XkbResizeDeviceButtonActions man page

XkbResizeDeviceButtonActions — Allocate additional space for button actions in an XkbDeviceInfoRec structure


Status XkbResizeDeviceButtonActions (XkbDeviceInfoPtr device_info, unsigned int new_total);


- device_info

structure in which to allocate button actions

- new_total

new total number of button actions needed


XkbResizeDeviceButtonActions reallocates space, if necessary, to make sure there is room for a total of new_total button actions in the device_info structure. Any new entries allocated are zeroed. If successful, XkbResizeDeviceButtonActions returns Success. If new_total is zero, all button actions are deleted, device_info->num_btns is set to zero, and device_info->btn_acts is set to NULL. If device_info is invalid or new_total is greater than 255, BadValue is returned. If a memory allocation failure occurs, a BadAlloc is returned.

To free an XkbDeviceInfoRec structure, use XkbFreeDeviceInfo.


Information about X Input Extension devices is transferred between a client program and the Xkb  extension in an XkbDeviceInfoRec structure:

    typedef struct {
        char *               name;          /∗ name for device */
        Atom                 type;          /∗ name for class of devices */
        unsigned short       device_spec;   /∗ device of interest */
        Bool                 has_own_state; /∗ True=>this device has its own state */
        unsigned short       supported;     /∗ bits indicating supported capabilities */
        unsigned short       unsupported;   /∗ bits indicating unsupported capabilities */
        unsigned short       num_btns;      /∗ number of entries in btn_acts */
        XkbAction *          btn_acts;      /∗ button actions */
        unsigned short       sz_leds;       /∗ total number of entries in LEDs vector */
        unsigned short       num_leds;      /∗ number of valid entries in LEDs vector */
        unsigned short       dflt_kbd_fb;   /∗ input extension ID of default (core kbd) indicator */
        unsigned short       dflt_led_fb;   /∗ input extension ID of default indicator feedback */
        XkbDeviceLedInfoPtr  leds;          /∗ LED descriptions */
    } XkbDeviceInfoRec, *XkbDeviceInfoPtr;



Unable to allocate storage


An argument is out of range

See Also


Referenced By


libX11 1.6.4 X Version 11 XKB FUNCTIONS