Add virtual function to process mouse_event

(cherry picked from commit prusa3d/PrusaSlicer@2ab44546bd)

src/slic3r/GUI/Gizmos/GLGizmoBase.hpp

@@ -152,7 +152,7 @@ public:
     GLGizmoBase(GLCanvas3D& parent,
                 const std::string& icon_filename,
                 unsigned int sprite_id);
-    virtual ~GLGizmoBase() {}
+    virtual ~GLGizmoBase() = default;
 
     bool init() { return on_init(); }
 
@@ -213,6 +213,14 @@ public:
     int get_count() { return ++count; }
     std::string get_gizmo_name() { return on_get_name(); }
 
+    /// <summary>
+    /// Implement when want to process mouse events in gizmo
+    /// Click, Right click, move, drag, ...
+    /// </summary>
+    /// <param name="mouse_event">Keep information about mouse click</param>
+    /// <returns>Return True when use the information and don't want to propagate it otherwise False.</returns>
+    virtual bool on_mouse(const wxMouseEvent &mouse_event) { return false; }
+
     void register_raycasters_for_picking()   { register_grabbers_for_picking(); on_register_raycasters_for_picking(); }
     void unregister_raycasters_for_picking() { unregister_grabbers_for_picking(); on_unregister_raycasters_for_picking(); }