Tables: Fixed TableAngledHeadersRow() creating an infinite horizontal scrolling region when the table is hosted in a viewport with negative coordinates.

docs/CHANGELOG.txt

@@ -51,6 +51,9 @@ Other changes:
   value is being modified. (#8242)
 - InputText: Added sanity check to detect some cases of passing a non
   zero-terminated input buffer.
+- Tables: Fixed TableAngledHeadersRow() creating an infinite horizontal
+  scrolling region when the table is hosted in a viewport with negative
+  coordinates.
 - Tables, MultiSelect: Fixed an issue where column width may be mismeasured
   when calling BeginMultiSelect() while inside a table. (#8250)
 - Drags: Added ImGuiSliderFlags_NoSpeedTweaks flag to disable keyboard

imgui_tables.cpp

@@ -3299,7 +3299,7 @@ void ImGui::TableAngledHeadersRowEx(ImGuiID row_id, float angle, float max_label
     const ImVec2 align = g.Style.TableAngledHeadersTextAlign;
 
     // Draw background and labels in first pass, then all borders.
-    float max_x = 0.0f;
+    float max_x = -FLT_MAX;
     for (int pass = 0; pass < 2; pass++)
         for (int order_n = 0; order_n < data_count; order_n++)
         {