376 lines
9.3 KiB
Groff
376 lines
9.3 KiB
Groff
'\" t
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.\" Title: xigrabbutton
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.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
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.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
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.\" Date: 06/07/2011
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.\" Manual: [FIXME: manual]
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.\" Source: [FIXME: source]
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.\" Language: English
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.\"
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.TH "XIGRABBUTTON" "libmansuffix" "06/07/2011" "[FIXME: source]" "[FIXME: manual]"
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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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XIGrabButton, XIUngrabButton, XIGrabKeycode, XIUngrabKeycode \- grab/ungrab buttons or keys
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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 XIGrabButton( Display *display,
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int deviceid,
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int button,
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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 XIUngrabButton( Display *display,
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int deviceid,
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int button,
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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 XIGrabKeycode( Display *display,
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int deviceid,
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int keycode,
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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 XIUngrabKeycode( Display *display,
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int deviceid,
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int keycode,
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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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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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button
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Specifies the device button that is to be grabbed or
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released or XIAnyButton\&.
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.fi
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.sp
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.nf
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keycode
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Specifies the keycode that is to be grabbed or released
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or XIAnyKeycode\&.
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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_return
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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 GrabModeSync or GrabModeAsync\&.
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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 GrabModeSync or
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GrabModeAsync\&. 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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XIGrabButton and XIGrabKeycode establishes a passive grab\&. The
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modifier device for a button grab is the paired master device
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if deviceid specifies a master pointer\&. Otherwise, the modifier
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device is the device specified with deviceid\&. In the future,
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the device is actively grabbed (as for XIGrabDevice, the
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last\-grab time is set to the time at which the button or keycode
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was pressed and the XI_ButtonPress or XI_KeyPress event is
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reported if all of the following conditions are true:
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* The device is not grabbed, and the specified button or
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keycode is logically pressed when the specified modifier
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keys are logically down on the modifier device and no other
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buttons or modifier keys are logically down\&.
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* Either the grab window is an ancestor of (or is) the focus
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window, OR the grab window is a descendent of the focus
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window and contains the device\&.
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* A passive grab on the same button/modifier combination does
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not exist on any ancestor of grab_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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.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 logical state of the device has all buttons or keys
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released (independent of the logical state of the modifier
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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 on
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the same button/modifier or keycode/modifier combinations on the
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same window\&. A modifiers of XIAnyModifier is equivalent to
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issuing the grab request for all possible modifier combinations
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(including the combination of no modifiers)\&. It is not required
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that all modifiers specified have currently assigned KeyCodes\&.
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A button of XIAnyButton is equivalent to issuing the request
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for all possible buttons\&. Otherwise, it is not required that
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the specified button currently be assigned to a physical
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button\&.
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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 XIGrabButton or
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XIGrabKeycode with the same button/modifier or keycode/modifier
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combination on the same window, a BadAccess error results\&. When
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using XIAnyModifier or XIAnyButton , the request fails
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completely, and a XIBadAccess error results (no grabs are
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established) if there is a conflicting grab for any
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combination\&. XIGrabButton and XIGrabKeycode have no effect on an
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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, XIGrabButton and XIGrabKeycode return 0;
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If one or more modifier combinations could not be grabbed,
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XIGrabButton and XIGrabKeycode 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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XIGrabButton and XIGrabKeycode can generate BadClass, 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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XIUngrabButton and XIUngrabKeycode releases the passive grab for
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a button/modifier or keycode/modifier combination on the
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specified window if it was grabbed by this client\&. A modifier
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of XIAnyModifier is equivalent to issuing the ungrab request
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for all possible modifier combinations, including the
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combination of no modifiers\&. A button of XIAnyButton is
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equivalent to issuing the request for all possible buttons\&.
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XIUngrabButton and XIUngrabKeycode have no effect on an active
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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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XIUngrabButton and XIUngrabKeycode 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 "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 XIGrabButton specified a device
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that has no buttons, or XIGrabKeycode 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 "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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