void handler::leave()
{
handler_vector members = handler_members();
if(!members.empty()) {
for(handler_vector::iterator i = members.begin(); i != members.end(); ++i) {
(*i)->leave();
}
} else {
assert(event_contexts.empty() == false);
}
for(std::deque<context>::reverse_iterator i = event_contexts.rbegin(); i != event_contexts.rend(); ++i) {
if(i->remove_handler(this)) {
break;
}
}
has_joined_ = false;
}
void handler::join()
{
if(has_joined_) {
leave(); // should not be in multiple event contexts
}
//join self
event_contexts.back().add_handler(this);
has_joined_ = true;
//instruct members to join
handler_vector members = handler_members();
if(!members.empty()) {
for(handler_vector::iterator i = members.begin(); i != members.end(); ++i) {
(*i)->join();
}
}
}
void sdl_handler::join(context &c)
{
if (has_joined_global_) {
leave_global();
}
if(has_joined_) {
leave(); // should not be in multiple event contexts
}
//join self
c.add_handler(this);
has_joined_ = true;
//instruct members to join
sdl_handler_vector members = handler_members();
if(!members.empty()) {
for(sdl_handler_vector::iterator i = members.begin(); i != members.end(); ++i) {
(*i)->join(c);
}
}
}
