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XkbResizeKeyActions

Section: XKB FUNCTIONS (3)
Updated: libX11 1.6.3
Index Return to Main Contents
 

NAME

XkbResizeKeyActions - Change the number of actions bound to a key  

SYNOPSIS

XkbAction * XkbResizeKeyActions (XkbDescRec *xkb, int key, int needed);
     
 

ARGUMENTS

- xkb
keyboard description to change
- key
keycode of key to change
- needed
new number of actions required
 

DESCRIPTION

The xkb parameter points to the keyboard description containing the key whose number of actions is to be changed. The key parameter is the keycode of the key to change, and needed specifies the new number of actions required for the key.

XkbResizeKeyActions reserves the space needed for the actions and returns a pointer to the beginning of the new array that holds the actions. It can change the acts, num_acts, and size_acts fields of xkb->server if it is necessary to reallocate the acts array.

If needed is greater than the current number of keysyms for the key, XkbResizeKeyActions initializes all new actions in the array to NoAction.

Because the number of actions needed by a key is normally computed as width * number of groups, and XkbResizeKeyActions does not modify either the width or number of groups for the key, a discrepancy exists on return from XkbResizeKeyActions between the space allocated for the actions and the number required. The unused entries in the list of actions returned by XkbResizeKeyActions are not preserved across future calls to any of the map editing functions, so you must update the key actions (which updates the width and number of groups for the key) before calling another allocator function. A call to XkbChangeTypesOfKey updates these.

If any allocation errors occur while resizing the number of actions bound to the key, XkbResizeKeyActions returns NULL.  

SEE ALSO

XkbChangeTypesOfKey(3), XkbResizeKeySyms(3)  

NOTES

A change to the number of actions bound to a key should be accompanied by a change in the number of symbols bound to a key. Refer to XkbResizeKeySyms for more information on changing the number of symbols bound to a key.


 

Index

NAME
SYNOPSIS
ARGUMENTS
DESCRIPTION
SEE ALSO
NOTES


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