Make ui::TitleView use ui::Transition for scrolling.

include/ui/TitleView.hpp

@@ -5,6 +5,7 @@
 #include "ui/ColorMod.hpp"
 #include "ui/Element.hpp"
 #include "ui/TitleTile.hpp"
+#include "ui/Transition.hpp"
 
 #include <vector>
 
@@ -49,8 +50,8 @@ namespace ui
             /// @brief Pointer to user passed.
             data::User *m_user{};
 
-            /// @brief Y coordinate.
-            double m_y = 32.0f;
+            /// @brief Transition used for animating the scrolling.
+            ui::Transition m_transition{};
 
             /// @brief Currently highlighted/selected title.
             int m_selected{};

include/ui/Transition.hpp

@@ -99,7 +99,10 @@ namespace ui
             /// @brief Sets the threshold before snapping occurs.
             void set_threshold(int threshold) noexcept;
 
-            static inline int DEFAULT_THRESHOLD = 2;
+            /// @brief Updates the scaling for all transitions.
+            static void update_scaling() noexcept;
+
+            static inline int DEFAULT_THRESHOLD = 1;
 
         private:
             /// @brief Current X.
@@ -130,7 +133,7 @@ namespace ui
             double m_threshold{};
 
             /// @brief Scaling from config.
-            double m_scaling{};
+            static inline double sm_scaling{};
 
             void update_x_coord() noexcept;