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[hackover2013-badge-firmware.git] / badge / ui / menu.c

diff --git a/badge/ui/menu.c b/badge/ui/menu.c
index 79e2e8a..601d159 100644 (file)
--- a/badge/ui/menu.c
+++ b/badge/ui/menu.c
@@ -19,30 +19,36 @@ static badge_sprite const arrows[] = {
 };
 
 enum {
-  MENU_MARGIN_TOP      = 2,
-  MENU_MARGIN_BOTTOM   = 3,
+  MENU_MARGIN_TOP      = 3,
+  MENU_MARGIN_BOTTOM   = 2,
   MENU_MARGIN_LEFT     = 3,
   MENU_ENTRIES_HEIGHT  = 1 + BADGE_FONT_HEIGHT,
   MENU_ENTRIES_VISIBLE = (BADGE_DISPLAY_HEIGHT - MENU_MARGIN_TOP - MENU_MARGIN_BOTTOM) / MENU_ENTRIES_HEIGHT
 };
 
 static void badge_menu_show(char const *const *menu,
-                            size_t n,
-                            size_t *first_visible,
-                            size_t selected,
+                            uint8_t n,
+                            uint8_t *first_visible,
+                            uint8_t selected,
                             char   selector)
 {
   badge_framebuffer fb = { { { 0 } } };
   bool arrow_up   = true;
   bool arrow_down = true;
 
-  size_t first_used_row = 0;
-  size_t used_rows = MENU_ENTRIES_VISIBLE;
+  uint8_t first_used_row = 0;
+  uint8_t used_rows = MENU_ENTRIES_VISIBLE;
+
+  if(selected >= n) {
+    selected = n - 1;
+  }
 
   if(n <= MENU_ENTRIES_VISIBLE) {
     *first_visible = 0;
     used_rows      = n;
     first_used_row = (MENU_ENTRIES_VISIBLE - used_rows) / 2;
+  } else if(*first_visible + MENU_ENTRIES_VISIBLE > n) {
+    *first_visible = n - MENU_ENTRIES_VISIBLE;
   } else if(selected + 1 == n) {
     *first_visible = n - MENU_ENTRIES_VISIBLE;
   } else if(selected <= *first_visible) {
@@ -59,7 +65,7 @@ static void badge_menu_show(char const *const *menu,
     arrow_down = false;
   }
 
-  for(size_t i = 0; i < used_rows; ++i) {
+  for(uint8_t i = 0; i < used_rows; ++i) {
     badge_framebuffer_render_text(&fb,
                                   (int8_t) (MENU_MARGIN_LEFT + BADGE_FONT_WIDTH),
                                   (int8_t) (MENU_MARGIN_TOP  + (first_used_row + i) * MENU_ENTRIES_HEIGHT),
@@ -73,10 +79,10 @@ static void badge_menu_show(char const *const *menu,
   badge_framebuffer_flush(&fb);
 }
 
-size_t badge_menu(char const *const *menu,
-                  size_t  n,
-                  size_t *first_visible,
-                  size_t  selected)
+uint8_t badge_menu(char const *const *menu,
+                  uint8_t  n,
+                  uint8_t *first_visible,
+                  uint8_t  selected)
 {
   unsigned scroll_ticks = 0;
   int scroll_direction = 0;
@@ -126,8 +132,8 @@ size_t badge_menu(char const *const *menu,
   }
 }
 
-void badge_scroll_text(char const *const *lines, size_t n) {
-  size_t first_visible  = 0;
+void badge_scroll_text(char const *const *lines, uint8_t n) {
+  uint8_t first_visible  = 0;
   int scroll_direction  = 0;
   unsigned scroll_ticks = 0;