Add gauge and frame.

examples/gauge/main.cpp

@@ -1,30 +1,22 @@
+#include <chrono>
+#include <iostream>
+#include <thread>
+
 #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());
+  for(float percentage = 0; percentage <= 1.0; percentage+=0.001) {
+    using namespace ftxui::dom;
+    auto document =
+        hbox(text(L"gauge = -"), flex(gauge(percentage)), text(L"-"));
+    auto screen = ftxui::Screen(100, 1);
+    Render(screen, document.get());
+    std::cout << '\r' << screen.ToString() << std::flush;
 
-  std::cout << screen.ToString();
-
-  getchar();
-
-  return 0;
+    using namespace std::chrono_literals;
+    std::this_thread::sleep_for(0.01s);
+  }
+  std::cout << std::endl;
 }