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XDeviceBell - ring a bell on a device supported through the input extension
Status
XDeviceBell(display, device, feedbackclass, feedbackid, percent)
Display *display;
XDevice *device;
XID *feedbackclass;
XID *feedbackid;
int *percent;
Specifies the connection to the X server.
Specifies the device with which the bell is associated.
Specifies the class of the feedback with which the bell is
associated.
Specifies the id of the feedback with which the bell is associated.
Specifies the volume in the range -100 to 100 at which
the bell should be rung.
The XDeviceBell request causes the server to ring a bell on the specified feedback of the specified device, if possible. The specified volume is relative to the base volume for the bell. If an invalid device is specified, a BadDevice error will be returned. The feedbackclass and feedbackid parameters contain values returned by an XGetFeedbackControl request and uniquely identify the bell to ring. If a feedbackclass is specified that does not support a bell, or if a nonexistent feedbackid is specified, or a percent value is specified that is not in the range -100 to 100, a BadValue error will be returned.
The volume at which the bell is rung when the percent argument is nonnegative is:
base - [(base * percent) / 100] + percent
The volume at which the bell rings when the percent argument is negative is:
base + [(base * percent) / 100]
To change the base volume of the bell, use XChangeFeedbackControl.
XDeviceBell
can generate a
BadDevice
or a
BadValue
error.
An invalid device was specified. The specified device does
not exist, or has not been opened by this client via
XOpenInputDevice.
An invalid feedbackclass, feedbackid, or percent value was
specified.
XChangeFeedbackControl(3X11), XBell(3X11)
Programming With Xlib