242 lines
6.0 KiB
Groff
242 lines
6.0 KiB
Groff
'\" t
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.\" Title: xselectextensionevent
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.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
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.\" Generator: DocBook XSL Stylesheets v1.77.1 <http://docbook.sf.net/>
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.\" Date: 03/09/2013
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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 "XSELECTEXTENSIONEVEN" "libmansuffix" "03/09/2013" "\ \&" "\ \&"
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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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XSelectExtensionEvent, XGetSelectedExtensionEvents \- select extension events, get the list of currently selected extension 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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XSelectExtensionEvent( Display *display,
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Window w,
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XEventClass *event_list,
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int event_count);
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.fi
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.sp
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.nf
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XGetSelectedExtensionEvents( Display *display,
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Window w,
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int *this_client_event_count_return,
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XEventClass **this_client_event_list_return,
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int *all_clients_event_count_return,
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XEventClass **all_clients_event_list_return);
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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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w
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Specifies the window whose events you are interested in\&.
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.fi
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.sp
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.nf
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event_list
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Specifies the list of event classes that describe the
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events you are interested in\&.
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.fi
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.sp
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.nf
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event_count
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Specifies the count of event classes in the event list\&.
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.fi
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.sp
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.nf
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this_client_event_count_return
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Returns the count of event classes selected by this
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client\&.
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.fi
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.sp
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.nf
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this_client_event_list_return
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Returns a pointer to the list of event classes selected
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by this client\&.
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.fi
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.sp
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.nf
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all_clients_event_count_return
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Returns the count of event classes selected by all
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clients\&.
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.fi
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.sp
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.nf
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all_clients_event_list_return
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Returns a pointer to the list of event classes selected
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by all clients\&.
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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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The XSelectExtensionEvent request causes the X server to report
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the events associated with the specified list of event classes\&.
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Initially, X will not report any of these events\&. Events are
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reported relative to a window\&. If a window is not interested in
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a device event, it usually propagates to the closest ancestor
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that is interested, unless the do_not_propagate mask prohibits
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it\&.
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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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Multiple clients can select for the same events on the same
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window with the following restrictions:
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* Multiple clients can select events on the same window
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because their event masks are disjoint\&. When the X server
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generates an event, it reports it to all interested
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clients\&.
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* Only one client at a time can select a DeviceButtonPress
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event with automatic passive grabbing enabled, which is
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associated with the event class DeviceButtonPressGrab\&. To
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receive DeviceButtonPress events without automatic passive
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grabbing, use event class DeviceButtonPress but do not
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specify event class DeviceButtonPressGrab\&.
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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 server reports the event to all interested clients\&.
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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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Information contained in the XDevice structure returned by
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XOpenDevice is used by macros to obtain the event classes that
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clients use in making XSelectExtensionEvent requests\&. Currently
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defined macros include DeviceKeyPress, DeviceKeyRelease,
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DeviceButtonPress, DeviceButtonRelese, DeviceMotionNotify,
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DeviceFocusIn, DeviceFocusOut, ProximityIn, ProximityOut,
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DeviceStateNotify, DeviceMappingNotify, ChangeDeviceNotify,
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DevicePointerMotionHint, DeviceButton1Motion,
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DeviceButton2Motion, DeviceButton3Motion, DeviceButton4Motion,
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DeviceButton5Motion, DeviceButtonMotion, DeviceOwnerGrabButton,
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DeviceButtonPressGrab, and NoExtensionEvent\&.
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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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To obtain the proper event class for a particular device, one
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of the above macros is invoked using the XDevice structure for
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that device\&. For example,
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DeviceKeyPress (*device, type, eventclass);
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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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returns the DeviceKeyPress event type and the eventclass for
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selecting DeviceKeyPress events from this device\&.
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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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XSelectExtensionEvent can generate a BadWindow or BadClass
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error\&. The XGetSelectedExtensionEvents request reports the
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extension events selected by this client and all clients for
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the specified window\&. This request returns pointers to two
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XEventClass arrays\&. One lists the input extension events
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selected by this client from the specified window\&. The other
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lists the event classes selected by all clients from the
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specified window\&. You should use XFree to free these two
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arrays\&.
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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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XGetSelectedExtensionEvents can generate a BadWindow 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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.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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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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.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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BadClass
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A value for an XEventClass is invalid\&.
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.fi
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.if n \{\
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.RE
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.\}
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