Misc: allowing override of IM_TABSIZE (#5593)

imgui_demo.cpp

@@ -3813,7 +3813,7 @@ static void ShowDemoWindowTables()
         }
 
         // [Method 3] We call TableNextColumn() _before_ each cell. We never call TableNextRow(),
-        // as TableNextColumn() will automatically wrap around and create new roes as needed.
+        // as TableNextColumn() will automatically wrap around and create new rows as needed.
         // This is generally more convenient when your cells all contains the same type of data.
         HelpMarker(
             "Only using TableNextColumn(), which tends to be convenient for tables where every cells contains the same type of contents.\n"

imgui_internal.h

@@ -237,7 +237,9 @@ namespace ImStb
 #else
 #define IM_NEWLINE                      "\n"
 #endif
+#ifndef IM_TABSIZE                      // Until we move this to runtime and/or add proper tab support, at least allow users to compile-time override
 #define IM_TABSIZE                      (4)
+#endif
 #define IM_MEMALIGN(_OFF,_ALIGN)        (((_OFF) + ((_ALIGN) - 1)) & ~((_ALIGN) - 1))           // Memory align e.g. IM_ALIGN(0,4)=0, IM_ALIGN(1,4)=4, IM_ALIGN(4,4)=4, IM_ALIGN(5,4)=8
 #define IM_F32_TO_INT8_UNBOUND(_VAL)    ((int)((_VAL) * 255.0f + ((_VAL)>=0 ? 0.5f : -0.5f)))   // Unsaturated, for display purpose
 #define IM_F32_TO_INT8_SAT(_VAL)        ((int)(ImSaturate(_VAL) * 255.0f + 0.5f))               // Saturated, always output 0..255