InputFloat, SliderFloat, DragFloat: always turn both '.' and ',' into the current decimal point character. (#6719, #2278)

docs/CHANGELOG.txt

@@ -50,6 +50,8 @@ Other changes:
   through proper navigation logic: honor scrolling and selection. (#1079, #1131)
 - Sliders: Fixed an integer overflow and div-by-zero in SliderInt() when
   v_max=INT_MAX (#6675, #6679) [@jbarthelmes]
+- InputFloat, SliderFloat, DragFloat: always turn both '.' and ',' into the current decimal
+  point character when using Decimal/Scientific character filter. (#6719, #2278) [@adamsepp]
 - ImDrawData: Fixed an issue where TotalVtxCount/TotalIdxCount does not match the sum
   of individual ImDrawList's buffer sizes when a dimming/modal background is rendered. (#6716)
 - ImDrawList: Fixed OOB access in _CalcCircleAutoSegmentCount when passing excessively

imgui_widgets.cpp

@@ -3948,6 +3948,9 @@ static bool InputTextFilterCharacter(unsigned int* p_char, ImGuiInputTextFlags f
         // Users of non-default decimal point (in particular ',') may be affected by word-selection logic (is_word_boundary_from_right/is_word_boundary_from_left) functions.
         ImGuiContext& g = *GImGui;
         const unsigned c_decimal_point = (unsigned int)g.PlatformLocaleDecimalPoint;
+        if (flags & (ImGuiInputTextFlags_CharsDecimal | ImGuiInputTextFlags_CharsScientific))
+            if (c == '.' || c == ',')
+                c = c_decimal_point;
 
         // Full-width -> half-width conversion for numeric fields (https://en.wikipedia.org/wiki/Halfwidth_and_Fullwidth_Forms_(Unicode_block)
         // While this is mostly convenient, this has the side-effect for uninformed users accidentally inputting full-width characters that they may