1ALLEGRO_GET_EVENT_TYPE(3) Library Functions Manual ALLEGRO_GET_EVENT_TYPE(3)
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6 ALLEGRO_GET_EVENT_TYPE
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9 #include <allegro5/allegro.h>
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11 #define ALLEGRO_GET_EVENT_TYPE(a, b, c, d) AL_ID(a, b, c, d)
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14 Make an event type identifier, which is a 32-bit integer. Usually, but
15 not necessarily, this will be made from four 8-bit character codes, for
16 example:
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18 #define MY_EVENT_TYPE ALLEGRO_GET_EVENT_TYPE('M','I','N','E')
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20 IDs less than 1024 are reserved for Allegro or its addons. Don't use
21 anything lower than ALLEGRO_GET_EVENT_TYPE(0, 0, 4, 0).
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23 You should try to make your IDs unique so they don't clash with any 3rd
24 party code you may be using. Be creative. Numbering from 1024 is not
25 creative.
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27 If you need multiple identifiers, you could define them like this:
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29 #define BASE_EVENT ALLEGRO_GET_EVENT_TYPE('M','I','N','E')
30 #define BARK_EVENT (BASE_EVENT + 0)
31 #define MEOW_EVENT (BASE_EVENT + 1)
32 #define SQUAWK_EVENT (BASE_EVENT + 2)
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34 /* Alternatively */
35 enum {
36 BARK_EVENT = ALLEGRO_GET_EVENT_TYPE('M','I','N','E'),
37 MEOW_EVENT,
38 SQUAWK_EVENT
39 };
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42 ALLEGRO_EVENT(3), ALLEGRO_EVENT_TYPE_IS_USER(3)
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46Allegro reference manual ALLEGRO_GET_EVENT_TYPE(3)