NAME
SYNOPSIS
DESCRIPTION
EXAMPLES
DIAGNOSTICS
XIQueryVersion − announce and query the support XI2 version.
#include <X11/extensions/XInput2.h>
Status
XIQueryVersion( Display *display,
int *major_version_inout,
int *minor_version_inout);
display
Specifies the connection to the X server.
major_version_inout
Specifies the client´s supported XI2 version, and
returns the server´s supported version.
minor_version_inout
Specifies the client´s supported XI2 version, and
returns the server´s supported version.
XIQueryVersion
announces the client´s supported XI2 version to
the server and returns server´s supported X Input
version. Clients
are required to use XIQueryVersion instead of
XGetExtensionVersion
if they use XI2 calls. The server may treat a client
differently
depending on the supported version announced by the client.
The major_version_inout must be 2 or greater, otherwise a
BadValue
error occurs.
If the server
does not support XI2, XIQueryVersion returns BadRequest
to the client. Otherwise, XIQueryVersion returns Success. In
both
cases major_version_inout and minor_version_inout are set to
the
server´s supported version.
XIQueryVersion can generate a BadValue error.
int rc;
int major = 2;
int minor = 0;
rc =
XIQueryVersion(dpy, &major, &minor);
if (rc == Success)
printf("XI2 supported. (%d.%d)\n", major, minor);
else if (rc == BadRequest)
printf("No XI2 support. (%d.%d only)\n", major,
minor);
else
printf("Internal error\n");
BadValue
A value is outside of the permitted range.