Re: [Sdl4fp-users] Event handling

[Matthias <ma...@gm...>]

Hi Samuel,

thanks for your answer. Do you know why I don't have to allocate surface =
pointer even though it is a pointer, too?

Bye,
Matthias
  ----- Original Message -----=20
  From: Samuel Lid=E9n Borell=20
  To: sdl...@li...=20
  Sent: Saturday, February 25, 2006 11:05 PM
  Subject: Re: [Sdl4fp-users] Event handling


  Hi

  You're using a pointer that you haven't allocated yet (then it will be =
NIL). Either you have to allocate it like this:

  VAR event_test:pSDL_EVENT;
  BEGIN
    New(event_test);


  Or you can use a record variable and pass it as a pointer to the =
SDL_PollEvent function (this is what the C code does):


  USES SDL, SDL_VIDEO, SDL_EVENTS;
  VAR event_test: SDL_EVENT;
  ...
  SDL_INIT(SDL_INIT_VIDEO);
  ...
  WHILE SDL_POLLEVENT(@event_test)=3D1 do
  BEGIN
    CASE event_test.eventtype OF
    SDL_KEYDOWN: ...
    SDL_EVENTQUIT: ...
    END;
  END;

  /Samuel

  Matthias wrote:=20
    Anytime the compiler gets to the line with expression =
event_test^.eventtype it stops because protection fault. Actually =
event_test^.eventtype should store an integer-value but allocating it to =
a variable of such kind will also lead to abortion.

    What am I doing wrong?

    Thanks for your help.

    Matthias