Add mouse implementation of most components.

include/ftxui/component/button.hpp

@@ -25,6 +25,8 @@ class Button : public Component {
   // Component implementation.
   Element Render() override;
   bool OnEvent(Event) override;
+ private:
+  Box box_;
 };
 
 }  // namespace ftxui

include/ftxui/component/checkbox.hpp

@@ -38,7 +38,11 @@ class CheckBox : public Component {
   bool OnEvent(Event) override;
 
  private:
+  bool OnMouseEvent(Event event);
+
   int cursor_position = 0;
+  Box box_;
+
 };
 
 }  // namespace ftxui

include/ftxui/component/container.hpp

@@ -36,6 +36,9 @@ class Container : public Component {
 
   int selected_ = 0;
   int* selector_ = nullptr;
+
+ private:
+  bool OnMouseEvent(Event event);
 };
 
 }  // namespace ftxui

include/ftxui/component/event.hpp

@@ -59,6 +59,7 @@ struct Event {
   bool is_character() const { return type_ == Type::Character;}
   wchar_t character() const { return character_; }
 
+  bool is_mouse() const;
   bool is_mouse_left_down() const { return type_ == Type::MouseLeftDown; }
   bool is_mouse_left_move() const { return type_ == Type::MouseLeftMove; }
   bool is_mouse_middle_down() const { return type_ == Type::MouseMiddleDown; }
@@ -74,6 +75,8 @@ struct Event {
 
   bool operator==(const Event& other) const { return input_ == other.input_; }
 
+  void MoveMouse(int dx, int dy);
+
   //--- State section ----------------------------------------------------------
  private:
   enum class Type {

include/ftxui/component/menu.hpp

@@ -31,6 +31,11 @@ class Menu : public Component {
   // Component implementation.
   Element Render() override;
   bool OnEvent(Event) override;
+
+ private:
+  bool OnMouseEvent(Event);
+
+  std::vector<Box> boxes_;
 };
 
 }  // namespace ftxui

include/ftxui/component/radiobox.hpp

@@ -39,7 +39,9 @@ class RadioBox : public Component {
   bool OnEvent(Event) override;
 
  private:
+  bool OnMouseEvent(Event event);
   int cursor_position = 0;
+  std::vector<Box> boxes_;
 };
 
 }  // namespace ftxui

include/ftxui/component/toggle.hpp

@@ -30,6 +30,10 @@ class Toggle : public Component {
   // Component implementation.
   Element Render() override;
   bool OnEvent(Event) override;
+
+ private:
+  bool OnMouseEvent(Event event);
+  std::vector<Box> boxes_;
 };
 
 }  // namespace ftxui

include/ftxui/dom/elements.hpp

@@ -5,6 +5,7 @@
 #include <memory>
 
 #include "ftxui/dom/node.hpp"
+#include "ftxui/screen/box.hpp"
 #include "ftxui/screen/color.hpp"
 #include "ftxui/screen/screen.hpp"
 
@@ -77,6 +78,9 @@ enum Direction { WIDTH, HEIGHT };
 enum Constraint { LESS_THAN, EQUAL, GREATER_THAN };
 Decorator size(Direction, Constraint, int value);
 
+// -- 
+Decorator reflect(Box& box);
+
 // --- Frame ---
 // A frame is a scrollable area. The internal area is potentially larger than
 // the external one. The internal area is scrolled in order to make visible the

include/ftxui/screen/box.hpp

@@ -10,6 +10,7 @@ struct Box {
   int y_max;
 
   static Box Intersection(Box a, Box b);
+  bool Contain(int x, int y);
 };
 
 }  // namespace ftxui