[PATCH v4 wayland-protocols] Add the tablet protocol
Peter Hutterer
peter.hutterer at who-t.net
Mon Feb 29 07:24:39 UTC 2016
Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
Changes to v3:
- typo fixes as pointed out by daniels
- clarify tablet/seat destroy() requests - they only affect the wayland
object. and because of that:
- destroy is now allowed before a remove event
- reference proximity_out from tool.destroy() to clarify button events on
destroy
Makefile.am | 1 +
unstable/tablet/README | 4 +
unstable/tablet/tablet-unstable-v1.xml | 624 +++++++++++++++++++++++++++++++++
3 files changed, 629 insertions(+)
create mode 100644 unstable/tablet/README
create mode 100644 unstable/tablet/tablet-unstable-v1.xml
diff --git a/Makefile.am b/Makefile.am
index 57d0023..a7f838b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -7,6 +7,7 @@ unstable_protocols = \
unstable/xdg-shell/xdg-shell-unstable-v5.xml \
unstable/relative-pointer/relative-pointer-unstable-v1.xml \
unstable/pointer-constraints/pointer-constraints-unstable-v1.xml \
+ unstable/tablet/tablet-unstable-v1.xml \
$(NULL)
stable_protocols = \
diff --git a/unstable/tablet/README b/unstable/tablet/README
new file mode 100644
index 0000000..7ba8e77
--- /dev/null
+++ b/unstable/tablet/README
@@ -0,0 +1,4 @@
+Tablet protocol
+
+Maintainers:
+Peter Hutterer <peter.hutterer at who-t.net>
diff --git a/unstable/tablet/tablet-unstable-v1.xml b/unstable/tablet/tablet-unstable-v1.xml
new file mode 100644
index 0000000..397ed80
--- /dev/null
+++ b/unstable/tablet/tablet-unstable-v1.xml
@@ -0,0 +1,624 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="tablet_unstable_v1">
+ <copyright>
+ Copyright 2014 © Stephen "Lyude" Chandler Paul
+ Copyright 2015-2016 © Red Hat, Inc.
+
+ Permission is hereby granted, free of charge, to any person
+ obtaining a copy of this software and associated documentation files
+ (the "Software"), to deal in the Software without restriction,
+ including without limitation the rights to use, copy, modify, merge,
+ publish, distribute, sublicense, and/or sell copies of the Software,
+ and to permit persons to whom the Software is furnished to do so,
+ subject to the following conditions:
+
+ The above copyright notice and this permission notice (including the
+ next paragraph) shall be included in all copies or substantial
+ portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.
+ </copyright>
+ <description summary="Wayland protocol for graphics tablets">
+ This description provides a high-level overview of the interplay between
+ the interfaces defined this protocol. For details, see the protocol
+ specification.
+
+ More than one tablet may exist, and device-specifics matter. Tablets are
+ not represented by a single virtual device like wl_pointer. A client
+ binds to the tablet manager object which is just a proxy object. From
+ that, the client requests wp_tablet_manager.get_tablet_seat(wl_seat)
+ and that returns the actual interface that has all the tablets. With
+ this indirection, we can avoid merging wp_tablet into the actual wayland
+ protocol, a long-term benefit.
+
+ The wp_tablet_seat sends a "tablet added" for each tablet connected.
+ That event is followed by descriptive events about the hardware;
+ currently that includes events for name, vid/pid and
+ a wp_tablet.path event that describes a local path. This path can be
+ used to uniquely identify a tablet, or get more information through
+ libwacom. Emulated or nested tablets can skip any of those, e.g. a
+ virtual tablet may not have a vid/pid. The sequence of descriptive
+ events is terminated by a wp_tablet.done event to signal that a client
+ may now finalize any initialization for that tablet.
+
+ Events from tablets require a tool in proximity. Tools are also managed
+ by the tablet seat, a "tool added" is sent whenever a tool is new to
+ the compositor. That event is followed by a number of descriptive events
+ about the hardware; currently that includes capabilities, serial id,
+ hardware serial and tool type. Similar to the tablet interface, a
+ wp_tablet_tool.done event is sent to terminate that initial sequence.
+
+ Any event from a tool happens on the wp_tablet_tool interface. When the
+ tool gets into proximity of the tablet, a proximity_in event is sent on
+ the wp_tablet_tool interface, listing the tablet and the surface. That
+ event is followed by a motion event with the coordinates. After that,
+ it's the usual motion, axis, button, etc. events.
+ The protocol's serialisation means events are grouped by by
+ wp_tablet_tool.frame events.
+
+ Two special events (that don't exist in X) are down and up. They signal
+ "tip touching the surface". For tablets without real proximity
+ detection, the sequence is: proximity_in, motion, down, frame.
+
+ When the tool leaves proximity, a proximity_out event is sent. If any
+ button is still down, a button release event is sent before this
+ proximity event. These button events are sent in the same frame as the
+ proximity event to signal to the client that the buttons were held when
+ the tool left proximity.
+
+ If the tool moves out of the surface but stays in proximity (i.e.
+ between windows), compositor-specific grab policies apply. This usually
+ means that the proximity-out is delayed until all buttons are released.
+
+ Moving a tool physically from one tablet to the other has no real effect
+ on the protocol, since we already have the tool object from the "tool
+ added" event. All the information is already there and the proximity
+ events on both tablets is all a client needs to reconstruct what
+ happened.
+
+ Some extra axes are normalized, i.e. the client knows the range as
+ specified in the protocol (e.g. [0, 65535]), the granularity however is
+ unknown. The current normalized axes are pressure, distance, and slider.
+
+ Other extra axes are in physical units as specified in the protocol.
+ The current extra axes with physical units are tilt, rotation and
+ wheel rotation.
+
+ Since tablets work independently of the pointer controlled by the mouse,
+ the focus handling is independent too and controlled by proximity.
+ The wp_tablet_tool.set_cursor request sets a tool-specific cursor.
+ This cursor surface may be the same as the mouse cursor, and it may be
+ the same across tools but it is possible to be more fine-grained. For
+ example, a client may set different cursors for the pen and eraser.
+
+ Tools are generally independent of tablets and it is
+ compositor-specific policy when a tool can removed. Common approaches
+ will likely include some form of removing a tool when all tablets the
+ tool was used on is removed.
+
+ Warning! The protocol described in this file is experimental and
+ backward incompatible changes may be made. Backward compatible changes
+ may be added together with the corresponding interface version bump.
+ Backward incompatible changes are done by bumping the version number in
+ the protocol and interface names and resetting the interface version.
+ Once the protocol is to be declared stable, the 'z' prefix and the
+ version number in the protocol and interface names are removed and the
+ interface version number is reset.
+ </description>
+ <interface name="zwp_tablet_manager_v1" version="1">
+ <description summary="controller object for graphic tablet devices">
+ An object that provides access to the graphics tablets available on this
+ system. Any tablet is associated with a seat, to get access to the
+ actual tablets, use wp_tablet_manager.get_tablet_seat.
+ </description>
+
+ <request name="get_tablet_seat">
+ <description summary="get the tablet seat">
+ Get the wp_tablet_seat object for the given seat. This object
+ provides access to all graphics tablets in this seat.
+ </description>
+ <arg name="tablet_seat" type="new_id" interface="zwp_tablet_seat_v1"/>
+ <arg name="seat" type="object" interface="wl_seat" summary="The wl_seat object to retrieve the tablets for" />
+ </request>
+
+ <request name="destroy" type="destructor">
+ <description summary="release the memory for the tablet manager object">
+ Destroy the wp_tablet_manager object. Objects created from this
+ object are unaffected and should be destroyed separately.
+ </description>
+ </request>
+ </interface>
+
+ <interface name="zwp_tablet_seat_v1" version="1">
+ <description summary="controller object for graphic tablet devices of a seat">
+ An object that provides access to the graphics tablets available on this
+ seat. After binding to this interface, the compositor sends a set of
+ wp_tablet_seat.tablet_added and wp_tablet_seat.tool_added events.
+ </description>
+
+ <request name="destroy" type="destructor">
+ <description summary="release the memory for the tablet seat object">
+ Destroy the wp_tablet_seat object. Objects created from this
+ object are unaffected and should be destroyed separately.
+ </description>
+ </request>
+
+ <event name="tablet_added">
+ <description summary="new device notification">
+ This event is sent whenever a new tablet becomes available on this
+ seat. This event only provides the object id of the tablet, any
+ static information about the tablet (device name, vid/pid, etc.) is
+ sent through the wp_tablet interface.
+ </description>
+ <arg name="id" type="new_id" interface="zwp_tablet_v1" summary="the newly added graphics tablet"/>
+ </event>
+
+ <event name="tool_added">
+ <description summary="a new tool has been used with a tablet">
+ This event is sent whenever a tool that has not previously been used
+ with a tablet comes into use. This event only provides the object id
+ of the tool, any static information about the tool (capabilities,
+ type, etc.) is sent through the wp_tablet_tool interface.
+ </description>
+ <arg name="id" type="new_id" interface="zwp_tablet_tool_v1" summary="the newly added tablet tool"/>
+ </event>
+ </interface>
+
+ <interface name="zwp_tablet_tool_v1" version="1">
+ <description summary="a physical tablet tool">
+ An object that represents a physical tool that has been, or is
+ currently in use with a tablet in this seat. Each wp_tablet_tool
+ object stays valid until the client destroys it; the compositor
+ reuses the wp_tablet_tool object to indicate that the object's
+ respective physical tool has come into proximity of a tablet again.
+ A client must not call wp_tablet_tool.destroy until it receives a
+ wp_tablet_tool.removed event.
+
+ A wp_tablet_tool object's relation to a physical tool depends on the
+ tablet's ability to report serial numbers. If the tablet supports
+ this capability, then the object represents a specific physical tool
+ and can be identified even when used on multiple tablets.
+
+ A tablet tool has a number of static characteristics, e.g. tool type,
+ hardware_serial and capabilities. These capabilities are sent in an
+ event sequence after the wp_tablet_seat.tool_added event before any
+ actual events from this tool. This initial event sequence is
+ terminated by a wp_tablet_tool.done event.
+
+ Tablet tool events are grouped by wp_tablet_tool.frame events.
+ Any events received before a wp_tablet_tool.frame event should be
+ considered part of the same hardware state change.
+ </description>
+
+ <request name="set_cursor">
+ <description summary="set the tablet tool's surface">
+ Sets the surface of the cursor used for this tool on the given
+ tablet. This request only takes effect if the tool is in proximity
+ of one of the requesting client's surfaces or the surface parameter
+ is the current pointer surface. If there was a previous surface set
+ with this request it is replaced. If surface is NULL, the cursor
+ image is hidden.
+
+ The parameters hotspot_x and hotspot_y define the position of the
+ pointer surface relative to the pointer location. Its top-left corner
+ is always at (x, y) - (hotspot_x, hotspot_y), where (x, y) are the
+ coordinates of the pointer location, in surface local coordinates.
+
+ On surface.attach requests to the pointer surface, hotspot_x and
+ hotspot_y are decremented by the x and y parameters passed to the
+ request. Attach must be confirmed by wl_surface.commit as usual.
+
+ The hotspot can also be updated by passing the currently set pointer
+ surface to this request with new values for hotspot_x and hotspot_y.
+
+ The current and pending input regions of the wl_surface are cleared,
+ and wl_surface.set_input_region is ignored until the wl_surface is no
+ longer used as the cursor. When the use as a cursor ends, the current
+ and pending input regions become undefined, and the wl_surface is
+ unmapped.
+
+ This request gives the surface the role of a cursor. The role
+ assigned by this request is the same as assigned by
+ wl_pointer.set_cursor meaning the same surface can be
+ used both as a wl_pointer cursor and a wp_tablet cursor. If the
+ surface already has another role, it raises a protocol error
+ The surface may be used on multiple tablets and across multiple
+ seats.
+ </description>
+ <arg name="serial" type="uint" summary="serial of the enter event"/>
+ <arg name="surface" type="object" interface="wl_surface" allow-null="true"/>
+ <arg name="hotspot_x" type="int" summary="x coordinate in surface-relative coordinates"/>
+ <arg name="hotspot_y" type="int" summary="y coordinate in surface-relative coordinates"/>
+ </request>
+
+ <request name="destroy" type="destructor">
+ <description summary="destroy the tool object">
+ This destroys the client's resource for this tool object.
+ </description>
+ </request>
+
+ <enum name="type">
+ <description summary="a physical tool type">
+ Describes the physical type of a tool. The physical type of a tool
+ generally defines its base usage.
+
+ The mouse tool represents a mouse-shaped tool that is not a relative
+ device but bound to the tablet's surface, providing absolute
+ coordinates.
+
+ The lens tool is a mouse-shaped tool with an attached lens to
+ provide precision focus.
+ </description>
+ <entry name="pen" value="0x140" summary="Pen"/>
+ <entry name="eraser" value="0x141" summary="Eraser"/>
+ <entry name="brush" value="0x142" summary="Brush"/>
+ <entry name="pencil" value="0x143" summary="Pencil"/>
+ <entry name="airbrush" value="0x144" summary="Airbrush"/>
+ <entry name="finger" value="0x145" summary="Finger"/>
+ <entry name="mouse" value="0x146" summary="Mouse"/>
+ <entry name="lens" value="0x147" summary="Lens"/>
+ </enum>
+
+ <event name="type">
+ <description summary="tool type">
+ The tool type is the high-level type of the tool and usually decides
+ the interaction expected from this tool.
+
+ This event is sent in the initial burst of events before the
+ wp_tablet_tool.done event.
+ </description>
+ <arg name="tool_type" type="uint" enum="type" summary="the physical tool type"/>
+ </event>
+
+ <event name="hardware_serial">
+ <description summary="unique hardware serial number of the tool">
+ If the physical tool can be identified by a unique 64-bit serial
+ number, this event notifies the client of this serial number.
+
+ If multiple tablets are available in the same seat and the tool is
+ uniquely identifiable by the serial number, that tool may move
+ between tablets.
+
+ Otherwise, if the tool has no serial number and this event is
+ missing, the tool is tied to the tablet it first comes into
+ proximity with. Even if the physical tool is used on multiple
+ tablets, separate wp_tablet_tool objects will be created, one per
+ tablet.
+
+ This event is sent in the initial burst of events before the
+ wp_tablet_tool.done event.
+ </description>
+ <arg name="hardware_serial_hi" type="uint" summary="the unique serial number of the tool, most significant bits"/>
+ <arg name="hardware_serial_lo" type="uint" summary="the unique serial number of the tool, least significant bits"/>
+ </event>
+
+ <event name="hardware_id_wacom">
+ <description summary="hardware id notification in Wacom's format">
+ This event notifies the client of a hardware id available on this tool.
+
+ The hardware id is a device-specific 64-bit id that provides extra
+ information about the tool in use, beyond the wl_tool.type
+ enumeration. The format of the id is specific to tablets made by
+ Wacom Inc. For example, the hardware id of a Wacom Grip
+ Pen (a stylus) is 0x802.
+
+ This event is sent in the initial burst of events before the
+ wp_tablet_tool.done event.
+ </description>
+ <arg name="hardware_id_hi" type="uint" summary="the hardware id, most significant bits"/>
+ <arg name="hardware_id_lo" type="uint" summary="the hardware id, least significant bits"/>
+ </event>
+
+ <enum name="capability">
+ <description summary="capability flags for a tool">
+ Describes extra capabilities on a tablet.
+
+ Any tool must provide x and y values, extra axes are
+ device-specific.
+ </description>
+ <entry name="tilt" value="1" summary="Tilt axes"/>
+ <entry name="pressure" value="2" summary="Pressure axis"/>
+ <entry name="distance" value="3" summary="Distance axis"/>
+ <entry name="rotation" value="4" summary="Z-rotation axis"/>
+ <entry name="slider" value="5" summary="Slider axis"/>
+ <entry name="wheel" value="6" summary="Wheel axis"/>
+ </enum>
+
+ <event name="capability">
+ <description summary="tool capability notification">
+ This event notifies the client of any capabilities of this tool,
+ beyond the main set of x/y axes and tip up/down detection.
+
+ One event is sent for each extra capability available on this tool.
+
+ This event is sent in the initial burst of events before the
+ wp_tablet_tool.done event.
+ </description>
+ <arg name="capability" type="uint" enum="capability" summary="the capability"/>
+ </event>
+
+ <event name="done">
+ <description summary="tool description events sequence complete">
+ This event signals the end of the initial burst of descriptive
+ events. A client may consider the static description of the tool to
+ be complete and finalize initialization of the tool.
+ </description>
+ </event>
+
+ <event name="removed">
+ <description summary="tool removed">
+ This event is sent when the tool is removed from the system and will
+ send no further events. Should the physical tool comes back into
+ proximity later, a new wp_tablet_tool object will be created.
+
+ It is compositor-dependent when a tool is removed. A compositor may
+ remove a tool on proximity out, tablet removal or any other reason.
+ A compositor may also keep a tool alive until shutdown.
+
+ If the tool is currently in proximity, a proximity_out event will be
+ sent before the removed event. See wp_tablet_tool.proximity_out for
+ the handling of any buttons logically down.
+
+ When this event is received, the client must wp_tablet_tool.destroy
+ the object.
+ </description>
+ </event>
+
+ <event name="proximity_in">
+ <description summary="proximity in event">
+ Notification that this tool is focused on a certain surface.
+
+ This event can be received when the tool has moved from one surface to
+ another, or when the tool has come back into proximity above the
+ surface.
+
+ If any button is logically down when the tool comes into proximity,
+ the respective button event is sent after the proximity_in event but
+ within the same frame as the proximity_in event.
+ </description>
+ <arg name="serial" type="uint"/>
+ <arg name="tablet" type="object" interface="zwp_tablet_v1" summary="The tablet the tool is in proximity of"/>
+ <arg name="surface" type="object" interface="wl_surface" summary="The current surface the tablet tool is over"/>
+ </event>
+
+ <event name="proximity_out">
+ <description summary="proximity out event">
+ Notification that this tool has either left proximity, or is no
+ longer focused on a certain surface.
+
+ When the tablet tool leaves proximity of the tablet, button release
+ events are sent for each button that was held down at the time of
+ leaving proximity. These events are sent before the proximity_out
+ event but within the same wp_tablet.frame.
+
+ If the tool stays within proximity of the tablet, but the focus
+ changes from one surface to another, a button release event may not
+ be sent until the button is actually released or the tool leaves the
+ proximity of the tablet.
+ </description>
+ </event>
+
+ <event name="down">
+ <description summary="tablet tool is making contact">
+ Sent whenever the tablet tool comes in contact with the surface of the
+ tablet. If the tablet tool moves out of a region while in contact with
+ the surface of the tablet, the client owning said region will receive a
+ wp_tablet.up event, followed by a wp_tablet.proximity_out event and a
+ wp_tablet.frame event.
+
+ Note that this event describes logical contact, not physical
+ contact. On some devices, a compositor may not consider a tool in
+ logical contact until a minimum physical pressure threshold is
+ exceeded.
+ </description>
+ <arg name="serial" type="uint"/>
+ </event>
+
+ <event name="up">
+ <description summary="tablet tool is no longer making contact">
+ Sent whenever the tablet tool stops making contact with the surface of
+ the tablet, or when the tablet tool moves off of a surface while it was
+ making contact with the tablet's surface.
+
+ Note that this event describes logical contact, not physical
+ contact. On some devices, a compositor may not consider a tool out
+ of logical contact until physical pressure falls below a specific
+ threshold.
+ </description>
+ </event>
+
+ <event name="motion">
+ <description summary="motion event">
+ Sent whenever a tablet tool moves.
+ </description>
+ <arg name="x" type="fixed" summary="surface-relative x coordinate"/>
+ <arg name="y" type="fixed" summary="surface-relative y coordinate"/>
+ </event>
+
+ <event name="pressure">
+ <description summary="pressure change event">
+ Sent whenever the pressure axis on a tool changes. The value of this
+ event is normalized to a value between 0 and 65535.
+
+ Note that pressure may be nonzero even when a tool not in logical
+ contact. See the down and up events for more details.
+ </description>
+ <arg name="pressure" type="uint" summary="The current pressure value"/>
+ </event>
+
+ <event name="distance">
+ <description summary="distance change event">
+ Sent whenever the distance axis on a tool changes. The value of this
+ event is normalized to a value between 0 and 65535.
+
+ Note that distance may be nonzero even when a tool is not in logical
+ contact. See the down and up events for more details.
+ </description>
+ <arg name="distance" type="uint" summary="The current distance value"/>
+ </event>
+
+ <event name="tilt">
+ <description summary="tilt change event">
+ Sent whenever one or both of the tilt axes on a tool change. Each tilt
+ value is in 0.01 of a degree, relative to the z-axis of the tablet.
+ The angle is postive when the top of a tool tilts along the positive
+ x or y axis.
+ </description>
+ <arg name="tilt_x" type="int" summary="The current value of the X tilt axis"/>
+ <arg name="tilt_y" type="int" summary="The current value of the Y tilt axis"/>
+ </event>
+
+ <event name="rotation">
+ <description summary="z-rotation change event">
+ Sent whenever the z-rotation axis on the tool changes. The
+ rotation value is in 0.01 of a degree clockwise from the tool's
+ logical neutral position.
+ </description>
+ <arg name="degrees" type="int" summary="The current rotation of the Z axis"/>
+ </event>
+
+ <event name="slider">
+ <description summary="Slider position change event">
+ Sent whenever the slider position on the tool changes. The
+ value is normalized between -65535 and 65535, with 0 as the logical
+ neutral position of the slider.
+
+ The slider is available on e.g. the Wacom Airbrush tool.
+ </description>
+ <arg name="position" type="int" summary="The current position of slider"/>
+ </event>
+
+ <event name="wheel">
+ <description summary="Wheel delta event">
+ Sent whenever the wheel on the tool emits an event. This event
+ contains two values for the same axis change. The degrees value is
+ in 0.01 of a degree in the same orientation as the
+ wl_pointer.vertical_scroll axis. The clicks value is in discrete
+ logical clicks of the mouse wheel. This value may be zero if the
+ movement of the wheel was less than one logical click.
+
+ Clients should choose either value and avoid mixing degrees and
+ clicks. The compositor may accumulate values smaller than a logical
+ click and emulate click events when a certain threshold is met.
+ Thus, wl_tablet_tool.wheel events with non-zero clicks values may
+ have different degrees values.
+ </description>
+ <arg name="degrees" type="int" summary="The wheel delta in 0.01 of a degree"/>
+ <arg name="clicks" type="int" summary="The wheel delta in discrete clicks"/>
+ </event>
+
+ <enum name="button_state">
+ <description summary="physical button state">
+ Describes the physical state of a button which provoked the button event
+ </description>
+ <entry name="released" value="0" summary="button is not pressed"/>
+ <entry name="pressed" value="1" summary="button is pressed"/>
+ </enum>
+
+ <event name="button">
+ <description summary="button event">
+ Sent whenever a button on the tool is pressed or released.
+ </description>
+
+ <arg name="serial" type="uint"/>
+ <arg name="button" type="uint" summary="The button whose state has changed"/>
+ <arg name="state" type="uint" enum="button_state" summary="Whether the button was pressed or released"/>
+ </event>
+
+ <event name="frame">
+ <description summary="frame event">
+ Marks the end of a series of axis and/or button updates from the
+ tablet. The wayland protocol requires axis updates to be sent
+ sequentially, however all events within a frame should be considered
+ one hardware event.
+ </description>
+ <arg name="time" type="uint" summary="The time of the event with millisecond granularity"/>
+ </event>
+
+ <enum name="error">
+ <entry name="role" value="0" summary="given wl_surface has another role"/>
+ </enum>
+ </interface>
+
+ <interface name="zwp_tablet_v1" version="1">
+ <description summary="graphics tablet device">
+ The wp_tablet interface represents one graphics tablet device. The
+ tablet interface itself does not generate events, all events are
+ generated by wp_tablet_tool objects when in proximity above a tablet.
+
+ A tablet has a number of static characteristics, e.g. device name and
+ pid/vid. These capabilities are sent in an event sequence after the
+ wp_tablet_seat.tablet_added event. This initial event sequence is
+ terminated by a wp_tablet.done event.
+ </description>
+
+ <request name="destroy" type="destructor">
+ <description summary="destroy the tablet object">
+ This destroys the client's resource for this tablet object.
+ </description>
+ </request>
+
+ <event name="name">
+ <description summary="tablet device name">
+ This event is sent in the initial burst of events before the
+ wp_tablet.done event.
+ </description>
+ <arg name="name" type="string" summary="the device name"/>
+ </event>
+
+ <event name="id">
+ <description summary="tablet device USB vendor/product id">
+ This event is sent in the initial burst of events before the
+ wp_tablet.done event.
+ </description>
+ <arg name="vid" type="uint" summary="USB vendor id"/>
+ <arg name="pid" type="uint" summary="USB product id"/>
+ </event>
+
+ <event name="path">
+ <description summary="path to the device">
+ A system-specific device path that indicates which device is behind
+ this wp_tablet. This information may be used to gather additional
+ information about the device, e.g. through libwacom.
+
+ A device may have more than one device path, if so, multiple
+ wp_tablet.path events are sent. A device may be emulated and not
+ have a device path, in that case this event will not be sent.
+
+ 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.done event.
+ </description>
+ <arg name="path" type="string" summary="path to local device"/>
+ </event>
+
+ <event name="done">
+ <description summary="tablet 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.
+ </description>
+ </event>
+
+ <event name="removed">
+ <description summary="tablet removed event">
+ Sent when the tablet has been removed from the system. When a tablet
+ is removed, some tools may be removed.
+
+ When this event is received, the client must wp_tablet.destroy
+ the object.
+ </description>
+ </event>
+ </interface>
+</protocol>
--
2.5.0
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