Initialize

ftxui/examples/dom/canvas.cpp

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+// 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 <stdio.h>                 // for getchar
+#include <cmath>                   // for cos
+#include <ftxui/dom/elements.hpp>  // for Fit, canvas, operator|, border, Element
+#include <ftxui/screen/screen.hpp>  // for Pixel, Screen
+#include <vector>                   // for vector, allocator
+
+#include "ftxui/dom/canvas.hpp"  // for Canvas
+#include "ftxui/dom/node.hpp"    // for Render
+#include "ftxui/screen/color.hpp"  // for Color, Color::Red, Color::Blue, Color::Green, ftxui
+
+int main() {
+  using namespace ftxui;
+
+  auto c = Canvas(100, 100);
+
+  c.DrawText(0, 0, "This is a canvas", [](Pixel& p) {
+    p.foreground_color = Color::Red;
+    p.underlined = true;
+  });
+
+  // Triangle:
+  c.DrawPointLine(10, 10, 80, 10, Color::Red);
+  c.DrawPointLine(80, 10, 80, 40, Color::Blue);
+  c.DrawPointLine(80, 40, 10, 10, Color::Green);
+
+  // Circle, not filled and filled:
+  c.DrawPointCircle(30, 50, 20);
+  c.DrawPointCircleFilled(40, 40, 10);
+
+  // Plot a function:
+  std::vector<int> ys(100);
+  for (int x = 0; x < 100; x++) {
+    ys[x] = int(80 + 20 * cos(x * 0.2));
+  }
+  for (int x = 0; x < 99; x++) {
+    c.DrawPointLine(x, ys[x], x + 1, ys[x + 1], Color::Red);
+  }
+
+  auto document = canvas(&c) | border;
+
+  auto screen = Screen::Create(Dimension::Fit(document));
+  Render(screen, document);
+  screen.Print();
+  getchar();
+
+  return 0;
+}