event->is

Documentation
- Reference manual
- Packages
  - XPCE
    - Classes
      - class event
        
        Send methods
        
        event->has_modifier
        
        event->initialise
        
        event->inside
        
        event->is_a
        
        event->is_down
        
        event->is_drag
        
        event->is_up
        
        event->post

event ->is_a: super=event_id

Succeed if the event matches the specifier. The event-specifiers are organised in a hierarchy, represented by @event_tree. This method succeeds if event<-id is at or below the specified node in @event_hierarchy.

This test is the common way to test the identity of events. It is used by handler objects. Note that class gesture provides a more advanced mechanism to deal with mouse events.

ASCII events (event<-id is an integer) are organised as follows:

ascii
    control
        0..31|127
    printable
        32..126
    meta
        128..255

The demo tool Events displays @event-hierarchy.

See also: - event-id
- class event_tree
- object->recogniser