219 lines
7.3 KiB
Groff
219 lines
7.3 KiB
Groff
.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium
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.\"
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.\" Permission is hereby granted, free of charge, to any person obtaining
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.\" a copy of this software and associated documentation files (the
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.\" "Software"), to deal in the Software without restriction, including
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.\" without limitation the rights to use, copy, modify, merge, publish,
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.\" distribute, sublicense, and/or sell copies of the Software, and to
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.\" permit persons to whom the Software is furnished to do so, subject to
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.\" the following conditions:
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.\"
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.\" The above copyright notice and this permission notice shall be included
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.\" in all copies or substantial portions of the Software.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
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.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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.\" OTHER DEALINGS IN THE SOFTWARE.
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.\"
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.\" Except as contained in this notice, the name of the X Consortium shall
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.\" not be used in advertising or otherwise to promote the sale, use or
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.\" other dealings in this Software without prior written authorization
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.\" from the X Consortium.
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.\"
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.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
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.\" Digital Equipment Corporation
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.\"
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.\" Portions Copyright \(co 1990, 1991 by
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.\" Tektronix, Inc.
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.\"
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.\" Permission to use, copy, modify and distribute this documentation for
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.\" any purpose and without fee is hereby granted, provided that the above
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.\" copyright notice appears in all copies and that both that copyright notice
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.\" and this permission notice appear in all copies, and that the names of
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.\" Digital and Tektronix not be used in in advertising or publicity pertaining
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.\" to this documentation without specific, written prior permission.
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.\" Digital and Tektronix makes no representations about the suitability
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.\" of this documentation for any purpose.
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.\" It is provided "as is" without express or implied warranty.
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.\"
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.\"
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.ds xT X Toolkit Intrinsics \- C Language Interface
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.ds xW Athena X Widgets \- C Language X Toolkit Interface
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.ds xL Xlib \- C Language X Interface
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.ds xC Inter-Client Communication Conventions Manual
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.TH XGrabButton __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
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.SH NAME
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XGrabButton, XUngrabButton \- grab pointer buttons
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.SH SYNTAX
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.HP
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int XGrabButton\^(\^Display *\fIdisplay\fP\^, unsigned int \fIbutton\fP\^,
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unsigned int \fImodifiers\fP\^, Window \fIgrab_window\fP\^, Bool
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\fIowner_events\fP\^, unsigned int \fIevent_mask\fP\^, int
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\fIpointer_mode\fP\^, \fIkeyboard_mode\fP\^, Window \fIconfine_to\fP\^, Cursor
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\fIcursor\fP\^);
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.HP
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int XUngrabButton\^(\^Display *\fIdisplay\fP\^, unsigned int \fIbutton\fP\^,
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unsigned int \fImodifiers\fP\^, Window \fIgrab_window\fP\^);
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.SH ARGUMENTS
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.IP \fIbutton\fP 1i
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Specifies the pointer button that is to be grabbed or released or
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.BR AnyButton .
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.IP \fIconfine_to\fP 1i
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Specifies the window to confine the pointer in or
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.BR None .
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.IP \fIcursor\fP 1i
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Specifies the cursor that is to be displayed or
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.BR None .
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.IP \fIdisplay\fP 1i
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Specifies the connection to the X server.
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.IP \fIevent_mask\fP 1i
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Specifies which pointer events are reported to the client.
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The mask is the bitwise inclusive OR of the valid pointer event mask bits.
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.IP \fIgrab_window\fP 1i
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Specifies the grab window.
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.IP \fIkeyboard_mode\fP 1i
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Specifies further processing of keyboard events.
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You can pass
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.B GrabModeSync
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or
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.BR GrabModeAsync .
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.IP \fImodifiers\fP 1i
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Specifies the set of keymasks or
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.BR AnyModifier .
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The mask is the bitwise inclusive OR of the valid keymask bits.
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.IP \fIowner_events\fP 1i
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Specifies a Boolean value that indicates whether the pointer
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events are to be reported as usual or reported with respect to the grab window
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if selected by the event mask.
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.IP \fIpointer_mode\fP 1i
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Specifies further processing of pointer events.
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You can pass
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.B GrabModeSync
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or
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.BR GrabModeAsync .
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.SH DESCRIPTION
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The
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.B XGrabButton
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function establishes a passive grab.
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In the future,
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the pointer is actively grabbed (as for
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.BR XGrabPointer ),
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the last-pointer-grab time is set to the time at which the button was pressed
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(as transmitted in the
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.B ButtonPress
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event), and the
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.B ButtonPress
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event is reported if all of the following conditions are true:
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.IP \(bu 5
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The pointer is not grabbed, and the specified button is logically pressed
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when the specified modifier keys are logically down,
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and no other buttons or modifier keys are logically down.
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.IP \(bu 5
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The grab_window contains the pointer.
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.IP \(bu 5
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The confine_to window (if any) is viewable.
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.IP \(bu 5
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A passive grab on the same button/key combination does not exist
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on any ancestor of grab_window.
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.LP
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The interpretation of the remaining arguments is as for
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.BR XGrabPointer .
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The active grab is terminated automatically when the logical state of the
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pointer has all buttons released
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(independent of the state of the logical modifier keys),
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at which point a
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.B ButtonRelease
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event is reported to the grabbing window.
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.LP
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Note that the logical state of a device (as seen by client applications)
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may lag the physical state if device event processing is frozen.
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.LP
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This request overrides all previous grabs by the same client on the same
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button/key combinations on the same window.
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A modifiers of
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.B AnyModifier
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is equivalent to issuing the grab request for all
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possible modifier combinations (including the combination of no modifiers).
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It is not required that all modifiers specified have currently assigned
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KeyCodes.
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A button of
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.B AnyButton
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is equivalent to
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issuing the request for all possible buttons.
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Otherwise, it is not required that the specified button currently be assigned
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to a physical button.
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.LP
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If some other client has already issued a
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.B XGrabButton
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with the same button/key combination on the same window, a
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.B BadAccess
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error results.
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When using
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.B AnyModifier
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or
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.BR AnyButton ,
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the request fails completely,
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and a
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.B BadAccess
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error results (no grabs are
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established) if there is a conflicting grab for any combination.
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.B XGrabButton
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has no effect on an active grab.
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.LP
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.B XGrabButton
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can generate
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.BR BadCursor ,
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.BR BadValue ,
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and
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.B BadWindow
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errors.
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.LP
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The
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.B XUngrabButton
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function releases the passive button/key combination on the specified window if
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it was grabbed by this client.
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A modifiers of
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.B AnyModifier
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is
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equivalent to issuing
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the ungrab request for all possible modifier combinations, including
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the combination of no modifiers.
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A button of
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.B AnyButton
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is equivalent to issuing the
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request for all possible buttons.
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.B XUngrabButton
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has no effect on an active grab.
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.LP
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.B XUngrabButton
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can generate
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.B BadValue
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and
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.B BadWindow
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errors.
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.SH DIAGNOSTICS
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.TP 1i
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.B BadCursor
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A value for a Cursor argument does not name a defined Cursor.
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.TP 1i
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.B BadValue
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Some numeric value falls outside the range of values accepted by the request.
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Unless a specific range is specified for an argument, the full range defined
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by the argument's type is accepted.
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Any argument defined as a set of
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alternatives can generate this error.
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.TP 1i
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.B BadWindow
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A value for a Window argument does not name a defined Window.
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.SH "SEE ALSO"
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XAllowEvents(__libmansuffix__),
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XGrabPointer(__libmansuffix__),
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XGrabKey(__libmansuffix__),
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XGrabKeyboard(__libmansuffix__),
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.br
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\fI\*(xL\fP
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