Start the gauge widget.

examples/gauge/CMakeLists.txt

@@ -0,0 +1,4 @@
+add_executable(gauge_example
+  main.cpp
+)
+target_link_libraries(gauge_example PRIVATE ftxui)

examples/gauge/main.cpp

@@ -0,0 +1,30 @@
+#include "ftxui/core/screen.hpp"
+#include "ftxui/core/dom/elements.hpp"
+#include <iostream>
+
+int main(int argc, const char *argv[])
+{
+  using namespace ftxui::dom;
+  auto document =
+    hbox(
+      flex(vbox(
+        gauge(0.1),
+        gauge(0.2),
+        gauge(0.3)
+      )),
+      flex(vbox(
+        gauge(0.1),
+        gauge(0.8),
+        gauge(0.3)
+      ))
+    );
+  //auto screen = ftxui::Screen::WholeTerminal();
+  auto screen = ftxui::Screen::TerminalOutput(document);
+  Render(screen, document.get());
+
+  std::cout << screen.ToString();
+
+  getchar();
+
+  return 0;
+}