Debug Tools: Metrics: Added "Show groups rectangles" in tools.

docs/CHANGELOG.txt

@@ -105,7 +105,8 @@ Other changes:
   Was most often noticable when using an horizontal scrollbar. (#6789)
 - Misc: Most text functions also treat "%.*s" (along with "%s") specially to avoid formatting. (#3466, #6846)
 - IO: Setting io.WantSetMousePos ignores incoming MousePos events. (#6837, #228) [@bertaye]
-- Debug Tools: Metrics: Added log recent alloc/free calls.
+- Debug Tools: Metrics: Added log of recent alloc/free calls.
+- Debug Tools: Metrics: Added "Show groups rectangles" in tools.
 - ImDrawList: Added AddEllipse(), AddEllipseFilled(), PathEllipticalArcTo(). (#2743) [@Doohl]
 - ImVector: Added find_index() helper.
 - Backends: GLFW: Clear emscripten's MouseWheel callback before shutdown. (#6790, #6096, #4019) [@halx99]

imgui.cpp

@@ -9954,7 +9954,8 @@ void ImGui::EndGroup()
         g.LastItemData.StatusFlags |= ImGuiItemStatusFlags_Deactivated;
 
     g.GroupStack.pop_back();
-    //window->DrawList->AddRect(group_bb.Min, group_bb.Max, IM_COL32(255,0,255,255));   // [Debug]
+    if (g.DebugShowGroupRects)
+        window->DrawList->AddRect(group_bb.Min, group_bb.Max, IM_COL32(255,0,255,255));   // [Debug]
 }
 
 
@@ -13888,6 +13889,7 @@ void ImGui::ShowMetricsWindow(bool* p_open)
                 Unindent();
             }
         }
+        Checkbox("Show groups rectangles", &g.DebugShowGroupRects); // Storing in context as this is used by group code and prefers to be in hot-data
 
         Checkbox("Debug Begin/BeginChild return value", &io.ConfigDebugBeginReturnValueLoop);
         SameLine();
@@ -14064,11 +14066,12 @@ void ImGui::ShowMetricsWindow(bool* p_open)
     {
         ImGuiDebugAllocInfo* info = &g.DebugAllocInfo;
         Text("%d current allocations", info->TotalAllocCount - info->TotalFreeCount);
+        Text("Recent frames with allocations:");
         int buf_size = IM_ARRAYSIZE(info->LastEntriesBuf);
         for (int n = buf_size - 1; n >= 0; n--)
         {
             ImGuiDebugAllocEntry* entry = &info->LastEntriesBuf[(info->LastEntriesIdx - n + buf_size) % buf_size];
-            BulletText("Frame %06d: %+3d ( %2d malloc, %2d free )", entry->FrameCount, entry->AllocCount - entry->FreeCount, entry->AllocCount, entry->FreeCount);
+            BulletText("Frame %06d: %+3d ( %2d malloc, %2d free )%s", entry->FrameCount, entry->AllocCount - entry->FreeCount, entry->AllocCount, entry->FreeCount, (n == 0) ? " (most recent)" : "");
         }
         TreePop();
     }

imgui_internal.h

@@ -1953,6 +1953,7 @@ struct ImGuiContext
     ImGuiNextItemData       NextItemData;                       // Storage for SetNextItem** functions
     ImGuiLastItemData       LastItemData;                       // Storage for last submitted item (setup by ItemAdd)
     ImGuiNextWindowData     NextWindowData;                     // Storage for SetNextWindow** functions
+    bool                    DebugShowGroupRects;
 
     // Shared stacks
     ImVector<ImGuiColorMod>     ColorStack;                     // Stack for PushStyleColor()/PopStyleColor() - inherited by Begin()
@@ -2225,6 +2226,7 @@ struct ImGuiContext
 
         CurrentFocusScopeId = 0;
         CurrentItemFlags = ImGuiItemFlags_None;
+        DebugShowGroupRects = false;
         BeginMenuCount = 0;
 
         NavWindow = NULL;