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<div class="headertitle"><div class="title">hoverable.cpp</div></div>
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<a href="hoverable_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// Copyright 2022 Arthur Sonzogni. All rights reserved.</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// Use of this source code is governed by the MIT license that can be found in</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">// the LICENSE file.</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include &lt;functional&gt;</span> <span class="comment">// for function</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="preprocessor">#include &lt;utility&gt;</span> <span class="comment">// for move</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#include &quot;<a class="code" href="component_8hpp.html">ftxui/component/component.hpp</a>&quot;</span> <span class="comment">// for ComponentDecorator, Hoverable, Make</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include &quot;<a class="code" href="component__base_8hpp.html">ftxui/component/component_base.hpp</a>&quot;</span> <span class="comment">// for ComponentBase</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include &quot;<a class="code" href="event_8hpp.html">ftxui/component/event.hpp</a>&quot;</span> <span class="comment">// for Event</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#include &quot;<a class="code" href="mouse_8hpp.html">ftxui/component/mouse.hpp</a>&quot;</span> <span class="comment">// for Mouse</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include &quot;<a class="code" href="screen__interactive_8hpp.html">ftxui/component/screen_interactive.hpp</a>&quot;</span> <span class="comment">// for Component, ScreenInteractive</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include &quot;<a class="code" href="elements_8hpp.html">ftxui/dom/elements.hpp</a>&quot;</span> <span class="comment">// for operator|, reflect, Element</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include &quot;<a class="code" href="box_8hpp.html">ftxui/screen/box.hpp</a>&quot;</span> <span class="comment">// for Box</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceftxui.html">ftxui</a> {</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="keyword">namespace </span>{</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> </div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="keywordtype">void</span> Post(std::function&lt;<span class="keywordtype">void</span>()&gt; f) {</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> <span class="keywordflow">if</span> (<span class="keyword">auto</span>* screen = <a class="code hl_function" href="group__component.html#a9dc30615370889030396a239ceee2a77">ScreenInteractive::Active</a>()) {</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> screen-&gt;Post(std::move(f));</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> }</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> f();</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span>}</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span>} <span class="comment">// namespace</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="comment"></span> </div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="comment">/// @brief Wrap a component. Gives the ability to know if it is hovered by the</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="comment">/// mouse.</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="comment">/// @param component The wrapped component.</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="comment">/// @param hover The value to reflect whether the component is hovered or not.</span></div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="comment">/// @ingroup component</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="comment">///</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="comment">/// ### Example</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="comment">///</span></div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span><span class="comment">/// ```cpp</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span><span class="comment">/// auto button = Button(&quot;exit&quot;, screen.ExitLoopClosure());</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="comment">/// bool hover = false;</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span><span class="comment">/// auto button_hover = Hoverable(button, &amp;hover);</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span><span class="comment">/// ```</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span><span class="comment"></span><span class="comment">// NOLINTNEXTLINE</span></div>
<div class="foldopen" id="foldopen00043" data-start="{" data-end="}">
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"><a class="line" href="group__component.html#ga562d984d3830d63285643565cd55d16f"> 43</a></span><a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> <a class="code hl_function" href="group__component.html#ga562d984d3830d63285643565cd55d16f">Hoverable</a>(<a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> component, <span class="keywordtype">bool</span>* hover) {</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="keyword">class </span>Impl : <span class="keyword">public</span> <a class="code hl_class" href="group__component.html#classftxui_1_1ComponentBase">ComponentBase</a> {</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keyword">public</span>:</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> Impl(<a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> component, <span class="keywordtype">bool</span>* hover)</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> : component_(std::move(component)), hover_(hover) {</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> Add(component_);</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> }</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> </div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keyword">private</span>:</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <a class="code hl_typedef" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">Element</a> OnRender()<span class="keyword"> override </span>{</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keywordflow">return</span> ComponentBase::OnRender() | reflect(box_);</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> }</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> </div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keywordtype">bool</span> OnEvent(<a class="code hl_struct" href="group__component.html#structftxui_1_1Event">Event</a> event)<span class="keyword"> override </span>{</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="keywordflow">if</span> (event.<a class="code hl_function" href="group__component.html#a2c835925299d56941ffd2e2421f0fd13">is_mouse</a>()) {</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> *hover_ = box_.Contain(event.<a class="code hl_variable" href="group__component.html#a761c3b7a78d8408dfbe76131209532d7">mouse</a>().<a class="code hl_variable" href="group__component.html#a6150e0515f7202e2fb518f7206ed97dc">x</a>, event.<a class="code hl_variable" href="group__component.html#a761c3b7a78d8408dfbe76131209532d7">mouse</a>().<a class="code hl_variable" href="group__component.html#a0a2f84ed7838f07779ae24c5a9086d33">y</a>) &amp;&amp;</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> CaptureMouse(event);</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> }</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> </div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <span class="keywordflow">return</span> ComponentBase::OnEvent(event);</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> }</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> </div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> component_;</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordtype">bool</span>* hover_;</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <a class="code hl_struct" href="group__screen.html#structftxui_1_1Box">Box</a> box_;</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> };</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> </div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespaceftxui.html#a2b8973dc71334f1d98e2e6f55de8b5ae">Make&lt;Impl&gt;</a>(component, hover);</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span>}</div>
</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span><span class="comment"></span> </div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span><span class="comment">/// @brief Wrap a component. Uses callbacks.</span></div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span><span class="comment">/// @param component The wrapped component.</span></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span><span class="comment">/// @param on_enter Callback OnEnter</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span><span class="comment">/// @param on_leave Callback OnLeave</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span><span class="comment">/// @ingroup component</span></div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span><span class="comment">///</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span><span class="comment">/// ### Example</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span><span class="comment">///</span></div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span><span class="comment">/// ```cpp</span></div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span><span class="comment">/// auto button = Button(&quot;exit&quot;, screen.ExitLoopClosure());</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span><span class="comment">/// bool hover = false;</span></div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span><span class="comment">/// auto button_hover = Hoverable(button, &amp;hover);</span></div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span><span class="comment">/// ```</span></div>
<div class="foldopen" id="foldopen00086" data-start="{" data-end="}">
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"><a class="line" href="group__component.html#ga92ec2f5ccb509da2e2c24ae6a1f6b12b"> 86</a></span><span class="comment"></span><a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> <a class="code hl_function" href="group__component.html#ga562d984d3830d63285643565cd55d16f">Hoverable</a>(<a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> component,</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> std::function&lt;<span class="keywordtype">void</span>()&gt; on_enter,</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> std::function&lt;<span class="keywordtype">void</span>()&gt; on_leave) {</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">class </span>Impl : <span class="keyword">public</span> <a class="code hl_class" href="group__component.html#classftxui_1_1ComponentBase">ComponentBase</a> {</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> <span class="keyword">public</span>:</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> Impl(<a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> component,</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> std::function&lt;<span class="keywordtype">void</span>()&gt; on_enter,</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> std::function&lt;<span class="keywordtype">void</span>()&gt; on_leave)</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> : component_(std::move(component)),</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> on_enter_(std::move(on_enter)),</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> on_leave_(std::move(on_leave)) {</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> Add(component_);</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> }</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> </div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> <span class="keyword">private</span>:</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> <a class="code hl_typedef" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">Element</a> OnRender()<span class="keyword"> override </span>{</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="keywordflow">return</span> ComponentBase::OnRender() | reflect(box_);</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> }</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> </div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> <span class="keywordtype">bool</span> OnEvent(<a class="code hl_struct" href="group__component.html#structftxui_1_1Event">Event</a> event)<span class="keyword"> override </span>{</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <span class="keywordflow">if</span> (event.<a class="code hl_function" href="group__component.html#a2c835925299d56941ffd2e2421f0fd13">is_mouse</a>()) {</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> hover = box_.Contain(event.<a class="code hl_variable" href="group__component.html#a761c3b7a78d8408dfbe76131209532d7">mouse</a>().<a class="code hl_variable" href="group__component.html#a6150e0515f7202e2fb518f7206ed97dc">x</a>, event.<a class="code hl_variable" href="group__component.html#a761c3b7a78d8408dfbe76131209532d7">mouse</a>().<a class="code hl_variable" href="group__component.html#a0a2f84ed7838f07779ae24c5a9086d33">y</a>) &amp;&amp;</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> CaptureMouse(event);</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="keywordflow">if</span> (hover != hover_) {</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> Post(hover ? on_enter_ : on_leave_);</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> }</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> hover_ = hover;</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> }</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> </div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> <span class="keywordflow">return</span> ComponentBase::OnEvent(event);</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> }</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> </div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> component_;</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> <a class="code hl_struct" href="group__screen.html#structftxui_1_1Box">Box</a> box_;</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <span class="keywordtype">bool</span> hover_ = <span class="keyword">false</span>;</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> std::function&lt;void()&gt; on_enter_;</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> std::function&lt;void()&gt; on_leave_;</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> };</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> </div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespaceftxui.html#a2b8973dc71334f1d98e2e6f55de8b5ae">Make&lt;Impl&gt;</a>(std::move(component), std::move(on_enter),</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> std::move(on_leave));</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span>}</div>
</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span><span class="comment"></span> </div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span><span class="comment">/// @brief Wrap a component. Gives the ability to know if it is hovered by the</span></div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span><span class="comment">/// mouse.</span></div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span><span class="comment">/// @param hover The value to reflect whether the component is hovered or not.</span></div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span><span class="comment">/// @ingroup component</span></div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span><span class="comment">///</span></div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span><span class="comment">/// ### Example</span></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span><span class="comment">///</span></div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span><span class="comment">/// ```cpp</span></div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span><span class="comment">/// bool hover = false;</span></div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span><span class="comment">/// auto button = Button(&quot;exit&quot;, screen.ExitLoopClosure());</span></div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span><span class="comment">/// button |= Hoverable(&amp;hover);</span></div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span><span class="comment">/// ```</span></div>
<div class="foldopen" id="foldopen00141" data-start="{" data-end="}">
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"><a class="line" href="group__component.html#ga9d94b37352be13d3551a9d5785f75439"> 141</a></span><span class="comment"></span><a class="code hl_typedef" href="namespaceftxui.html#af07b496fe512e3a4863ee546f19e9a6c">ComponentDecorator</a> <a class="code hl_function" href="group__component.html#ga562d984d3830d63285643565cd55d16f">Hoverable</a>(<span class="keywordtype">bool</span>* hover) {</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> <span class="keywordflow">return</span> [hover](<a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> component) {</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <span class="keywordflow">return</span> <a class="code hl_function" href="group__component.html#ga562d984d3830d63285643565cd55d16f">Hoverable</a>(std::move(component), hover);</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> };</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span>}</div>
</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span><span class="comment"></span> </div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span><span class="comment">/// @brief Wrap a component. Gives the ability to know if it is hovered by the</span></div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span><span class="comment">/// mouse.</span></div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span><span class="comment">/// @param on_enter is called when the mouse hover the component.</span></div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span><span class="comment">/// @param on_leave is called when the mouse leave the component.</span></div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span><span class="comment">/// @ingroup component</span></div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span><span class="comment">///</span></div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span><span class="comment">/// ### Example</span></div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span><span class="comment">///</span></div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span><span class="comment">/// ```cpp</span></div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span><span class="comment">/// auto button = Button(&quot;exit&quot;, screen.ExitLoopClosure());</span></div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span><span class="comment">/// int on_enter_cnt = 0;</span></div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span><span class="comment">/// int on_leave_cnt = 0;</span></div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span><span class="comment">/// button |= Hoverable(</span></div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span><span class="comment">/// [&amp;]{ on_enter_cnt++; },</span></div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span><span class="comment">/// [&amp;]{ on_leave_cnt++; }</span></div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span><span class="comment">/// );</span></div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span><span class="comment">/// ```</span></div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span><span class="comment"></span><span class="comment">// NOLINTNEXTLINE</span></div>
<div class="foldopen" id="foldopen00165" data-start="{" data-end="}">
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"><a class="line" href="group__component.html#ga34adfc9c76cf3603156cba32ad5d7142"> 165</a></span><a class="code hl_typedef" href="namespaceftxui.html#af07b496fe512e3a4863ee546f19e9a6c">ComponentDecorator</a> <a class="code hl_function" href="group__component.html#ga562d984d3830d63285643565cd55d16f">Hoverable</a>(std::function&lt;<span class="keywordtype">void</span>()&gt; on_enter,</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> <span class="comment">// NOLINTNEXTLINE</span></div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> std::function&lt;<span class="keywordtype">void</span>()&gt; on_leave) {</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> <span class="keywordflow">return</span> [on_enter, on_leave](<a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> component) {</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> <span class="keywordflow">return</span> <a class="code hl_function" href="group__component.html#ga562d984d3830d63285643565cd55d16f">Hoverable</a>(std::move(component), on_enter, on_leave);</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> };</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span>}</div>
</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span><span class="comment"></span> </div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span><span class="comment">/// @brief Wrap a component. Gives the ability to know if it is hovered by the</span></div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span><span class="comment">/// mouse.</span></div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span><span class="comment">/// @param component the wrapped component.</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span><span class="comment">/// @param on_change is called when the mouse enter or leave the component.</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span><span class="comment">/// @ingroup component</span></div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span><span class="comment">///</span></div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span><span class="comment">/// ### Example</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span><span class="comment">///</span></div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span><span class="comment">/// ```cpp</span></div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span><span class="comment">/// auto button = Button(&quot;exit&quot;, screen.ExitLoopClosure());</span></div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span><span class="comment">/// bool hovered = false;</span></div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span><span class="comment">/// auto button_hoverable = Hoverable(button,</span></div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span><span class="comment">/// [&amp;](bool hover) { hovered = hover;});</span></div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span><span class="comment">/// ```</span></div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span><span class="comment"></span><span class="comment">// NOLINTNEXTLINE</span></div>
<div class="foldopen" id="foldopen00188" data-start="{" data-end="}">
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"><a class="line" href="group__component.html#ga91cac81077c483efdb952268aee9a523"> 188</a></span><a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> <a class="code hl_function" href="group__component.html#ga562d984d3830d63285643565cd55d16f">Hoverable</a>(<a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> component, std::function&lt;<span class="keywordtype">void</span>(<span class="keywordtype">bool</span>)&gt; on_change) {</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> <span class="keywordflow">return</span> <a class="code hl_function" href="group__component.html#ga562d984d3830d63285643565cd55d16f">Hoverable</a>(</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> std::move(component), <span class="comment">//</span></div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> [on_change] { on_change(<span class="keyword">true</span>); }, <span class="comment">//</span></div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> [on_change] { on_change(<span class="keyword">false</span>); } <span class="comment">//</span></div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span> );</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span>}</div>
</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span><span class="comment"></span> </div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span><span class="comment">/// @brief Wrap a component. Gives the ability to know if it is hovered by the</span></div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span><span class="comment">/// mouse.</span></div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span><span class="comment">/// @param on_change is called when the mouse enter or leave the component.</span></div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span><span class="comment">/// @ingroup component</span></div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span><span class="comment">///</span></div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span><span class="comment">/// ### Example</span></div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span><span class="comment">///</span></div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span><span class="comment">/// ```cpp</span></div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span><span class="comment">/// auto button = Button(&quot;exit&quot;, screen.ExitLoopClosure());</span></div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span><span class="comment">/// bool hovered = false;</span></div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span><span class="comment">/// button |= Hoverable([&amp;](bool hover) { hovered = hover;});</span></div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span><span class="comment">/// ```</span></div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span><span class="comment"></span><span class="comment">// NOLINTNEXTLINE</span></div>
<div class="foldopen" id="foldopen00209" data-start="{" data-end="}">
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"><a class="line" href="group__component.html#gafd7cbaef5378a907111a64ee69aed56a"> 209</a></span><a class="code hl_typedef" href="namespaceftxui.html#af07b496fe512e3a4863ee546f19e9a6c">ComponentDecorator</a> <a class="code hl_function" href="group__component.html#ga562d984d3830d63285643565cd55d16f">Hoverable</a>(std::function&lt;<span class="keywordtype">void</span>(<span class="keywordtype">bool</span>)&gt; on_change) {</div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span> <span class="keywordflow">return</span> [on_change](<a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> component) {</div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span> <span class="keywordflow">return</span> <a class="code hl_function" href="group__component.html#ga562d984d3830d63285643565cd55d16f">Hoverable</a>(std::move(component), on_change);</div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span> };</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span>}</div>
</div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> </div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span>} <span class="comment">// namespace ftxui</span></div>
<div class="ttc" id="abox_8hpp_html"><div class="ttname"><a href="box_8hpp.html">box.hpp</a></div></div>
<div class="ttc" id="acomponent_8hpp_html"><div class="ttname"><a href="component_8hpp.html">component.hpp</a></div></div>
<div class="ttc" id="acomponent__base_8hpp_html"><div class="ttname"><a href="component__base_8hpp.html">component_base.hpp</a></div></div>
<div class="ttc" id="aelements_8hpp_html"><div class="ttname"><a href="elements_8hpp.html">elements.hpp</a></div></div>
<div class="ttc" id="aevent_8hpp_html"><div class="ttname"><a href="event_8hpp.html">event.hpp</a></div></div>
<div class="ttc" id="agroup__component_html_a0a2f84ed7838f07779ae24c5a9086d33"><div class="ttname"><a href="group__component.html#a0a2f84ed7838f07779ae24c5a9086d33">ftxui::Mouse::y</a></div><div class="ttdeci">int y</div><div class="ttdef"><b>Definition</b> <a href="mouse_8hpp_source.html#l00042">mouse.hpp:42</a></div></div>
<div class="ttc" id="agroup__component_html_a2c835925299d56941ffd2e2421f0fd13"><div class="ttname"><a href="group__component.html#a2c835925299d56941ffd2e2421f0fd13">ftxui::Event::is_mouse</a></div><div class="ttdeci">bool is_mouse() const</div><div class="ttdef"><b>Definition</b> <a href="event_8hpp_source.html#l00109">event.hpp:109</a></div></div>
<div class="ttc" id="agroup__component_html_a6150e0515f7202e2fb518f7206ed97dc"><div class="ttname"><a href="group__component.html#a6150e0515f7202e2fb518f7206ed97dc">ftxui::Mouse::x</a></div><div class="ttdeci">int x</div><div class="ttdef"><b>Definition</b> <a href="mouse_8hpp_source.html#l00041">mouse.hpp:41</a></div></div>
<div class="ttc" id="agroup__component_html_a761c3b7a78d8408dfbe76131209532d7"><div class="ttname"><a href="group__component.html#a761c3b7a78d8408dfbe76131209532d7">ftxui::Event::mouse</a></div><div class="ttdeci">struct Mouse mouse</div><div class="ttdef"><b>Definition</b> <a href="event_8hpp_source.html#l00144">event.hpp:144</a></div></div>
<div class="ttc" id="agroup__component_html_a9dc30615370889030396a239ceee2a77"><div class="ttname"><a href="group__component.html#a9dc30615370889030396a239ceee2a77">ftxui::ScreenInteractive::Active</a></div><div class="ttdeci">static ScreenInteractive * Active()</div><div class="ttdoc">Return the currently active screen, or null if none.</div><div class="ttdef"><b>Definition</b> <a href="screen__interactive_8cpp_source.html#l00593">screen_interactive.cpp:593</a></div></div>
<div class="ttc" id="agroup__component_html_classftxui_1_1ComponentBase"><div class="ttname"><a href="group__component.html#classftxui_1_1ComponentBase">ftxui::ComponentBase</a></div><div class="ttdoc">It implement rendering itself as ftxui::Element. It implement keyboard navigation by responding to ft...</div><div class="ttdef"><b>Definition</b> <a href="component__base_8hpp_source.html#l00030">component_base.hpp:30</a></div></div>
<div class="ttc" id="agroup__component_html_ga562d984d3830d63285643565cd55d16f"><div class="ttname"><a href="group__component.html#ga562d984d3830d63285643565cd55d16f">ftxui::Hoverable</a></div><div class="ttdeci">Component Hoverable(Component component, bool *hover)</div><div class="ttdoc">Wrap a component. Gives the ability to know if it is hovered by the mouse.</div><div class="ttdef"><b>Definition</b> <a href="#l00043">hoverable.cpp:43</a></div></div>
<div class="ttc" id="agroup__component_html_structftxui_1_1Event"><div class="ttname"><a href="group__component.html#structftxui_1_1Event">ftxui::Event</a></div><div class="ttdoc">Represent an event. It can be key press event, a terminal resize, or more ...</div><div class="ttdef"><b>Definition</b> <a href="event_8hpp_source.html#l00029">event.hpp:29</a></div></div>
<div class="ttc" id="agroup__screen_html_structftxui_1_1Box"><div class="ttname"><a href="group__screen.html#structftxui_1_1Box">ftxui::Box</a></div><div class="ttdoc">Box is a structure that represents a rectangular area in a 2D space.</div><div class="ttdef"><b>Definition</b> <a href="box_8hpp_source.html#l00016">box.hpp:16</a></div></div>
<div class="ttc" id="amouse_8hpp_html"><div class="ttname"><a href="mouse_8hpp.html">mouse.hpp</a></div></div>
<div class="ttc" id="anamespaceftxui_html"><div class="ttname"><a href="namespaceftxui.html">ftxui</a></div><div class="ttdoc">The FTXUI ftxui:: namespace.</div><div class="ttdef"><b>Definition</b> <a href="animation_8hpp_source.html#l00010">animation.hpp:10</a></div></div>
<div class="ttc" id="anamespaceftxui_html_a2b8973dc71334f1d98e2e6f55de8b5ae"><div class="ttname"><a href="namespaceftxui.html#a2b8973dc71334f1d98e2e6f55de8b5ae">ftxui::Make</a></div><div class="ttdeci">std::shared_ptr&lt; T &gt; Make(Args &amp;&amp;... args)</div><div class="ttdef"><b>Definition</b> <a href="component_8hpp_source.html#l00026">component.hpp:26</a></div></div>
<div class="ttc" id="anamespaceftxui_html_a2bc31f2d685189e5c61d2293a1f51b4f"><div class="ttname"><a href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">ftxui::Element</a></div><div class="ttdeci">std::shared_ptr&lt; Node &gt; Element</div><div class="ttdef"><b>Definition</b> <a href="elements_8hpp_source.html#l00022">elements.hpp:22</a></div></div>
<div class="ttc" id="anamespaceftxui_html_af07b496fe512e3a4863ee546f19e9a6c"><div class="ttname"><a href="namespaceftxui.html#af07b496fe512e3a4863ee546f19e9a6c">ftxui::ComponentDecorator</a></div><div class="ttdeci">std::function&lt; Component(Component)&gt; ComponentDecorator</div><div class="ttdef"><b>Definition</b> <a href="component_8hpp_source.html#l00031">component.hpp:31</a></div></div>
<div class="ttc" id="anamespaceftxui_html_af1479ede01dbf087342534ab4ada11d3"><div class="ttname"><a href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">ftxui::Component</a></div><div class="ttdeci">std::shared_ptr&lt; ComponentBase &gt; Component</div><div class="ttdef"><b>Definition</b> <a href="component__base_8hpp_source.html#l00024">component_base.hpp:24</a></div></div>
<div class="ttc" id="ascreen__interactive_8hpp_html"><div class="ttname"><a href="screen__interactive_8hpp.html">screen_interactive.hpp</a></div></div>
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