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NAME

       XIGrabEnter, XIUngrabEnter, XIGrabFocusIn, XIUngrabFocusIn -
       grab/ungrab enter or focus in events.

SYNOPSIS

       #include <X11/extensions/XInput.h>

       int XIGrabEnter( Display *display,
                        int deviceid,
                        Window grab_window
                        Cursor cursor,
                        int grab_mode,
                        int paired_device_mode,
                        Bool owner_events,
                        XIEventMask *mask,
                        int num_modifiers,
                        XIGrabModifiers *modifiers_inout);

       int XIUngrabEnter( Display *display,
                          int deviceid,
                          Window grab_window
                          int num_modifiers,
                          XIGrabModifiers *modifiers);

       int XIGrabFocusIn ( Display *display,
                           int deviceid,
                           Window grab_window
                           int grab_mode,
                           int paired_device_mode,
                           Bool owner_events,
                           XIEventMask *mask,
                           int num_modifiers,
                           XIGrabModifiers *modifiers_inout);

       int XIUngrabFocusIn( Display *display,
                            int deviceid,
                            Window grab_window
                            int num_modifiers,
                            XIGrabModifiers *modifiers);
       display
              Specifies the connection to the X server.

       device
              Specifies the device that is to be grabbed or released

       num_modifiers
              Number of elements in modifiers or modifiers_return

       modifiers
              Specifies the set of latched and base modifiers or
              XIAnyModifier to ungrab. The data type is for
              consistency with the respective grab request and the
              status code of the XIGrabModifiers struct is ignored.

       modifiers_inout
              Specifies the set of latched and base modifiers or
              XIAnyModifier to grab. Returns the modifiers that could
              not be grabbed and their status code.

       grab_window
              Specifies the grab window.

       owner_events
              Specifies a Boolean value that indicates whether the are
              to be reported as usual or reported with respect to the
              grab window.

       mask
              Specifies the event mask.

       grab_mode
              Specifies further processing of events from this device.
              You can pass GrabModeSync or GrabModeAsync.

       paired_device_mode
              Specifies further processing of events from the paired
              master device. You can pass GrabModeSync or
              GrabModeAsync. If deviceid specifies a floating slave
              device, this parameter is ignored.

DESCRIPTION

           XIGrabEnter and XIGrabFocusIn establish a passive grab. The
           modifier device for a enter grab is the paired master device if
           deviceid specifies a master pointer. Otherwise, the modifier
           device is the device specified with deviceid.

           For XIGrabEnter and XIGrabFocusIn, in the future, the device is
           actively grabbed (as for XIGrabDevice, the last-grab time is
           set to the time at which the pointer/focus entered window) if
           the device is not grabbed and the pointer has entered the
           grab_window or the focus has been set to the grab_window when
           the specified modifier keys are logically down on the modifier
           device and no other buttons or modifier keys are logically
           down.

           The interpretation of the remaining arguments is as for
           XIGrabDevice. The active grab is terminated automatically when
           the pointer leaves the window or the focus is set to a
           different window (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 of
           the same type and 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.

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

           XIGrabEnter and XIGrabFocusIn can generate BadDevice,
           BadMatch, BadValue, and BadWindow errors.

           XIUngrabEnter and XIUngrabFocusIn releases the passive grab 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. XIUngrabEnter and XIUngrabFocusIn
           have no effect on an active grab.

           XIUngrabEnter and XIUngrabFocusIn can generate BadDevice,
           BadMatch, BadValue and BadWindow errors.

DIAGNOSTICS

           BadDevice
                  An invalid deviceid was specified.

           BadMatch
                  This error may occur if XIGrabEnter specified a device
                  that has no valuators, or XIGrabFocusIn specified a device
                  that has no keys.

           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
                  argumentĀ“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.

SEE ALSO

           XIAllowEvents(3)

[FIXME: source]                   10/02/2009                    XIGRABENTER(3)