1 // Copyright 2019 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "cast/standalone_receiver/sdl_glue.h" 6 7 #include <utility> 8 9 #include "platform/api/task_runner.h" 10 #include "platform/api/time.h" 11 #include "util/osp_logging.h" 12 13 namespace openscreen { 14 namespace cast { 15 SDLEventLoopProcessor(TaskRunner * task_runner,std::function<void ()> quit_callback)16SDLEventLoopProcessor::SDLEventLoopProcessor( 17 TaskRunner* task_runner, 18 std::function<void()> quit_callback) 19 : alarm_(&Clock::now, task_runner), 20 quit_callback_(std::move(quit_callback)) { 21 alarm_.Schedule([this] { ProcessPendingEvents(); }, Alarm::kImmediately); 22 } 23 24 SDLEventLoopProcessor::~SDLEventLoopProcessor() = default; 25 RegisterForKeyboardEvent(SDLEventLoopProcessor::KeyboardEventCallback cb)26void SDLEventLoopProcessor::RegisterForKeyboardEvent( 27 SDLEventLoopProcessor::KeyboardEventCallback cb) { 28 keyboard_callbacks_.push_back(std::move(cb)); 29 } 30 ProcessPendingEvents()31void SDLEventLoopProcessor::ProcessPendingEvents() { 32 // Process all pending events. 33 SDL_Event event; 34 while (SDL_PollEvent(&event)) { 35 if (event.type == SDL_QUIT) { 36 OSP_VLOG << "SDL_QUIT received, invoking quit callback..."; 37 if (quit_callback_) { 38 quit_callback_(); 39 } 40 } else if (event.type == SDL_KEYUP) { 41 for (auto& cb : keyboard_callbacks_) { 42 cb(event.key); 43 } 44 } 45 } 46 47 // Schedule a task to come back and process more pending events. 48 constexpr auto kEventPollPeriod = std::chrono::milliseconds(10); 49 alarm_.ScheduleFromNow([this] { ProcessPendingEvents(); }, kEventPollPeriod); 50 } 51 52 } // namespace cast 53 } // namespace openscreen 54