Feature: Canvas (#287)

Draw using braille and block characters on a grid.

examples/dom/flexbox.cpp

@@ -0,0 +1,38 @@
+#include <stddef.h>                // for size_t
+#include <stdio.h>                 // for getchar
+#include <ftxui/dom/elements.hpp>  // for operator|, size, Element, text, hcenter, Decorator, Fit, WIDTH, hflow, window, EQUAL, GREATER_THAN, HEIGHT, bold, border, dim, LESS_THAN
+#include <ftxui/screen/screen.hpp>  // for Full, Screen
+#include <memory>                   // for allocator, shared_ptr
+#include <string>  // for operator+, to_string, char_traits, string
+
+#include "ftxui/dom/flexbox_config.hpp"  // for ftxui
+#include "ftxui/dom/node.hpp"            // for Render
+
+int main(int argc, const char* argv[]) {
+  using namespace ftxui;
+
+  auto image = Canvas(100, 100);
+
+  auto document = vbox({
+    make_box("header"),
+    hbox({
+      make_box("left side"),
+      make_box("center") | flex,
+      make_box("right side"),
+    }) | flex,
+    make_box("footer")
+  });
+
+  //auto screen = Screen::Create(Dimension::Full(), Dimension::Fit(document));
+  //auto screen = Screen::Create(Dimension::Fit(document));
+  auto screen = Screen::Create(Dimension::Full());
+  Render(screen, document);
+  screen.Print();
+  getchar();
+
+  return 0;
+}
+
+// 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.