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<div class="headertitle"><div class="title">src/ftxui/dom/linear_gradient.cpp</div></div>
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<div class="contents">
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<a href="src_2ftxui_2dom_2linear__gradient_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 2023 Arthur Sonzogni. All rights reserved.</span></div>
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<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>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">// the LICENSE file.</span></div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include <algorithm></span> <span class="comment">// for max, min, sort, copy</span></div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="preprocessor">#include <cmath></span> <span class="comment">// for fmod, cos, sin</span></div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#include <cstddef></span> <span class="comment">// for size_t</span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#include <<a class="code" href="linear__gradient_8hpp.html">ftxui/dom/linear_gradient.hpp</a>></span> <span class="comment">// for LinearGradient::Stop, LinearGradient</span></div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include <memory></span> <span class="comment">// for allocator_traits<>::value_type, make_shared</span></div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include <optional></span> <span class="comment">// for optional, operator!=, operator<</span></div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#include <utility></span> <span class="comment">// for move</span></div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include <vector></span> <span class="comment">// for vector</span></div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> </div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include "<a class="code" href="elements_8hpp.html">ftxui/dom/elements.hpp</a>"</span> <span class="comment">// for Element, Decorator, bgcolor, color</span></div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#include "<a class="code" href="node__decorator_8hpp.html">ftxui/dom/node_decorator.hpp</a>"</span> <span class="comment">// for NodeDecorator</span></div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="preprocessor">#include "<a class="code" href="box_8hpp.html">ftxui/screen/box.hpp</a>"</span> <span class="comment">// for Box</span></div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor">#include "<a class="code" href="color_8hpp.html">ftxui/screen/color.hpp</a>"</span> <span class="comment">// for Color, Color::Default, Color::Blue</span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#include "<a class="code" href="screen_8hpp.html">ftxui/screen/screen.hpp</a>"</span> <span class="comment">// for Pixel, Screen</span></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> </div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceftxui.html">ftxui</a> {</div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="keyword">namespace </span>{</div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> </div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="keyword">struct </span>LinearGradientNormalized {</div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"><a class="line" href="src_2ftxui_2dom_2linear__gradient_8cpp.html#ab8ef1bf8a70cc07c6d55823c390a7e76"> 23</a></span> <span class="keywordtype">float</span> <a class="code hl_variable" href="src_2ftxui_2dom_2linear__gradient_8cpp.html#ab8ef1bf8a70cc07c6d55823c390a7e76">angle</a> = 0.F;</div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"><a class="line" href="src_2ftxui_2dom_2linear__gradient_8cpp.html#ac3290ba0758760ac0d6df01f7707dd94"> 24</a></span> std::vector<Color> <a class="code hl_variable" href="src_2ftxui_2dom_2linear__gradient_8cpp.html#ac3290ba0758760ac0d6df01f7707dd94">colors</a>;</div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"><a class="line" href="src_2ftxui_2dom_2linear__gradient_8cpp.html#af3fd42b7427cb742f96e7ec3244fb7cf"> 25</a></span> std::vector<float> <a class="code hl_variable" href="src_2ftxui_2dom_2linear__gradient_8cpp.html#af3fd42b7427cb742f96e7ec3244fb7cf">positions</a>; <span class="comment">// Sorted.</span></div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span>};</div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> </div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="comment">// Convert a LinearGradient to a normalized version.</span></div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span>LinearGradientNormalized Normalize(LinearGradient gradient) {</div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> <span class="comment">// Handle gradient of size 0.</span></div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> <span class="keywordflow">if</span> (gradient.stops.empty()) {</div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> <span class="keywordflow">return</span> LinearGradientNormalized{</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> 0.F,</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> {<a class="code hl_enumvalue" href="group__screen.html#aa4be56f94fc180d7b070df23c235b0c7a79935518a3889663d8688b6b01fff051">Color::Default</a>, <a class="code hl_enumvalue" href="group__screen.html#aa4be56f94fc180d7b070df23c235b0c7a79935518a3889663d8688b6b01fff051">Color::Default</a>},</div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> {0.F, 1.F},</div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> };</div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> }</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> </div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <span class="comment">// Fill in the two extent, if not provided.</span></div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="keywordflow">if</span> (!gradient.stops.front().position) {</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> gradient.stops.front().position = 0.F;</div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> }</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keywordflow">if</span> (!gradient.stops.back().position) {</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> gradient.stops.back().position = 1.F;</div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> }</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> </div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// Fill in the blank, by interpolating positions.</span></div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> <span class="keywordtype">size_t</span> last_checkpoint = 0;</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 1; i < gradient.stops.size(); ++i) {</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keywordflow">if</span> (!gradient.stops[i].position) {</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> }</div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> </div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="keywordflow">if</span> (i - last_checkpoint >= 2) {</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">const</span> <span class="keywordtype">float</span> min = gradient.stops[i].position.value(); <span class="comment">// NOLINT</span></div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keyword">const</span> <span class="keywordtype">float</span> max =</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> gradient.stops[last_checkpoint].position.value(); <span class="comment">// NOLINT</span></div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> j = last_checkpoint + 1; j < i; ++j) {</div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> gradient.stops[j].position = min + (max - min) *</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordtype">float</span>(j - last_checkpoint) /</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> float(i - last_checkpoint);</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> }</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> }</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> </div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> last_checkpoint = i;</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> }</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> </div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="comment">// Sort the stops by position.</span></div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> std::sort(</div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> gradient.stops.begin(), gradient.stops.end(),</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> [](<span class="keyword">const</span> <span class="keyword">auto</span>& a, <span class="keyword">const</span> <span class="keyword">auto</span>& b) { return a.position < b.position; });</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> </div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="comment">// If we don't being with zero, add a stop at zero.</span></div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="keywordflow">if</span> (gradient.stops.front().position != 0) {</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> gradient.stops.insert(gradient.stops.begin(),</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> {gradient.stops.front().color, 0.F});</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> }</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="comment">// If we don't end with one, add a stop at one.</span></div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="keywordflow">if</span> (gradient.stops.back().position != 1) {</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> gradient.stops.push_back({gradient.stops.back().color, 1.F});</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> }</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> </div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="comment">// Normalize the angle.</span></div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> LinearGradientNormalized normalized;</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <span class="keyword">const</span> <span class="keywordtype">float</span> modulo = 360.F;</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> normalized.angle =</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> std::fmod(std::fmod(gradient.angle, modulo) + modulo, modulo);</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> <span class="keywordflow">for</span> (<span class="keyword">auto</span>& stop : gradient.stops) {</div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> normalized.colors.push_back(stop.color);</div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> <span class="comment">// NOLINTNEXTLINE</span></div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> normalized.positions.push_back(stop.position.value());</div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> }</div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> <span class="keywordflow">return</span> normalized;</div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span>}</div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> </div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span><a class="code hl_enumeration" href="group__screen.html#gab87bacfdad76e61b9412d7124be44c1c">Color</a> Interpolate(<span class="keyword">const</span> LinearGradientNormalized& gradient, <span class="keywordtype">float</span> t) {</div>
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<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> <span class="comment">// Find the right color in the gradient's stops.</span></div>
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<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> <span class="keywordtype">size_t</span> i = 1;</div>
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<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
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<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> <span class="comment">// Note that `t` might be slightly greater than 1.0 due to floating point</span></div>
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> <span class="comment">// precision. This is why we need to handle the case where `t` is greater</span></div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="comment">// than the last stop's position.</span></div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> <span class="comment">// See https://github.com/ArthurSonzogni/FTXUI/issues/998</span></div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> <span class="keywordflow">if</span> (i >= gradient.positions.size()) {</div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> <span class="keyword">const</span> <span class="keywordtype">float</span> half = 0.5F;</div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <span class="keywordflow">return</span> <a class="code hl_function" href="group__screen.html#ae5d82c5fbae4f6561c9471c11c0a461b">Color::Interpolate</a>(half, gradient.colors.back(),</div>
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> gradient.colors.back());</div>
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<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> }</div>
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<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="keywordflow">if</span> (t <= gradient.positions[i]) {</div>
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<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> <span class="keywordflow">break</span>;</div>
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<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> }</div>
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> ++i;</div>
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<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> }</div>
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<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> </div>
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<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> <span class="keyword">const</span> <span class="keywordtype">float</span> t0 = gradient.positions[i - 1];</div>
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<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> <span class="keyword">const</span> <span class="keywordtype">float</span> t1 = gradient.positions[i - 0];</div>
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<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> <span class="keyword">const</span> <span class="keywordtype">float</span> tt = (t - t0) / (t1 - t0);</div>
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<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> </div>
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<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> <span class="keyword">const</span> <a class="code hl_enumeration" href="group__screen.html#gab87bacfdad76e61b9412d7124be44c1c">Color</a>& c0 = gradient.colors[i - 1];</div>
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<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <span class="keyword">const</span> <a class="code hl_enumeration" href="group__screen.html#gab87bacfdad76e61b9412d7124be44c1c">Color</a>& c1 = gradient.colors[i - 0];</div>
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<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> <span class="keyword">const</span> <a class="code hl_enumeration" href="group__screen.html#gab87bacfdad76e61b9412d7124be44c1c">Color</a>& cc = <a class="code hl_function" href="group__screen.html#ae5d82c5fbae4f6561c9471c11c0a461b">Color::Interpolate</a>(tt, c0, c1);</div>
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<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> </div>
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<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> <span class="keywordflow">return</span> cc;</div>
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<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span>}</div>
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<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> </div>
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<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span><span class="keyword">class </span>LinearGradientColor : <span class="keyword">public</span> NodeDecorator {</div>
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<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="keyword">public</span>:</div>
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<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> <span class="keyword">explicit</span> LinearGradientColor(<a class="code hl_typedef" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">Element</a> child,</div>
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<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> <span class="keyword">const</span> LinearGradient& gradient,</div>
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<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> <span class="keywordtype">bool</span> background_color)</div>
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<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> : NodeDecorator(std::move(child)),</div>
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<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> gradient_(Normalize(gradient)),</div>
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<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> background_color_{background_color} {}</div>
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<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> </div>
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<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> <span class="keyword">private</span>:</div>
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<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> <span class="keywordtype">void</span> <a class="code hl_function" href="group__dom.html#gad4b8aa9392f56ba41e2b421e046a7d83">Render</a>(Screen& screen)<span class="keyword"> override </span>{</div>
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<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> <span class="keyword">const</span> <span class="keywordtype">float</span> degtorad = 0.01745329251F;</div>
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<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> <span class="keyword">const</span> <span class="keywordtype">float</span> dx = std::cos(gradient_.angle * degtorad);</div>
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<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> <span class="keyword">const</span> <span class="keywordtype">float</span> dy = std::sin(gradient_.angle * degtorad);</div>
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<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> </div>
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<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> <span class="comment">// Project every corner to get the extent of the gradient.</span></div>
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<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> <span class="keyword">const</span> <span class="keywordtype">float</span> p1 = float(box_.x_min) * dx + float(box_.y_min) * dy;</div>
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<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <span class="keyword">const</span> <span class="keywordtype">float</span> p2 = float(box_.x_min) * dx + float(box_.y_max) * dy;</div>
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<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> <span class="keyword">const</span> <span class="keywordtype">float</span> p3 = float(box_.x_max) * dx + float(box_.y_min) * dy;</div>
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<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> <span class="keyword">const</span> <span class="keywordtype">float</span> p4 = float(box_.x_max) * dx + float(box_.y_max) * dy;</div>
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<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> <span class="keyword">const</span> <span class="keywordtype">float</span> min = std::min({p1, p2, p3, p4});</div>
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<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> <span class="keyword">const</span> <span class="keywordtype">float</span> max = std::max({p1, p2, p3, p4});</div>
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<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> </div>
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<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> <span class="comment">// Renormalize the projection to [0, 1] using the extent and projective</span></div>
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<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> <span class="comment">// geometry.</span></div>
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<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> <span class="keyword">const</span> <span class="keywordtype">float</span> dX = dx / (max - min);</div>
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<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> <span class="keyword">const</span> <span class="keywordtype">float</span> dY = dy / (max - min);</div>
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<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> <span class="keyword">const</span> <span class="keywordtype">float</span> dZ = -min / (max - min);</div>
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<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> </div>
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<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> <span class="comment">// Project every pixel to get the color.</span></div>
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<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> <span class="keywordflow">if</span> (background_color_) {</div>
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<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> y = box_.y_min; y <= box_.y_max; ++y) {</div>
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<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> x = box_.x_min; x <= box_.x_max; ++x) {</div>
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<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> <span class="keyword">const</span> <span class="keywordtype">float</span> t = float(x) * dX + float(y) * dY + dZ;</div>
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<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> screen.PixelAt(x, y).background_color = Interpolate(gradient_, t);</div>
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<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> }</div>
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<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> }</div>
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<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> y = box_.y_min; y <= box_.y_max; ++y) {</div>
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<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> x = box_.x_min; x <= box_.x_max; ++x) {</div>
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<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> <span class="keyword">const</span> <span class="keywordtype">float</span> t = float(x) * dX + float(y) * dY + dZ;</div>
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<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> screen.PixelAt(x, y).foreground_color = Interpolate(gradient_, t);</div>
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<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> }</div>
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<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> }</div>
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<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> }</div>
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<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> </div>
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<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> <a class="code hl_friend" href="group__dom.html#ab35030b64136afa183d474d11bd1f6dd">NodeDecorator::Render</a>(screen);</div>
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<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> }</div>
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<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> </div>
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<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> LinearGradientNormalized gradient_;</div>
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<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> <span class="keywordtype">bool</span> background_color_;</div>
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<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span>};</div>
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<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> </div>
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<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span>} <span class="comment">// namespace</span></div>
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<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span><span class="comment"></span> </div>
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<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span><span class="comment">/// @brief Build the "empty" gradient. This is often followed by calls to</span></div>
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<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span><span class="comment">/// LinearGradient::Angle() and LinearGradient::Stop().</span></div>
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<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span><span class="comment">/// Example:</span></div>
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<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span><span class="comment">/// ```cpp</span></div>
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<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span><span class="comment">/// auto gradient =</span></div>
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<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span><span class="comment">/// LinearGradient()</span></div>
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<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span><span class="comment">/// .Angle(45)</span></div>
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<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span><span class="comment">/// .Stop(Color::Red, 0.0)</span></div>
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<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span><span class="comment">/// .Stop(Color::Green, 0.5)</span></div>
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<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span><span class="comment">/// .Stop(Color::Blue, 1.0);;</span></div>
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<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span><span class="comment">/// ```</span></div>
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<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span><span class="comment"></span><a class="code hl_function" href="group__dom.html#a5e989e4841fbba91e1714f977c5c58b9">LinearGradient::LinearGradient</a>() = <span class="keywordflow">default</span>;</div>
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<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span><span class="comment"></span> </div>
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<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span><span class="comment">/// @brief Build a gradient with two colors.</span></div>
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<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span><span class="comment">/// @param begin The color at the beginning of the gradient.</span></div>
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<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span><span class="comment">/// @param end The color at the end of the gradient.</span></div>
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<div class="foldopen" id="foldopen00197" data-start="{" data-end="}">
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<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"><a class="line" href="group__dom.html#ac57e39e64c79b5389f234eeaebfbb2fd"> 197</a></span><span class="comment"></span><a class="code hl_function" href="group__dom.html#a5e989e4841fbba91e1714f977c5c58b9">LinearGradient::LinearGradient</a>(<a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> begin, <a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> end)</div>
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<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span> : <a class="code hl_struct" href="group__dom.html#structftxui_1_1LinearGradient">LinearGradient</a>(0, begin, end) {}</div>
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</div>
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<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span><span class="comment"></span> </div>
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<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span><span class="comment">/// @brief Build a gradient with two colors and an angle.</span></div>
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<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span><span class="comment">/// @param a The angle of the gradient.</span></div>
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<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span><span class="comment">/// @param begin The color at the beginning of the gradient.</span></div>
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<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span><span class="comment">/// @param end The color at the end of the gradient.</span></div>
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<div class="foldopen" id="foldopen00204" data-start="{" data-end="}">
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<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"><a class="line" href="group__dom.html#adbf0567cfc8e05051a4236d6541f63b8"> 204</a></span><span class="comment"></span><a class="code hl_function" href="group__dom.html#a5e989e4841fbba91e1714f977c5c58b9">LinearGradient::LinearGradient</a>(<span class="keywordtype">float</span> a, <a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> begin, <a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> end) : <a class="code hl_variable" href="src_2ftxui_2dom_2linear__gradient_8cpp.html#ab8ef1bf8a70cc07c6d55823c390a7e76">angle</a>(a) {</div>
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<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span> <a class="code hl_variable" href="group__dom.html#a9c56e5fb8075d8a48b1b0c3b4ea31831">stops</a>.push_back({begin, {}});</div>
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|
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span> <a class="code hl_variable" href="group__dom.html#a9c56e5fb8075d8a48b1b0c3b4ea31831">stops</a>.push_back({end, {}});</div>
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<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span>}</div>
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</div>
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<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span><span class="comment"></span> </div>
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<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span><span class="comment">/// @brief Set the angle of the gradient.</span></div>
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<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span><span class="comment">/// @param a The angle of the gradient.</span></div>
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<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span><span class="comment">/// @return The gradient.</span></div>
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<div class="foldopen" id="foldopen00212" data-start="{" data-end="}">
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<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"><a class="line" href="group__dom.html#a251d447c54f49914a2cbf5dc16fc8b5b"> 212</a></span><span class="comment"></span><a class="code hl_struct" href="group__dom.html#structftxui_1_1LinearGradient">LinearGradient</a>& <a class="code hl_function" href="group__dom.html#a251d447c54f49914a2cbf5dc16fc8b5b">LinearGradient::Angle</a>(<span class="keywordtype">float</span> a) {</div>
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<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span> <a class="code hl_variable" href="group__dom.html#ab8ef1bf8a70cc07c6d55823c390a7e76">angle</a> = a;</div>
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<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
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<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span>}</div>
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</div>
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<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span><span class="comment"></span> </div>
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<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span><span class="comment">/// @brief Add a color stop to the gradient.</span></div>
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<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span><span class="comment">/// @param c The color of the stop.</span></div>
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<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span><span class="comment">/// @param p The position of the stop.</span></div>
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<div class="foldopen" id="foldopen00220" data-start="{" data-end="}">
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<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"><a class="line" href="group__dom.html#a03b10012f78e1c731616ce760d28df40"> 220</a></span><span class="comment"></span><a class="code hl_struct" href="group__dom.html#structftxui_1_1LinearGradient">LinearGradient</a>& <a class="code hl_function" href="group__dom.html#a03b10012f78e1c731616ce760d28df40">LinearGradient::Stop</a>(<a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> c, <span class="keywordtype">float</span> p) {</div>
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|
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span> <a class="code hl_variable" href="group__dom.html#a9c56e5fb8075d8a48b1b0c3b4ea31831">stops</a>.push_back({c, p});</div>
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|
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span> <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
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<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span>}</div>
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</div>
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<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span><span class="comment"></span> </div>
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<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span><span class="comment">/// @brief Add a color stop to the gradient.</span></div>
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<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span><span class="comment">/// @param c The color of the stop.</span></div>
|
|
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span><span class="comment">/// @return The gradient.</span></div>
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|
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span><span class="comment">/// @note The position of the stop is interpolated from nearby stops.</span></div>
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<div class="foldopen" id="foldopen00229" data-start="{" data-end="}">
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|
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"><a class="line" href="group__dom.html#ab85b009cd214d3bd1b3bb7f704af0da6"> 229</a></span><span class="comment"></span><a class="code hl_struct" href="group__dom.html#structftxui_1_1LinearGradient">LinearGradient</a>& <a class="code hl_function" href="group__dom.html#a03b10012f78e1c731616ce760d28df40">LinearGradient::Stop</a>(<a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> c) {</div>
|
|
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> <a class="code hl_variable" href="group__dom.html#a9c56e5fb8075d8a48b1b0c3b4ea31831">stops</a>.push_back({c, {}});</div>
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|
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
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|
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span>}</div>
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</div>
|
|
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span><span class="comment"></span> </div>
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<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span><span class="comment">/// @brief Set the foreground color of an element with linear-gradient effect.</span></div>
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|
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span><span class="comment">/// @param gradient The gradient effect to be applied on the output element.</span></div>
|
|
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span><span class="comment">/// @param child The input element.</span></div>
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|
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span><span class="comment">/// @return The output element colored.</span></div>
|
|
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span><span class="comment">/// @ingroup dom</span></div>
|
|
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno"> 239</span><span class="comment">///</span></div>
|
|
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span><span class="comment">/// ### Example</span></div>
|
|
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"> 241</span><span class="comment">///</span></div>
|
|
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span><span class="comment">/// ```cpp</span></div>
|
|
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span><span class="comment">/// color(LinearGradient{0, {Color::Red, Color::Blue}}, text("Hello"))</span></div>
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<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span><span class="comment">/// ```</span></div>
|
|
<div class="foldopen" id="foldopen00245" data-start="{" data-end="}">
|
|
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"><a class="line" href="group__dom.html#ga050df9c8ed04eec13309d6c0542c636d"> 245</a></span><span class="comment"></span><a class="code hl_typedef" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">Element</a> <a class="code hl_function" href="group__dom.html#gaf61b489da39ca5e24b68e6e1a2b09c0d">color</a>(<span class="keyword">const</span> <a class="code hl_struct" href="group__dom.html#structftxui_1_1LinearGradient">LinearGradient</a>& gradient, <a class="code hl_typedef" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">Element</a> child) {</div>
|
|
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span> <span class="keywordflow">return</span> std::make_shared<LinearGradientColor>(std::move(child), gradient,</div>
|
|
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> <span class="comment">/*background_color*/</span> <span class="keyword">false</span>);</div>
|
|
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span>}</div>
|
|
</div>
|
|
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span><span class="comment"></span> </div>
|
|
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span><span class="comment">/// @brief Set the background color of an element with linear-gradient effect.</span></div>
|
|
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span><span class="comment">/// @param gradient The gradient effect to be applied on the output element.</span></div>
|
|
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span><span class="comment">/// @param child The input element.</span></div>
|
|
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span><span class="comment">/// @return The output element colored.</span></div>
|
|
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span><span class="comment">/// @ingroup dom</span></div>
|
|
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span><span class="comment">///</span></div>
|
|
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span><span class="comment">/// ### Example</span></div>
|
|
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span><span class="comment">///</span></div>
|
|
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span><span class="comment">/// ```cpp</span></div>
|
|
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span><span class="comment">/// bgcolor(LinearGradient{0, {Color::Red, Color::Blue}}, text("Hello"))</span></div>
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|
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span><span class="comment">/// ```</span></div>
|
|
<div class="foldopen" id="foldopen00261" data-start="{" data-end="}">
|
|
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"><a class="line" href="group__dom.html#gaaac1622d43662a6a02113d9230a4fdd4"> 261</a></span><span class="comment"></span><a class="code hl_typedef" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">Element</a> <a class="code hl_function" href="group__dom.html#ga01d4c5aaf0447e862246849111782245">bgcolor</a>(<span class="keyword">const</span> <a class="code hl_struct" href="group__dom.html#structftxui_1_1LinearGradient">LinearGradient</a>& gradient, <a class="code hl_typedef" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">Element</a> child) {</div>
|
|
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span> <span class="keywordflow">return</span> std::make_shared<LinearGradientColor>(std::move(child), gradient,</div>
|
|
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span> <span class="comment">/*background_color*/</span> <span class="keyword">true</span>);</div>
|
|
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span>}</div>
|
|
</div>
|
|
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span><span class="comment"></span> </div>
|
|
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span><span class="comment">/// @brief Decorate using a linear-gradient effect on the foreground color.</span></div>
|
|
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span><span class="comment">/// @param gradient The gradient effect to be applied on the output element.</span></div>
|
|
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span><span class="comment">/// @return The Decorator applying the color.</span></div>
|
|
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"> 269</span><span class="comment">/// @ingroup dom</span></div>
|
|
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span><span class="comment">///</span></div>
|
|
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span><span class="comment">/// ### Example</span></div>
|
|
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"> 272</span><span class="comment">///</span></div>
|
|
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span><span class="comment">/// ```cpp</span></div>
|
|
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno"> 274</span><span class="comment">/// text("Hello") | color(LinearGradient{0, {Color::Red, Color::Blue}})</span></div>
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<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"> 275</span><span class="comment">/// ```</span></div>
|
|
<div class="foldopen" id="foldopen00276" data-start="{" data-end="}">
|
|
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno"><a class="line" href="group__dom.html#ga8af6b5a06b03fd53bf30a6b050b96968"> 276</a></span><span class="comment"></span><a class="code hl_typedef" href="namespaceftxui.html#a164021903e9ac6f1357e4186582891e3">Decorator</a> <a class="code hl_function" href="group__dom.html#gaf61b489da39ca5e24b68e6e1a2b09c0d">color</a>(<span class="keyword">const</span> <a class="code hl_struct" href="group__dom.html#structftxui_1_1LinearGradient">LinearGradient</a>& gradient) {</div>
|
|
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span> <span class="keywordflow">return</span></div>
|
|
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span> [gradient](<a class="code hl_typedef" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">Element</a> child) { <span class="keywordflow">return</span> <a class="code hl_function" href="group__dom.html#gaf61b489da39ca5e24b68e6e1a2b09c0d">color</a>(gradient, std::move(child)); };</div>
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|
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"> 279</span>}</div>
|
|
</div>
|
|
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span><span class="comment"></span> </div>
|
|
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span><span class="comment">/// @brief Decorate using a linear-gradient effect on the background color.</span></div>
|
|
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span><span class="comment">/// @param gradient The gradient effect to be applied on the output element.</span></div>
|
|
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span><span class="comment">/// @return The Decorator applying the color.</span></div>
|
|
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span><span class="comment">/// @ingroup dom</span></div>
|
|
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span><span class="comment">///</span></div>
|
|
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span><span class="comment">/// ### Example</span></div>
|
|
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span><span class="comment">///</span></div>
|
|
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span><span class="comment">/// ```cpp</span></div>
|
|
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span><span class="comment">/// text("Hello") | color(LinearGradient{0, {Color::Red, Color::Blue}})</span></div>
|
|
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span><span class="comment">/// ```</span></div>
|
|
<div class="foldopen" id="foldopen00291" data-start="{" data-end="}">
|
|
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"><a class="line" href="group__dom.html#gaee41f3eaff28a123214e81231f8f4593"> 291</a></span><span class="comment"></span><a class="code hl_typedef" href="namespaceftxui.html#a164021903e9ac6f1357e4186582891e3">Decorator</a> <a class="code hl_function" href="group__dom.html#ga01d4c5aaf0447e862246849111782245">bgcolor</a>(<span class="keyword">const</span> <a class="code hl_struct" href="group__dom.html#structftxui_1_1LinearGradient">LinearGradient</a>& gradient) {</div>
|
|
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span> <span class="keywordflow">return</span></div>
|
|
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span> [gradient](<a class="code hl_typedef" href="namespaceftxui.html#a2bc31f2d685189e5c61d2293a1f51b4f">Element</a> child) { <span class="keywordflow">return</span> <a class="code hl_function" href="group__dom.html#ga01d4c5aaf0447e862246849111782245">bgcolor</a>(gradient, std::move(child)); };</div>
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|
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"> 294</span>}</div>
|
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</div>
|
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<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span> </div>
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<div class="line"><a id="l00296" name="l00296"></a><span class="lineno"> 296</span>} <span class="comment">// namespace ftxui</span></div>
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<div class="ttc" id="abox_8hpp_html"><div class="ttname"><a href="box_8hpp.html">box.hpp</a></div></div>
|
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<div class="ttc" id="acolor_8hpp_html"><div class="ttname"><a href="color_8hpp.html">color.hpp</a></div></div>
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<div class="ttc" id="aelements_8hpp_html"><div class="ttname"><a href="elements_8hpp.html">elements.hpp</a></div></div>
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<div class="ttc" id="agroup__dom_html_a03b10012f78e1c731616ce760d28df40"><div class="ttname"><a href="group__dom.html#a03b10012f78e1c731616ce760d28df40">ftxui::LinearGradient::Stop</a></div><div class="ttdeci">LinearGradient & Stop(Color color, float position)</div><div class="ttdoc">Add a color stop to the gradient.</div><div class="ttdef"><b>Definition</b> <a href="#l00220">src/ftxui/dom/linear_gradient.cpp:220</a></div></div>
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<div class="ttc" id="agroup__dom_html_a251d447c54f49914a2cbf5dc16fc8b5b"><div class="ttname"><a href="group__dom.html#a251d447c54f49914a2cbf5dc16fc8b5b">ftxui::LinearGradient::Angle</a></div><div class="ttdeci">LinearGradient & Angle(float angle)</div><div class="ttdoc">Set the angle of the gradient.</div><div class="ttdef"><b>Definition</b> <a href="#l00212">src/ftxui/dom/linear_gradient.cpp:212</a></div></div>
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<div class="ttc" id="agroup__dom_html_a5e989e4841fbba91e1714f977c5c58b9"><div class="ttname"><a href="group__dom.html#a5e989e4841fbba91e1714f977c5c58b9">ftxui::LinearGradient::LinearGradient</a></div><div class="ttdeci">LinearGradient()</div><div class="ttdoc">Build the "empty" gradient. This is often followed by calls to LinearGradient::Angle() and LinearGrad...</div></div>
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<div class="ttc" id="agroup__dom_html_a9c56e5fb8075d8a48b1b0c3b4ea31831"><div class="ttname"><a href="group__dom.html#a9c56e5fb8075d8a48b1b0c3b4ea31831">ftxui::LinearGradient::stops</a></div><div class="ttdeci">std::vector< Stop > stops</div><div class="ttdef"><b>Definition</b> <a href="linear__gradient_8hpp_source.html#l00043">linear_gradient.hpp:43</a></div></div>
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<div class="ttc" id="agroup__dom_html_ab35030b64136afa183d474d11bd1f6dd"><div class="ttname"><a href="group__dom.html#ab35030b64136afa183d474d11bd1f6dd">ftxui::Node::Render</a></div><div class="ttdeci">friend void Render(Screen &screen, Node *node, Selection &selection)</div><div class="ttdef"><b>Definition</b> <a href="node_8cpp_source.html#l00096">node.cpp:96</a></div></div>
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<div class="ttc" id="agroup__dom_html_ab8ef1bf8a70cc07c6d55823c390a7e76"><div class="ttname"><a href="group__dom.html#ab8ef1bf8a70cc07c6d55823c390a7e76">ftxui::LinearGradient::angle</a></div><div class="ttdeci">float angle</div><div class="ttdef"><b>Definition</b> <a href="linear__gradient_8hpp_source.html#l00033">linear_gradient.hpp:33</a></div></div>
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<div class="ttc" id="agroup__dom_html_ga01d4c5aaf0447e862246849111782245"><div class="ttname"><a href="group__dom.html#ga01d4c5aaf0447e862246849111782245">ftxui::bgcolor</a></div><div class="ttdeci">Decorator bgcolor(Color)</div><div class="ttdoc">Decorate using a background color.</div><div class="ttdef"><b>Definition</b> <a href="dom_2color_8cpp_source.html#l00124">dom/color.cpp:124</a></div></div>
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<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 &screen, const Element &element)</div><div class="ttdoc">Display an element on a ftxui::Screen.</div><div class="ttdef"><b>Definition</b> <a href="node_8cpp_source.html#l00084">node.cpp:84</a></div></div>
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<div class="ttc" id="agroup__dom_html_gaf61b489da39ca5e24b68e6e1a2b09c0d"><div class="ttname"><a href="group__dom.html#gaf61b489da39ca5e24b68e6e1a2b09c0d">ftxui::color</a></div><div class="ttdeci">Decorator color(Color)</div><div class="ttdoc">Decorate using a foreground color.</div><div class="ttdef"><b>Definition</b> <a href="dom_2color_8cpp_source.html#l00110">dom/color.cpp:110</a></div></div>
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<div class="ttc" id="agroup__dom_html_structftxui_1_1LinearGradient"><div class="ttname"><a href="group__dom.html#structftxui_1_1LinearGradient">ftxui::LinearGradient</a></div><div class="ttdoc">A class representing the settings for linear-gradient color effect.</div><div class="ttdef"><b>Definition</b> <a href="linear__gradient_8hpp_source.html#l00032">linear_gradient.hpp:32</a></div></div>
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<div class="ttc" id="agroup__screen_html_aa4be56f94fc180d7b070df23c235b0c7a79935518a3889663d8688b6b01fff051"><div class="ttname"><a href="group__screen.html#aa4be56f94fc180d7b070df23c235b0c7a79935518a3889663d8688b6b01fff051">ftxui::Color::Default</a></div><div class="ttdeci">@ Default</div><div class="ttdef"><b>Definition</b> <a href="color_8hpp_source.html#l00050">color.hpp:50</a></div></div>
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<div class="ttc" id="agroup__screen_html_ae5d82c5fbae4f6561c9471c11c0a461b"><div class="ttname"><a href="group__screen.html#ae5d82c5fbae4f6561c9471c11c0a461b">ftxui::Color::Interpolate</a></div><div class="ttdeci">static Color Interpolate(float t, const Color &a, const Color &b)</div><div class="ttdef"><b>Definition</b> <a href="screen_2color_8cpp_source.html#l00203">screen/color.cpp:203</a></div></div>
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<div class="ttc" id="agroup__screen_html_classftxui_1_1Color"><div class="ttname"><a href="group__screen.html#classftxui_1_1Color">ftxui::Color</a></div><div class="ttdoc">Color is a class that represents a color in the terminal user interface.</div><div class="ttdef"><b>Definition</b> <a href="color_8hpp_source.html#l00022">color.hpp:22</a></div></div>
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<div class="ttc" id="agroup__screen_html_gab87bacfdad76e61b9412d7124be44c1c"><div class="ttname"><a href="group__screen.html#gab87bacfdad76e61b9412d7124be44c1c">ftxui::Terminal::Color</a></div><div class="ttdeci">Color</div><div class="ttdoc">Color is an enumeration that represents the color support of the terminal.</div><div class="ttdef"><b>Definition</b> <a href="terminal_8hpp_source.html#l00023">terminal.hpp:23</a></div></div>
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<div class="ttc" id="alinear__gradient_8hpp_html"><div class="ttname"><a href="linear__gradient_8hpp.html">linear_gradient.hpp</a></div></div>
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<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>
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<div class="ttc" id="anamespaceftxui_html_a164021903e9ac6f1357e4186582891e3"><div class="ttname"><a href="namespaceftxui.html#a164021903e9ac6f1357e4186582891e3">ftxui::Decorator</a></div><div class="ttdeci">std::function< Element(Element)> Decorator</div><div class="ttdef"><b>Definition</b> <a href="elements_8hpp_source.html#l00024">elements.hpp:24</a></div></div>
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<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< Node > 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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<div class="ttc" id="anode__decorator_8hpp_html"><div class="ttname"><a href="node__decorator_8hpp.html">node_decorator.hpp</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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<div class="ttc" id="asrc_2ftxui_2dom_2linear__gradient_8cpp_html_ab8ef1bf8a70cc07c6d55823c390a7e76"><div class="ttname"><a href="src_2ftxui_2dom_2linear__gradient_8cpp.html#ab8ef1bf8a70cc07c6d55823c390a7e76">angle</a></div><div class="ttdeci">float angle</div><div class="ttdef"><b>Definition</b> <a href="#l00023">src/ftxui/dom/linear_gradient.cpp:23</a></div></div>
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<div class="ttc" id="asrc_2ftxui_2dom_2linear__gradient_8cpp_html_ac3290ba0758760ac0d6df01f7707dd94"><div class="ttname"><a href="src_2ftxui_2dom_2linear__gradient_8cpp.html#ac3290ba0758760ac0d6df01f7707dd94">colors</a></div><div class="ttdeci">std::vector< Color > colors</div><div class="ttdef"><b>Definition</b> <a href="#l00024">src/ftxui/dom/linear_gradient.cpp:24</a></div></div>
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<div class="ttc" id="asrc_2ftxui_2dom_2linear__gradient_8cpp_html_af3fd42b7427cb742f96e7ec3244fb7cf"><div class="ttname"><a href="src_2ftxui_2dom_2linear__gradient_8cpp.html#af3fd42b7427cb742f96e7ec3244fb7cf">positions</a></div><div class="ttdeci">std::vector< float > positions</div><div class="ttdef"><b>Definition</b> <a href="#l00025">src/ftxui/dom/linear_gradient.cpp:25</a></div></div>
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