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<a href="catch__event_8cpp.html">浏览该文件的文档.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// Copyright 2021 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 Make, CatchEvent, ComponentDecorator</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 Component, 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> </div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceftxui.html">ftxui</a> {</div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> </div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="keyword">class </span>CatchEventBase : <span class="keyword">public</span> ComponentBase {</div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> <span class="keyword">public</span>:</div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> <span class="comment">// 构造函数。</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">explicit</span> CatchEventBase(std::function&lt;<span class="keywordtype">bool</span>(Event)&gt; on_event)</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> : on_event_(std::move(on_event)) {}</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="comment">// 组件实现。</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> <span class="keywordtype">bool</span> OnEvent(Event event)<span class="keyword"> override </span>{</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> <span class="keywordflow">if</span> (on_event_(event)) {</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> <span class="keywordflow">return</span> <a class="code hl_function" href="group__component.html#ab84629a8fecad2e1cdd426b7ddc72277">ComponentBase::OnEvent</a>(event);</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> </div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">protected</span>:</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> std::function&lt;bool(Event)&gt; on_event_;</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span>};</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="comment"></span> </div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="comment">/// @brief 返回一个组件,使用|on_event|捕获事件。当事件已被处理时此函数必须返回true否则返回false。</span></div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="comment">/// @param child 包装的组件。</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="comment">/// @param on_event 绘制界面的函数。</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="comment">/// @ingroup component</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">/// ### 示例</span></div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span><span class="comment">///</span></div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="comment">/// ```cpp</span></div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span><span class="comment">/// auto screen = ScreenInteractive::TerminalOutput();</span></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span><span class="comment">/// auto renderer = Renderer([] {</span></div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span><span class="comment">/// return text(&quot;My interface&quot;);</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span><span class="comment">/// });</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span><span class="comment">/// auto component = CatchEvent(renderer, [&amp;](Event event) {</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span><span class="comment">/// if (event == Event::Character(&#39;q&#39;)) {</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="comment">/// screen.ExitLoopClosure()();</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span><span class="comment">/// return true;</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span><span class="comment">/// }</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><span class="comment">/// return false;</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span><span class="comment">/// });</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span><span class="comment">/// screen.Loop(component);</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span><span class="comment">/// ```</span></div>
<div class="foldopen" id="foldopen00053" data-start="{" data-end="}">
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"><a class="line" href="group__component.html#ga0bfd67a2815807dc6fc9bc0f79bce29e"> 53</a></span><span class="comment"></span><a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> <a class="code hl_function" href="namespaceftxui.html#afa5872ba3f9889c7487e57e745e56857">CatchEvent</a>(<a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> child,</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> std::function&lt;<span class="keywordtype">bool</span>(<a class="code hl_struct" href="group__component.html#structftxui_1_1Event">Event</a> event)&gt; on_event) {</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">auto</span> out = <a class="code hl_function" href="namespaceftxui.html#a2b8973dc71334f1d98e2e6f55de8b5ae">Make&lt;CatchEventBase&gt;</a>(std::move(on_event));</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> out-&gt;Add(std::move(child));</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="keywordflow">return</span> out;</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span>}</div>
</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span><span class="comment"></span> </div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span><span class="comment">/// @brief 装饰一个组件,使用|on_event|捕获事件。当事件已被处理时此函数必须返回true否则返回false。</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span><span class="comment">/// @param on_event 绘制界面的函数。</span></div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span><span class="comment">/// @ingroup component</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span><span class="comment">///</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span><span class="comment">/// ### 示例</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span><span class="comment">///</span></div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span><span class="comment">/// ```cpp</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span><span class="comment">/// auto screen = ScreenInteractive::TerminalOutput();</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span><span class="comment">/// auto renderer = Renderer([] { return text(&quot;Hello world&quot;); });</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span><span class="comment">/// renderer |= CatchEvent([&amp;](Event event) {</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span><span class="comment">/// if (event == Event::Character(&#39;q&#39;)) {</span></div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span><span class="comment">/// screen.ExitLoopClosure()();</span></div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span><span class="comment">/// return true;</span></div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span><span class="comment">/// }</span></div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span><span class="comment">/// return false;</span></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span><span class="comment">/// });</span></div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span><span class="comment">/// screen.Loop(renderer);</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span><span class="comment">/// ```</span></div>
<div class="foldopen" id="foldopen00078" data-start="{" data-end="}">
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"><a class="line" href="group__component.html#gad2948235799c010c76c6de861c050c59"> 78</a></span><span class="comment"></span><a class="code hl_typedef" href="namespaceftxui.html#af07b496fe512e3a4863ee546f19e9a6c">ComponentDecorator</a> <a class="code hl_function" href="namespaceftxui.html#afa5872ba3f9889c7487e57e745e56857">CatchEvent</a>(std::function&lt;<span class="keywordtype">bool</span>(<a class="code hl_struct" href="group__component.html#structftxui_1_1Event">Event</a>)&gt; on_event) {</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="keywordflow">return</span> [on_event = std::move(on_event)](<a class="code hl_typedef" href="namespaceftxui.html#af1479ede01dbf087342534ab4ada11d3">Component</a> child) {</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="keywordflow">return</span> <a class="code hl_function" href="namespaceftxui.html#afa5872ba3f9889c7487e57e745e56857">CatchEvent</a>(std::move(child), [on_event = on_event](<a class="code hl_struct" href="group__component.html#structftxui_1_1Event">Event</a> event) {</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> <span class="keywordflow">return</span> on_event(std::move(event));</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> });</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> };</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span>}</div>
</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> </div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span>} <span class="comment">// namespace ftxui</span></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="aevent_8hpp_html"><div class="ttname"><a href="event_8hpp.html">event.hpp</a></div></div>
<div class="ttc" id="agroup__component_html_ab84629a8fecad2e1cdd426b7ddc72277"><div class="ttname"><a href="group__component.html#ab84629a8fecad2e1cdd426b7ddc72277">ftxui::ComponentBase::OnEvent</a></div><div class="ttdeci">virtual bool OnEvent(Event)</div><div class="ttdoc">响应事件时调用。</div><div class="ttdef"><b>定义</b> <a href="component_8cpp_source.html#l00151">component.cpp:151</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">代表一个事件。它可以是按键事件、终端大小调整等等...</div><div class="ttdef"><b>定义</b> <a href="event_8hpp_source.html#l00028">event.hpp:28</a></div></div>
<div class="ttc" id="anamespaceftxui_html"><div class="ttname"><a href="namespaceftxui.html">ftxui</a></div><div class="ttdoc">#include &quot;ftxui/component/component_base.hpp&quot; // 用于 ComponentBase</div><div class="ttdef"><b>定义</b> <a href="animation_8hpp_source.html#l00009">animation.hpp:9</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>定义</b> <a href="component_8hpp_source.html#l00027">component.hpp:27</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>定义</b> <a href="component_8hpp_source.html#l00032">component.hpp:32</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>定义</b> <a href="component__base_8hpp_source.html#l00023">component_base.hpp:23</a></div></div>
<div class="ttc" id="anamespaceftxui_html_afa5872ba3f9889c7487e57e745e56857"><div class="ttname"><a href="namespaceftxui.html#afa5872ba3f9889c7487e57e745e56857">ftxui::CatchEvent</a></div><div class="ttdeci">Component CatchEvent(Component child, std::function&lt; bool(Event)&gt;)</div></div>
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