add wrap-around option to the menu

main/scenes/scene_manual_menu.c

@@ -104,6 +104,7 @@ struct Scene *NewScene_MenuTest() {
     scene->base.paint = (Scene_paint_t) paint;
     scene->extra = priv;
     scene->extra_deinit = (Scene_deinit_t) priv_deinit;
+    scene->wraparound = true;
 
     // add a child return handler (base does not use this)
     scene->base.onChildReturn = (Scene_onChildReturn_t) onChildReturn;

main/scenes/scene_menu.c

@@ -57,10 +57,18 @@ static struct SceneEvent onInput(struct MenuScene *self, struct InputEvent event
         case InputEventKind_Wheel:;
             self->selected += event.wheel.direction;
             if (self->selected < 0) {
-                self->selected = 0;
+                if (self->wraparound) {
+                    self->selected = self->items_len - 1;
+                } else {
+                    self->selected = 0;
+                }
             }
             else if (self->selected >= self->items_len) {
-                self->selected = self->items_len - 1;
+                if (self->wraparound) {
+                    self->selected = 0;
+                } else {
+                    self->selected = self->items_len - 1;
+                }
             }
 
             // hacky scroll adjust

main/scenes/scene_menu.h

@@ -8,6 +8,7 @@
 #define REFLOWER_SCENE_MENU_H
 
 #include <stdint.h>
+#include <stdbool.h>
 #include <stddef.h>
 
 #define MENUITEM_LABEL_LEN 30
@@ -38,10 +39,10 @@ struct MenuScene {
     struct Scene base;
     // items array
     struct MenuItem *items;
+    // allow wrap-around
+    bool wraparound;
     // items count
     size_t items_len;
-    // number of visible characters in a line at a time
-    uint8_t ncols;
     // Vertical scroll offset (how many steps is the topmost item moved above the screen)
     int32_t scroll_up;
     // Start X
@@ -56,6 +57,8 @@ struct MenuScene {
     int32_t hscroll_cnt;
     // Number of lines visible at a time
     uint8_t nlines;
+    // number of visible characters in a line at a time
+    uint8_t ncols;
     // selection handler
     MenuScene_onSelect_t onSelect;
     // Extra field for the subclass's private use.