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%%
%% wings_io.erl --
%%
%% This module contains most of the low-level GUI for Wings.
%%
-module(wings_io).
-export([get_matching_events/1]).
-define(EVENT_QUEUE, wings_io_event_queue).
%%%
%%% Input.
%%%
get_matching_events(Filter) ->
Eq = get(?EVENT_QUEUE),
get_matching_events_1(Filter, Eq, [], []).
get_matching_events_1(Filter, Eq0, Match, NoMatch) ->
case queue:out(Eq0) of
{{value,Ev},Eq} ->
case Filter(Ev) of
false ->
get_matching_events_1(Filter, Eq, Match, [Ev|NoMatch]);
true ->
get_matching_events_1(Filter, Eq, [Ev|Match], NoMatch)
end;
{empty,{In,Out}} ->
case Match of
[] -> [];
_ ->
put(?EVENT_QUEUE, {In, lists:reverse(NoMatch, Out)}),
Match
end
end.
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