UI Code Quality: Use derived struct for number buttons

For the man rationale behind this design, see 49f088e2d0. Further,
this removes users of uiBut.a1/uiBut.a2, which is a very ugly design
choice (hard to reason about).

Note that I had to do rather ugly, specific exceptions for the number
buttons in `ui_def_but_rna()`. But once all users of a1/a2 are removed,
this special handling shouldn't be needed anymore.
I also had to move a sanity check out of the button definition. It's now
moved into a new debug only sanity checking function executed when
finishing the layout definition (block end).

source/blender/editors/animation/fmodifier_ui.c

@@ -196,9 +196,10 @@ static void draw_modifier__generator(uiLayout *layout,
           &data->poly_order,
           1,
           100,
-          1,
+          0,
           0,
           TIP_("'Order' of the Polynomial (for a polynomial with n terms, 'order' is n-1)"));
+      UI_but_number_step_size_set(but, 1);
       UI_but_func_set(but, validate_fmodifier_cb, fcm, fcurve_owner_id);
 
       /* calculate maximum width of label for "x^n" labels */
@@ -256,7 +257,7 @@ static void draw_modifier__generator(uiLayout *layout,
         }
 
         /* coefficient */
-        uiDefButF(block,
+        but = uiDefButF(block,
                         UI_BTYPE_NUM,
                         B_FMODIFIER_REDRAW,
                         "",
@@ -267,9 +268,11 @@ static void draw_modifier__generator(uiLayout *layout,
                         cp,
                         -UI_FLT_MAX,
                         UI_FLT_MAX,
-                  10,
+                        0,
-                  3,
+                        0,
                         TIP_("Coefficient for polynomial"));
+        UI_but_number_step_size_set(but, 10);
+        UI_but_number_precision_set(but, 3);
 
         /* 'x' param (and '+' if necessary) */
         if (i == 0) {
@@ -334,10 +337,11 @@ static void draw_modifier__generator(uiLayout *layout,
           &data->poly_order,
           1,
           100,
-          1,
+          0,
           0,
           TIP_("'Order' of the Polynomial (for a polynomial with n terms, 'order' is n-1)"));
       UI_but_func_set(but, validate_fmodifier_cb, fcm, fcurve_owner_id);
+      UI_but_number_step_size_set(but, 1);
 
       /* draw controls for each pair of coefficients */
       row = uiLayoutRow(layout, true);
@@ -386,7 +390,7 @@ static void draw_modifier__generator(uiLayout *layout,
             block, UI_BTYPE_LABEL, 1, "(", 0, 0, UI_UNIT_X, UI_UNIT_Y, NULL, 0.0, 0.0, 0, 0, "");
 
         /* coefficients */
-        uiDefButF(block,
+        but = uiDefButF(block,
                         UI_BTYPE_NUM,
                         B_FMODIFIER_REDRAW,
                         "",
@@ -397,9 +401,11 @@ static void draw_modifier__generator(uiLayout *layout,
                         cp,
                         -UI_FLT_MAX,
                         UI_FLT_MAX,
-                  10,
+                        0,
-                  3,
+                        0,
                         TIP_("Coefficient of x"));
+        UI_but_number_step_size_set(but, 10);
+        UI_but_number_precision_set(but, 3);
 
         uiDefBut(block,
                  UI_BTYPE_LABEL,
@@ -416,7 +422,7 @@ static void draw_modifier__generator(uiLayout *layout,
                  0,
                  "");
 
-        uiDefButF(block,
+        but = uiDefButF(block,
                         UI_BTYPE_NUM,
                         B_FMODIFIER_REDRAW,
                         "",
@@ -427,9 +433,11 @@ static void draw_modifier__generator(uiLayout *layout,
                         cp + 1,
                         -UI_FLT_MAX,
                         UI_FLT_MAX,
-                  10,
+                        0,
-                  3,
+                        0,
                         TIP_("Second coefficient"));
+        UI_but_number_step_size_set(but, 10);
+        UI_but_number_precision_set(but, 3);
 
         /* closing bracket and multiplication sign */
         if ((i != (data->poly_order - 1)) || ((i == 0) && data->poly_order == 2)) {
@@ -724,7 +732,7 @@ static void draw_modifier__envelope(uiLayout *layout,
     block = uiLayoutGetBlock(row);
 
     UI_block_align_begin(block);
-    uiDefButR(block,
+    but = uiDefButR(block,
                     UI_BTYPE_NUM,
                     B_FMODIFIER_REDRAW,
                     IFACE_("Fra:"),
@@ -737,10 +745,12 @@ static void draw_modifier__envelope(uiLayout *layout,
                     -1,
                     -MAXFRAMEF,
                     MAXFRAMEF,
-              10,
+                    0,
-              1,
+                    0,
                     NULL);
-    uiDefButR(block,
+    UI_but_number_step_size_set(but, 10);
+    UI_but_number_precision_set(but, 1);
+    but = uiDefButR(block,
                     UI_BTYPE_NUM,
                     B_FMODIFIER_REDRAW,
                     IFACE_("Min:"),
@@ -753,10 +763,12 @@ static void draw_modifier__envelope(uiLayout *layout,
                     -1,
                     -UI_FLT_MAX,
                     UI_FLT_MAX,
-              10,
+                    0,
-              2,
+                    0,
                     NULL);
-    uiDefButR(block,
+    UI_but_number_step_size_set(but, 10);
+    UI_but_number_precision_set(but, 2);
+    but = uiDefButR(block,
                     UI_BTYPE_NUM,
                     B_FMODIFIER_REDRAW,
                     IFACE_("Max:"),
@@ -769,9 +781,11 @@ static void draw_modifier__envelope(uiLayout *layout,
                     -1,
                     -UI_FLT_MAX,
                     UI_FLT_MAX,
-              10,
+                    0,
-              2,
+                    0,
                     NULL);
+    UI_but_number_step_size_set(but, 10);
+    UI_but_number_precision_set(but, 2);
 
     but = uiDefIconBut(block,
                        UI_BTYPE_BUT,

source/blender/editors/include/UI_interface.h

@@ -1602,6 +1602,9 @@ int UI_search_items_find_index(uiSearchItems *items, const char *name);
 
 void UI_but_node_link_set(uiBut *but, struct bNodeSocket *socket, const float draw_color[4]);
 
+void UI_but_number_step_size_set(uiBut *but, float step_size);
+void UI_but_number_precision_set(uiBut *but, float precision);
+
 void UI_block_func_handle_set(uiBlock *block, uiBlockHandleFunc func, void *arg);
 void UI_block_func_butmenu_set(uiBlock *block, uiMenuHandleFunc func, void *arg);
 void UI_block_func_set(uiBlock *block, uiButHandleFunc func, void *arg1, void *arg2);

source/blender/editors/interface/interface.c

@@ -622,9 +622,18 @@ void UI_block_bounds_set_explicit(uiBlock *block, int minx, int miny, int maxx,
   block->bounds_type = UI_BLOCK_BOUNDS_NONE;
 }
 
+static float ui_but_get_float_precision(uiBut *but)
+{
+  if (but->type == UI_BTYPE_NUM) {
+    return ((uiButNumber *)but)->precision;
+  }
+
+  return but->a2;
+}
+
 static int ui_but_calc_float_precision(uiBut *but, double value)
 {
-  int prec = (int)but->a2;
+  int prec = (int)ui_but_get_float_precision(but);
 
   /* first check for various special cases:
    * * If button is radians, we want additional precision (see T39861).
@@ -1737,6 +1746,24 @@ void UI_block_update_from_old(const bContext *C, uiBlock *block)
   block->oldblock = NULL;
 }
 
+#ifndef NDEBUG
+/**
+ * Extra sanity checks for invariants (debug builds only).
+ */
+static void ui_but_validate(const uiBut *but)
+{
+  /* Number buttons must have a click-step,
+   * assert instead of correcting the value to ensure the caller knows what they're doing.  */
+  if (but->type == UI_BTYPE_NUM) {
+    uiButNumber *number_but = (uiButNumber *)but;
+
+    if (ELEM(but->pointype, UI_BUT_POIN_CHAR, UI_BUT_POIN_SHORT, UI_BUT_POIN_INT)) {
+      BLI_assert((int)number_but->step_size > 0);
+    }
+  }
+}
+#endif
+
 void UI_block_end_ex(const bContext *C, uiBlock *block, const int xy[2], int r_xy[2])
 {
   wmWindow *window = CTX_wm_window(C);
@@ -1778,6 +1805,10 @@ void UI_block_end_ex(const bContext *C, uiBlock *block, const int xy[2], int r_x
       ui_but_anim_decorate_update_from_flag((uiButDecorator *)but);
     }
     ui_but_predefined_extra_operator_icons_add(but);
+
+#ifndef NDEBUG
+    ui_but_validate(but);
+#endif
   }
 
   /* handle pending stuff */
@@ -2562,7 +2593,7 @@ static void ui_get_but_string_unit(
   /* Use precision override? */
   if (float_precision == -1) {
     /* Sanity checks */
-    precision = (int)but->a2;
+    precision = (int)ui_but_get_float_precision(but);
     if (precision > UI_PRECISION_FLOAT_MAX) {
       precision = UI_PRECISION_FLOAT_MAX;
     }
@@ -3768,6 +3799,10 @@ static void ui_but_alloc_info(const eButType type,
   bool has_custom_type = true;
 
   switch (type) {
+    case UI_BTYPE_NUM:
+      alloc_size = sizeof(uiButNumber);
+      alloc_str = "uiButNumber";
+      break;
     case UI_BTYPE_COLOR:
       alloc_size = sizeof(uiButColor);
       alloc_str = "uiButColor";
@@ -3914,14 +3949,6 @@ static uiBut *ui_def_but(uiBlock *block,
                 (a1 != 0.0f && a1 != 1.0f)) == false);
   }
 
-  /* Number buttons must have a click-step,
-   * assert instead of correcting the value to ensure the caller knows what they're doing.  */
-  if ((type & BUTTYPE) == UI_BTYPE_NUM) {
-    if (ELEM((type & UI_BUT_POIN_TYPES), UI_BUT_POIN_CHAR, UI_BUT_POIN_SHORT, UI_BUT_POIN_INT)) {
-      BLI_assert((int)a1 > 0);
-    }
-  }
-
   if (type & UI_BUT_POIN_TYPES) { /* a pointer is required */
     if (poin == NULL) {
       BLI_assert(0);
@@ -4360,6 +4387,7 @@ static uiBut *ui_def_but_rna(uiBlock *block,
   uiBut *but;
   int icon = 0;
   uiMenuCreateFunc func = NULL;
+  const bool always_set_a1_a2 = ELEM(type, UI_BTYPE_NUM);
 
   if (ELEM(type, UI_BTYPE_COLOR, UI_BTYPE_HSVCIRCLE, UI_BTYPE_HSVCUBE)) {
     BLI_assert(index == -1);
@@ -4424,7 +4452,7 @@ static uiBut *ui_def_but_rna(uiBlock *block,
     tip = RNA_property_ui_description(prop);
   }
 
-  if (min == max || a1 == -1 || a2 == -1) {
+  if (min == max || a1 == -1 || a2 == -1 || always_set_a1_a2) {
     if (proptype == PROP_INT) {
       int hardmin, hardmax, softmin, softmax, step;
 
@@ -4435,10 +4463,10 @@ static uiBut *ui_def_but_rna(uiBlock *block,
         min = hardmin;
         max = hardmax;
       }
-      if (a1 == -1) {
+      if (a1 == -1 || always_set_a1_a2) {
         a1 = step;
       }
-      if (a2 == -1) {
+      if (a2 == -1 || always_set_a1_a2) {
         a2 = 0;
       }
     }
@@ -4452,10 +4480,10 @@ static uiBut *ui_def_but_rna(uiBlock *block,
         min = hardmin;
         max = hardmax;
       }
-      if (a1 == -1) {
+      if (a1 == -1 || always_set_a1_a2) {
         a1 = step;
       }
-      if (a2 == -1) {
+      if (a2 == -1 || always_set_a1_a2) {
         a2 = precision;
       }
     }
@@ -4469,6 +4497,12 @@ static uiBut *ui_def_but_rna(uiBlock *block,
   /* now create button */
   but = ui_def_but(block, type, retval, str, x, y, width, height, NULL, min, max, a1, a2, tip);
 
+  if (but->type == UI_BTYPE_NUM) {
+    /* Set default values, can be overriden later. */
+    UI_but_number_step_size_set(but, a1);
+    UI_but_number_precision_set(but, a2);
+  }
+
   but->rnapoin = *ptr;
   but->rnaprop = prop;
 
@@ -4506,8 +4540,14 @@ static uiBut *ui_def_but_rna(uiBlock *block,
 
   /* If this button uses units, calculate the step from this */
   if ((proptype == PROP_FLOAT) && ui_but_is_unit(but)) {
+    if (type == UI_BTYPE_NUM) {
+      uiButNumber *number_but = (uiButNumber *)but;
+      number_but->step_size = ui_get_but_step_unit(but, number_but->step_size);
+    }
+    else {
       but->a1 = ui_get_but_step_unit(but, but->a1);
     }
+  }
 
   if (func) {
     but->menu_create_func = func;
@@ -6707,6 +6747,24 @@ void UI_but_node_link_set(uiBut *but, bNodeSocket *socket, const float draw_colo
   rgba_float_to_uchar(but->col, draw_color);
 }
 
+void UI_but_number_step_size_set(uiBut *but, float step_size)
+{
+  uiButNumber *but_number = (uiButNumber *)but;
+  BLI_assert(but->type == UI_BTYPE_NUM);
+
+  but_number->step_size = step_size;
+  BLI_assert(step_size > 0);
+}
+
+void UI_but_number_precision_set(uiBut *but, float precision)
+{
+  uiButNumber *but_number = (uiButNumber *)but;
+  BLI_assert(but->type == UI_BTYPE_NUM);
+
+  but_number->precision = precision;
+  BLI_assert(precision > -1);
+}
+
 /**
  * push a new event onto event queue to activate the given button
  * (usually a text-field) upon entering a popup

source/blender/editors/interface/interface_handlers.c

@@ -3896,12 +3896,14 @@ static void ui_numedit_begin(uiBut *but, uiHandleButtonData *data)
     softrange = softmax - softmin;
 
     if ((but->type == UI_BTYPE_NUM) && (ui_but_is_cursor_warp(but) == false)) {
+      uiButNumber *number_but = (uiButNumber *)but;
       /* Use a minimum so we have a predictable range,
        * otherwise some float buttons get a large range. */
       const float value_step_float_min = 0.1f;
       const bool is_float = ui_but_is_float(but);
-      const double value_step = is_float ? (double)(but->a1 * UI_PRECISION_FLOAT_SCALE) :
+      const double value_step = is_float ?
-                                           (int)but->a1;
+                                    (double)(number_but->step_size * UI_PRECISION_FLOAT_SCALE) :
+                                    (int)number_but->step_size;
       const float drag_map_softrange_max = UI_DRAG_MAP_SOFT_RANGE_PIXEL_MAX * UI_DPI_FAC;
       const float softrange_max = min_ff(
           softrange,
@@ -4699,13 +4701,14 @@ static float ui_numedit_apply_snap(int temp,
   return temp;
 }
 
-static bool ui_numedit_but_NUM(uiBut *but,
+static bool ui_numedit_but_NUM(uiButNumber *number_but,
                                uiHandleButtonData *data,
                                int mx,
                                const bool is_motion,
                                const enum eSnapType snap,
                                float fac)
 {
+  uiBut *but = &number_but->but;
   float deler, tempf;
   int lvalue, temp;
   bool changed = false;
@@ -4724,7 +4727,7 @@ static bool ui_numedit_but_NUM(uiBut *but,
     /* Mouse location isn't screen clamped to the screen so use a linear mapping
      * 2px == 1-int, or 1px == 1-ClickStep */
     if (is_float) {
-      fac *= 0.01f * but->a1;
+      fac *= 0.01f * number_but->step_size;
       tempf = (float)data->startvalue + ((float)(mx - data->dragstartx) * fac);
       tempf = ui_numedit_apply_snapf(but, tempf, softmin, softmax, snap);
 
@@ -4927,6 +4930,7 @@ static void ui_numedit_set_active(uiBut *but)
 static int ui_do_but_NUM(
     bContext *C, uiBlock *block, uiBut *but, uiHandleButtonData *data, const wmEvent *event)
 {
+  uiButNumber *number_but = (uiButNumber *)but;
   int click = 0;
   int retval = WM_UI_HANDLER_CONTINUE;
 
@@ -4936,6 +4940,8 @@ static int ui_do_but_NUM(
   /* mouse location kept at screen pixel coords */
   const int screen_mx = event->x;
 
+  BLI_assert(but->type == UI_BTYPE_NUM);
+
   ui_window_to_block(data->region, block, &mx, &my);
   ui_numedit_set_active(but);
 
@@ -5028,8 +5034,12 @@ static int ui_do_but_NUM(
         fac /= 10.0f;
       }
 
-      if (ui_numedit_but_NUM(
+      if (ui_numedit_but_NUM(number_but,
-              but, data, (ui_but_is_cursor_warp(but) ? screen_mx : mx), is_motion, snap, fac)) {
+                             data,
+                             (ui_but_is_cursor_warp(but) ? screen_mx : mx),
+                             is_motion,
+                             snap,
+                             fac)) {
         ui_numedit_apply(C, block, but, data);
       }
 #ifdef USE_DRAG_MULTINUM
@@ -5060,7 +5070,7 @@ static int ui_do_but_NUM(
       if (but->drawflag & (UI_BUT_ACTIVE_LEFT | UI_BUT_ACTIVE_RIGHT)) {
         button_activate_state(C, but, BUTTON_STATE_NUM_EDITING);
 
-        const int value_step = (int)but->a1;
+        const int value_step = (int)number_but->step_size;
         BLI_assert(value_step > 0);
         const int softmin = round_fl_to_int_clamp(but->softmin);
         const int softmax = round_fl_to_int_clamp(but->softmax);
@@ -5084,7 +5094,7 @@ static int ui_do_but_NUM(
       if (but->drawflag & (UI_BUT_ACTIVE_LEFT | UI_BUT_ACTIVE_RIGHT)) {
         button_activate_state(C, but, BUTTON_STATE_NUM_EDITING);
 
-        const double value_step = (double)but->a1 * UI_PRECISION_FLOAT_SCALE;
+        const double value_step = (double)number_but->step_size * UI_PRECISION_FLOAT_SCALE;
         BLI_assert(value_step > 0.0f);
         const double value_test = (but->drawflag & UI_BUT_ACTIVE_LEFT) ?
                                       (double)max_ff(but->softmin,

source/blender/editors/interface/interface_intern.h

@@ -174,7 +174,6 @@ struct uiBut {
 
   /**
    * For #uiBut.type:
-   * - UI_BTYPE_NUM:          Use to store RNA 'step' value, for dragging and click-step.
    * - UI_BTYPE_LABEL:        Use `(a1 == 1.0f)` to use a2 as a blending factor (imaginative!).
    * - UI_BTYPE_SCROLL:       Use as scroll size.
    * - UI_BTYPE_SEARCH_MENU:  Use as number or rows.
@@ -184,7 +183,6 @@ struct uiBut {
   /**
    * For #uiBut.type:
    * - UI_BTYPE_HSVCIRCLE:    Use to store the luminosity.
-   * - UI_BTYPE_NUM:          Use to store RNA 'precision' value, for dragging and click-step.
    * - UI_BTYPE_LABEL:        If `(a1 == 1.0f)` use a2 as a blending factor.
    * - UI_BTYPE_SEARCH_MENU:  Use as number or columns.
    */
@@ -276,6 +274,14 @@ struct uiBut {
   uiBlock *block;
 };
 
+/** Derived struct for #UI_BTYPE_NUM */
+typedef struct uiButNumber {
+  uiBut but;
+
+  float step_size;
+  float precision;
+} uiButNumber;
+
 /** Derived struct for #UI_BTYPE_COLOR */
 typedef struct uiButColor {
   uiBut but;

source/blender/editors/interface/interface_layout.c

@@ -629,7 +629,10 @@ static void ui_item_array(uiLayout *layout,
                           w,
                           UI_UNIT_Y);
       if (slider && but->type == UI_BTYPE_NUM) {
-        but->type = UI_BTYPE_NUM_SLIDER;
+        uiButNumber *number_but = (uiButNumber *)but;
+
+        but->a1 = number_but->step_size;
+        ui_but_change_type(but, UI_BTYPE_NUM_SLIDER);
       }
     }
   }
@@ -697,7 +700,10 @@ static void ui_item_array(uiLayout *layout,
 
         but = uiDefAutoButR(block, ptr, prop, a, str_buf, icon, 0, 0, width_item, UI_UNIT_Y);
         if (slider && but->type == UI_BTYPE_NUM) {
-          but->type = UI_BTYPE_NUM_SLIDER;
+          uiButNumber *number_but = (uiButNumber *)but;
+
+          but->a1 = number_but->step_size;
+          ui_but_change_type(but, UI_BTYPE_NUM_SLIDER);
         }
         if ((toggle == 1) && but->type == UI_BTYPE_CHECKBOX) {
           but->type = UI_BTYPE_TOGGLE;
@@ -2290,7 +2296,10 @@ void uiItemFullR(uiLayout *layout,
     but = uiDefAutoButR(block, ptr, prop, index, name, icon, 0, 0, w, h);
 
     if (slider && but->type == UI_BTYPE_NUM) {
-      but->type = UI_BTYPE_NUM_SLIDER;
+      uiButNumber *num_but = (uiButNumber *)but;
+
+      but->a1 = num_but->step_size;
+      ui_but_change_type(but, UI_BTYPE_NUM_SLIDER);
     }
 
     if (flag & UI_ITEM_R_CHECKBOX_INVERT) {

source/blender/editors/interface/interface_templates.c

@@ -3319,7 +3319,7 @@ static void colorband_buttons_layout(uiLayout *layout,
       split = uiLayoutSplit(layout, 0.3f, false);
 
       row = uiLayoutRow(split, false);
-      uiDefButS(block,
+      bt = uiDefButS(block,
                      UI_BTYPE_NUM,
                      0,
                      "",
@@ -3330,9 +3330,11 @@ static void colorband_buttons_layout(uiLayout *layout,
                      &coba->cur,
                      0.0,
                      (float)(MAX2(0, coba->tot - 1)),
-                1,
+                     0,
                      0,
                      TIP_("Choose active color stop"));
+      UI_but_number_step_size_set(bt, 1);
+
       row = uiLayoutRow(split, false);
       uiItemR(row, &ptr, "position", 0, IFACE_("Pos"), ICON_NONE);
       bt = block->buttons.last;
@@ -3349,7 +3351,7 @@ static void colorband_buttons_layout(uiLayout *layout,
       subsplit = uiLayoutSplit(split, 0.35f, false);
 
       row = uiLayoutRow(subsplit, false);
-      uiDefButS(block,
+      bt = uiDefButS(block,
                      UI_BTYPE_NUM,
                      0,
                      "",
@@ -3360,9 +3362,11 @@ static void colorband_buttons_layout(uiLayout *layout,
                      &coba->cur,
                      0.0,
                      (float)(MAX2(0, coba->tot - 1)),
-                1,
+                     0,
                      0,
                      TIP_("Choose active color stop"));
+      UI_but_number_step_size_set(bt, 1);
+
       row = uiLayoutRow(subsplit, false);
       uiItemR(row, &ptr, "position", UI_ITEM_R_SLIDER, IFACE_("Pos"), ICON_NONE);
       bt = block->buttons.last;
@@ -3915,7 +3919,7 @@ static uiBlock *curvemap_clipping_func(bContext *C, ARegion *region, void *cumap
   UI_but_func_set(bt, curvemap_buttons_setclip, cumap, NULL);
 
   UI_block_align_begin(block);
-  uiDefButF(block,
+  bt = uiDefButF(block,
                  UI_BTYPE_NUM,
                  0,
                  IFACE_("Min X:"),
@@ -3926,10 +3930,12 @@ static uiBlock *curvemap_clipping_func(bContext *C, ARegion *region, void *cumap
                  &cumap->clipr.xmin,
                  -100.0,
                  cumap->clipr.xmax,
-            10,
+                 0,
-            2,
+                 0,
                  "");
-  uiDefButF(block,
+  UI_but_number_step_size_set(bt, 10);
+  UI_but_number_precision_set(bt, 2);
+  bt = uiDefButF(block,
                  UI_BTYPE_NUM,
                  0,
                  IFACE_("Min Y:"),
@@ -3940,10 +3946,12 @@ static uiBlock *curvemap_clipping_func(bContext *C, ARegion *region, void *cumap
                  &cumap->clipr.ymin,
                  -100.0,
                  cumap->clipr.ymax,
-            10,
+                 0,
-            2,
+                 0,
                  "");
-  uiDefButF(block,
+  UI_but_number_step_size_set(bt, 10);
+  UI_but_number_precision_set(bt, 2);
+  bt = uiDefButF(block,
                  UI_BTYPE_NUM,
                  0,
                  IFACE_("Max X:"),
@@ -3954,10 +3962,12 @@ static uiBlock *curvemap_clipping_func(bContext *C, ARegion *region, void *cumap
                  &cumap->clipr.xmax,
                  cumap->clipr.xmin,
                  100.0,
-            10,
+                 0,
-            2,
+                 0,
                  "");
-  uiDefButF(block,
+  UI_but_number_step_size_set(bt, 10);
+  UI_but_number_precision_set(bt, 2);
+  bt = uiDefButF(block,
                  UI_BTYPE_NUM,
                  0,
                  IFACE_("Max Y:"),
@@ -3968,9 +3978,11 @@ static uiBlock *curvemap_clipping_func(bContext *C, ARegion *region, void *cumap
                  &cumap->clipr.ymax,
                  cumap->clipr.ymin,
                  100.0,
-            10,
+                 0,
-            2,
+                 0,
                  "");
+  UI_but_number_step_size_set(bt, 10);
+  UI_but_number_precision_set(bt, 2);
 
   UI_block_bounds_set_normal(block, 0.3f * U.widget_unit);
   UI_block_direction_set(block, UI_DIR_DOWN);
@@ -4464,7 +4476,7 @@ static void curvemap_buttons_layout(uiLayout *layout,
 
     uiLayoutRow(layout, true);
     UI_block_funcN_set(block, curvemap_buttons_update, MEM_dupallocN(cb), cumap);
-    uiDefButF(block,
+    bt = uiDefButF(block,
                    UI_BTYPE_NUM,
                    0,
                    "X",
@@ -4475,10 +4487,12 @@ static void curvemap_buttons_layout(uiLayout *layout,
                    &cmp->x,
                    bounds.xmin,
                    bounds.xmax,
-              1,
+                   0,
-              5,
+                   0,
                    "");
-    uiDefButF(block,
+    UI_but_number_step_size_set(bt, 1);
+    UI_but_number_precision_set(bt, 5);
+    bt = uiDefButF(block,
                    UI_BTYPE_NUM,
                    0,
                    "Y",
@@ -4489,9 +4503,11 @@ static void curvemap_buttons_layout(uiLayout *layout,
                    &cmp->y,
                    bounds.ymin,
                    bounds.ymax,
-              1,
+                   0,
-              5,
+                   0,
                    "");
+    UI_but_number_step_size_set(bt, 1);
+    UI_but_number_precision_set(bt, 5);
   }
 
   /* black/white levels */
@@ -5075,9 +5091,11 @@ static void CurveProfile_buttons_layout(uiLayout *layout, PointerRNA *ptr, RNAUp
                    selection_x,
                    bounds.xmin,
                    bounds.xmax,
-                   1,
+                   0,
-                   5,
+                   0,
                    "");
+    UI_but_number_step_size_set(bt, 1);
+    UI_but_number_precision_set(bt, 5);
     UI_but_funcN_set(bt, CurveProfile_buttons_update, MEM_dupallocN(cb), profile);
     if (point_last_or_first) {
       UI_but_flag_enable(bt, UI_BUT_DISABLED);
@@ -5093,9 +5111,11 @@ static void CurveProfile_buttons_layout(uiLayout *layout, PointerRNA *ptr, RNAUp
                    selection_y,
                    bounds.ymin,
                    bounds.ymax,
-                   1,
+                   0,
-                   5,
+                   0,
                    "");
+    UI_but_number_step_size_set(bt, 1);
+    UI_but_number_precision_set(bt, 5);
     UI_but_funcN_set(bt, CurveProfile_buttons_update, MEM_dupallocN(cb), profile);
     if (point_last_or_first) {
       UI_but_flag_enable(bt, UI_BUT_DISABLED);

source/blender/editors/interface/interface_utils.c

@@ -164,7 +164,7 @@ uiBut *uiDefAutoButR(uiBlock *block,
       }
       else {
         but = uiDefButR_prop(
-            block, UI_BTYPE_NUM, 0, name, x1, y1, x2, y2, ptr, prop, index, 0, 0, -1, -1, NULL);
+            block, UI_BTYPE_NUM, 0, name, x1, y1, x2, y2, ptr, prop, index, 0, 0, 0, 0, NULL);
       }
 
       if (RNA_property_flag(prop) & PROP_TEXTEDIT_UPDATE) {

source/blender/editors/space_clip/clip_buttons.c

@@ -585,7 +585,7 @@ void uiTemplateMarker(uiLayout *layout,
              0,
              0,
              "");
-    uiDefButF(block,
+    bt = uiDefButF(block,
                    UI_BTYPE_NUM,
                    B_MARKER_POS,
                    IFACE_("X:"),
@@ -596,10 +596,12 @@ void uiTemplateMarker(uiLayout *layout,
                    &cb->marker_pos[0],
                    -10 * width,
                    10.0 * width,
-              step,
+                   0,
-              digits,
+                   0,
                    TIP_("X-position of marker at frame in screen coordinates"));
-    uiDefButF(block,
+    UI_but_number_step_size_set(bt, step);
+    UI_but_number_precision_set(bt, digits);
+    bt = uiDefButF(block,
                    UI_BTYPE_NUM,
                    B_MARKER_POS,
                    IFACE_("Y:"),
@@ -610,9 +612,11 @@ void uiTemplateMarker(uiLayout *layout,
                    &cb->marker_pos[1],
                    -10 * height,
                    10.0 * height,
-              step,
+                   0,
-              digits,
+                   0,
                    TIP_("Y-position of marker at frame in screen coordinates"));
+    UI_but_number_step_size_set(bt, step);
+    UI_but_number_precision_set(bt, digits);
 
     uiDefBut(block,
              UI_BTYPE_LABEL,
@@ -628,7 +632,7 @@ void uiTemplateMarker(uiLayout *layout,
              0,
              0,
              "");
-    uiDefButF(block,
+    bt = uiDefButF(block,
                    UI_BTYPE_NUM,
                    B_MARKER_OFFSET,
                    IFACE_("X:"),
@@ -639,10 +643,12 @@ void uiTemplateMarker(uiLayout *layout,
                    &cb->track_offset[0],
                    -10 * width,
                    10.0 * width,
-              step,
+                   0,
-              digits,
+                   0,
                    TIP_("X-offset to parenting point"));
-    uiDefButF(block,
+    UI_but_number_step_size_set(bt, step);
+    UI_but_number_precision_set(bt, digits);
+    bt = uiDefButF(block,
                    UI_BTYPE_NUM,
                    B_MARKER_OFFSET,
                    IFACE_("Y:"),
@@ -653,9 +659,11 @@ void uiTemplateMarker(uiLayout *layout,
                    &cb->track_offset[1],
                    -10 * height,
                    10.0 * height,
-              step,
+                   0,
-              digits,
+                   0,
                    TIP_("Y-offset to parenting point"));
+    UI_but_number_step_size_set(bt, step);
+    UI_but_number_precision_set(bt, digits);
 
     uiDefBut(block,
              UI_BTYPE_LABEL,
@@ -671,7 +679,7 @@ void uiTemplateMarker(uiLayout *layout,
              0,
              0,
              "");
-    uiDefButF(block,
+    bt = uiDefButF(block,
                    UI_BTYPE_NUM,
                    B_MARKER_PAT_DIM,
                    IFACE_("Width:"),
@@ -682,10 +690,12 @@ void uiTemplateMarker(uiLayout *layout,
                    &cb->marker_pat[0],
                    3.0f,
                    10.0 * width,
-              step,
+                   0,
-              digits,
+                   0,
                    TIP_("Width of marker's pattern in screen coordinates"));
-    uiDefButF(block,
+    UI_but_number_step_size_set(bt, step);
+    UI_but_number_precision_set(bt, digits);
+    bt = uiDefButF(block,
                    UI_BTYPE_NUM,
                    B_MARKER_PAT_DIM,
                    IFACE_("Height:"),
@@ -696,9 +706,11 @@ void uiTemplateMarker(uiLayout *layout,
                    &cb->marker_pat[1],
                    3.0f,
                    10.0 * height,
-              step,
+                   0,
-              digits,
+                   0,
                    TIP_("Height of marker's pattern in screen coordinates"));
+    UI_but_number_step_size_set(bt, step);
+    UI_but_number_precision_set(bt, digits);
 
     uiDefBut(block,
              UI_BTYPE_LABEL,
@@ -714,7 +726,7 @@ void uiTemplateMarker(uiLayout *layout,
              0,
              0,
              "");
-    uiDefButF(block,
+    bt = uiDefButF(block,
                    UI_BTYPE_NUM,
                    B_MARKER_SEARCH_POS,
                    IFACE_("X:"),
@@ -725,10 +737,12 @@ void uiTemplateMarker(uiLayout *layout,
                    &cb->marker_search_pos[0],
                    -width,
                    width,
-              step,
+                   0,
-              digits,
+                   0,
                    TIP_("X-position of search at frame relative to marker's position"));
-    uiDefButF(block,
+    UI_but_number_step_size_set(bt, step);
+    UI_but_number_precision_set(bt, digits);
+    bt = uiDefButF(block,
                    UI_BTYPE_NUM,
                    B_MARKER_SEARCH_POS,
                    IFACE_("Y:"),
@@ -739,10 +753,12 @@ void uiTemplateMarker(uiLayout *layout,
                    &cb->marker_search_pos[1],
                    -height,
                    height,
-              step,
+                   0,
-              digits,
+                   0,
                    TIP_("Y-position of search at frame relative to marker's position"));
-    uiDefButF(block,
+    UI_but_number_step_size_set(bt, step);
+    UI_but_number_precision_set(bt, digits);
+    bt = uiDefButF(block,
                    UI_BTYPE_NUM,
                    B_MARKER_SEARCH_DIM,
                    IFACE_("Width:"),
@@ -753,10 +769,12 @@ void uiTemplateMarker(uiLayout *layout,
                    &cb->marker_search[0],
                    3.0f,
                    10.0 * width,
-              step,
+                   0,
-              digits,
+                   0,
                    TIP_("Width of marker's search in screen coordinates"));
-    uiDefButF(block,
+    UI_but_number_step_size_set(bt, step);
+    UI_but_number_precision_set(bt, digits);
+    bt = uiDefButF(block,
                    UI_BTYPE_NUM,
                    B_MARKER_SEARCH_DIM,
                    IFACE_("Height:"),
@@ -767,9 +785,11 @@ void uiTemplateMarker(uiLayout *layout,
                    &cb->marker_search[1],
                    3.0f,
                    10.0 * height,
-              step,
+                   0,
-              digits,
+                   0,
                    TIP_("Height of marker's search in screen coordinates"));
+    UI_but_number_step_size_set(bt, step);
+    UI_but_number_precision_set(bt, digits);
 
     UI_block_align_end(block);
   }

source/blender/editors/space_graph/graph_buttons.c

@@ -437,8 +437,8 @@ static void graph_panel_key_properties(const bContext *C, Panel *panel)
                       0,
                       0,
                       0,
-                      -1,
+                      0,
-                      -1,
+                      0,
                       NULL);
 
       uiItemL_respect_property_split(col, IFACE_("Value"), ICON_NONE);
@@ -455,8 +455,8 @@ static void graph_panel_key_properties(const bContext *C, Panel *panel)
                       1,
                       0,
                       0,
-                      -1,
+                      0,
-                      -1,
+                      0,
                       NULL);
       UI_but_func_set(but, graphedit_activekey_update_cb, fcu, bezt);
       UI_but_unit_type_set(but, unit);
@@ -501,8 +501,8 @@ static void graph_panel_key_properties(const bContext *C, Panel *panel)
                       0,
                       0,
                       0,
-                      -1,
+                      0,
-                      -1,
+                      0,
                       NULL);
       UI_but_func_set(but, graphedit_activekey_left_handle_coord_cb, fcu, bezt);
 
@@ -520,8 +520,8 @@ static void graph_panel_key_properties(const bContext *C, Panel *panel)
                       1,
                       0,
                       0,
-                      -1,
+                      0,
-                      -1,
+                      0,
                       NULL);
       UI_but_func_set(but, graphedit_activekey_left_handle_coord_cb, fcu, bezt);
       UI_but_unit_type_set(but, unit);
@@ -565,8 +565,8 @@ static void graph_panel_key_properties(const bContext *C, Panel *panel)
                       0,
                       0,
                       0,
-                      -1,
+                      0,
-                      -1,
+                      0,
                       NULL);
       UI_but_func_set(but, graphedit_activekey_right_handle_coord_cb, fcu, bezt);
 
@@ -584,8 +584,8 @@ static void graph_panel_key_properties(const bContext *C, Panel *panel)
                       1,
                       0,
                       0,
-                      -1,
+                      0,
-                      -1,
+                      0,
                       NULL);
       UI_but_func_set(but, graphedit_activekey_right_handle_coord_cb, fcu, bezt);
       UI_but_unit_type_set(but, unit);

source/blender/editors/space_view3d/view3d_buttons.c

@@ -472,9 +472,11 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                     &tfp->ve_median.generic.location[0],
                     -lim,
                     lim,
-                    10,
+                    0,
-                    RNA_TRANSLATION_PREC_DEFAULT,
+                    0,
                     "");
+    UI_but_number_step_size_set(but, 10);
+    UI_but_number_precision_set(but, RNA_TRANSLATION_PREC_DEFAULT);
     UI_but_unit_type_set(but, PROP_UNIT_LENGTH);
     but = uiDefButF(block,
                     UI_BTYPE_NUM,
@@ -487,9 +489,11 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                     &tfp->ve_median.generic.location[1],
                     -lim,
                     lim,
-                    10,
+                    0,
-                    RNA_TRANSLATION_PREC_DEFAULT,
+                    0,
                     "");
+    UI_but_number_step_size_set(but, 10);
+    UI_but_number_precision_set(but, RNA_TRANSLATION_PREC_DEFAULT);
     UI_but_unit_type_set(but, PROP_UNIT_LENGTH);
     but = uiDefButF(block,
                     UI_BTYPE_NUM,
@@ -502,13 +506,15 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                     &tfp->ve_median.generic.location[2],
                     -lim,
                     lim,
-                    10,
+                    0,
-                    RNA_TRANSLATION_PREC_DEFAULT,
+                    0,
                     "");
+    UI_but_number_step_size_set(but, 10);
+    UI_but_number_precision_set(but, RNA_TRANSLATION_PREC_DEFAULT);
     UI_but_unit_type_set(but, PROP_UNIT_LENGTH);
 
     if (totcurvebweight == tot) {
-      uiDefButF(block,
+      but = uiDefButF(block,
                       UI_BTYPE_NUM,
                       B_TRANSFORM_PANEL_MEDIAN,
                       IFACE_("W:"),
@@ -519,9 +525,11 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                       &(tfp->ve_median.curve.b_weight),
                       0.01,
                       100.0,
-                1,
+                      0,
-                3,
+                      0,
                       "");
+      UI_but_number_step_size_set(but, 1);
+      UI_but_number_precision_set(but, 3);
     }
 
     UI_block_align_begin(block);
@@ -576,7 +584,7 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                  0,
                  "");
         /* customdata layer added on demand */
-        uiDefButF(block,
+        but = uiDefButF(block,
                         UI_BTYPE_NUM,
                         B_TRANSFORM_PANEL_MEDIAN,
                         tot == 1 ? IFACE_("Bevel Weight:") : IFACE_("Mean Bevel Weight:"),
@@ -587,13 +595,15 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                         &ve_median->bv_weight,
                         0.0,
                         1.0,
-                  1,
+                        0,
-                  2,
+                        0,
                         TIP_("Vertex weight used by Bevel modifier"));
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 2);
       }
       if (has_skinradius) {
         UI_block_align_begin(block);
-        uiDefButF(block,
+        but = uiDefButF(block,
                         UI_BTYPE_NUM,
                         B_TRANSFORM_PANEL_MEDIAN,
                         tot == 1 ? IFACE_("Radius X:") : IFACE_("Mean Radius X:"),
@@ -604,10 +614,12 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                         &ve_median->skin[0],
                         0.0,
                         100.0,
-                  1,
+                        0,
-                  3,
+                        0,
                         TIP_("X radius used by Skin modifier"));
-        uiDefButF(block,
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 3);
+        but = uiDefButF(block,
                         UI_BTYPE_NUM,
                         B_TRANSFORM_PANEL_MEDIAN,
                         tot == 1 ? IFACE_("Radius Y:") : IFACE_("Mean Radius Y:"),
@@ -618,9 +630,11 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                         &ve_median->skin[1],
                         0.0,
                         100.0,
-                  1,
+                        0,
-                  3,
+                        0,
                         TIP_("Y radius used by Skin modifier"));
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 3);
         UI_block_align_end(block);
       }
       if (totedgedata) {
@@ -639,7 +653,7 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                  0,
                  "");
         /* customdata layer added on demand */
-        uiDefButF(block,
+        but = uiDefButF(block,
                         UI_BTYPE_NUM,
                         B_TRANSFORM_PANEL_MEDIAN,
                         totedgedata == 1 ? IFACE_("Bevel Weight:") : IFACE_("Mean Bevel Weight:"),
@@ -650,11 +664,13 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                         &ve_median->be_weight,
                         0.0,
                         1.0,
-                  1,
+                        0,
-                  2,
+                        0,
                         TIP_("Edge weight used by Bevel modifier"));
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 2);
         /* customdata layer added on demand */
-        uiDefButF(block,
+        but = uiDefButF(block,
                         UI_BTYPE_NUM,
                         B_TRANSFORM_PANEL_MEDIAN,
                         totedgedata == 1 ? IFACE_("Crease:") : IFACE_("Mean Crease:"),
@@ -665,16 +681,18 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                         &ve_median->crease,
                         0.0,
                         1.0,
-                  1,
+                        0,
-                  2,
+                        0,
                         TIP_("Weight used by the Subdivision Surface modifier"));
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 2);
       }
     }
     /* Curve... */
     else if (totcurvedata) {
       TransformMedian_Curve *ve_median = &tfp->ve_median.curve;
       if (totcurvedata == 1) {
-        uiDefButR(block,
+        but = uiDefButR(block,
                         UI_BTYPE_NUM,
                         0,
                         IFACE_("Weight:"),
@@ -687,10 +705,12 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                         0,
                         0.0,
                         1.0,
-                  1,
+                        0,
-                  3,
+                        0,
                         NULL);
-        uiDefButR(block,
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 3);
+        but = uiDefButR(block,
                         UI_BTYPE_NUM,
                         0,
                         IFACE_("Radius:"),
@@ -703,10 +723,12 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                         0,
                         0.0,
                         100.0,
-                  1,
+                        0,
-                  3,
+                        0,
                         NULL);
-        uiDefButR(block,
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 3);
+        but = uiDefButR(block,
                         UI_BTYPE_NUM,
                         0,
                         IFACE_("Tilt:"),
@@ -719,12 +741,14 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                         0,
                         -tilt_limit,
                         tilt_limit,
-                  1,
+                        0,
-                  3,
+                        0,
                         NULL);
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 3);
       }
       else if (totcurvedata > 1) {
-        uiDefButF(block,
+        but = uiDefButF(block,
                         UI_BTYPE_NUM,
                         B_TRANSFORM_PANEL_MEDIAN,
                         IFACE_("Mean Weight:"),
@@ -735,10 +759,12 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                         &ve_median->weight,
                         0.0,
                         1.0,
-                  1,
+                        0,
-                  3,
+                        0,
                         TIP_("Weight used for Soft Body Goal"));
-        uiDefButF(block,
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 3);
+        but = uiDefButF(block,
                         UI_BTYPE_NUM,
                         B_TRANSFORM_PANEL_MEDIAN,
                         IFACE_("Mean Radius:"),
@@ -749,9 +775,11 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                         &ve_median->radius,
                         0.0,
                         100.0,
-                  1,
+                        0,
-                  3,
+                        0,
                         TIP_("Radius of curve control points"));
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 3);
         but = uiDefButF(block,
                         UI_BTYPE_NUM,
                         B_TRANSFORM_PANEL_MEDIAN,
@@ -763,9 +791,11 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                         &ve_median->tilt,
                         -tilt_limit,
                         tilt_limit,
-                        1,
+                        0,
-                        3,
+                        0,
                         TIP_("Tilt of curve control points"));
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 3);
         UI_but_unit_type_set(but, PROP_UNIT_ROTATION);
       }
     }
@@ -786,12 +816,14 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                   0,
                   0.0,
                   1.0,
-                  1,
+                  0,
-                  3,
+                  0,
                   NULL);
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 3);
       }
       else if (totlattdata > 1) {
-        uiDefButF(block,
+        but = uiDefButF(block,
                         UI_BTYPE_NUM,
                         B_TRANSFORM_PANEL_MEDIAN,
                         IFACE_("Mean Weight:"),
@@ -802,9 +834,11 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
                         &ve_median->weight,
                         0.0,
                         1.0,
-                  1,
+                        0,
-                  3,
+                        0,
                         TIP_("Weight used for Soft Body Goal"));
+        UI_but_number_step_size_set(but, 1);
+        UI_but_number_precision_set(but, 3);
       }
     }
 
@@ -1083,9 +1117,11 @@ static void v3d_object_dimension_buts(bContext *C, uiLayout *layout, View3D *v3d
                       &(tfp->ob_dims[i]),
                       0.0f,
                       lim,
-                      10,
+                      0,
-                      3,
+                      0,
                       "");
+      UI_but_number_step_size_set(but, 10);
+      UI_but_number_precision_set(but, 3);
       UI_but_unit_type_set(but, PROP_UNIT_LENGTH);
     }
     UI_block_align_end(block);
@@ -1225,9 +1261,11 @@ static void view3d_panel_vgroup(const bContext *C, Panel *panel)
                           &dw->weight,
                           0.0,
                           1.0,
-                          1,
+                          0,
-                          3,
+                          0,
                           "");
+          UI_but_number_step_size_set(but, 1);
+          UI_but_number_precision_set(but, 3);
           UI_but_drawflag_enable(but, UI_BUT_TEXT_LEFT);
           if (locked) {
             lock_count++;

source/blender/editors/uvedit/uvedit_buttons.c

@@ -175,8 +175,10 @@ static void uvedit_vertex_buttons(const bContext *C, uiBlock *block)
       digits = 2;
     }
 
+    uiBut *but;
+
     UI_block_align_begin(block);
-    uiDefButF(block,
+    but = uiDefButF(block,
                     UI_BTYPE_NUM,
                     B_UVEDIT_VERTEX,
                     IFACE_("X:"),
@@ -186,10 +188,12 @@ static void uvedit_vertex_buttons(const bContext *C, uiBlock *block)
                     UI_UNIT_Y,
                     &uvedit_old_center[0],
                     UNPACK2(range_xy[0]),
-              step,
+                    0,
-              digits,
+                    0,
                     "");
-    uiDefButF(block,
+    UI_but_number_step_size_set(but, step);
+    UI_but_number_precision_set(but, digits);
+    but = uiDefButF(block,
                     UI_BTYPE_NUM,
                     B_UVEDIT_VERTEX,
                     IFACE_("Y:"),
@@ -199,9 +203,11 @@ static void uvedit_vertex_buttons(const bContext *C, uiBlock *block)
                     UI_UNIT_Y,
                     &uvedit_old_center[1],
                     UNPACK2(range_xy[1]),
-              step,
+                    0,
-              digits,
+                    0,
                     "");
+    UI_but_number_step_size_set(but, step);
+    UI_but_number_precision_set(but, digits);
     UI_block_align_end(block);
   }