Tables: remove ImGuiTableFlags_NoHeadersWidth since it is so rarely used and can be specified on a per-column basis.

Author: ocornut

imgui.h

@@ -1074,10 +1074,10 @@ enum ImGuiTableFlags_
     ImGuiTableFlags_ColumnsWidthStretch             = 1 << 13,  // Default if ScrollX is off. Columns will default to use _WidthStretch. Read description above for more details.
     ImGuiTableFlags_ColumnsWidthFixed               = 1 << 14,  // Default if ScrollX is on. Columns will default to use _WidthFixed or _WidthAutoResize policy (if Resizable is off). Read description above for more details.
     ImGuiTableFlags_SameWidths                      = 1 << 15,  // Make all columns the same widths which is useful with Fixed columns policy (but granted by default with Stretch policy + no resize). Implicitly enable ImGuiTableFlags_NoKeepColumnsVisible and disable ImGuiTableFlags_Resizable.
-    ImGuiTableFlags_NoHeadersWidth                  = 1 << 16,  // Disable headers' contribution to automatic width calculation.
     ImGuiTableFlags_NoHostExtendY                   = 1 << 17,  // Disable extending table past the limit set by outer_size.y. Only meaningful when neither ScrollX nor ScrollY are set (data below the limit will be clipped and not visible)
     ImGuiTableFlags_NoKeepColumnsVisible            = 1 << 18,  // Disable keeping column always minimally visible when ScrollX is off and table gets too small.
     ImGuiTableFlags_PreciseWidths                   = 1 << 19,  // Disable distributing remainder width to stretched columns (width allocation on a 100-wide table with 3 columns: Without this flag: 33,33,34. With this flag: 33,33,33). With larger number of columns, resizing will appear to be less smooth.
+    // Clipping
     ImGuiTableFlags_NoClip                          = 1 << 20,  // Disable clipping rectangle for every individual columns (reduce draw command count, items will be able to overflow into other columns). Generally incompatible with TableSetupScrollFreeze().
     // Padding
     ImGuiTableFlags_PadOuterX                       = 1 << 21,  // Default if BordersOuterV is on. Enable outer-most padding.

imgui_demo.cpp

@@ -4742,7 +4742,6 @@ static void ShowDemoWindowTables()
                 if (ImGui::CheckboxFlags("ImGuiTableFlags_ColumnsWidthFixed", &flags, ImGuiTableFlags_ColumnsWidthFixed))
                     flags &= ~ImGuiTableFlags_ColumnsWidthStretch; // Can't specify both sizing polices so we clear the other
                 ImGui::SameLine(); HelpMarker("[Default if ScrollX is on]\nEnlarge as needed: enable scrollbar if ScrollX is enabled, otherwise extend parent window's contents rectangle. Only Fixed columns allowed. Stretched columns will calculate their width assuming no scrolling.");
-                ImGui::CheckboxFlags("ImGuiTableFlags_NoHeadersWidth", &flags, ImGuiTableFlags_NoHeadersWidth);
                 ImGui::CheckboxFlags("ImGuiTableFlags_NoHostExtendY", &flags, ImGuiTableFlags_NoHostExtendY);
                 ImGui::CheckboxFlags("ImGuiTableFlags_NoKeepColumnsVisible", &flags, ImGuiTableFlags_NoKeepColumnsVisible);
                 ImGui::SameLine(); HelpMarker("Only available if ScrollX is disabled.");

imgui_tables.cpp

@@ -727,7 +727,7 @@ void ImGui::TableUpdateLayout(ImGuiTable* table)
             const float content_width_body = ImMax(column->ContentMaxXFrozen, column->ContentMaxXUnfrozen) - column->WorkMinX;
             const float content_width_headers = column->ContentMaxXHeadersIdeal - column->WorkMinX;
             float width_auto = content_width_body;
-            if (!(table->Flags & ImGuiTableFlags_NoHeadersWidth) && !(column->Flags & ImGuiTableColumnFlags_NoHeaderWidth))
+            if (!(column->Flags & ImGuiTableColumnFlags_NoHeaderWidth))
                 width_auto = ImMax(width_auto, content_width_headers);
             width_auto = ImMax(width_auto, min_column_width);