Add Event.

examples/input/CMakeLists.txt

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

examples/input/main.cpp

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+#include <chrono>
+#include <iostream>
+#include <thread>
+
+#include "ftxui/screen_interactive.hpp"
+#include "ftxui/component/input.hpp"
+#include "ftxui/component/component_vertical.hpp"
+#include "ftxui/util/string.hpp"
+
+using namespace ftxui::component;
+using namespace ftxui::dom;
+
+class MyComponent : ComponentVertical {
+ public:
+  MyComponent(ftxui::component::Delegate* delegate)
+      : ComponentVertical(delegate),
+        input_1(delegate->NewChild()),
+        input_2(delegate->NewChild()),
+        input_3(delegate->NewChild()) {
+    Focus(&input_1);
+  }
+
+  std::function<void()> on_enter = []() {};
+
+ private:
+  Input input_1;
+  Input input_2;
+  Input input_3;
+
+  Element Render() override {
+    return
+      frame(
+        vbox(
+          hbox(text(L" input_1 : "), input_1.Render()),
+          hbox(text(L" input_2 : "), input_2.Render()),
+          hbox(text(L" input_3 : "), input_3.Render())
+        )
+      );
+  }
+};
+
+int main(int argc, const char* argv[]) {
+  ftxui::ScreenInteractive screen(60, 17);
+  MyComponent component(screen.delegate());
+  component.on_enter = screen.ExitLoopClosure();
+  screen.Loop();
+}