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download PDF document: XkbSAPtrDfltValue.3.pdf

XkbSAPtrDfltValue(3) XKB FUNCTIONS XkbSAPtrDfltValue(3)
NAME XkbSAPtrDfltValue - Returns the valueXXX field of act converted to a signed int
SYNOPSIS int XkbSAPtrDfltValue (XkbAction act);
ARGUMENTS act action from which to extract group
DESCRIPTION Actions associated with the XkbPtrDfltAction structure change the mk_dflt_btn attribute of the MouseKeys control.
If the MouseKeys control is not enabled, KeyPress and KeyRelease events are treated as though the action is XkbSA_NoAction. Otherwise, this action changes the mk_dflt_btn attribute of the MouseKeys control.
The type field of the XkbPtrDfltAction structure should always be XkbSA_SetPtrDflt.
The flags field is composed of the bitwise inclusive OR of the values shown in Table 1 (currently there is only one value defined).

Table 1 Pointer Default Flags ----------------------------------------------------------------- Flag Meaning ----------------------------------------------------------------- XkbSA_DfltBtnAbsolute If set, the value field represents an absolute pointer button. Otherwise, the value field represents the amount to be added to the current default button.
The affect field specifies what changes as a result of this action. The only valid value for the affect field is XkbSA_AffectDfltBtn.
The valueXXX field is a signed character that represents the new button value for the mk_dflt_btn attribute of the MouseKeys control. If XkbSA_DfltBtnAbsolute is set in flags, valueXXX specifies the button to be used; otherwise, valueXXX specifies the amount to be added to the current default button. In either case, illegal button choices are wrapped back around into range. Xkb provides macros, to convert between the integer and signed character values in XkbPtrDfltAction structures.
XkbSAPtrDfltValue returns the valueXXX field of act converted to a signed int.
STRUCTURES
typedef struct _XkbPtrDfltAction { unsigned char type; /* XkbSA_SetPtrDflt */ unsigned char flags; /* controls the pointer button number */ unsigned char affect; /* XkbSA_AffectDfltBtn */ char valueXXX; /* new default button member */ } XkbPtrDfltAction;