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<div id="projectname">FTXUI
&#160;<span id="projectnumber">0.10.0</span>
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<div id="projectbrief">C++ functional terminal UI.</div>
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<div class="headertitle"><div class="title">examples/dom/package_manager.cpp</div></div>
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<div class="fragment"><div class="line"><span class="preprocessor">#include &lt;chrono&gt;</span> <span class="comment">// for operator&quot;&quot;s, chrono_literals</span></div>
<div class="line"><span class="preprocessor">#include &lt;<a class="code" href="elements_8hpp.html">ftxui/dom/elements.hpp</a>&gt;</span> <span class="comment">// for operator|, text, Element, hbox, bold, color, filler, separator, vbox, window, gauge, Fit, size, dim, EQUAL, WIDTH</span></div>
<div class="line"><span class="preprocessor">#include &lt;<a class="code" href="screen_8hpp.html">ftxui/screen/screen.hpp</a>&gt;</span> <span class="comment">// for Full, Screen</span></div>
<div class="line"><span class="preprocessor">#include &lt;iostream&gt;</span> <span class="comment">// for cout, endl, ostream</span></div>
<div class="line"><span class="preprocessor">#include &lt;list&gt;</span> <span class="comment">// for list, operator!=, _List_iterator, _List_iterator&lt;&gt;::_Self</span></div>
<div class="line"><span class="preprocessor">#include &lt;memory&gt;</span> <span class="comment">// for allocator, shared_ptr, allocator_traits&lt;&gt;::value_type</span></div>
<div class="line"><span class="preprocessor">#include &lt;string&gt;</span> <span class="comment">// for string, operator&lt;&lt;, to_string</span></div>
<div class="line"><span class="preprocessor">#include &lt;thread&gt;</span> <span class="comment">// for sleep_for</span></div>
<div class="line"><span class="preprocessor">#include &lt;utility&gt;</span> <span class="comment">// for move</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="node_8hpp.html">ftxui/dom/node.hpp</a>&quot;</span> <span class="comment">// for Render</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="box_8hpp.html">ftxui/screen/box.hpp</a>&quot;</span> <span class="comment">// for ftxui</span></div>
<div class="line"><span class="preprocessor">#include &quot;<a class="code" href="color_8hpp.html">ftxui/screen/color.hpp</a>&quot;</span> <span class="comment">// for Color, Color::Green, Color::Red, Color::RedLight</span></div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keyword">const</span> <span class="keywordtype">char</span>* argv[]) {</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="keyword">struct </span>Task {</div>
<div class="line"> std::string name;</div>
<div class="line"> <span class="keywordtype">int</span> number_of_threads;</div>
<div class="line"> <span class="keywordtype">int</span> downloaded;</div>
<div class="line"> <span class="keywordtype">int</span> size;</div>
<div class="line"> };</div>
<div class="line"> </div>
<div class="line"> std::list&lt;Task&gt; remaining_tasks = {</div>
<div class="line"> {<span class="stringliteral">&quot;contact server &quot;</span>, 10, 0, 6 * 25},</div>
<div class="line"> {<span class="stringliteral">&quot;download index.html &quot;</span>, 10, 0, 9 * 25},</div>
<div class="line"> {<span class="stringliteral">&quot;download script.js &quot;</span>, 1, 0, 3 * 25},</div>
<div class="line"> {<span class="stringliteral">&quot;download style.js &quot;</span>, 1, 0, 4 * 25},</div>
<div class="line"> {<span class="stringliteral">&quot;download image.png &quot;</span>, 1, 0, 5 * 25},</div>
<div class="line"> {<span class="stringliteral">&quot;download big_1.png &quot;</span>, 1, 0, 30 * 25},</div>
<div class="line"> {<span class="stringliteral">&quot;download icon_1.png &quot;</span>, 1, 0, 7 * 25},</div>
<div class="line"> {<span class="stringliteral">&quot;download icon_2.png &quot;</span>, 1, 0, 8 * 25},</div>
<div class="line"> {<span class="stringliteral">&quot;download big_2.png &quot;</span>, 1, 0, 30 * 25},</div>
<div class="line"> {<span class="stringliteral">&quot;download small_1.png &quot;</span>, 1, 0, 10 * 25},</div>
<div class="line"> {<span class="stringliteral">&quot;download small_2.png &quot;</span>, 1, 0, 11 * 25},</div>
<div class="line"> {<span class="stringliteral">&quot;download small_3.png &quot;</span>, 1, 0, 12 * 25},</div>
<div class="line"> };</div>
<div class="line"> </div>
<div class="line"> std::list&lt;Task&gt; displayed_task;</div>
<div class="line"> </div>
<div class="line"> <span class="keywordtype">int</span> remaining_threads = 12;</div>
<div class="line"> </div>
<div class="line"> <span class="keywordtype">int</span> nb_queued = remaining_tasks.size();</div>
<div class="line"> <span class="keywordtype">int</span> nb_active = 0;</div>
<div class="line"> <span class="keywordtype">int</span> nb_done = 0;</div>
<div class="line"> </div>
<div class="line"> <span class="keyword">auto</span> to_text = [](<span class="keywordtype">int</span> number) {</div>
<div class="line"> <span class="keywordflow">return</span> text(std::to_string(number)) | size(WIDTH, EQUAL, 3);</div>
<div class="line"> };</div>
<div class="line"> </div>
<div class="line"> <span class="keyword">auto</span> renderTask = [&amp;](<span class="keyword">const</span> Task&amp; task) {</div>
<div class="line"> <span class="keyword">auto</span> style = (task.downloaded == task.size) ? dim : bold;</div>
<div class="line"> <span class="keywordflow">return</span> hbox({</div>
<div class="line"> text(task.name) | style,</div>
<div class="line"> separator(),</div>
<div class="line"> to_text(task.downloaded),</div>
<div class="line"> text(<span class="stringliteral">&quot;/&quot;</span>),</div>
<div class="line"> to_text(task.size),</div>
<div class="line"> separator(),</div>
<div class="line"> gauge(task.downloaded / <span class="keywordtype">float</span>(task.size)),</div>
<div class="line"> });</div>
<div class="line"> };</div>
<div class="line"> </div>
<div class="line"> <span class="keyword">auto</span> renderSummary = [&amp;]() {</div>
<div class="line"> <span class="keyword">auto</span> summary = vbox({</div>
<div class="line"> hbox({</div>
<div class="line"> text(<span class="stringliteral">&quot;- done: &quot;</span>),</div>
<div class="line"> to_text(nb_done) | bold,</div>
<div class="line"> }) | color(Color::Green),</div>
<div class="line"> hbox({</div>
<div class="line"> text(<span class="stringliteral">&quot;- active: &quot;</span>),</div>
<div class="line"> to_text(nb_active) | bold,</div>
<div class="line"> }) | color(Color::RedLight),</div>
<div class="line"> hbox({</div>
<div class="line"> text(<span class="stringliteral">&quot;- queue: &quot;</span>),</div>
<div class="line"> to_text(nb_queued) | bold,</div>
<div class="line"> }) | color(Color::Red),</div>
<div class="line"> });</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">return</span> window(text(<span class="stringliteral">&quot; Summary &quot;</span>), summary);</div>
<div class="line"> };</div>
<div class="line"> </div>
<div class="line"> <span class="keyword">auto</span> render = [&amp;]() {</div>
<div class="line"> std::vector&lt;Element&gt; entries;</div>
<div class="line"> <span class="keywordflow">for</span> (<span class="keyword">auto</span>&amp; task : displayed_task)</div>
<div class="line"> entries.push_back(renderTask(task));</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">return</span> vbox({</div>
<div class="line"> <span class="comment">// List of tasks.</span></div>
<div class="line"> window(text(<span class="stringliteral">&quot; Task &quot;</span>), vbox(std::move(entries))),</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Summary.</span></div>
<div class="line"> hbox({</div>
<div class="line"> renderSummary(),</div>
<div class="line"> filler(),</div>
<div class="line"> }),</div>
<div class="line"> });</div>
<div class="line"> };</div>
<div class="line"> </div>
<div class="line"> <span class="keyword">auto</span> updateModel = [&amp;]() {</div>
<div class="line"> <span class="keywordflow">for</span> (<span class="keyword">auto</span>&amp; task : displayed_task) {</div>
<div class="line"> <span class="keywordflow">if</span> (task.downloaded != task.size) {</div>
<div class="line"> task.downloaded++;</div>
<div class="line"> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (task.number_of_threads) {</div>
<div class="line"> remaining_threads += task.number_of_threads;</div>
<div class="line"> task.number_of_threads = 0;</div>
<div class="line"> nb_active--;</div>
<div class="line"> nb_done++;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (remaining_tasks.size() &amp;&amp;</div>
<div class="line"> remaining_tasks.front().number_of_threads &lt;= remaining_threads) {</div>
<div class="line"> remaining_threads -= remaining_tasks.front().number_of_threads;</div>
<div class="line"> displayed_task.push_back(remaining_tasks.front());</div>
<div class="line"> remaining_tasks.pop_front();</div>
<div class="line"> nb_queued--;</div>
<div class="line"> nb_active++;</div>
<div class="line"> }</div>
<div class="line"> };</div>
<div class="line"> </div>
<div class="line"> std::string reset_position;</div>
<div class="line"> <span class="keywordflow">for</span> (;;) {</div>
<div class="line"> <span class="comment">// Draw.</span></div>
<div class="line"> <span class="keyword">auto</span> document = render();</div>
<div class="line"> <span class="keyword">auto</span> screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));</div>
<div class="line"> Render(screen, document);</div>
<div class="line"> std::cout &lt;&lt; reset_position;</div>
<div class="line"> screen.Print();</div>
<div class="line"> reset_position = screen.ResetPosition();</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Simulate time.</span></div>
<div class="line"> <span class="keyword">using namespace </span>std::chrono_literals;</div>
<div class="line"> std::this_thread::sleep_for(0.01s);</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Exit</span></div>
<div class="line"> <span class="keywordflow">if</span> (nb_active + nb_queued == 0)</div>
<div class="line"> <span class="keywordflow">break</span>;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Update the model for the next frame.</span></div>
<div class="line"> updateModel();</div>
<div class="line"> }</div>
<div class="line"> std::cout &lt;&lt; std::endl;</div>
<div class="line">}</div>
<div class="line"> </div>
<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="ttc" id="abox_8hpp_html"><div class="ttname"><a href="box_8hpp.html">box.hpp</a></div></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="aelements_8hpp_html"><div class="ttname"><a href="elements_8hpp.html">elements.hpp</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="captured__mouse_8hpp_source.html#l00006">captured_mouse.hpp:6</a></div></div>
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<div class="ttc" id="ascreen_8hpp_html"><div class="ttname"><a href="screen_8hpp.html">screen.hpp</a></div></div>
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