menu_animation: add menu_timer system

.vscode/settings.json

@@ -27,7 +27,8 @@
       "menu_driver.h": "c",
       "file_path.h": "c",
       "unordered_map": "c",
-      "unordered_set": "c"
+      "unordered_set": "c",
+      "sstream": "cpp"
    },
    "C_Cpp.dimInactiveRegions": false,
 }

menu/menu_animation.c

@@ -711,3 +711,30 @@ bool menu_animation_ctl(enum menu_animation_ctl_state state, void *data)
 
    return true;
 }
+
+void menu_timer_start(menu_timer_t *timer, menu_timer_ctx_entry_t *timer_entry)
+{
+   menu_animation_ctx_tag tag = (uintptr_t) timer;
+
+   menu_timer_kill(timer);
+
+   *timer = 0.0f;
+
+   menu_animation_ctx_entry_t entry;
+
+   entry.easing_enum    = EASING_LINEAR;
+   entry.tag            = tag;
+   entry.duration       = timer_entry->duration;
+   entry.target_value   = 1.0f;
+   entry.subject        = timer;
+   entry.cb             = timer_entry->cb;
+   entry.userdata       = timer_entry->userdata;
+
+   menu_animation_push(&entry);
+}
+
+void menu_timer_kill(menu_timer_t *timer)
+{
+   menu_animation_ctx_tag tag = (uintptr_t) timer;
+   menu_animation_kill_by_tag(&tag);
+}

menu/menu_animation.h

@@ -118,6 +118,19 @@ typedef struct menu_animation_ctx_ticker
    const char *str;
 } menu_animation_ctx_ticker_t;
 
+typedef float menu_timer_t;
+
+typedef struct menu_timer_ctx_entry
+{
+   float duration;
+   tween_cb cb;
+   void *userdata;
+} menu_timer_ctx_entry_t;
+
+void menu_timer_start(menu_timer_t *timer, menu_timer_ctx_entry_t *timer_entry);
+
+void menu_timer_kill(menu_timer_t *timer);
+
 bool menu_animation_update(float delta_time);
 
 bool menu_animation_get_ideal_delta_time(menu_animation_ctx_delta_t *delta);