Allows overriding the action for key_val and modifiers inside a
BindingPool.
See install_action.
When an action has been activated using activate the passed callback
will be invoked (with data).
Actions can be blocked with block_action and then unblocked using unblock_action.
| this | |
| key_val |
key symbol |
| modifiers |
bitmask of modifiers |
| callback |
function to be called when the action is activated |
| data |
data to be passed to |
| notify |
function to be called when the action is removed from the pool |