XkbNoteIndicatorChanges - Online Linux Manual PageSection : 3
Updated : libX11 1.8.4
Source : X Version 11
Note : XKB FUNCTIONS
NAMEXkbNoteIndicatorChanges − Notes the changes in a changes structure
SYNOPSISvoid XkbNoteIndicatorChanges ( XkbIndicatorChangesPtr old , XkbIndicatorNotifyEvent *new , unsigned int wanted );
ARGUMENTSold XkbIndicatorChanges structure to be updated new event from which changes are to be copied wanted which changes are to be noted
DESCRIPTIONWhenever an indicator changes state, the server sends XkbIndicatorStateNotify events to all interested clients. Similarly, whenever an indicator's map changes, the server sends XkbIndicatorMapNotify events to all interested clients. To receive XkbIndicatorStateNotify events, use XkbSelectEvents with both the bits_to_change and values_for_bits parameters containing XkbIndicatorStateNotifyMask. To receive XkbIndicatorMapNotify events, use XkbSelectEvents with XkbIndicatorMapNotifyMask. To receive events for only specific indicators, use XkbSelectEventDetails. Set the event_type parameter to XkbIndicatorStateNotify or XkbIndicatorMapNotify, and set both the bits_to_change and values_for_bits detail parameters to a mask where each bit specifies one indicator, turning on those bits that specify the indicators for which you want to receive events. The changed parameter is a mask that is the bitwise inclusive OR of the indicators that have changed. If the event is of type XkbIndicatorMapNotify, changed reports the maps that changed. If the event is of type XkbIndicatorStateNotify, changed reports the indicators that have changed state. state is a mask that specifies the current state of all indicators, whether they have changed or not, for both XkbIndicatorStateNotify and IndicatorMapNotify events. When your client application receives either a XkbIndicatorStateNotify event or XkbIndicatorMapNotify event, you can note the changes in a changes structure by calling XkbNoteIndicatorChanges. The wanted parameter is the bitwise inclusive OR of XkbIndicatorMapMask and XkbIndicatorStateMask. XkbNoteIndicatorChanges copies any changes reported in new and specified in wanted into the changes record specified by old.
STRUCTURESBoth types of indicator events use the same structure: typedef struct _XkbIndicatorNotify {
int type; /* Xkb extension base event code */
unsigned long serial; /* X server serial number for event */
Bool send_event; /* True => synthetically generated */
Display * display; /* server connection where event generated */
Time time; /* server time when event generated */
int xkb_type; /* specifies state or map notify */
int device; /* Xkb device ID, will not be XkbUseCoreKbd */
unsigned int changed; /* mask of indicators with new state or map */
unsigned int state; /* current state of all indicators */
} XkbIndicatorNotifyEvent;
xkb_type is either XkbIndicatorStateNotify or XkbIndicatorMapNotify, depending on whether the event is a kbIndicatorStateNotify event or kbIndicatorMapNotify event.
SEE ALSOXkbIndicatorMapMask(3), XkbIndicatorStateMask(3), XkbSelectEventDetails(3), XkbSelectEvents(3) 0
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