+ wp_tablet_pad.set_feedback request for each changed button.
+
+ If a ring or strip action in the new mode differs from the action
+ in the previous mode, the client should immediately issue a
+ wp_tablet_ring.set_feedback or wp_tablet_strip.set_feedback request
+ for each changed ring or strip.
+ </description>
+ <arg name="time" type="uint" summary="the time of the event with millisecond granularity"/>
+ <arg name="serial" type="uint"/>
+ <arg name="mode" type="uint" summary="the new mode of the pad"/>
+ </event>
+ </interface>
+
+ <interface name="zwp_tablet_pad_v2" version="1">
+ <description summary="a set of buttons, rings and strips">
+ A pad device is a set of buttons, rings and strips
+ usually physically present on the tablet device itself. Some
+ exceptions exist where the pad device is physically detached, e.g. the
+ Wacom ExpressKey Remote.
+
+ Pad devices have no axes that control the cursor and are generally
+ auxiliary devices to the tool devices used on the tablet surface.
+
+ A pad device has a number of static characteristics, e.g. the number
+ of rings. These capabilities are sent in an event sequence after the
+ wp_tablet_seat.pad_added event before any actual events from this pad.
+ This initial event sequence is terminated by a wp_tablet_pad.done
+ event.
+
+ All pad features (buttons, rings and strips) are logically divided into
+ groups and all pads have at least one group. The available groups are
+ notified through the wp_tablet_pad.group event; the compositor will
+ emit one event per group before emitting wp_tablet_pad.done.
+
+ Groups may have multiple modes. Modes allow clients to map multiple
+ actions to a single pad feature. Only one mode can be active per group,
+ although different groups may have different active modes.
+ </description>
+
+ <request name="set_feedback">
+ <description summary="set compositor feedback">
+ Requests the compositor to use the provided feedback string
+ associated with this button. This request should be issued immediately
+ after a wp_tablet_pad_group.mode_switch event from the corresponding
+ group is received, or whenever a button is mapped to a different
+ action. See wp_tablet_pad_group.mode_switch for more details.
+
+ Clients are encouraged to provide context-aware descriptions for
+ the actions associated with each button, and compositors may use
+ this information to offer visual feedback on the button layout
+ (e.g. on-screen displays).
+
+ Button indices start at 0. Setting the feedback string on a button
+ that is reserved by the compositor (i.e. not belonging to any
+ wp_tablet_pad_group) does not generate an error but the compositor
+ is free to ignore the request.
+
+ The provided string 'description' is a UTF-8 encoded string to be
+ associated with this ring, and is considered user-visible; general
+ internationalization rules apply.
+
+ The serial argument will be that of the last
+ wp_tablet_pad_group.mode_switch event received for the group of this
+ button. Requests providing other serials than the most recent one will
+ be ignored.
+ </description>
+ <arg name="button" type="uint" summary="button index"/>
+ <arg name="description" type="string" summary="button description"/>
+ <arg name="serial" type="uint" summary="serial of the mode switch event"/>
+ </request>
+
+ <request name="destroy" type="destructor">
+ <description summary="destroy the pad object">
+ Destroy the wp_tablet_pad object. Objects created from this object
+ are unaffected and should be destroyed separately.
+ </description>
+ </request>
+
+ <event name="group">
+ <description summary="group announced">
+ Sent on wp_tablet_pad initialization to announce available groups.
+ One event is sent for each pad group available.
+
+ This event is sent in the initial burst of events before the
+ wp_tablet_pad.done event. At least one group will be announced.
+ </description>
+ <arg name="pad_group" type="new_id" interface="zwp_tablet_pad_group_v2"/>
+ </event>
+
+ <event name="path">
+ <description summary="path to the device">
+ A system-specific device path that indicates which device is behind
+ this wp_tablet_pad. This information may be used to gather additional
+ information about the device, e.g. through libwacom.
+
+ The format of the path is unspecified, it may be a device node, a
+ sysfs path, or some other identifier. It is up to the client to
+ identify the string provided.
+
+ This event is sent in the initial burst of events before the
+ wp_tablet_pad.done event.
+ </description>
+ <arg name="path" type="string" summary="path to local device"/>
+ </event>
+
+ <event name="buttons">
+ <description summary="buttons announced">
+ Sent on wp_tablet_pad initialization to announce the available
+ buttons.
+
+ This event is sent in the initial burst of events before the
+ wp_tablet_pad.done event. This event is only sent when at least one
+ button is available.
+ </description>
+ <arg name="buttons" type="uint" summary="the number of buttons"/>
+ </event>
+
+ <event name="done">
+ <description summary="pad description event sequence complete">
+ This event signals the end of the initial burst of descriptive
+ events. A client may consider the static description of the pad to
+ be complete and finalize initialization of the pad.
+ </description>
+ </event>
+
+ <enum name="button_state">
+ <description summary="physical button state">
+ Describes the physical state of a button that caused the button
+ event.
+ </description>
+ <entry name="released" value="0" summary="the button is not pressed"/>
+ <entry name="pressed" value="1" summary="the button is pressed"/>
+ </enum>
+
+ <event name="button">
+ <description summary="physical button state">
+ Sent whenever the physical state of a button changes.
+ </description>
+ <arg name="time" type="uint" summary="the time of the event with millisecond granularity"/>
+ <arg name="button" type="uint" summary="the index of the button that changed state"/>
+ <arg name="state" type="uint" enum="button_state"/>
+ </event>
+
+ <event name="enter">
+ <description summary="enter event">
+ Notification that this pad is focused on the specified surface.
+ </description>
+ <arg name="serial" type="uint" summary="serial number of the enter event"/>
+ <arg name="tablet" type="object" interface="zwp_tablet_v2" summary="the tablet the pad is attached to"/>
+ <arg name="surface" type="object" interface="wl_surface" summary="surface the pad is focused on"/>
+ </event>
+
+ <event name="leave">
+ <description summary="enter event">
+ Notification that this pad is no longer focused on the specified
+ surface.
+ </description>
+ <arg name="serial" type="uint" summary="serial number of the leave event"/>
+ <arg name="surface" type="object" interface="wl_surface" summary="surface the pad is no longer focused on"/>
+ </event>
+
+ <event name="removed">
+ <description summary="pad removed event">
+ Sent when the pad has been removed from the system. When a tablet
+ is removed its pad(s) will be removed too.
+
+ When this event is received, the client must destroy all rings, strips
+ and groups that were offered by this pad, and issue wp_tablet_pad.destroy
+ the pad itself.
+ </description>
+ </event>
+ </interface>
</protocol>
--
2.7.4
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