Demo: Style Editor: clarify how _CalcCircleAutoSegmentCount() doesn't always get exact final segment count. (#7731)

imgui_demo.cpp

@@ -6932,10 +6932,10 @@ void ImGui::ShowStyleEditor(ImGuiStyle* ref)
                 ImGui::SetNextWindowPos(ImGui::GetCursorScreenPos());
             if (show_samples && ImGui::BeginTooltip())
             {
-                ImGui::TextUnformatted("(R = radius, N = number of segments)");
+                ImGui::TextUnformatted("(R = radius, N = approx number of segments)");
                 ImGui::Spacing();
                 ImDrawList* draw_list = ImGui::GetWindowDrawList();
-                const float min_widget_width = ImGui::CalcTextSize("N: MMM\nR: MMM").x;
+                const float min_widget_width = ImGui::CalcTextSize("R: MMM\nN: MMM").x;
                 for (int n = 0; n < 8; n++)
                 {
                     const float RAD_MIN = 5.0f;
@@ -6944,6 +6944,7 @@ void ImGui::ShowStyleEditor(ImGuiStyle* ref)
 
                     ImGui::BeginGroup();
 
+                    // N is not always exact here due to how PathArcTo() function work internally
                     ImGui::Text("R: %.f\nN: %d", rad, draw_list->_CalcCircleAutoSegmentCount(rad));
 
                     const float canvas_width = IM_MAX(min_widget_width, rad * 2.0f);