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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// This Source Code Form is subject to the terms of the Mozilla Public</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// License, v. 2.0. If a copy of the MPL was not distributed with this</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// file, You can obtain one at http://mozilla.org/MPL/2.0/.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> </div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#pragma once</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> </div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <unordered_map></span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <memory></span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <typeindex></span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <list></span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include <iostream></span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">//=============================================================================</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">namespace </span><a class="code" href="namespace_open_g_p.html">OpenGP</a> {</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">//=============================================================================</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">class </span>EventProvider;</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00022"></a><span class="lineno"><a class="line" href="class_open_g_p_1_1_event_sentinel.html"> 22</a></span> <span class="keyword">class </span><a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a> {</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="class_open_g_p_1_1_event_provider.html">EventProvider</a>;</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  std::shared_ptr<int> handle;</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  ~<a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a>() {}</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a>() : handle(<span class="keyword">new</span> <span class="keywordtype">int</span>(0)) {}</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a>(<span class="keyword">const</span> <a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a>(<a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a>&&) = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a> &operator=(<span class="keyword">const</span> <a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a> &operator=(<a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a>&&) = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="class_open_g_p_1_1_event_sentinel.html#ac28d3f5469f37a0cb5bcbbdb78c406b2"> 43</a></span>  <span class="keywordtype">void</span> <a class="code" href="class_open_g_p_1_1_event_sentinel.html#ac28d3f5469f37a0cb5bcbbdb78c406b2">reset</a>() {</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  handle = std::shared_ptr<int>(<span class="keyword">new</span> int(0));</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  }</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> };</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="class_open_g_p_1_1_event_provider.html"> 51</a></span> <span class="keyword">class </span><a class="code" href="class_open_g_p_1_1_event_provider.html">EventProvider</a> {</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  std::unordered_map<std::type_index, std::list<std::function<void(void*)>>> listeners;</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a> own_sentinel;</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="keyword">protected</span>:</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> EventType></div><div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="class_open_g_p_1_1_event_provider.html#a7fac2a2652ccbfeb05c67f7c8c95695b"> 63</a></span>  <span class="keywordtype">void</span> <a class="code" href="class_open_g_p_1_1_event_provider.html#a7fac2a2652ccbfeb05c67f7c8c95695b">send_event</a>(<span class="keyword">const</span> EventType &event) {</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keyword">auto</span> idx = std::type_index(<span class="keyword">typeid</span>(EventType));</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> &wrapper : listeners[idx]) {</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  wrapper(reinterpret_cast<void*>(const_cast<EventType*>(&event)));</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  }</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  }</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="class_open_g_p_1_1_event_provider.html#a90903f76a739ba039fe88d1bff49c652"> 76</a></span>  <span class="keyword">using</span> <a class="code" href="class_open_g_p_1_1_event_provider.html#a90903f76a739ba039fe88d1bff49c652">ListenerHandle</a> = decltype(listeners)::mapped_type::iterator;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> EventType, <span class="keyword">typename</span> ListenerType></div><div class="line"><a name="l00080"></a><span class="lineno"><a class="line" href="class_open_g_p_1_1_event_provider.html#a2182fa1f9ca09ada8b0079d793dca96b"> 80</a></span>  <a class="code" href="class_open_g_p_1_1_event_provider.html#a90903f76a739ba039fe88d1bff49c652">ListenerHandle</a> <a class="code" href="class_open_g_p_1_1_event_provider.html#a2182fa1f9ca09ada8b0079d793dca96b">add_listener</a>(ListenerType listener) {</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">return</span> add_listener<EventType>(listener, own_sentinel);</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  }</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> EventType, <span class="keyword">typename</span> ListenerType></div><div class="line"><a name="l00086"></a><span class="lineno"><a class="line" href="class_open_g_p_1_1_event_provider.html#afe8095ab1acf0e868a960cf896cb96e4"> 86</a></span>  <a class="code" href="class_open_g_p_1_1_event_provider.html#a90903f76a739ba039fe88d1bff49c652">ListenerHandle</a> <a class="code" href="class_open_g_p_1_1_event_provider.html#afe8095ab1acf0e868a960cf896cb96e4">add_listener</a>(ListenerType listener, <span class="keyword">const</span> <a class="code" href="class_open_g_p_1_1_event_sentinel.html">EventSentinel</a> &sentinel) {</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">auto</span> idx = std::type_index(<span class="keyword">typeid</span>(EventType));</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keyword">auto</span> &llist = listeners[idx];</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keyword">auto</span> it = llist.insert(llist.end(), std::function<void(void*)>());</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  std::weak_ptr<void> handle(sentinel.handle);</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  *it = [<span class="keyword">this</span>, listener, it, handle](<span class="keywordtype">void</span> *ptr){</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> </div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">if</span> (<span class="keyword">auto</span> lock = handle.lock()) {</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  listener(*reinterpret_cast<const EventType*>(ptr));</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="comment">// TODO: fix segfault that this causes</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">//remove_listener<EventType>(it);</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  };</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">return</span> it;</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  }</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> EventType></div><div class="line"><a name="l00118"></a><span class="lineno"><a class="line" href="class_open_g_p_1_1_event_provider.html#a88ecc1ad94b2a374ee6de0899b804cd7"> 118</a></span>  <span class="keywordtype">void</span> <a class="code" href="class_open_g_p_1_1_event_provider.html#a88ecc1ad94b2a374ee6de0899b804cd7">remove_listener</a>(<span class="keyword">const</span> <a class="code" href="class_open_g_p_1_1_event_provider.html#a90903f76a739ba039fe88d1bff49c652">ListenerHandle</a> &handle) {</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keyword">auto</span> idx = std::type_index(<span class="keyword">typeid</span>(EventType));</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  listeners[idx].erase(handle);</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  }</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> };</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment">//=============================================================================</span></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> } <span class="comment">// OpenGP::</span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment">//=============================================================================</span></div><div class="ttc" id="class_open_g_p_1_1_event_provider_html_afe8095ab1acf0e868a960cf896cb96e4"><div class="ttname"><a href="class_open_g_p_1_1_event_provider.html#afe8095ab1acf0e868a960cf896cb96e4">OpenGP::EventProvider::add_listener</a></div><div class="ttdeci">ListenerHandle add_listener(ListenerType listener, const EventSentinel &sentinel)</div><div class="ttdoc">Register a listener to be called for events of EventType </div><div class="ttdef"><b>Definition:</b> EventProvider.h:86</div></div>
<div class="ttc" id="class_open_g_p_1_1_event_provider_html_a90903f76a739ba039fe88d1bff49c652"><div class="ttname"><a href="class_open_g_p_1_1_event_provider.html#a90903f76a739ba039fe88d1bff49c652">OpenGP::EventProvider::ListenerHandle</a></div><div class="ttdeci">decltype(listeners)::mapped_type::iterator ListenerHandle</div><div class="ttdoc">A handle that can be use to deregister a particular listener. </div><div class="ttdef"><b>Definition:</b> EventProvider.h:76</div></div>
<div class="ttc" id="class_open_g_p_1_1_event_provider_html_a88ecc1ad94b2a374ee6de0899b804cd7"><div class="ttname"><a href="class_open_g_p_1_1_event_provider.html#a88ecc1ad94b2a374ee6de0899b804cd7">OpenGP::EventProvider::remove_listener</a></div><div class="ttdeci">void remove_listener(const ListenerHandle &handle)</div><div class="ttdoc">Manually deregister a particular listener. </div><div class="ttdef"><b>Definition:</b> EventProvider.h:118</div></div>
<div class="ttc" id="class_open_g_p_1_1_event_provider_html_a2182fa1f9ca09ada8b0079d793dca96b"><div class="ttname"><a href="class_open_g_p_1_1_event_provider.html#a2182fa1f9ca09ada8b0079d793dca96b">OpenGP::EventProvider::add_listener</a></div><div class="ttdeci">ListenerHandle add_listener(ListenerType listener)</div><div class="ttdoc">Register a listener to be called for events of EventType </div><div class="ttdef"><b>Definition:</b> EventProvider.h:80</div></div>
<div class="ttc" id="class_open_g_p_1_1_event_provider_html_a7fac2a2652ccbfeb05c67f7c8c95695b"><div class="ttname"><a href="class_open_g_p_1_1_event_provider.html#a7fac2a2652ccbfeb05c67f7c8c95695b">OpenGP::EventProvider::send_event</a></div><div class="ttdeci">void send_event(const EventType &event)</div><div class="ttdoc">A derived class can call this method to broadcast an event to all of its registered listeners...</div><div class="ttdef"><b>Definition:</b> EventProvider.h:63</div></div>
<div class="ttc" id="namespace_open_g_p_html"><div class="ttname"><a href="namespace_open_g_p.html">OpenGP</a></div><div class="ttdef"><b>Definition:</b> VirtualDepthSensor.h:19</div></div>
<div class="ttc" id="class_open_g_p_1_1_event_sentinel_html"><div class="ttname"><a href="class_open_g_p_1_1_event_sentinel.html">OpenGP::EventSentinel</a></div><div class="ttdoc">Object that allows callbacks to be automatically deregistered if the objects they reference are destr...</div><div class="ttdef"><b>Definition:</b> EventProvider.h:22</div></div>
<div class="ttc" id="class_open_g_p_1_1_event_sentinel_html_ac28d3f5469f37a0cb5bcbbdb78c406b2"><div class="ttname"><a href="class_open_g_p_1_1_event_sentinel.html#ac28d3f5469f37a0cb5bcbbdb78c406b2">OpenGP::EventSentinel::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdoc">Allow all guarded callbacks to be destroyed, as if the sentinel had died. </div><div class="ttdef"><b>Definition:</b> EventProvider.h:43</div></div>
<div class="ttc" id="class_open_g_p_1_1_event_provider_html"><div class="ttname"><a href="class_open_g_p_1_1_event_provider.html">OpenGP::EventProvider</a></div><div class="ttdoc">Base class that provides derived classes the abillity to register callbacks and send events...</div><div class="ttdef"><b>Definition:</b> EventProvider.h:51</div></div>
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