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<div id="projectbrief">C++ functional terminal UI.</div>
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<div><div class="header">
<div class="headertitle"><div class="title">ftxui / screen</div></div>
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<div class="contents">
<div class="toc"><h3>Table of Contents</h3>
<ul>
<li class="level1">
<a href="#ftxuiscreen-1">ftxui::Screen</a>
</li>
<li class="level1">
<a href="#ftxuidimension">ftxui::Dimension</a>
</li>
<li class="level1">
<a href="#ftxuipixel">ftxui::Pixel</a>
</li>
<li class="level1">
<a href="#ftxuicolor">ftxui::Color</a>
</li>
</ul>
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<div class="textblock"><p><img src="https://nsm09.casimages.com/img/2025/05/31//2505310207423242518595348.png" alt="title-img" class="inline"/></p>
<p><code>ftxui::screen</code> モジュールは低レベルの基盤です。単独で使用することもできますが、 主に <a href="module-dom.html">ftxui::dom</a> および <a href="module-component.html">ftxui::component</a> モジュールと組み合わせて使用するように設計されています。</p>
<p>それは <a class="el" href="group__screen.html#classftxui_1_1Screen">ftxui::Screen</a> を提供します。</p>
<p>It provides a <a class="el" href="group__screen.html#classftxui_1_1Screen">ftxui::Screen</a>.</p>
<hr />
<h1><a class="anchor" id="ftxuiscreen-1"></a>
ftxui::Screen</h1>
<p><a class="el" href="group__screen.html#classftxui_1_1Screen">ftxui::Screen</a> クラスは、ターミナルにレンダリングできるスタイル付き文字の2Dグリッドを表します。 画面を作成し、ピクセルにアクセスし、要素をレンダリングするメソッドを提供します。</p>
<p><a class="el" href="group__screen.html#a483f8ee1967e200cfc9e277b3ce00174">ftxui::Screen::PixelAt</a> メソッドを使用して、画面の個々のセル (<a class="el" href="group__screen.html#structftxui_1_1Pixel">ftxui::Pixel</a>) にアクセスできます。 このメソッドは、指定された座標にあるピクセルへの参照を返します。</p>
<p><b>例</b> </p><div class="fragment"><div class="line"><span class="preprocessor">#include &lt;<a class="code" href="screen_8hpp.html">ftxui/screen/screen.hpp</a>&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;<a class="code" href="color_8hpp.html">ftxui/screen/color.hpp</a>&gt;</span></div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">void</span> <a class="code hl_function" href="examples_2component_2button_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
<div class="line"> <span class="keyword">auto</span> screen = <a class="code hl_function" href="group__screen.html#a32b98be0603ace46d6dc9d05b330a9fd">ftxui::Screen::Create</a>(</div>
<div class="line"> ftxui::Dimension::Full(), <span class="comment">// ターミナルの全幅を使用</span></div>
<div class="line"> ftxui::Dimension::Fixed(10) <span class="comment">// 高さを10行に固定</span></div>
<div class="line"> );</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// (10, 5) の特定のピクセルにアクセス</span></div>
<div class="line"> <span class="keyword">auto</span>&amp; pixel = screen.PixelAt(10, 5);</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// ピクセルのプロパティを設定</span></div>
<div class="line"> pixel.character = U<span class="charliteral">&#39;X&#39;</span>;</div>
<div class="line"> pixel.foreground_color = <a class="code hl_enumvalue" href="group__screen.html#ae2b6d9670960e89c66d7b76167a0802fad3163c1fcda01965b692ec2c3122b743">ftxui::Color::Red</a>;</div>
<div class="line"> pixel.background_color = <a class="code hl_function" href="group__screen.html#aacec69e0aa1063fbec2cc305e7b076dd">ftxui::Color::RGB</a>(0, 255, 0);</div>
<div class="line"> pixel.bold = <span class="keyword">true</span>; <span class="comment">// 太字スタイルを設定</span></div>
<div class="line"> screen.Print(); <span class="comment">// 画面をターミナルに出力</span></div>
<div class="line">}</div>
<div class="ttc" id="acolor_8hpp_html"><div class="ttname"><a href="color_8hpp.html">color.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#l00033">examples/component/button.cpp:33</a></div></div>
<div class="ttc" id="agroup__screen_html_a32b98be0603ace46d6dc9d05b330a9fd"><div class="ttname"><a href="group__screen.html#a32b98be0603ace46d6dc9d05b330a9fd">ftxui::Screen::Create</a></div><div class="ttdeci">static Screen Create(Dimensions dimension)</div><div class="ttdoc">指定された次元を持つスクリーンを作成します。</div><div class="ttdef"><b>Definition</b> <a href="screen_8cpp_source.html#l00394">screen.cpp:394</a></div></div>
<div class="ttc" id="agroup__screen_html_aacec69e0aa1063fbec2cc305e7b076dd"><div class="ttname"><a href="group__screen.html#aacec69e0aa1063fbec2cc305e7b076dd">ftxui::Color::RGB</a></div><div class="ttdeci">static Color RGB(uint8_t red, uint8_t green, uint8_t blue)</div><div class="ttdoc">RGB表現から色を構築します。 https://en.wikipedia.org/wiki/RGB_color_model.</div><div class="ttdef"><b>Definition</b> <a href="screen_2color_8cpp_source.html#l00146">screen/color.cpp:146</a></div></div>
<div class="ttc" id="agroup__screen_html_ae2b6d9670960e89c66d7b76167a0802fad3163c1fcda01965b692ec2c3122b743"><div class="ttname"><a href="group__screen.html#ae2b6d9670960e89c66d7b76167a0802fad3163c1fcda01965b692ec2c3122b743">ftxui::Color::Red</a></div><div class="ttdeci">@ Red</div><div class="ttdef"><b>Definition</b> <a href="color_8hpp_source.html#l00058">color.hpp:58</a></div></div>
<div class="ttc" id="ascreen_8hpp_html"><div class="ttname"><a href="screen_8hpp.html">screen.hpp</a></div></div>
</div><!-- fragment --><dl class="section note"><dt>Note</dt><dd>座標が範囲外の場合、ダミーピクセルが返されます。</dd></dl>
<p>画面は <a class="el" href="group__screen.html#ad93edbe885499a712129356f1ffd506b">ftxui::Screen::Print()</a> を使用してターミナルに出力するか、 <a class="el" href="group__screen.html#a19c380b03cea21d7ac7325136a131ff0">ftxui::Screen::ToString()</a> で <code>std::string</code> に変換できます。</p>
<div class="tabbed"></div><div class="tabbed"><ul>
<li><b class="tab-title">Print()</b> <div class="fragment"><div class="line"><span class="keyword">auto</span> screen = ...;</div>
<div class="line">screen.Print();</div>
</div><!-- fragment --></li>
<li><b class="tab-title">ToString()</b> <div class="fragment"><div class="line"><span class="keyword">auto</span> screen = ...;</div>
<div class="line">std::cout &lt;&lt; screen.ToString();</div>
</div><!-- fragment --></li>
</ul>
</div><div class="tabbed"></div><p>画面の印刷後、ftxui::Screen::ResetCursorPosition() を呼び出すことで、 カーソル位置を画面の左上隅にリセットできます。</p>
<p><b>例</b> </p><div class="fragment"><div class="line"><span class="keyword">auto</span> screen = ...;</div>
<div class="line"><span class="keywordflow">while</span>(<span class="keyword">true</span>) {</div>
<div class="line"> <span class="comment">// 描画操作:</span></div>
<div class="line"> ...</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// 画面をターミナルに出力します。その後、カーソル位置と画面内容をリセットします。</span></div>
<div class="line"> std::cout &lt;&lt; screen.ToString();</div>
<div class="line"> std::cout &lt;&lt; screen.ResetCursorPosition(<span class="comment">/*clear=*/</span><span class="keyword">true</span>);</div>
<div class="line"> std::cout &lt;&lt; std::flush;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// リフレッシュレートを制御するために短時間スリープします。</span></div>
<div class="line"> std::this_thread::sleep_for(std::chrono::milliseconds(100));</div>
<div class="line">}</div>
</div><!-- fragment --><hr />
<h1><a class="anchor" id="ftxuidimension"></a>
ftxui::Dimension</h1>
<p><a class="el" href="namespaceftxui_1_1Dimension.html">ftxui::Dimension</a> ユーティリティは画面サイズを制御します。</p>
<ul>
<li><code>Dimension::Full()</code> — ターミナルの全幅または全高を使用</li>
<li><code>Dimension::Fit(element)</code> — レンダリングされた <a class="el" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">ftxui::Element</a> に合わせてサイズ調整</li>
<li><code>Dimension::Fixed(n)</code> — 厳密に <code>n</code> 列または <code>n</code> 行を使用</li>
</ul>
<p>これらの値は <code><a class="el" href="group__screen.html#a32b98be0603ace46d6dc9d05b330a9fd" title="指定された次元を持つスクリーンを作成します。">ftxui::Screen::Create()</a></code> に渡されます。</p>
<p><a class="el" href="group__screen.html#a32b98be0603ace46d6dc9d05b330a9fd">ftxui::Screen::Create()</a> は2つのオーバーロードを提供します。</p>
<ul>
<li><code>Screen::Create(Dimension)</code> は幅と高さを同じ種類のディメンションに設定します</li>
<li><code>Screen::Create(Dimension width, Dimension height)</code> は各軸で異なる制御を可能にします</li>
</ul>
<div class="fragment"><div class="line"><span class="keyword">auto</span> screen = <a class="code hl_function" href="group__screen.html#a32b98be0603ace46d6dc9d05b330a9fd">ftxui::Screen::Create</a>(</div>
<div class="line"> ftxui::Dimension::Full(), <span class="comment">// 幅</span></div>
<div class="line"> ftxui::Dimension::Fixed(10) <span class="comment">// 高さ</span></div>
<div class="line">);</div>
</div><!-- fragment --><p>作成後、要素をレンダリングして結果を表示します。</p>
<div class="fragment"><div class="line"><a class="code hl_function" href="group__dom.html#gad4b8aa9392f56ba41e2b421e046a7d83">ftxui::Render</a>(screen, element);</div>
<div class="line">screen.Print();</div>
<div class="ttc" id="agroup__dom_html_gad4b8aa9392f56ba41e2b421e046a7d83"><div class="ttname"><a href="group__dom.html#gad4b8aa9392f56ba41e2b421e046a7d83">ftxui::Render</a></div><div class="ttdeci">void Render(Screen &amp;screen, const Element &amp;element)</div><div class="ttdoc">要素をftxui::Screenに表示します。</div><div class="ttdef"><b>Definition</b> <a href="node_8cpp_source.html#l00084">node.cpp:84</a></div></div>
</div><!-- fragment --><hr />
<h1><a class="anchor" id="ftxuipixel"></a>
ftxui::Pixel</h1>
<p>画面グリッドの各セルは <a class="el" href="group__screen.html#structftxui_1_1Pixel">ftxui::Pixel</a> であり、以下を保持します。</p>
<ul>
<li>Unicode コードポイント。<ul>
<li><code>character</code></li>
</ul>
</li>
<li>ftxui::Color:<ul>
<li><code>foreground_color</code></li>
<li><code>background_color</code></li>
</ul>
</li>
<li>真偽値:<ul>
<li><code>blink</code></li>
<li><code>bold</code></li>
<li><code>dim</code></li>
<li><code>italic</code></li>
<li><code>inverted</code> (前景色と背景色を入れ替えます)</li>
<li><code>underlined</code></li>
<li><code>underlined_double</code></li>
<li><code>strikethrough</code></li>
</ul>
</li>
</ul>
<div class="fragment"><div class="line"><span class="keyword">auto</span> screen = <a class="code hl_function" href="group__screen.html#a32b98be0603ace46d6dc9d05b330a9fd">ftxui::Screen::Create</a>(</div>
<div class="line"> ftxui::Dimension::Fixed(5),</div>
<div class="line"> ftxui::Dimension::Fixed(5),</div>
<div class="line">);</div>
<div class="line"> </div>
<div class="line"><span class="keyword">auto</span>&amp; pixel = screen.PixelAt(3, 3);</div>
<div class="line">pixel.character = U<span class="charliteral">&#39;X&#39;</span>;</div>
<div class="line">pixel.bold = <span class="keyword">true</span>;</div>
<div class="line">pixel.foreground_color = <a class="code hl_enumvalue" href="group__screen.html#ae2b6d9670960e89c66d7b76167a0802fad3163c1fcda01965b692ec2c3122b743">ftxui::Color::Red</a>;</div>
<div class="line">pixel.background_color = <a class="code hl_function" href="group__screen.html#aacec69e0aa1063fbec2cc305e7b076dd">ftxui::Color::RGB</a>(0, 255, 0);</div>
<div class="line"> </div>
<div class="line">screen.Print();</div>
</div><!-- fragment --><dl class="section note"><dt>Note</dt><dd><code>PixelAt(x, y)</code> は境界チェックを行い、指定された座標にあるピクセルへの参照を返します。 範囲外の場合、ダミーピクセル参照が返されます。</dd></dl>
<p>画面内の各セルは <a class="el" href="group__screen.html#structftxui_1_1Pixel">ftxui::Pixel</a> です。これらを以下のように変更できます。</p>
<div class="fragment"><div class="line"><span class="keyword">auto</span>&amp; pixel = screen.PixelAt(x, y);</div>
<div class="line">pixel.character = U<span class="charliteral">&#39;X&#39;</span>;</div>
<div class="line">pixel.bold = <span class="keyword">true</span>;</div>
<div class="line">pixel.foreground_color = Color::Red;</div>
</div><!-- fragment --><hr />
<h1><a class="anchor" id="ftxuicolor"></a>
ftxui::Color</h1>
<p><a class="el" href="group__screen.html#classftxui_1_1Color">ftxui::Color</a> クラスは、各 <a class="el" href="group__screen.html#structftxui_1_1Pixel">ftxui::Pixel</a> の前景色と背景色を定義するために使用されます。</p>
<p>さまざまな色空間と事前定義されたパレットをサポートしています。FTXUI は、 要求された色がターミナルでサポートされていない場合、ターミナルで利用可能な 最も近い色に動的にフォールバックします。</p>
<p><b>色空間</b></p>
<ul>
<li><b>Default</b>: <code><a class="el" href="group__screen.html#aa4be56f94fc180d7b070df23c235b0c7a79935518a3889663d8688b6b01fff051">ftxui::Color::Default</a></code> (ターミナルのデフォルト色)</li>
<li><b>16色パレット</b> <a href="https://arthursonzogni.github.io/FTXUI/examples/?file=dom/color_gallery">デモ</a>:<ul>
<li><code><a class="el" href="group__screen.html#ae2b6d9670960e89c66d7b76167a0802fac1e9bce8242f443c54c7405223d616cd">ftxui::Color::Black</a></code>,</li>
<li><code><a class="el" href="group__screen.html#ae2b6d9670960e89c66d7b76167a0802fad3163c1fcda01965b692ec2c3122b743">ftxui::Color::Red</a></code>,</li>
<li>...</li>
</ul>
</li>
<li><b>256色パレット</b> <a href="https://arthursonzogni.github.io/FTXUI/examples/?file=dom/color_palette256">デモ</a>:<ul>
<li><code><a class="el" href="group__screen.html#abd07c48f62cc507fafa2486a43130fcfa7d2d4cc3af6756a4eac7d12fbe4775d4">ftxui::Color::Chartreuse1</a></code>,</li>
<li><code><a class="el" href="group__screen.html#abd07c48f62cc507fafa2486a43130fcfa0c92c7e17edeca09b7c63c8a783a562f">ftxui::Color::DarkViolet</a></code>,</li>
<li>...</li>
</ul>
</li>
<li><b>True color</b> (24bit) [デモ](<a href="https://arthursonzogni.github.io/FTXUI/examples/?file=dom/color_truecolor_HSV:">https://arthursonzogni.github.io/FTXUI/examples/?file=dom/color_truecolor_HSV:</a><ul>
<li><code><a class="el" href="group__screen.html#aacec69e0aa1063fbec2cc305e7b076dd" title="RGB表現から色を構築します。 https://en.wikipedia.org/wiki/RGB_color_model.">ftxui::Color::RGB(uint8_t red, uint8_t green, uint8_t blue)</a></code></li>
<li><code><a class="el" href="group__screen.html#a1a119fd00beafc7d2aa5f94518e38fc5" title="HSV表現から色を構築します。 https://en.wikipedia.org/wiki/HSL_and_HSV.">ftxui::Color::HSV(uint8_t h, uint8_t s, uint8_t v)</a></code>.</li>
</ul>
</li>
</ul>
<dl class="section note"><dt>Note</dt><dd><a class="el" href="group__screen.html#gae6e034f37aa66cfe4458a8cb6e8fc526">ftxui::Terminal::ColorSupport()</a> を使用してターミナルの機能を確認できます。 <br />
<br />
これは <a class="el" href="group__dom.html#ga65945a706131f407a47a1b9960dc1a4a">ftxui::Terminal::SetColorSupport()</a> を使用して手動で設定できます。 </dd></dl>
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