212 lines
6.7 KiB
Groff
212 lines
6.7 KiB
Groff
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.\"
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.\" $XFree86: xc/doc/man/Xi/XGrDvBut.man,v 1.2 2001/01/27 18:20:21 dawes Exp $
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.\"
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.\"
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.\" Copyright ([\d,\s]*) by Hewlett-Packard Company, Ardent Computer,
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.\"
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.\" Permission to use, copy, modify, distribute, and sell this documentation
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.\" for any purpose and without fee is hereby granted, provided that the above
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.\" copyright notice and this permission notice appear in all copies.
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.\" Ardent, and Hewlett-Packard make no representations about the
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.\" suitability for any purpose of the information in this document. It is
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.\" provided \`\`as is'' without express or implied warranty.
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.\"
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.\" $Xorg: XGrDvBut.man,v 1.3 2000/08/17 19:41:56 cpqbld Exp $
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.ds xL Programming With Xlib
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.TH XGrabDeviceButton 3X11 __xorgversion__ "X FUNCTIONS"
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.SH NAME
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XGrabDeviceButton, XUngrabDeviceButton \- grab/ungrab extension input device buttons
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.SH SYNTAX
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\fB
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.nf
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.HP
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int XGrabDeviceButton\^(\^Display *\fIdisplay\fP\^, XDevice *\fIdevice\fP\^,
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unsigned int \fIbutton\fP\^, unsigned int \fImodifiers\fP\^, XDevice
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*\fImodifier_device\fP\^, Window \fIgrab_window\fP\^, Bool
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\fIowner_events\fP\^, unsigned int \fIevent_count\fP\^, XEventClass
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*\fIevent_list\fP\^, int \fIthis_device_mode\fP\^, int
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\fIother_devices_mode\fP\^);
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.HP
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int XUngrabDeviceButton\^(\^Display *\fIdisplay\fP\^, XDevice *\fIdevice\fP\^,
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unsigned int \fIbutton\fP\^, unsigned int \fImodifiers\fP\^, XDevice
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*\fImodifier_device\fP\^, Window \fIgrab_window\fP\^);
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.fi
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\fP
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.SH ARGUMENTS
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.ds Bu grabbed or released
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.TP 12
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.I display
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Specifies the connection to the X server.
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.TP 12
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.I device
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Specifies the device that is to be \*(Bu
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.TP 12
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.I button
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Specifies the device button that is to be \*(Bu or
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\fIAnyButton\fP.
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.TP 12
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.I modifiers
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Specifies the set of keymasks or
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\fIAnyModifier\fP.
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The mask is the bitwise inclusive OR of the valid keymask bits.
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Valid bits are: Shiftmask, LockMask, ControlMask, Mod1Mask, Mod2Mask,
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Mod3Mask, Mod4Mask, Mod5Mask.
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.TP 12
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.I modifier_device
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specifies the device whose modifiers are to be used. If the modifier_device
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specified is NULL, the X keyboard will be used as the modifier_device.
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.TP 12
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.I grab_window
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Specifies the grab window.
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.TP 12
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.I owner_events
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Specifies a Boolean value that indicates whether the device
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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 list.
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.TP 12
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.I event_count
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Specifies the number of event classes in the event list.
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.TP 12
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.I event_list
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Specifies which events are reported to the client.
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.TP 12
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.I this_device_mode
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Specifies further processing of events from this device.
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You can pass \fIGrabModeSync\fP or \fIGrabModeAsync\fP.
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.TP 12
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.I other_devices_mode
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Specifies further processing of events from all other devices.
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You can pass \fIGrabModeSync\fP or \fIGrabModeAsync\fP.
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.SH DESCRIPTION
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The \fIXGrabDeviceButton\fP request establishes a passive grab.
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In the future,
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the device is actively grabbed (as for \fIXGrabDevice\fP,
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the last-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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\fIDeviceButtonPress\fP
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event), and the
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\fIDeviceButtonPress\fP
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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 device is not grabbed, and the specified button is logically pressed
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when the specified modifier keys are logically down on the specified
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modifier device
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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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Either the grab window is an ancestor of (or is) the focus window, OR
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the grab window is a descendent of the focus window and contains the
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device.
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.IP \(bu 5
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A passive grab on the same button/modifier 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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\fIXGrabDevice\fP.
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The active grab is terminated automatically when the logical state of the
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device has all buttons released
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(independent of the logical state of the modifier keys).
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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/modifier combinations on the same window.
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A modifiers of
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\fIAnyModifier\fP
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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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\fIAnyButton\fP
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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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A modifier_device of NULL indicates that the X keyboard is to be used as the
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modifier_device.
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.LP
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If some other client has already issued a
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\fIXGrabDeviceButton\fP
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with the same button/modifier combination on the same window, a
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\fIBadAccess\fP
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error results.
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When using
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\fIAnyModifier\fP
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or
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\fIAnyButton\fP ,
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the request fails completely,
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and a
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\fIBadAccess\fP
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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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\fIXGrabDeviceButton\fP
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has no effect on an active grab.
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.LP
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\fIXGrabDeviceButton\fP
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can generate
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\fIBadClass\fP,
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\fIBadDevice\fP,
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\fIBadMatch\fP,
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\fIBadValue\fP,
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and
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\fIBadWindow\fP
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errors.
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.P
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The \fIXUngrabDeviceButton\fP
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request releases the passive grab for a
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button/modifier combination on the specified window if
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it was grabbed by this client.
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A modifier of \fIAnyModifier\fP 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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\fIAnyButton\fP
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is equivalent to issuing the
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request for all possible buttons.
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\fIXUngrabDeviceButton\fP
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has no effect on an active grab.
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.LP
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A modifier_device of NULL indicates that the X keyboard should be used as
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the modifier_device.
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.LP
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\fIXUngrabDeviceButton\fP
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can generate
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\fIBadDevice\fP,
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\fIBadMatch\fP,
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\fIBadValue\fP
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and
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\fIBadWindow\fP
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errors.
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.SH DIAGNOSTICS
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.TP 12
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\fIBadDevice\fP
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An invalid device was specified. The specified device does not exist or has
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not been opened by this client via \fIXOpenInputDevice\fP. This error may
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also occur if the specified device is the X keyboard or X pointer device.
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.TP 12
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\fIBadMatch\fP
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This error may occur if an \fIXGrabDeviceButton\fP request was made
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specifying
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a device that has no buttons, or specifying a modifier device
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that has no keys.
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.TP 12
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\fIBadValue\fP
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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. Any argument defined as a set of
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alternatives can generate this error.
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.TP 12
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\fIBadWindow\fP
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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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XAllowDeviceEvents(3X),
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.br
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XGrabDevice(3X),
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.br
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XGrabDeviceKey(3X),
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.br
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\fI\*(xL\fP
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