Add CheckBox.

examples/component/checkbox.cpp

@@ -0,0 +1,31 @@
+#include "ftxui/component/checkbox.hpp"
+#include "ftxui/component/component.hpp"
+#include "ftxui/component/container.hpp"
+#include "ftxui/component/screen_interactive.hpp"
+
+using namespace ftxui;
+
+class MyComponent : public Component {
+  private:
+    CheckBox box_1_;
+    CheckBox box_2_;
+    CheckBox box_3_;
+    Container container_ = Container::Vertical();
+  public:
+    MyComponent() {
+      Add(&container_);
+      container_.Add(&box_1_);
+      container_.Add(&box_2_);
+      container_.Add(&box_3_);
+      box_1_.label = L"Build examples";
+      box_2_.label = L"Build tests";
+      box_3_.label = L"Use WebAssembly";
+    }
+};
+
+int main(int argc, const char *argv[]) {
+  auto screen = ScreenInteractive::TerminalOutput();
+  MyComponent component;
+  screen.Loop(&component);
+  return 0;
+}