examples/dom/color_truecolor_RGB.cpp

// Copyright 2020 Arthur Sonzogni. All rights reserved.
// Use of this source code is governed by the MIT license that can be found in
// the LICENSE file.
#include <ftxui/dom/elements.hpp>  // for hbox, text, bgcolor, operator|, vbox, Elements, window, Element, Fit
#include <ftxui/screen/screen.hpp>  // for Full, Screen
#include <memory>                   // for allocator
#include <utility>                  // for move
 
#include "ftxui/dom/node.hpp"      // for Render
#include "ftxui/screen/color.hpp"  // for Color, ftxui
 
int main() {
  using namespace ftxui;
 
  int saturation = 255;
  Elements red_line;
  Elements green_line;
  Elements blue_line;
  Elements cyan_line;
  Elements magenta_line;
  Elements yellow_line;
 
  for (int value = 0; value < 255; value += 3) {
    int v = value * value / 255;
    red_line.push_back(text(" ") | bgcolor(Color::RGB(v, 0, 0)));
    green_line.push_back(text(" ") | bgcolor(Color::RGB(0, v, 0)));
    blue_line.push_back(text(" ") | bgcolor(Color::RGB(0, 0, v)));
    cyan_line.push_back(text(" ") | bgcolor(Color::RGB(0, v, v)));
    magenta_line.push_back(text(" ") | bgcolor(Color::RGB(v, 0, v)));
    yellow_line.push_back(text(" ") | bgcolor(Color::RGB(v, v, 0)));
  }
 
  auto document = vbox({
      window(text("Primary colors"),
             vbox({
                 hbox({text("Red line    :"), hbox(std::move(red_line))}),
                 hbox({text("Green line  :"), hbox(std::move(green_line))}),
                 hbox({text("Blue line   :"), hbox(std::move(blue_line))}),
             })),
      window(text("Secondary colors"),
             vbox({
                 hbox({text("cyan line   :"), hbox(std::move(cyan_line))}),
                 hbox({text("magenta line:"), hbox(std::move(magenta_line))}),
                 hbox({text("Yellow line :"), hbox(std::move(yellow_line))}),
             })),
  });
 
  auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));
  Render(screen, document);
 
  screen.Print();
 
  return 0;
}