-Once in a while .... (set_event_filter) +SDL 2.511 + Using SDL for quick visualizations
-
Once in a while
Things just work!
So I have been hacking for a while on SDL::Events::set_event_filter. The code below is an example usage. The magic behind this is here
Once in a while
Things just work!
So I have been hacking for a while on SDL::Events::set_event_filter. The code below is an example usage. The magic behind this is here
1 #!/usr/bin/perl -w
2 use strict;
3 use warnings;
4 use SDL v2.3; #Require the redesign branch
5 use SDL::Video;
6 use SDL::Event;
7 use SDL::Events;
8
9 SDL::init(SDL_INIT_VIDEO);
10 my $display = SDL::Video::set_video_mode(640,480,32, SDL_SWSURFACE );
11 my $event = SDL::Event->new();
12
13 #This filters out all ActiveEvents
14 my $filter = sub {
15 my ($e, $type) = ($_[0], $_[0]->type);
16 if($type == SDL_ACTIVEEVENT){ return 0 }
17 elsif($type == SDL_MOUSEBUTTONDOWN && $e->button_button == 1){ return 0 }
18 else { return 1; }
19 };
20
21 SDL::Events::set_event_filter($filter);
22
23 while(1)
24 {
25
26 SDL::Events::pump_events();
27 if(SDL::Events::poll_event($event))
28 {
29
30 if( $event->type == SDL_ACTIVEEVENT)
31 {
32 print "Hello Mouse!!!\n" if ($event->active_gain && ($event->active_state == SDL_APPMOUSEFOCUS) );
33 print "Bye Mouse!!!\n" if (!$event->active_gain && ($event->active_state == SDL_APPMOUSEFOCUS) );
34 }
35 if( $event->type == SDL_MOUSEBUTTONDOWN)
36 {
37 my ($x, $y, $but ) = ($event->button_x, $event->button_y, $event->button_button);
38 warn "$but CLICK!!! at $x and $y \n";
39 }
40
41 last if($event->type == SDL_QUIT);
42 }
43 }
44 SDL::quit();
Tinker with $filter and look at perldoc lib/SDL/pods/Event.pod.
Have fun,
--yapgh
