perl-SDL处理键盘与鼠标

西湖鱼

use SDL;
use SDLx::App;
use SDL::Event;
my $app=SDLx::App->new(w=>400,h=>400,d=>32,t=>"my paint");
my $color =[255,255,255,255];
my $drawing=0;
$app->add_event_handler(\&quit_handle);
$app->add_event_handler(\&key_event);
$app->add_event_handler(\&mouse_event);
$app->run();

sub quit_handle
{
my $event=shift;
my $controller=shift;
$controller->stop() if $event->type==SDL_QUIT;
}
sub key_event
{
my $keyevent=shift;
if ($keyevent->type==SDL_KEYDOWN)
{
my $key_name=SDL::Events::get_key_name($keyevent->key_sym);
if ($key_name=~/^c$/){
$app->draw_rect([0,0,400,400],0);
}
elsif  ($key_name=~/^q$/)
{
$app->stop();
}
else
{
my $col1=int(rand(255));
my $col2=int(rand(255));
my $col3=int(rand(255));
$color =[$col1,$col2,$col3,255];
}   
}
}
sub  mouse_event
{
my $event=shift;
if ($event->type==SDL_MOUSEBUTTONDOWN||$drawing)
{
$drawing=1;
my $x=$event->button_x;
my $y=$event->button_y;
$app->draw_rect([$x,$y,2,2],$color);
$app->update();
}
$drawing=0 if ($event->type==SDL_MOUSEBUTTONUP);
}