Add RadioBox.

examples/component/CMakeLists.txt

@@ -4,12 +4,13 @@ function(example name)
   target_link_libraries(${name} PUBLIC component)
 endfunction(example)
 
+example(checkbox)
 example(gallery)
 example(input)
 example(menu)
 example(menu2)
 example(menu_style)
-example(toggle)
+example(radiobox)
 example(tab_horizontal)
 example(tab_vertical)
-example(checkbox)
+example(toggle)

examples/component/checkbox.cpp

@@ -20,11 +20,21 @@ class MyComponent : public Component {
       box_1_.label = L"Build examples";
       box_2_.label = L"Build tests";
       box_3_.label = L"Use WebAssembly";
+      box_3_.state = true;
+    }
+
+    Element Render() {
+      return
+        window(text(L" Checkbox "),
+          hbox(
+            container_.Render()
+          )
+        );
     }
 };
 
 int main(int argc, const char *argv[]) {
-  auto screen = ScreenInteractive::TerminalOutput();
+  auto screen = ScreenInteractive::FixedSize(30,5);
   MyComponent component;
   screen.Loop(&component);
   return 0;

examples/component/radiobox.cpp

@@ -0,0 +1,19 @@
+#include "ftxui/component/radiobox.hpp"
+#include "ftxui/component/component.hpp"
+#include "ftxui/component/container.hpp"
+#include "ftxui/component/screen_interactive.hpp"
+
+using namespace ftxui;
+
+int main(int argc, const char* argv[]) {
+  auto screen = ScreenInteractive::TerminalOutput();
+  RadioBox radiobox;
+  radiobox.entries = {
+      L"Use gcc",
+      L"Use clang",
+      L"Use emscripten",
+      L"Use tcc",
+  };
+  screen.Loop(&radiobox);
+  return 0;
+}

examples/component/tab_horizontal.cpp

@@ -2,7 +2,7 @@
 #include <thread>
 
 #include "ftxui/component/container.hpp"
-#include "ftxui/component/menu.hpp"
+#include "ftxui/component/radiobox.hpp"
 #include "ftxui/component/screen_interactive.hpp"
 #include "ftxui/component/toggle.hpp"
 #include "ftxui/screen/string.hpp"
@@ -10,55 +10,59 @@
 using namespace ftxui;
 
 class MyComponent : public Component {
-  public:
-   MyComponent() {
-     Add(&container_);
-     container_.Add(&toggle_);
+ public:
+  MyComponent() {
+    Add(&container_);
+    container_.Add(&toggle_);
 
-     toggle_.entries = {
-       L"menu_1",
-       L"menu_2",
-       L"menu_3",
-     };
+    toggle_.entries = {
+        L"tab_1",
+        L"tab_2",
+        L"tab_3",
+    };
 
-     container_.Add(&tab_container_);
-    
-     menu_1_.entries = {
-       L"Forest",
-       L"Water",
-       L"I don't know"
-     };
-     tab_container_.Add(&menu_1_);
+    container_.Add(&tab_container_);
 
-     menu_2_.entries = {
-       L"Hello",
-       L"Hi",
-       L"Hay",
-     };
-     tab_container_.Add(&menu_2_);
+    radiobox_1_.entries = {L"Forest", L"Water", L"I don't know"};
+    tab_container_.Add(&radiobox_1_);
 
-     menu_3_.entries = {
-       L"Table",
-       L"Nothing",
-       L"Is",
-       L"Empty",
-     };
-     tab_container_.Add(&menu_3_);
-   }
+    radiobox_2_.entries = {
+        L"Hello",
+        L"Hi",
+        L"Hay",
+    };
+    tab_container_.Add(&radiobox_2_);
 
-   std::function<void()> on_enter = [](){};
-  private:
-   Toggle toggle_;
-   Container container_ = Container::Vertical();
-   Container tab_container_ = Container::Tab(&(toggle_.selected));
-   Menu menu_1_;
-   Menu menu_2_;
-   Menu menu_3_;
+    radiobox_3_.entries = {
+        L"Table",
+        L"Nothing",
+        L"Is",
+        L"Empty",
+    };
+    tab_container_.Add(&radiobox_3_);
+  }
+
+  std::function<void()> on_enter = []() {};
+
+  Element Render(){
+    return
+      vbox(
+        toggle_.Render(),
+        separator(),
+        tab_container_.Render()
+      ) | frame;
+  }
+
+ private:
+  Toggle toggle_;
+  Container container_ = Container::Vertical();
+  Container tab_container_ = Container::Tab(&(toggle_.selected));
+  RadioBox radiobox_1_;
+  RadioBox radiobox_2_;
+  RadioBox radiobox_3_;
 };
 
- 
-int main(int argc, const char *argv[])
-{
+int main(int argc, const char* argv[]) {
   auto screen = ScreenInteractive::TerminalOutput();
   MyComponent component;
   component.on_enter = screen.ExitLoopClosure();

ftxui/CMakeLists.txt

@@ -36,6 +36,7 @@ add_library(component
   src/ftxui/component/event.cpp
   src/ftxui/component/input.cpp
   src/ftxui/component/menu.cpp
+  src/ftxui/component/radiobox.cpp
   src/ftxui/component/screen_interactive.cpp
   src/ftxui/component/toggle.cpp
 )

ftxui/include/ftxui/component/checkbox.hpp

@@ -15,8 +15,10 @@ class CheckBox : public Component {
   bool state = false;
   std::wstring label = L"label";
 
-  std::wstring checked = L"[X] ";
-  std::wstring unchecked = L"[ ] ";
+  //std::wstring checked = L"[X] ";
+  //std::wstring unchecked = L"[ ] ";
+  std::wstring checked = L"☑ ";
+  std::wstring unchecked = L"☐ ";
 
   // State update callback.
   std::function<void()> on_change = [](){};

ftxui/include/ftxui/component/radiobox.hpp

@@ -0,0 +1,38 @@
+#ifndef FTXUI_COMPONENT_RADIOBOX_HPP
+#define FTXUI_COMPONENT_RADIOBOX_HPP
+
+#include "ftxui/component/component.hpp"
+#include <functional>
+
+namespace ftxui {
+
+class RadioBox : public Component {
+ public:
+  // Constructor.
+  RadioBox() = default;
+  ~RadioBox() override = default;
+
+  int selected = 0;
+  int focused = 0;
+  std::vector<std::wstring> entries;
+
+  std::wstring checked = L"◉ ";
+  std::wstring unchecked = L"○ ";
+
+  Decorator focused_style = inverted;
+  Decorator unfocused_style = nothing;
+
+  // State update callback.
+  std::function<void()> on_change = [](){};
+
+  // Component implementation.
+  Element Render() override;
+  bool OnEvent(Event) override;
+
+ private:
+  int cursor_position = 0;
+};
+
+}  // namespace ftxui
+
+#endif /* end of include guard: FTXUI_COMPONENT_RADIOBOX_HPP */

ftxui/src/ftxui/component/radiobox.cpp

@@ -0,0 +1,41 @@
+#include "ftxui/component/radiobox.hpp"
+#include <functional>
+
+namespace ftxui {
+
+Element RadioBox::Render() {
+  std::vector<Element> elements;
+  bool is_focused = Focused();
+  for (size_t i = 0; i < entries.size(); ++i) {
+    auto style =
+        (focused == int(i) && is_focused) ? focused_style : unfocused_style;
+    const std::wstring& symbol = selected == int(i) ? checked : unchecked;
+    elements.push_back(hbox(text(symbol), text(entries[i]) | style));
+  }
+  return vbox(std::move(elements));
+}
+
+bool RadioBox::OnEvent(Event event) {
+  if (!Focused())
+    return false;
+
+  int new_focused = focused;
+  if (event == Event::ArrowUp || event == Event::Character('k'))
+    new_focused--;
+  if (event == Event::ArrowDown || event == Event::Character('j'))
+    new_focused++;
+  new_focused = std::max(0, std::min(int(entries.size()) - 1, new_focused));
+  if (focused != new_focused) {
+    focused = new_focused;
+    return true;
+  }
+
+  if (event == Event::Character(' ')) {
+    selected = focused;
+    on_change();
+  }
+
+  return false;
+}
+
+}  // namespace ftxui