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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
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+.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium
+.\"
+.\" Permission is hereby granted, free of charge, to any person obtaining
+.\" a copy of this software and associated documentation files (the
+.\" "Software"), to deal in the Software without restriction, including
+.\" without limitation the rights to use, copy, modify, merge, publish,
+.\" distribute, sublicense, and/or sell copies of the Software, and to
+.\" permit persons to whom the Software is furnished to do so, subject to
+.\" the following conditions:
+.\"
+.\" The above copyright notice and this permission notice shall be included
+.\" in all copies or substantial portions of the Software.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
+.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+.\" OTHER DEALINGS IN THE SOFTWARE.
+.\"
+.\" Except as contained in this notice, the name of the X Consortium shall
+.\" not be used in advertising or otherwise to promote the sale, use or
+.\" other dealings in this Software without prior written authorization
+.\" from the X Consortium.
+.\"
+.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
+.\" Digital Equipment Corporation
+.\"
+.\" Portions Copyright \(co 1990, 1991 by
+.\" Tektronix, Inc.
+.\"
+.\" Permission to use, copy, modify and distribute this documentation for
+.\" any purpose and without fee is hereby granted, provided that the above
+.\" copyright notice appears in all copies and that both that copyright notice
+.\" and this permission notice appear in all copies, and that the names of
+.\" Digital and Tektronix not be used in in advertising or publicity pertaining
+.\" to this documentation without specific, written prior permission.
+.\" Digital and Tektronix makes no representations about the suitability
+.\" of this documentation for any purpose.
+.\" It is provided ``as is'' without express or implied warranty.
+.\"
+.\" $XFree86: xc/doc/man/X11/XGrPntr.man,v 1.2 2001/01/27 18:20:00 dawes Exp $
+.\"
+.ds xT X Toolkit Intrinsics \- C Language Interface
+.ds xW Athena X Widgets \- C Language X Toolkit Interface
+.ds xL Xlib \- C Language X Interface
+.ds xC Inter-Client Communication Conventions Manual
+.na
+.de Ds
+.nf
+.\\$1D \\$2 \\$1
+.ft 1
+.\".ps \\n(PS
+.\".if \\n(VS>=40 .vs \\n(VSu
+.\".if \\n(VS<=39 .vs \\n(VSp
+..
+.de De
+.ce 0
+.if \\n(BD .DF
+.nr BD 0
+.in \\n(OIu
+.if \\n(TM .ls 2
+.sp \\n(DDu
+.fi
+..
+.de FD
+.LP
+.KS
+.TA .5i 3i
+.ta .5i 3i
+.nf
+..
+.de FN
+.fi
+.KE
+.LP
+..
+.de IN \" send an index entry to the stderr
+..
+.de C{
+.KS
+.nf
+.D
+.\"
+.\" choose appropriate monospace font
+.\" the imagen conditional, 480,
+.\" may be changed to L if LB is too
+.\" heavy for your eyes...
+.\"
+.ie "\\*(.T"480" .ft L
+.el .ie "\\*(.T"300" .ft L
+.el .ie "\\*(.T"202" .ft PO
+.el .ie "\\*(.T"aps" .ft CW
+.el .ft R
+.ps \\n(PS
+.ie \\n(VS>40 .vs \\n(VSu
+.el .vs \\n(VSp
+..
+.de C}
+.DE
+.R
+..
+.de Pn
+.ie t \\$1\fB\^\\$2\^\fR\\$3
+.el \\$1\fI\^\\$2\^\fP\\$3
+..
+.de ZN
+.ie t \fB\^\\$1\^\fR\\$2
+.el \fI\^\\$1\^\fP\\$2
+..
+.de hN
+.ie t <\fB\\$1\fR>\\$2
+.el <\fI\\$1\fP>\\$2
+..
+.de NT
+.ne 7
+.ds NO Note
+.if \\n(.$>$1 .if !'\\$2'C' .ds NO \\$2
+.if \\n(.$ .if !'\\$1'C' .ds NO \\$1
+.ie n .sp
+.el .sp 10p
+.TB
+.ce
+\\*(NO
+.ie n .sp
+.el .sp 5p
+.if '\\$1'C' .ce 99
+.if '\\$2'C' .ce 99
+.in +5n
+.ll -5n
+.R
+..
+. \" Note End -- doug kraft 3/85
+.de NE
+.ce 0
+.in -5n
+.ll +5n
+.ie n .sp
+.el .sp 10p
+..
+.ny0
+.TH XGrabPointer __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
+.SH NAME
+XGrabPointer, XUngrabPointer, XChangeActivePointerGrab \- grab the pointer
+.SH SYNTAX
+.HP
+int XGrabPointer\^(\^Display *\fIdisplay\fP\^, Window \fIgrab_window\fP\^,
+Bool \fIowner_events\fP\^, unsigned int \fIevent_mask\fP\^, int
+\fIpointer_mode\fP\^, int \fIkeyboard_mode\fP\^, Window \fIconfine_to\fP\^,
+Cursor \fIcursor\fP\^, Time \fItime\fP\^);
+.HP
+int XUngrabPointer\^(\^Display *\fIdisplay\fP\^, Time \fItime\fP\^);
+.HP
+int XChangeActivePointerGrab\^(\^Display *\fIdisplay\fP\^, unsigned int
+\fIevent_mask\fP\^, Cursor \fIcursor\fP\^, Time \fItime\fP\^);
+.SH ARGUMENTS
+.IP \fIconfine_to\fP 1i
+Specifies the window to confine the pointer in or
+.ZN None .
+.IP \fIcursor\fP 1i
+Specifies the cursor that is to be displayed during the grab or
+.ZN None .
+.IP \fIdisplay\fP 1i
+Specifies the connection to the X server.
+.IP \fIevent_mask\fP 1i
+Specifies which pointer events are reported to the client.
+The mask is the bitwise inclusive OR of the valid pointer event mask bits.
+.IP \fIgrab_window\fP 1i
+Specifies the grab window.
+.IP \fIkeyboard_mode\fP 1i
+Specifies further processing of keyboard events.
+You can pass
+.ZN GrabModeSync
+or
+.ZN GrabModeAsync .
+.IP \fIowner_events\fP 1i
+Specifies a Boolean value that indicates whether the pointer
+events are to be reported as usual or reported with respect to the grab window
+if selected by the event mask.
+.IP \fIpointer_mode\fP 1i
+Specifies further processing of pointer events.
+You can pass
+.ZN GrabModeSync
+or
+.ZN GrabModeAsync .
+.IP \fItime\fP 1i
+Specifies the time.
+You can pass either a timestamp or
+.ZN CurrentTime .
+.SH DESCRIPTION
+The
+.ZN XGrabPointer
+function actively grabs control of the pointer and returns
+.ZN GrabSuccess
+if the grab was successful.
+Further pointer events are reported only to the grabbing client.
+.ZN XGrabPointer
+overrides any active pointer grab by this client.
+If owner_events is
+.ZN False ,
+all generated pointer events
+are reported with respect to grab_window and are reported only if
+selected by event_mask.
+If owner_events is
+.ZN True
+and if a generated
+pointer event would normally be reported to this client,
+it is reported as usual.
+Otherwise, the event is reported with respect to the
+grab_window and is reported only if selected by event_mask.
+For either value of owner_events, unreported events are discarded.
+.LP
+If the pointer_mode is
+.ZN GrabModeAsync ,
+pointer event processing continues as usual.
+If the pointer is currently frozen by this client,
+the processing of events for the pointer is resumed.
+If the pointer_mode is
+.ZN GrabModeSync ,
+the state of the pointer, as seen by
+client applications,
+appears to freeze, and the X server generates no further pointer events
+until the grabbing client calls
+.ZN XAllowEvents
+or until the pointer grab is released.
+Actual pointer changes are not lost while the pointer is frozen;
+they are simply queued in the server for later processing.
+.LP
+If the keyboard_mode is
+.ZN GrabModeAsync ,
+keyboard event processing is unaffected by activation of the grab.
+If the keyboard_mode is
+.ZN GrabModeSync ,
+the state of the keyboard, as seen by
+client applications,
+appears to freeze, and the X server generates no further keyboard events
+until the grabbing client calls
+.ZN XAllowEvents
+or until the pointer grab is released.
+Actual keyboard changes are not lost while the pointer is frozen;
+they are simply queued in the server for later processing.
+.LP
+If a cursor is specified, it is displayed regardless of what
+window the pointer is in.
+If
+.ZN None
+is specified,
+the normal cursor for that window is displayed
+when the pointer is in grab_window or one of its subwindows;
+otherwise, the cursor for grab_window is displayed.
+.LP
+If a confine_to window is specified,
+the pointer is restricted to stay contained in that window.
+The confine_to window need have no relationship to the grab_window.
+If the pointer is not initially in the confine_to window,
+it is warped automatically to the closest edge
+just before the grab activates and enter/leave events are generated as usual.
+If the confine_to window is subsequently reconfigured,
+the pointer is warped automatically, as necessary,
+to keep it contained in the window.
+.LP
+The time argument allows you to avoid certain circumstances that come up
+if applications take a long time to respond or if there are long network
+delays.
+Consider a situation where you have two applications, both
+of which normally grab the pointer when clicked on.
+If both applications specify the timestamp from the event,
+the second application may wake up faster and successfully grab the pointer
+before the first application.
+The first application then will get an indication that the other application
+grabbed the pointer before its request was processed.
+.LP
+.ZN XGrabPointer
+generates
+.ZN EnterNotify
+and
+.ZN LeaveNotify
+events.
+.LP
+Either if grab_window or confine_to window is not viewable
+or if the confine_to window lies completely outside the boundaries of the root
+window,
+.ZN XGrabPointer
+fails and returns
+.ZN GrabNotViewable .
+If the pointer is actively grabbed by some other client,
+it fails and returns
+.ZN AlreadyGrabbed .
+If the pointer is frozen by an active grab of another client,
+it fails and returns
+.ZN GrabFrozen .
+If the specified time is earlier than the last-pointer-grab time or later
+than the current X server time, it fails and returns
+.ZN GrabInvalidTime .
+Otherwise, the last-pointer-grab time is set to the specified time
+.Pn ( CurrentTime
+is replaced by the current X server time).
+.LP
+.ZN XGrabPointer
+can generate
+.ZN BadCursor ,
+.ZN BadValue ,
+and
+.ZN BadWindow
+errors.
+.LP
+The
+.ZN XUngrabPointer
+function releases the pointer and any queued events
+if this client has actively grabbed the pointer from
+.ZN XGrabPointer ,
+.ZN XGrabButton ,
+or from a normal button press.
+.ZN XUngrabPointer
+does not release the pointer if the specified
+time is earlier than the last-pointer-grab time or is later than the
+current X server time.
+It also generates
+.ZN EnterNotify
+and
+.ZN LeaveNotify
+events.
+The X server performs an
+.ZN UngrabPointer
+request automatically if the event window or confine_to window
+for an active pointer grab becomes not viewable
+or if window reconfiguration causes the confine_to window to lie completely
+outside the boundaries of the root window.
+.LP
+The
+.ZN XChangeActivePointerGrab
+function changes the specified dynamic parameters if the pointer is actively
+grabbed by the client and if the specified time is no earlier than the
+last-pointer-grab time and no later than the current X server time.
+This function has no effect on the passive parameters of a
+.ZN XGrabButton .
+The interpretation of event_mask and cursor is the same as described in
+.ZN XGrabPointer .
+.LP
+.ZN XChangeActivePointerGrab
+can generate a
+.ZN BadCursor
+and
+.ZN BadValue
+error.
+.SH DIAGNOSTICS
+.TP 1i
+.ZN BadCursor
+A value for a Cursor argument does not name a defined Cursor.
+.TP 1i
+.ZN 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.
+.TP 1i
+.ZN BadWindow
+A value for a Window argument does not name a defined Window.
+.SH "SEE ALSO"
+XAllowEvents(3X11),
+XGrabButton(3X11),
+XGrabKey(3X11),
+XGrabKeyboard(3X11)
+.br
+\fI\*(xL\fP