We have a basic decorator

CMakeLists.txt

@@ -88,6 +88,7 @@ add_library(dom
   src/ftxui/dom/paragraph.cpp
   src/ftxui/dom/reflect.cpp
   src/ftxui/dom/scroll_indicator.cpp
+  src/ftxui/dom/selectable.cpp
   src/ftxui/dom/separator.cpp
   src/ftxui/dom/size.cpp
   src/ftxui/dom/spinner.cpp

examples/component/CMakeLists.txt

@@ -38,6 +38,7 @@ example(radiobox)
 example(radiobox_in_frame)
 example(renderer)
 example(resizable_split)
+example(selectable_input)
 example(scrollbar)
 example(slider)
 example(slider_direction)

examples/component/selectable_input.cpp

@@ -0,0 +1,80 @@
+// 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.
+#include <memory>  // for allocator, __shared_ptr_access
+#include <string>  // for char_traits, operator+, string, basic_string
+
+#include "ftxui/component/captured_mouse.hpp"  // for ftxui
+#include "ftxui/component/component.hpp"       // for Input, Renderer, Vertical
+#include "ftxui/component/component_base.hpp"  // for ComponentBase
+#include "ftxui/component/component_options.hpp"  // for InputOption
+#include "ftxui/component/screen_interactive.hpp"  // for Component, ScreenInteractive
+#include "ftxui/dom/elements.hpp"  // for text, hbox, separator, Element, operator|, vbox, border
+#include "ftxui/util/ref.hpp"  // for Ref
+
+
+int main() {
+  using namespace ftxui;
+
+  // The data:
+  std::string first_name;
+  std::string last_name;
+  std::string password;
+  std::string phoneNumber;
+  // Region selection;
+  std::string textToCopy;
+
+  auto screen = ScreenInteractive::TerminalOutput();
+
+  // The basic input components:
+  Component input_first_name = Input(&first_name, "first name");
+  Component input_last_name = Input(&last_name, "last name");
+
+  // The password input component:
+  InputOption password_option;
+  password_option.password = true;
+  Component input_password = Input(&password, "password", password_option);
+
+  // The phone number input component:
+  // We are using `CatchEvent` to filter out non-digit characters.
+  Component input_phone_number = Input(&phoneNumber, "phone number");
+  input_phone_number |= CatchEvent([&](Event event) {
+    return event.is_character() && !std::isdigit(event.character()[0]);
+  });
+  input_phone_number |= CatchEvent([&](Event event) {
+    return event.is_character() && phoneNumber.size() > 10;
+  });
+
+  // The component tree:
+  auto component = Container::Vertical({
+      input_first_name,
+      input_last_name,
+      input_password,
+      input_phone_number,
+  });
+
+  // Tweak how the component tree is rendered:
+  auto renderer = Renderer(component, [&] {
+    return vbox({
+               hbox(text(" First name : "), input_first_name->Render()),
+               hbox(text(" Last name  : ") | selectable(), input_last_name->Render()),
+               hbox(text(" Password   : "), input_password->Render()),
+               hbox(text(" Phone num  : "), input_phone_number->Render()),
+               separator(),
+               text("Hello " + first_name + " " + last_name),
+               text("Your password is " + password),
+               text("Your phone number is " + phoneNumber),
+              //  text("select_start " + std::to_string(selection.startx) + ";" + std::to_string(selection.starty)),
+              //  text("select_end " + std::to_string(selection.endx) + ";" + std::to_string(selection.endy)),
+               text("textToCopy " + textToCopy)
+           }) |
+           border;    // | selectable([&textToCopy](std::string txtSelected){textToCopy = txtSelected;})
+  });
+
+  // renderer |= CatchEvent([&](Event event) { 
+
+  //   return selectableCatchEvent(event);    
+  // });
+
+  screen.Loop(renderer);
+}

include/ftxui/dom/elements.hpp

@@ -113,6 +113,8 @@ Decorator focusPositionRelative(float x, float y);
 Element automerge(Element child);
 Decorator hyperlink(std::string link);
 Element hyperlink(std::string link, Element child);
+Element selectable(Element child);
+Decorator selectable(void);
 
 // --- Layout is
 // Horizontal, Vertical or stacked set of elements.

src/ftxui/dom/selectable.cpp

@@ -0,0 +1,39 @@
+#include "ftxui/dom/elements.hpp"  // for Element, Decorator
+#include "ftxui/dom/node_decorator.hpp"  // for NodeDecorator
+
+
+
+namespace ftxui {
+namespace {
+
+class Selectable : public NodeDecorator {
+ public:
+  explicit Selectable(Element child)
+      : NodeDecorator(std::move(child)) {}
+
+ private:
+  void Render(Screen& screen) override {
+
+    for (int y = box_.y_min; y <= box_.y_max; ++y) {
+        for (int x = box_.x_min; x <= box_.x_max; ++x) {
+            screen.PixelAt(x, y).inverted = true;
+        }
+    }
+
+    NodeDecorator::Render(screen);
+  }
+};
+
+}  // namespace
+
+
+Element selectable(Element child) {
+  return std::make_shared<Selectable>(std::move(child));
+}
+
+Decorator selectable(void) {
+  return
+      [](Element child) { return selectable(std::move(child)); };
+}
+
+}  // namespace ftxui