1/****************************************************************************
2 * Copyright (C) 2016 Intel Corporation.   All Rights Reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
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19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 * @file archrast.h
24 *
25 * @brief Definitions for the event manager.
26 *
27 ******************************************************************************/
28#pragma once
29
30#include "common/os.h"
31
32#include "gen_ar_event.hpp"
33#include "gen_ar_eventhandler.hpp"
34
35#include <vector>
36
37namespace ArchRast
38{
39    //////////////////////////////////////////////////////////////////////////
40    /// EventManager - interface to dispatch events to handlers.
41    /// Event handling occurs only on a single thread.
42    //////////////////////////////////////////////////////////////////////////
43    class EventManager
44    {
45    public:
46        EventManager() {}
47
48        ~EventManager()
49        {
50            // Event manager owns destroying handler objects once attached.
51            ///@note See comment for Detach.
52            for (auto pHandler : mHandlers)
53            {
54                delete pHandler;
55            }
56        }
57
58        void Attach(EventHandler* pHandler)
59        {
60            SWR_ASSERT(pHandler != nullptr);
61            mHandlers.push_back(pHandler);
62        }
63
64        void Dispatch(const Event& event)
65        {
66            ///@todo Add event filter check here.
67
68            for (auto pHandler : mHandlers)
69            {
70                event.Accept(pHandler);
71            }
72        }
73
74        void FlushDraw(uint32_t drawId)
75        {
76            for (auto pHandler : mHandlers)
77            {
78                pHandler->FlushDraw(drawId);
79            }
80        }
81
82    private:
83        // Handlers stay registered for life
84        void Detach(EventHandler* pHandler) { SWR_INVALID("Should not be called"); }
85
86        std::vector<EventHandler*> mHandlers;
87    };
88}; // namespace ArchRast
89