Application.h

// Copyright (c) 2016-2018 Kiwano - Nomango
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
 
#pragma once
#include <mutex>
#include <kiwano/core/Common.h>
#include <kiwano/base/Module.h>
#include <kiwano/core/Time.h>
#include <kiwano/core/Singleton.h>
#include <kiwano/event/Event.h>
#include <kiwano/platform/Runner.h>
#include <kiwano/platform/Window.h>
#include <kiwano/utils/Timer.h>
 
namespace kiwano
{
 
extern KGE_API int GetVersion();
 
class KGE_API Application : public Singleton<Application>
{
    friend Singleton<Application>;
 
public:
    Application();
 
    virtual ~Application();
 
    void Run(const Settings& settings, const Function<void()>& setup, std::initializer_list<Module*> modules = {});
 
    void Run(RefPtr<Runner> runner);
 
    void Pause();
 
    void Resume();
 
    void Quit();
 
    bool IsPaused() const;
 
    void Use(Module& m);
 
    RefPtr<Runner> GetRunner() const;
 
    RefPtr<Window> GetWindow() const;
 
    void SetTimeScale(float scale_factor);
 
    void DispatchEvent(RefPtr<Event> evt);
 
    void DispatchEvent(Event* evt);
 
    void PerformInMainThread(Function<void()> func);
 
    void UpdateFrame(Duration dt);
 
    void Destroy();
 
private:
    void Update(Duration dt);
 
    void Render();
 
private:
    bool                    running_;
    bool                    is_paused_;
    float                   time_scale_;
    RefPtr<Runner>          runner_;
    RefPtr<Timer>           timer_;
    ModuleList              modules_;
    std::mutex              perform_mutex_;
    Queue<Function<void()>> functions_to_perform_;
};
 
inline RefPtr<Runner> Application::GetRunner() const
{
    return runner_;
}
 
inline RefPtr<Window> Application::GetWindow() const
{
    if (runner_)
        return runner_->GetWindow();
    return nullptr;
}
 
inline bool Application::IsPaused() const
{
    return is_paused_;
}
 
}  // namespace kiwano