Conceal float rounding errors on display

Fix #16866

Marlin/src/lcd/menu/menu.h

@@ -266,35 +266,35 @@ class TMenuEditItem : MenuEditItemBase {
 // Provide a set of Edit Item Types which encompass a primitive
 // type, a string function, and a scale factor for edit and display.
 // These items call the Edit Item draw method passing the prepared string.
-#define DEFINE_MENU_EDIT_ITEM_TYPE(TYPE, NAME, STRFUNC, SCALE, V...)                      \
-  struct MenuEditItemInfo_##NAME {                                                        \
-    typedef TYPE type_t;                                                                  \
-    static inline float scale(const float value)   { return value * (SCALE) + (V+0); }    \
-    static inline float unscale(const float value) { return value / (SCALE) + (V+0); }    \
-    static inline const char* strfunc(const float value) { return STRFUNC((TYPE)value); } \
-  };                                                                                      \
+#define DEFINE_MENU_EDIT_ITEM_TYPE(TYPE, NAME, FIX, STRFUNC, SCALE, V...) \
+  struct MenuEditItemInfo_##NAME { \
+    typedef TYPE type_t; \
+    static inline float scale(const float value)   { return value * (SCALE) + (V+0); } \
+    static inline float unscale(const float value) { return value / (SCALE) + (V+0); } \
+    static inline const char* strfunc(const float value) { return STRFUNC((TYPE)(FIX ? FIXFLOAT(value) : value)); } \
+  }; \
   typedef TMenuEditItem<MenuEditItemInfo_##NAME> MenuItem_##NAME
 
 //                         TYPE      NAME         STRFUNC       SCALE
-DEFINE_MENU_EDIT_ITEM_TYPE(uint8_t,  percent,     ui8tostr4pct, 100.0/255, 0.5);  // 100%   right-justified
-DEFINE_MENU_EDIT_ITEM_TYPE(int16_t,  int3,        i16tostr3,       1     );   // 123, -12   right-justified
-DEFINE_MENU_EDIT_ITEM_TYPE(int16_t,  int4,        i16tostr4sign,   1     );   // 1234, -123 right-justified
-DEFINE_MENU_EDIT_ITEM_TYPE(int8_t,   int8,        i8tostr3,        1     );   // 123, -12   right-justified
-DEFINE_MENU_EDIT_ITEM_TYPE(uint8_t,  uint8,       ui8tostr3,       1     );   // 123        right-justified
-DEFINE_MENU_EDIT_ITEM_TYPE(uint16_t, uint16_3,    ui16tostr3,      1     );   // 123        right-justified
-DEFINE_MENU_EDIT_ITEM_TYPE(uint16_t, uint16_4,    ui16tostr4,      0.1   );   // 1234       right-justified
-DEFINE_MENU_EDIT_ITEM_TYPE(uint16_t, uint16_5,    ui16tostr5,      0.01  );   // 12345      right-justified
-DEFINE_MENU_EDIT_ITEM_TYPE(float,    float3,      ftostr3,         1     );   // 123        right-justified
-DEFINE_MENU_EDIT_ITEM_TYPE(float,    float52,     ftostr42_52,   100     );   // _2.34, 12.34, -2.34 or 123.45, -23.45
-DEFINE_MENU_EDIT_ITEM_TYPE(float,    float43,     ftostr43sign, 1000     );   // 1.234
-DEFINE_MENU_EDIT_ITEM_TYPE(float,    float5,      ftostr5rj,       1     );   // 12345      right-justified
-DEFINE_MENU_EDIT_ITEM_TYPE(float,    float5_25,   ftostr5rj,       0.04f );   // 12345      right-justified (25 increment)
-DEFINE_MENU_EDIT_ITEM_TYPE(float,    float51,     ftostr51rj,     10     );   // 1234.5     right-justified
-DEFINE_MENU_EDIT_ITEM_TYPE(float,    float41sign, ftostr41sign,   10     );   // +123.4
-DEFINE_MENU_EDIT_ITEM_TYPE(float,    float51sign, ftostr51sign,   10     );   // +1234.5
-DEFINE_MENU_EDIT_ITEM_TYPE(float,    float52sign, ftostr52sign,  100     );   // +123.45
-DEFINE_MENU_EDIT_ITEM_TYPE(uint32_t, long5,       ftostr5rj,       0.01f );   // 12345      right-justified
-DEFINE_MENU_EDIT_ITEM_TYPE(uint32_t, long5_25,    ftostr5rj,       0.04f );   // 12345      right-justified (25 increment)
+DEFINE_MENU_EDIT_ITEM_TYPE(uint8_t,  percent,     0, ui8tostr4pct, 100.0/255, 0.5);  // 100%   right-justified
+DEFINE_MENU_EDIT_ITEM_TYPE(int16_t,  int3,        0, i16tostr3,       1     );   // 123, -12   right-justified
+DEFINE_MENU_EDIT_ITEM_TYPE(int16_t,  int4,        0, i16tostr4sign,   1     );   // 1234, -123 right-justified
+DEFINE_MENU_EDIT_ITEM_TYPE(int8_t,   int8,        0, i8tostr3,        1     );   // 123, -12   right-justified
+DEFINE_MENU_EDIT_ITEM_TYPE(uint8_t,  uint8,       0, ui8tostr3,       1     );   // 123        right-justified
+DEFINE_MENU_EDIT_ITEM_TYPE(uint16_t, uint16_3,    0, ui16tostr3,      1     );   // 123        right-justified
+DEFINE_MENU_EDIT_ITEM_TYPE(uint16_t, uint16_4,    0, ui16tostr4,      0.1   );   // 1234       right-justified
+DEFINE_MENU_EDIT_ITEM_TYPE(uint16_t, uint16_5,    0, ui16tostr5,      0.01  );   // 12345      right-justified
+DEFINE_MENU_EDIT_ITEM_TYPE(float,    float3,      1, ftostr3,         1     );   // 123        right-justified
+DEFINE_MENU_EDIT_ITEM_TYPE(float,    float52,     1, ftostr42_52,   100     );   // _2.34, 12.34, -2.34 or 123.45, -23.45
+DEFINE_MENU_EDIT_ITEM_TYPE(float,    float43,     1, ftostr43sign, 1000     );   // 1.234
+DEFINE_MENU_EDIT_ITEM_TYPE(float,    float5,      1, ftostr5rj,       1     );   // 12345      right-justified
+DEFINE_MENU_EDIT_ITEM_TYPE(float,    float5_25,   1, ftostr5rj,       0.04f );   // 12345      right-justified (25 increment)
+DEFINE_MENU_EDIT_ITEM_TYPE(float,    float51,     1, ftostr51rj,     10     );   // 1234.5     right-justified
+DEFINE_MENU_EDIT_ITEM_TYPE(float,    float41sign, 1, ftostr41sign,   10     );   // +123.4
+DEFINE_MENU_EDIT_ITEM_TYPE(float,    float51sign, 1, ftostr51sign,   10     );   // +1234.5
+DEFINE_MENU_EDIT_ITEM_TYPE(float,    float52sign, 1, ftostr52sign,  100     );   // +123.45
+DEFINE_MENU_EDIT_ITEM_TYPE(uint32_t, long5,       0, ftostr5rj,       0.01f );   // 12345      right-justified
+DEFINE_MENU_EDIT_ITEM_TYPE(uint32_t, long5_25,    0, ftostr5rj,       0.04f );   // 12345      right-justified (25 increment)
 
 class MenuItem_bool : public MenuEditItemBase {
   public: