Capture mouse for the slider component.

include/ftxui/component/captured_mouse.hpp

@@ -0,0 +1,14 @@
+#ifndef FTXUI_CAPTURED_MOUSE_HPP
+#define FTXUI_CAPTURED_MOUSE_HPP
+
+#include <memory>
+
+namespace ftxui {
+class CapturedMouseInterface {
+ public:
+  virtual ~CapturedMouseInterface() {}
+};
+using CapturedMouse = std::unique_ptr<CapturedMouseInterface>;
+}  // namespace ftxui
+
+#endif /* end of include guard: FTXUI_CAPTURED_MOUSE_HPP */

include/ftxui/component/component.hpp

@@ -52,13 +52,13 @@ class Component {
   // Configure all the ancestors to give focus to this component.
   void TakeFocus();
 
+ protected:
+  std::vector<Component*> children_;
+
  private:
   Component* parent_ = nullptr;
   void Detach();
   void Attach(Component* parent);
-
- protected:
-  std::vector<Component*> children_;
 };
 
 using ComponentPtr = std::unique_ptr<Component>;

include/ftxui/component/event.hpp

@@ -10,6 +10,8 @@
 
 namespace ftxui {
 
+class ScreenInteractive;
+
 /// @brief Represent an event. It can be key press event, a terminal resize, or
 /// more ...
 ///
@@ -65,6 +67,9 @@ struct Event {
 
   const std::string& input() const { return input_; }
 
+  ScreenInteractive* screen() { return screen_; }
+  void SetScreen(ScreenInteractive* screen) { screen_ = screen; }
+
   bool operator==(const Event& other) const { return input_ == other.input_; }
 
   //--- State section ----------------------------------------------------------
@@ -88,6 +93,8 @@ struct Event {
     struct Cursor cursor_;
   };
   std::string input_;
+
+  ScreenInteractive* screen_;
 };
 
 

include/ftxui/component/screen_interactive.hpp

@@ -9,6 +9,7 @@
 #include <mutex>
 #include <queue>
 
+#include "ftxui/component/captured_mouse.hpp"
 #include "ftxui/component/event.hpp"
 #include "ftxui/screen/screen.hpp"
 
@@ -27,6 +28,7 @@ class ScreenInteractive : public Screen {
   std::function<void()> ExitLoopClosure();
 
   void PostEvent(Event event);
+  CapturedMouse CaptureMouse();
 
  private:
   void Draw(Component* component);
@@ -55,6 +57,8 @@ class ScreenInteractive : public Screen {
 
   int cursor_x_ = 0;
   int cursor_y_ = 0;
+
+  bool mouse_captured = false;
 };
 
 }  // namespace ftxui

include/ftxui/component/slider.hpp

@@ -11,11 +11,14 @@ namespace ftxui {
 // float max = 100.f,
 // float increment = (max - min) * 0.05f);
 
+template<class T> // T = {int, float}
 ComponentPtr Slider(std::wstring label,
-                    int* value,
-                    int min,
-                    int max,
-                    int increment);
+                    T* value,
+                    T min,
+                    T max,
+                    T increment);
+
+
 }  // namespace ftxui
 
 #endif /* end of include guard: FTXUI_COMPONENT_SLIDER_HPP */