380 lines
8.8 KiB
Groff
380 lines
8.8 KiB
Groff
'\" t
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.\" Title: xigrabenter
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.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
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.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
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.\" Date: 06/19/2019
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.\" Manual: \ \&
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.\" Source: \ \&
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.\" Language: English
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.\"
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.TH "XIGRABENTER" "libmansuffix" "06/19/2019" "\ \&" "\ \&"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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XIGrabEnter, XIUngrabEnter, XIGrabFocusIn, XIUngrabFocusIn \- grab/ungrab enter or focus in events\&.
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.SH "SYNOPSIS"
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.sp
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.nf
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#include <X11/extensions/XInput\&.h>
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.fi
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.sp
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.nf
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int XIGrabEnter( Display *display,
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int deviceid,
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Window grab_window,
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Cursor cursor,
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int grab_mode,
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int paired_device_mode,
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Bool owner_events,
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XIEventMask *mask,
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int num_modifiers,
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XIGrabModifiers *modifiers_inout);
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.fi
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.sp
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.nf
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int XIUngrabEnter( Display *display,
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int deviceid,
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Window grab_window
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int num_modifiers,
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XIGrabModifiers *modifiers);
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.fi
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.sp
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.nf
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int XIGrabFocusIn ( Display *display,
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int deviceid,
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Window grab_window
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int grab_mode,
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int paired_device_mode,
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Bool owner_events,
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XIEventMask *mask,
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int num_modifiers,
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XIGrabModifiers *modifiers_inout);
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.fi
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.sp
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.nf
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int XIUngrabFocusIn( Display *display,
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int deviceid,
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Window grab_window
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int num_modifiers,
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XIGrabModifiers *modifiers);
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display
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Specifies the connection to the X server\&.
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.fi
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.sp
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.nf
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device
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Specifies the device that is to be grabbed or released
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.fi
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.sp
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.nf
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num_modifiers
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Number of elements in modifiers or modifiers_inout\&.
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.fi
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.sp
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.nf
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modifiers
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Specifies the set of latched and base modifiers or
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XIAnyModifier to ungrab\&. The data type is for
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consistency with the respective grab request and the
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status code of the XIGrabModifiers struct is ignored\&.
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.fi
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.sp
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.nf
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modifiers_inout
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Specifies the set of latched and base modifiers or
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XIAnyModifier to grab\&. Returns the modifiers that could
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not be grabbed and their status code\&.
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.fi
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.sp
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.nf
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grab_window
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Specifies the grab window\&.
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.fi
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.sp
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.nf
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owner_events
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Specifies a Boolean value that indicates whether the are
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to be reported as usual or reported with respect to the
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grab window\&.
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.fi
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.sp
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.nf
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mask
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Specifies the event mask\&.
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.fi
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.sp
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.nf
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grab_mode
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Specifies further processing of events from this device\&.
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You can pass XIGrabModeSync or XIGrabModeAsync\&.
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.fi
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.sp
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.nf
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paired_device_mode
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Specifies further processing of events from the paired
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master device\&. You can pass XIGrabModeSync or
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XIGrabModeAsync\&. If deviceid specifies a floating slave
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device, this parameter is ignored\&.
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.fi
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.SH "DESCRIPTION"
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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XIGrabEnter and XIGrabFocusIn establish a passive grab\&. The
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modifier device for a enter grab is the paired master device if
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deviceid specifies a master pointer\&. Otherwise, the modifier
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device is the device specified with deviceid\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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For XIGrabEnter and XIGrabFocusIn, in the future, the device is
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actively grabbed (as for XIGrabDevice, the last\-grab time is
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set to the time at which the pointer/focus entered window) if
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the device is not grabbed and the pointer has entered the
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grab_window or the focus has been set to the grab_window when
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the specified modifier keys are logically down on the modifier
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device and no other buttons or modifier keys are logically
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down\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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The interpretation of the remaining arguments is as for
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XIGrabDevice\&. The active grab is terminated automatically when
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the pointer leaves the window or the focus is set to a
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different window (independent of the logical state of the
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modifier keys)\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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If the device is an attached slave device, the device is
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automatically detached from the master device when the grab
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activates and reattached to the same master device when the
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grab deactivates\&. If the master device is removed while the
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device is floating as a result of a grab, the device remains
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floating once the grab deactivates\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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Note that the logical state of a device (as seen by client
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applications) may lag the physical state if device event
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processing is frozen\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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This request overrides all previous grabs by the same client of
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the same type and modifier combinations on the same window\&. A
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modifiers of XIAnyModifier is equivalent to issuing the grab
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request for all possible modifier combinations (including the
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combination of no modifiers)\&. It is not required that all
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modifiers specified have currently assigned KeyCodes\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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If some other client has already issued a XIGrabEnter or
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XIGrabFocusIn on the same window, a BadAccess error results\&.
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When using XIAnyModifier, the request fails completely, and a
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XIBadAccess error results (no grabs are established) if there
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is a conflicting grab for any combination\&. XIGrabEnter and
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XIGrabFocusin have no effect on an active grab\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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On success, XIGrabEnter and XIGrabFocusIn return 0;
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If one or more modifier combinations could not be grabbed,
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XIGrabEnter and XIGrabFocusIn return the number of failed
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combinations and modifiers_inout contains the failed combinations
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and their respective status codes\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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XIGrabEnter and XIGrabFocusIn can generate BadDevice,
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BadMatch, BadValue, and BadWindow errors\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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XIUngrabEnter and XIUngrabFocusIn releases the passive grab on
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the specified window if it was grabbed by this client\&. A
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modifier of XIAnyModifier is equivalent to issuing the ungrab
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request for all possible modifier combinations, including the
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combination of no modifiers\&. XIUngrabEnter and XIUngrabFocusIn
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have no effect on an active grab\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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XIUngrabEnter and XIUngrabFocusIn can generate BadDevice,
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BadMatch, BadValue and BadWindow errors\&.
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.fi
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.if n \{\
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.RE
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.\}
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.SH "RETURN VALUE"
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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XIGrabEnter and XIGrabFocusIn return the number of modifier combination
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that could not establish a passive grab\&. The modifiers are returned in
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modifiers_inout, along with the respective error for this modifier
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combination\&. If XIGrabEnter or XIGrabFocusIn return zero, passive grabs
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with all requested modifier combinations were established successfully\&.
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.fi
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.if n \{\
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.RE
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.\}
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.SH "DIAGNOSTICS"
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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BadDevice
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An invalid deviceid was specified\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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BadMatch
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This error may occur if XIGrabEnter specified a device
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that has no valuators, or XIGrabFocusIn specified a device
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that has no keys\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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BadValue
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Some numeric value falls outside the range of values
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accepted by the request\&. Unless a specific range is
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specified for an argument, the full range defined by the
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argument\*(Aqs type is accepted\&. Any argument defined as a
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set of alternatives can generate this error\&.
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.fi
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.if n \{\
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.RE
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.\}
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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BadWindow
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A value for a Window argument does not name a defined
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Window\&.
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.fi
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.if n \{\
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.RE
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.\}
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.SH "BUGS"
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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The protocol headers for XI 2\&.0 did not provide
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XIGrabModeAsync or XIGrabModeSync\&. Use GrabModeSync and
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GrabModeAsync instead, respectively\&.
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.fi
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.if n \{\
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.RE
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.\}
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.SH "SEE ALSO"
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.sp
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.if n \{\
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.RS 4
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.\}
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.nf
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XIAllowEvents(libmansuffix)
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.fi
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.if n \{\
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.RE
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.\}
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