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<h1><a class="anchor" id="autotoc_md194"></a>
nested_screen</h1>
<div class="fragment"><div class="line"><span class="comment">// Copyright 2020 Arthur Sonzogni. All rights reserved.</span></div>
<div class="line"><span class="comment">// Use of this source code is governed by the MIT license that can be found in</span></div>
<div class="line"><span class="comment">// the LICENSE file.</span></div>
<div class="line"><span class="preprocessor">#include &lt;memory&gt;</span> <span class="comment">// for allocator, shared_ptr, __shared_ptr_access</span></div>
<div class="line"><span class="preprocessor">#include &lt;string&gt;</span> <span class="comment">// for operator+, string, char_traits, basic_string</span></div>
<div class="line"> </div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="captured__mouse_8hpp.html">ftxui/component/captured_mouse.hpp</a>&quot;</span> <span class="comment">// for ftxui</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="component_8hpp.html">ftxui/component/component.hpp</a>&quot;</span> <span class="comment">// for Button, Vertical, Renderer</span></div>
<div class="line"><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"><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 ScreenInteractive</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="elements_8hpp.html">ftxui/dom/elements.hpp</a>&quot;</span> <span class="comment">// for separator, text, Element, operator|, vbox, border</span></div>
<div class="line"> </div>
<div class="line"><span class="keyword">using namespace </span><a class="code hl_namespace" href="namespaceftxui.html">ftxui</a>;</div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">void</span> <a id="a0" name="a0"></a><a class="code hl_function" href="nested__screen_8cpp.html#a77fdac0113a8c43983469efa26ce7276">Nested</a>(std::string path) {</div>
<div class="line"> <span class="keyword">auto</span> screen = ScreenInteractive::FitComponent();</div>
<div class="line"> <span class="keyword">auto</span> back_button = Button(<span class="stringliteral">&quot;Back&quot;</span>, screen.ExitLoopClosure());</div>
<div class="line"> <span class="keyword">auto</span> goto_1 = Button(<span class="stringliteral">&quot;Goto /1&quot;</span>, [path] { <a class="code hl_function" href="nested__screen_8cpp.html#a77fdac0113a8c43983469efa26ce7276">Nested</a>(path + <span class="stringliteral">&quot;/1&quot;</span>); });</div>
<div class="line"> <span class="keyword">auto</span> goto_2 = Button(<span class="stringliteral">&quot;Goto /2&quot;</span>, [path] { <a class="code hl_function" href="nested__screen_8cpp.html#a77fdac0113a8c43983469efa26ce7276">Nested</a>(path + <span class="stringliteral">&quot;/2&quot;</span>); });</div>
<div class="line"> <span class="keyword">auto</span> goto_3 = Button(<span class="stringliteral">&quot;Goto /3&quot;</span>, [path] { <a class="code hl_function" href="nested__screen_8cpp.html#a77fdac0113a8c43983469efa26ce7276">Nested</a>(path + <span class="stringliteral">&quot;/3&quot;</span>); });</div>
<div class="line"> <span class="keyword">auto</span> layout = Container::Vertical({</div>
<div class="line"> back_button,</div>
<div class="line"> goto_1,</div>
<div class="line"> goto_2,</div>
<div class="line"> goto_3,</div>
<div class="line"> });</div>
<div class="line"> <span class="keyword">auto</span> renderer = Renderer(layout, [&amp;] {</div>
<div class="line"> <span class="keywordflow">return</span> vbox({</div>
<div class="line"> text(<span class="stringliteral">&quot;path: &quot;</span> + path),</div>
<div class="line"> separator(),</div>
<div class="line"> back_button-&gt;Render(),</div>
<div class="line"> goto_1-&gt;Render(),</div>
<div class="line"> goto_2-&gt;Render(),</div>
<div class="line"> goto_3-&gt;Render(),</div>
<div class="line"> }) |</div>
<div class="line"> border;</div>
<div class="line"> });</div>
<div class="line"> screen.Loop(renderer);</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> <a id="a1" name="a1"></a><a class="code hl_function" href="examples_2component_2button_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
<div class="line"> <span class="keyword">auto</span> screen = ScreenInteractive::FitComponent();</div>
<div class="line"> <span class="keyword">auto</span> button_quit = Button(<span class="stringliteral">&quot;Quit&quot;</span>, screen.ExitLoopClosure());</div>
<div class="line"> <span class="keyword">auto</span> button_nested = Button(<span class="stringliteral">&quot;Nested&quot;</span>, [] { <a class="code hl_function" href="nested__screen_8cpp.html#a77fdac0113a8c43983469efa26ce7276">Nested</a>(<span class="stringliteral">&quot;&quot;</span>); });</div>
<div class="line"> screen.Loop(Container::Vertical({</div>
<div class="line"> button_quit,</div>
<div class="line"> button_nested,</div>
<div class="line"> }));</div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="ttc" id="acaptured__mouse_8hpp_html"><div class="ttname"><a href="captured__mouse_8hpp.html">captured_mouse.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="aexamples_2component_2button_8cpp_html_ae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="examples_2component_2button_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a></div><div class="ttdeci">int main()</div><div class="ttdef"><b>Definition</b> <a href="examples_2component_2button_8cpp_source.html#l00004">examples/component/button.cpp:4</a></div></div>
<div class="ttc" id="anamespaceftxui_html"><div class="ttname"><a href="namespaceftxui.html">ftxui</a></div><div class="ttdef"><b>Definition</b> <a href="animation_8hpp_source.html#l00010">animation.hpp:10</a></div></div>
<div class="ttc" id="anested__screen_8cpp_html_a77fdac0113a8c43983469efa26ce7276"><div class="ttname"><a href="nested__screen_8cpp.html#a77fdac0113a8c43983469efa26ce7276">Nested</a></div><div class="ttdeci">void Nested(std::string path)</div><div class="ttdef"><b>Definition</b> <a href="nested__screen_8cpp_source.html#l00015">nested_screen.cpp:15</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>
</div><!-- fragment --><div class="fragment"><div class="line"><span class="comment">// Copyright 2020 Arthur Sonzogni. All rights reserved.</span></div>
<div class="line"><span class="comment">// Use of this source code is governed by the MIT license that can be found in</span></div>
<div class="line"><span class="comment">// the LICENSE file.</span></div>
<div class="line"><span class="preprocessor">#include &lt;memory&gt;</span> <span class="comment">// for allocator, shared_ptr, __shared_ptr_access</span></div>
<div class="line"><span class="preprocessor">#include &lt;string&gt;</span> <span class="comment">// for string, basic_string, char_traits, operator+</span></div>
<div class="line"><span class="preprocessor">#include &lt;vector&gt;</span> <span class="comment">// for vector</span></div>
<div class="line"> </div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="captured__mouse_8hpp.html">ftxui/component/captured_mouse.hpp</a>&quot;</span> <span class="comment">// for ftxui</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="component_8hpp.html">ftxui/component/component.hpp</a>&quot;</span> <span class="comment">// for Button, Renderer, Horizontal, Tab</span></div>
<div class="line"><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"><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 ScreenInteractive</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="elements_8hpp.html">ftxui/dom/elements.hpp</a>&quot;</span> <span class="comment">// for operator|, Element, filler, text, hbox, separator, center, vbox, bold, border, clear_under, dbox, size, GREATER_THAN, HEIGHT</span></div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> <a class="code hl_function" href="examples_2component_2button_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
<div class="line"> <span class="keyword">using namespace </span><a class="code hl_namespace" href="namespaceftxui.html">ftxui</a>;</div>
<div class="line"> <span class="keyword">auto</span> screen = ScreenInteractive::TerminalOutput();</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// There are two layers. One at depth = 0 and the modal window at depth = 1;</span></div>
<div class="line"> <span class="keywordtype">int</span> depth = 0;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// The current rating of FTXUI.</span></div>
<div class="line"> std::string rating = <span class="stringliteral">&quot;3/5 stars&quot;</span>;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// At depth=0, two buttons. One for rating FTXUI and one for quitting.</span></div>
<div class="line"> <span class="keyword">auto</span> button_rate_ftxui = Button(<span class="stringliteral">&quot;Rate FTXUI&quot;</span>, [&amp;] { depth = 1; });</div>
<div class="line"> <span class="keyword">auto</span> button_quit = Button(<span class="stringliteral">&quot;Quit&quot;</span>, screen.ExitLoopClosure());</div>
<div class="line"> </div>
<div class="line"> <span class="keyword">auto</span> depth_0_container = Container::Horizontal({</div>
<div class="line"> button_rate_ftxui,</div>
<div class="line"> button_quit,</div>
<div class="line"> });</div>
<div class="line"> <span class="keyword">auto</span> depth_0_renderer = Renderer(depth_0_container, [&amp;] {</div>
<div class="line"> <span class="keywordflow">return</span> vbox({</div>
<div class="line"> text(<span class="stringliteral">&quot;Modal dialog example&quot;</span>),</div>
<div class="line"> separator(),</div>
<div class="line"> text(<span class="stringliteral">&quot;☆☆☆ FTXUI:&quot;</span> + rating + <span class="stringliteral">&quot; ☆☆☆&quot;</span>) | bold,</div>
<div class="line"> filler(),</div>
<div class="line"> hbox({</div>
<div class="line"> button_rate_ftxui-&gt;Render(),</div>
<div class="line"> filler(),</div>
<div class="line"> button_quit-&gt;Render(),</div>
<div class="line"> }),</div>
<div class="line"> }) |</div>
<div class="line"> border | size(HEIGHT, GREATER_THAN, 18) | center;</div>
<div class="line"> });</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// At depth=1, The &quot;modal&quot; window.</span></div>
<div class="line"> std::vector&lt;std::string&gt; rating_labels = {</div>
<div class="line"> <span class="stringliteral">&quot;1/5 stars&quot;</span>, <span class="stringliteral">&quot;2/5 stars&quot;</span>, <span class="stringliteral">&quot;3/5 stars&quot;</span>, <span class="stringliteral">&quot;4/5 stars&quot;</span>, <span class="stringliteral">&quot;5/5 stars&quot;</span>,</div>
<div class="line"> };</div>
<div class="line"> <span class="keyword">auto</span> on_rating = [&amp;](std::string new_rating) {</div>
<div class="line"> rating = new_rating;</div>
<div class="line"> depth = 0;</div>
<div class="line"> };</div>
<div class="line"> <span class="keyword">auto</span> depth_1_container = Container::Horizontal({</div>
<div class="line"> Button(&amp;rating_labels[0], [&amp;] { on_rating(rating_labels[0]); }),</div>
<div class="line"> Button(&amp;rating_labels[1], [&amp;] { on_rating(rating_labels[1]); }),</div>
<div class="line"> Button(&amp;rating_labels[2], [&amp;] { on_rating(rating_labels[2]); }),</div>
<div class="line"> Button(&amp;rating_labels[3], [&amp;] { on_rating(rating_labels[3]); }),</div>
<div class="line"> Button(&amp;rating_labels[4], [&amp;] { on_rating(rating_labels[4]); }),</div>
<div class="line"> });</div>
<div class="line"> </div>
<div class="line"> <span class="keyword">auto</span> depth_1_renderer = Renderer(depth_1_container, [&amp;] {</div>
<div class="line"> <span class="keywordflow">return</span> vbox({</div>
<div class="line"> text(<span class="stringliteral">&quot;Do you like FTXUI?&quot;</span>),</div>
<div class="line"> separator(),</div>
<div class="line"> hbox(depth_1_container-&gt;Render()),</div>
<div class="line"> }) |</div>
<div class="line"> border;</div>
<div class="line"> });</div>
<div class="line"> </div>
<div class="line"> <span class="keyword">auto</span> main_container = Container::Tab(</div>
<div class="line"> {</div>
<div class="line"> depth_0_renderer,</div>
<div class="line"> depth_1_renderer,</div>
<div class="line"> },</div>
<div class="line"> &amp;depth);</div>
<div class="line"> </div>
<div class="line"> <span class="keyword">auto</span> main_renderer = Renderer(main_container, [&amp;] {</div>
<div class="line"> <a class="code hl_typedef" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">Element</a> document = depth_0_renderer-&gt;Render();</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (depth == 1) {</div>
<div class="line"> document = dbox({</div>
<div class="line"> document,</div>
<div class="line"> depth_1_renderer-&gt;Render() | clear_under | center,</div>
<div class="line"> });</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">return</span> document;</div>
<div class="line"> });</div>
<div class="line"> </div>
<div class="line"> screen.Loop(main_renderer);</div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</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>
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