[Pyallegro] Re: Just a random question about wrapper implementation

[Alberto G. <al...@ti...>]

Hello.
I'm glad to see you are so interested to PyAllegro.

To answer to the question about wrapping global variables, I must say: it
depends on the variable :)
As regards mouse_x, for example, there is a function called
'get_mouse_pos' which returns a 4-tuple of ints: mouse_z, mouse_y,
mouse_z, mouse_b.
For globals which value change only after the invocation of some functions
(for example screen), the solution was to update the value inside that
function, for example:

def set_gfx_mode(card, w, h, v_w, v_h):
    .....
    global screen
    screen = _alpy.get_screen()
    ....

and so on.

Other solutions are possible, especially using __getattr__/__setattr__
(have a look at 'counters' object in alpy.py for example)

There are situations, anyway, where the get/set pair of functions seems
difficult to avoid: I've used it for example to provide access to the
'line' member of BITMAP structs.

I hope the answer is enough: if not, ask it again :-)

Alberto Griggio