.\" 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. .\" .\" .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 .TH XGrabButton 3 "libX11 1.8.10" "X Version 11" "XLIB FUNCTIONS" .SH NAME XGrabButton, XUngrabButton \- grab pointer buttons .SH SYNTAX .HP int XGrabButton\^(\^Display *\fIdisplay\fP\^, unsigned int \fIbutton\fP\^, unsigned int \fImodifiers\fP\^, Window \fIgrab_window\fP\^, Bool \fIowner_events\fP\^, unsigned int \fIevent_mask\fP\^, int \fIpointer_mode\fP\^, \fIkeyboard_mode\fP\^, Window \fIconfine_to\fP\^, Cursor \fIcursor\fP\^); .HP int XUngrabButton\^(\^Display *\fIdisplay\fP\^, unsigned int \fIbutton\fP\^, unsigned int \fImodifiers\fP\^, Window \fIgrab_window\fP\^); .SH ARGUMENTS .IP \fIbutton\fP 1i Specifies the pointer button that is to be grabbed or released or .BR AnyButton . .IP \fIconfine_to\fP 1i Specifies the window to confine the pointer in or .BR None . .IP \fIcursor\fP 1i Specifies the cursor that is to be displayed or .BR 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 .B GrabModeSync or .BR GrabModeAsync . .IP \fImodifiers\fP 1i Specifies the set of keymasks or .BR AnyModifier . The mask is the bitwise inclusive OR of the valid keymask bits. .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 .B GrabModeSync or .BR GrabModeAsync . .SH DESCRIPTION The .B XGrabButton function establishes a passive grab. In the future, the pointer is actively grabbed (as for .BR XGrabPointer ), the last-pointer-grab time is set to the time at which the button was pressed (as transmitted in the .B ButtonPress event), and the .B ButtonPress event is reported if all of the following conditions are true: .IP \(bu 5 The pointer is not grabbed, and the specified button is logically pressed when the specified modifier keys are logically down, and no other buttons or modifier keys are logically down. .IP \(bu 5 The grab_window contains the pointer. .IP \(bu 5 The confine_to window (if any) is viewable. .IP \(bu 5 A passive grab on the same button/key combination does not exist on any ancestor of grab_window. .LP The interpretation of the remaining arguments is as for .BR XGrabPointer . The active grab is terminated automatically when the logical state of the pointer has all buttons released (independent of the state of the logical modifier keys), at which point a .B ButtonRelease event is reported to the grabbing window. .LP Note that the logical state of a device (as seen by client applications) may lag the physical state if device event processing is frozen. .LP This request overrides all previous grabs by the same client on the same button/key combinations on the same window. A modifiers of .B AnyModifier is equivalent to issuing the grab request for all possible modifier combinations (including the combination of no modifiers). It is not required that all modifiers specified have currently assigned KeyCodes. A button of .B AnyButton is equivalent to issuing the request for all possible buttons. Otherwise, it is not required that the specified button currently be assigned to a physical button. .LP If some other client has already issued a .B XGrabButton with the same button/key combination on the same window, a .B BadAccess error results. When using .B AnyModifier or .BR AnyButton , the request fails completely, and a .B BadAccess error results (no grabs are established) if there is a conflicting grab for any combination. .B XGrabButton has no effect on an active grab. .LP .B XGrabButton can generate .BR BadCursor , .BR BadValue , and .B BadWindow errors. .LP The .B XUngrabButton function releases the passive button/key combination on the specified window if it was grabbed by this client. A modifiers of .B AnyModifier is equivalent to issuing the ungrab request for all possible modifier combinations, including the combination of no modifiers. A button of .B AnyButton is equivalent to issuing the request for all possible buttons. .B XUngrabButton has no effect on an active grab. .LP .B XUngrabButton can generate .B BadValue and .B BadWindow errors. .SH DIAGNOSTICS .TP 1i .B BadCursor A value for a Cursor argument does not name a defined Cursor. .TP 1i .B 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 .B BadWindow A value for a Window argument does not name a defined Window. .SH "SEE ALSO" XAllowEvents(3), XGrabPointer(3), XGrabKey(3), XGrabKeyboard(3), .br \fI\*(xL\fP