Bits / comments

docs/CHANGELOG.txt

@@ -87,11 +87,12 @@ Other changes:
 - Windows:
   - BeginChild(): Added ImGuiChildFlags_ResizeX and ImGuiChildFlags_ResizeY to allow resizing
     child windows from the bottom/right border (toward layout direction). Resized child windows
-    settings are saved and persistent in .ini file. (#1666, #1496, #1395, #1710)
+    settings are saved and persistent in .ini file. (#1710)
   - BeginChild(): Added ImGuiChildFlags_Border as a replacement for 'bool border = true' parameter.
   - BeginChild(): Internal name used by child windows now omits the hash/id if the child
-    window is submitted in root of id stack of parent window. Makes debugging/metrics easier
-    and shorter to read in many cases.
+    window is submitted in root of id stack of parent window.
+    So "Parent/Child_XXXXXXX" becomes "Parent/Child" when in root of id stack.
+    Makes debugging/metrics easier and shorter to read in many cases.
   - Popups: clarified meaning of 'p_open != NULL' in BeginPopupModal() + set back user value
     to false when popup is closed in ways other than clicking the close button. (#6900)
   - Double-clicking lower-left resize grip auto-resize (like lower-right one).
@@ -182,6 +183,7 @@ Other changes:
 - ImDrawList: Added AddEllipse(), AddEllipseFilled(), PathEllipticalArcTo(). (#2743) [@Doohl]
 - ImVector: Added find_index() helper.
 - Demo: Added "Drag and Drop -> Tooltip at target location" demo.
+- Demo: Added "Layout -> Child Windows -> Manual-resize" demo. (#1710)
 - Backends: GLFW: Clear emscripten's MouseWheel callback before shutdown. (#6790, #6096, #4019) [@halx99]
 - Backends: GLFW: Added support for F13 to F24 function keys. (#6891)
 - Backends: SDL2, SDL3: Added support for F13 to F24 function keys, AppBack, AppForward. (#6891)

imgui.h

@@ -329,9 +329,9 @@ namespace ImGui
     //   Some information such as 'flags' or 'p_open' will only be considered by the first call to Begin().
     // - Begin() return false to indicate the window is collapsed or fully clipped, so you may early out and omit submitting
     //   anything to the window. Always call a matching End() for each Begin() call, regardless of its return value!
-    //   [Important: due to legacy reason, this is inconsistent with most other functions such as BeginMenu/EndMenu,
-    //    BeginPopup/EndPopup, etc. where the EndXXX call should only be called if the corresponding BeginXXX function
-    //    returned true. Begin and BeginChild are the only odd ones out. Will be fixed in a future update.]
+    //   [Important: due to legacy reason, Begin/End and BeginChild/EndChild are inconsistent with all other functions
+    //    such as BeginMenu/EndMenu, BeginPopup/EndPopup, etc. where the EndXXX call should only be called if the corresponding
+    //    BeginXXX function returned true. Begin and BeginChild are the only odd ones out. Will be fixed in a future update.]
     // - Note that the bottom of window stack always contains a window called "Debug".
     IMGUI_API bool          Begin(const char* name, bool* p_open = NULL, ImGuiWindowFlags flags = 0);
     IMGUI_API void          End();
@@ -339,11 +339,11 @@ namespace ImGui
     // Child Windows
     // - Use child windows to begin into a self-contained independent scrolling/clipping regions within a host window. Child windows can embed their own child.
     // - For each independent axis of 'size': ==0.0f: use remaining host window size / >0.0f: fixed size / <0.0f: use remaining window size minus abs(size) / Each axis can use a different mode, e.g. ImVec2(0,400).
-    // - BeginChild() returns false to indicate the window is collapsed or fully clipped, so you may early out and omit submitting anything to the window.
-    //   Always call a matching EndChild() for each BeginChild() call, regardless of its return value.
-    //   [Important: due to legacy reason, this is inconsistent with most other functions such as BeginMenu/EndMenu,
-    //    BeginPopup/EndPopup, etc. where the EndXXX call should only be called if the corresponding BeginXXX function
-    //    returned true. Begin and BeginChild are the only odd ones out. Will be fixed in a future update.]
+    // - BeginChild() returns false to indicate the window is collapsed or fully clipped, so you may early out and omit submitting
+    //   anything to the window. Always call a matching EndChild() for each BeginChild() call, regardless of its return value.
+    //   [Important: due to legacy reason, Begin/End and BeginChild/EndChild are inconsistent with all other functions
+    //    such as BeginMenu/EndMenu, BeginPopup/EndPopup, etc. where the EndXXX call should only be called if the corresponding
+    //    BeginXXX function returned true. Begin and BeginChild are the only odd ones out. Will be fixed in a future update.]
     IMGUI_API bool          BeginChild(const char* str_id, const ImVec2& size = ImVec2(0, 0), ImGuiChildFlags child_flags = 0, ImGuiWindowFlags window_flags = 0);
     IMGUI_API bool          BeginChild(ImGuiID id, const ImVec2& size = ImVec2(0, 0), ImGuiChildFlags child_flags = 0, ImGuiWindowFlags window_flags = 0);
     IMGUI_API void          EndChild();

imgui_demo.cpp

@@ -2769,10 +2769,10 @@ static void ShowDemoWindowLayout()
         {
             HelpMarker("Drag bottom border to resize. Double-click bottom border to auto-fit to vertical contents.");
             ImGui::PushStyleColor(ImGuiCol_ChildBg, ImGui::GetStyleColorVec4(ImGuiCol_FrameBg));
-            ImGui::BeginChild("ResizableChild", ImVec2(-FLT_MIN, ImGui::GetTextLineHeightWithSpacing() * 8), ImGuiChildFlags_Border | ImGuiChildFlags_ResizeY);
-            ImGui::PopStyleColor();
+            if (ImGui::BeginChild("ResizableChild", ImVec2(-FLT_MIN, ImGui::GetTextLineHeightWithSpacing() * 8), ImGuiChildFlags_Border | ImGuiChildFlags_ResizeY))
                 for (int n = 0; n < 10; n++)
                     ImGui::Text("Line %04d", n);
+            ImGui::PopStyleColor();
             ImGui::EndChild();
         }
 
@@ -5065,6 +5065,7 @@ static void ShowDemoWindowTables()
         ImGui::CheckboxFlags("ImGuiTreeNodeFlags_SpanFullWidth", &tree_node_flags, ImGuiTreeNodeFlags_SpanFullWidth);
         ImGui::CheckboxFlags("ImGuiTreeNodeFlags_SpanAllColumns", &tree_node_flags, ImGuiTreeNodeFlags_SpanAllColumns);
 
+        HelpMarker("See \"Columns flags\" section to configure how indentation is applied to individual columns.");
         if (ImGui::BeginTable("3ways", 3, flags))
         {
             // The first column will use the default _WidthStretch when ScrollX is Off and _WidthFixed when ScrollX is On

imgui_tables.cpp

@@ -321,7 +321,7 @@ bool    ImGui::BeginTableEx(const char* name, ImGuiID id, int columns_count, ImG
     const ImVec2 avail_size = GetContentRegionAvail();
     const ImVec2 actual_outer_size = CalcItemSize(outer_size, ImMax(avail_size.x, 1.0f), use_child_window ? ImMax(avail_size.y, 1.0f) : 0.0f);
     const ImRect outer_rect(outer_window->DC.CursorPos, outer_window->DC.CursorPos + actual_outer_size);
-    const bool outer_window_is_measuring_size = (outer_window->AutoFitFramesX > 0) || (outer_window->AutoFitFramesY > 0); // Doesn't apply to auto-fitting windows!
+    const bool outer_window_is_measuring_size = (outer_window->AutoFitFramesX > 0) || (outer_window->AutoFitFramesY > 0); // Doesn't apply to AlwaysAutoResize windows!
     if (use_child_window && IsClippedEx(outer_rect, 0) && !outer_window_is_measuring_size)
     {
         ItemSize(outer_rect);