Manual Pages for UNIX Operating System command usage for man XChangeDeviceControl

[FIXME: manual]                            XGETDEVICECONTROL(3xi)



NAME
     XGetDeviceControl, XChangeDeviceControl - query and change
     input device controls

SYNOPSIS
     cc [ flag... ] file... -lXi [ library... ]

     #include 

     XDeviceControl *XGetDeviceControl( Display *display,
                                        XDevice *device,
                                        int *controlType);

     int XChangeDeviceControl( Display *display,
                               XDevice *device,
                               int controlType,
                               XDeviceControl *control);

     display
            Specifies the connection to the X server.

     device
            Specifies the device whose control is to be interrogated
            or modified.

     controlType
            Specifies the type of control to be interrogated or
            changed.

     control
            Specifies the address of an XDeviceControl structure
            that contains the new values for the Device.

DESCRIPTION
         These requests are provided to manipulate those input devices
         that support device control. A BadMatch error will be generated
         if the requested device does not support any device controls.

         Valid device control types that can be used with these requests
         include the following:

         DEVICE_RESOLUTION Queries or changes the resolution of
         valuators on input devices.

         The XGetDeviceControl request returns a pointer to an
         XDeviceControl structure.

         XGetDeviceControl can generate a BadDevice or BadMatch error.

         The XChangeDeviceControl request modifies the values of one
         control on the specified device. The control is identified by
         the id field of the XDeviceControl structure that is passed



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[FIXME: manual]                            XGETDEVICECONTROL(3xi)



         with the request.

         XChangeDeviceControl can generate a BadDevice, BadMatch, or
         BadValue error..SH STRUCTURES Each control is described by a
         structure specific to that control. These structures are
         defined in the file XInput.h.

         XDeviceControl is a generic structure that contains two fields
         that are at the beginning of each class of control:

         typedef struct {
             XID class;
             int length;
         } XDeviceControl;

         The XDeviceResolutionState structure defines the information
         that is returned for device resolution for devices with
         valuators.

         typedef struct {
             XID control;
             int length;
             int num_valuators;
             int* resolutions;
             int* min_resolutions;
             int* max_resolutions;
         } XDeviceResolutionState;

         The XDeviceResolutionControl structure defines the attributes
         that can be controlled for keyboard Devices.

         typedef struct {
             XID control;
             int length;
             int first_valuator;
             int num_valuators;
             int* resolutions;
         } XDeviceResolutionControl;

DIAGNOSTICS
         BadDevice
                An invalid device was specified. The specified device
                does not exist or has not been opened by this client via
                XOpenInputDevice. This error may also occur if some
                other client has caused the specified device to become
                the X keyboard or X pointer device via the
                XChangeKeyboardDevice or XChangePointerDevice requests.

         BadMatch
                This error may occur if an XGetDeviceControl request was
                made specifying a device that has no controls or an
                XChangeDeviceControl request was made with an



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[FIXME: manual]                            XGETDEVICECONTROL(3xi)



                XDeviceControl structure that contains an invalid Device
                type. It may also occur if an invalid combination of
                mask bits is specified ( DvKey but no DvAutoRepeatMode
                for keyboard Devices), or if an invalid KeySym is
                specified for a string Device.

         BadValue
                Some numeric value falls outside the range of values
                accepted by the XChangeDeviceControl 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.


ATTRIBUTES
     See attributes(5) for descriptions of the following
     attributes:

     allbox; cw(2.750000i)| cw(2.750000i) lw(2.750000i)|
     lw(2.750000i).  ATTRIBUTE TYPE ATTRIBUTE VALUE
     Availability   x11/library/libxi Interface
     Stability Committed MT-Level  See XInitThreads(3X11)



ATTRIBUTES
     See attributes(5) for descriptions of the following
     attributes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | x11/library/libxi           |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | See XInitThreads(3X11)      |
    |_____________________________|_____________________________|
















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