147 lines
5.8 KiB
Groff
147 lines
5.8 KiB
Groff
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.\"
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.\" $XFree86: xc/doc/man/Xi/XAllDvEv.man,v 1.2 2001/01/27 18:20:20 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: XAllDvEv.man,v 1.3 2000/08/17 19:41:55 cpqbld Exp $
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.ds xL Programming With Xlib
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.TH XAllowDeviceEvents 3X11 __xorgversion__ "X FUNCTIONS"
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.SH NAME
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XAllowDeviceEvents \- release queued events
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.SH SYNTAX
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.HP
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int XAllowDeviceEvents\^(\^Display *\fIdisplay\fP\^, XDevice *\fIdevice\fP\^,
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int \fIevent_mode\fP\^, Time \fItime\fP\^);
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.SH ARGUMENTS
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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 from which events are to be allowed.
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.TP 12
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.I event_mode
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Specifies the event mode.
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You can pass
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\fIAsyncThisDevice\fP,
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\fISyncThisDevice\fP,
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\fIReplayThisDevice\fP,
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\fIAsyncOtherDevices\fP,
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\fISyncAll\fP,
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or
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\fIAsyncAll\fP.
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.TP 12
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.I time
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Specifies the time.
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You can pass either a timestamp or
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\fICurrentTime\fP.
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.SH DESCRIPTION
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The
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\fIXAllowDeviceEvents\fP
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function releases some queued events if the client has caused a device
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to freeze.
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It has no effect if the specified time is earlier than the last-grab
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time of the most recent active grab for the client and device,
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or if the specified time is later than the current X server time.
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.LP
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The following describes the processing that occurs depending on what
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constant you pass to the event_mode argument.
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.TP 12
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\fIAsyncThisDevice\fP
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If the specified device is frozen by the client, event processing for that
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device continues as usual. If the device is frozen multiple times by the client
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on behalf of multiple separate grabs, \fIAsyncThisDevice\fP thaws for all.
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\fIAsyncThisDevice\fP has no effect if the specified device is not frozen by
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the client, but the device need not be grabbed by the client.
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.TP 12
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\fISyncThisDevice\fP
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If the specified device is frozen and actively grabbed by the client, event
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processing for that device continues normally until the next key or button
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event is reported to the client. At this time, the specified device
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again appears to freeze. However, if the reported event causes the grab
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to be released, the specified device does not freeze. \fISyncThisDevice\fP
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has no effect if the specified device is not frozen by the client or is not
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grabbed by the client.
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.TP 12
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\fIReplayThisDevice\fP
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If the specified device is actively grabbed by the client and is frozen as
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the result of an event having been sent to the client (either from the
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activation of a GrabDeviceButton or from a previous AllowDeviceEvents with
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mode SyncThisDevice, but not from a GrabDevice), the grab is released and that
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event is completely reprocessed. This time, however, the request ignores
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any passive grabs at or above (toward the root) that the grab-window of the
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grab just released. The request has no effect if the specified device is
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not grabbed by the client or if it is not frozen as the result of an event.
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.TP 12
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\fIAsyncOtherDevices\fP
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If the remaining devices are frozen by the client, event processing for them
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continues as usual. If the other devices are frozen multiple times by the
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client on behalf of multiple grabs, \fIAsyncOtherDevices\fP "thaws" for
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all. \fIAsyncOtherDevices\fP has no effect if the devices are not frozen
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by the client.
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.TP 12
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\fISyncAll\fP
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If all devices are frozen by the client, event processing (for all devices)
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continues normally until the next button or key event is reported to the
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client for a grabbed device, at which time all devices again appear to freeze.
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However, if the reported event causes the grab to be released, then the devices
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do not freeze. If any device is still grabbed, then a subsequent event for it
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will still cause all devices to freeze. \fISyncAll\fP has no
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effect unless all devices are frozen by the client. If any device is
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frozen twice by the client on behalf of two separate grabs, \fISyncAll\fP thaws
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for both. A subsequent freeze for \fISyncAll\fP will only
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freeze each device once.
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.TP 12
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\fIAsyncAll\fP
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If all devices are frozen by the client, event processing for all devices
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continues normally. If any device is frozen multiple times by the client
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on behalf of multiple separate grabs, \fIAsyncAll\fP thaws for
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all. \fIAsyncAll\fP has no effect unless all devices are frozen by
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the client.
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.LP
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\fIAsyncThisDevice\fP,
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\fISyncThisDevice\fP,
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and
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\fIReplayThisDevice\fP
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have no effect on the processing of events from the remaining devices.
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\fIAsyncOtherDevices\fP
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has no effect on the processing of events from the specified device. When
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the event_mode is
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\fISyncAll\fP
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or
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\fIAsyncAll\fP,
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the device parameter is ignored.
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.LP
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It is possible for several grabs of different devices by the same or
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different clients to be active simultaneously. If a device is frozen on
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behalf of any grab, no event processing is performed for the device.
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It is possible for a single device to be frozen because of several grabs.
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In this case, the freeze must be released on behalf of each grab before
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events can again be processed.
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.LP
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\fIXAllowDeviceEvents\fP
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can generate a \fIBadDevice\fP or
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\fIBadValue\fP
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error.
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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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\fIBadValue\fP
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An invalid mode was specified on the request.
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.SH "SEE ALSO"
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XGrabDevice(3X11)
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.br
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\fI\*(xL\fP
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