XIGrabKeycode3

Grab/ungrab buttons or keys

Part of XIGrabButton(3).

Usage

int XIGrabButton( Display *display,

Window grab_window,

int grab_mode,

int paired_device_mode,

Bool owner_events,

XIEventMask *mask,

int num_modifiers,

XIGrabModifiers *modifiers_inout);

int XIUngrabButton( Display *display,

Window grab_window,

int num_modifiers,

XIGrabModifiers *modifiers);

int XIGrabKeycode( Display *display,

Window grab_window,

int grab_mode,

int paired_device_mode,

Bool owner_events,

XIEventMask *mask,

int num_modifiers,

XIGrabModifiers *modifiers_inout);

int XIUngrabKeycode( Display *display,

Window grab_window,

int num_modifiers,

XIGrabModifiers *modifiers);

int XIGrabTouchBegin( Display *display,

Window grab_window,

Bool owner_events,

XIEventMask *mask,

int num_modifiers,

XIGrabModifiers *modifiers_inout);

int XIUngrabTouchBegin( Display *display,

Window grab_window,

int num_modifiers,

XIGrabModifiers *modifiers);

Window grab_window,

int grab_mode,

int paired_device_mode,

int owner_events,

XIEventMask *mask,

int num_modifiers,

XIGrabModifiers *modifiers_inout);

Window grab_window,

int num_modifiers,

XIGrabModifiers *modifiers);

Window grab_window,

int grab_mode,

int paired_device_mode,

int owner_events,

XIEventMask *mask,

int num_modifiers,

XIGrabModifiers *modifiers_inout);

Window grab_window,

int num_modifiers,

XIGrabModifiers *modifiers);

display

device

Specifies the device that is to be grabbed or released

button

Specifies the device button that is to be grabbed or

released or XIAnyButton.

keycode

Specifies the keycode that is to be grabbed or released

or XIAnyKeycode.

num_modifiers

Number of elements in modifiers or modifiers_inout.

modifiers

Specifies the set of latched and base modifiers or

consistency with the respective grab request and the

modifiers_inout

Specifies the set of latched and base modifiers or

grab_window

owner_events

Specifies a Boolean value that indicates whether the are

to be reported as usual or reported with respect to the

mask

grab_mode

You can pass XIGrabModeSync or XIGrabModeAsync.

paired_device_mode

Specifies further processing of events from the paired

XIGrabModeAsync. If deviceid specifies a floating slave

Overview

XIGrabButton, XIGrabKeycode, XIGrabTouchBegin, XIGrabPinchGestureBegin,
XIGrabSwipeTouchBegin establish a passive grab.
The modifier device for a button grab is the paired master device
if deviceid specifies a master pointer. Otherwise, the modifier
device is the device specified with deviceid. In the future,
the device is actively grabbed (as for XIGrabDevice, the
last-grab time is set to the time at which the button or keycode
was pressed and the XI_ButtonPress or XI_KeyPress event is
reported if all of the following conditions are true:
  * The device is not grabbed, and the specified button or
    keycode is logically pressed, a touch or a gesture event occurs when the
    specified modifier keys are logically down on the modifier device
    and no other buttons or modifier keys are logically down.
  * Either the grab window is an ancestor of (or is) the focus
    window, OR the grab window is a descendent of the focus
    window and contains the device.
  * A passive grab on the same button/modifier combination does
    not exist on any ancestor of grab_window.

The interpretation of the remaining arguments is as for
XIGrabDevice. The active grab is terminated automatically when
the logical state of the device has all buttons or keys
released (independent of the logical state of the modifier
keys).

If the device is an attached slave device, the device is
automatically detached from the master device when the grab
activates and reattached to the same master device when the
grab deactivates. If the master device is removed while the
device is floating as a result of a grab, the device remains
floating once the grab deactivates.

Note that the logical state of a device (as seen by client
applications) may lag the physical state if device event
processing is frozen.

This request overrides all previous grabs by the same client on
the same button/modifier or keycode/modifier combinations on the
same window. A modifiers of XIAnyModifier is equivalent to
issuing the grab request for all possible modifier combinations
(including the combination of no modifiers). It is not required
that all modifiers specified have currently assigned KeyCodes.
A button of XIAnyButton is equivalent to issuing the request
for all possible buttons. Otherwise, it is not required that
the specified button currently be assigned to a physical
button.

If some other client has already issued a XIGrabButton or
XIGrabKeycode with the same button/modifier or keycode/modifier
combination on the same window, a BadAccess error results. When
using XIAnyModifier or XIAnyButton , the request fails
completely, and a XIBadAccess error results (no grabs are
established) if there is a conflicting grab for any
combination. XIGrabButton and XIGrabKeycode have no effect on an
active grab.

On success, XIGrabButton, XIGrabKeycode, XIGrabTouchBegin,
XIGrabPinchGestureBegin and XIGrabSwipeGestureBegin return 0;
If one or more modifier combinations could not be grabbed,
XIGrabButton, XIGrabKeycode, XIGrabTouchBegin, XIGrabPinchGestureBegin
and XIGrabSwipeGestureBegin return the number of
failed combinations and modifiers_inout contains the failed combinations
and their respective error codes.

XIGrabButton, XIGrabKeycode, XIGrabTouchBegin, XIGrabPinchGestureBegin
and XIGrabSwipeGestureBegin can generate BadClass,
BadDevice, BadMatch, BadValue, and BadWindow errors.

XIUngrabButton, XIUngrabKeycode, XIUngrabTouchBegin, XIUngrabPinchGestureBegin
and XIUngrabSwipeGestureBegin release the
passive grab for a button/modifier, keycode/modifier or touch/modifier
combination on the specified window if it was grabbed by this client. A
modifier of XIAnyModifier is equivalent to issuing the ungrab request
for all possible modifier combinations, including the
combination of no modifiers. A button of XIAnyButton is
equivalent to issuing the request for all possible buttons.
XIUngrabButton and XIUngrabKeycode have no effect on an active
grab.

XIUngrabButton, XIUngrabKeycode, XIUngrabTouchBegin,
XIUngrabPinchGestureBegin and XIUngrabSwipeGestureBegin can generate
BadDevice, BadMatch, BadValue and BadWindow errors.

Return value

XIGrabButton, XIGrabKeycode, XIGrabTouchBegin and
XIGrabPinchGestureBegin and XIGrabSwipeGestureBegin return the number of
modifier combination that could not establish a passive grab. The
modifiers are returned in modifiers_inout, along with the respective
error for this modifier combination. If XIGrabButton, XIGrabKeycode
or XIGrabTouchBegin return zero, passive grabs with all requested
modifier combinations were established successfully.

Diagnostics

BadDevice
       An invalid deviceid was specified.

BadMatch
       This error may occur if XIGrabButton specified a device
       that has no buttons, or XIGrabKeycode specified a device
       that has no keys,
       or XIGrabTouchBegin specified a device that is not touch-capable,
       or XIGrabPinchGestureBegin specified a device that is not gesture-capable,
       or XIGrabSwipeGestureBegin specified a device that is not gesture-capable.

BadValue
       Some numeric value falls outside the range of values
       accepted by the request. Unless a specific range is
       specified for an argument, the full range defined by the
       argument's type is accepted. Any argument defined as a
       set of alternatives can generate this error.

BadWindow
       A value for a Window argument does not name a defined
       Window.

History

Debian 13 (Trixie): the text shown here
Debian 12 (Bookworm)
Debian 11 (Bullseye)
Debian 10 (Buster) to Debian 8 (Jessie)
Debian 7 (Wheezy)
Debian 6.0 (Squeeze)

Usage

Overview

Return value

Diagnostics

History

See also