Updated ImGui.

3rdparty/dear-imgui/imgui.cpp

@@ -7093,7 +7093,7 @@ static void ImGui::ErrorCheckNewFrameSanityChecks()
     ImGuiContext& g = *GImGui;
 
     // Check user IM_ASSERT macro
-    // (IF YOU GET A WARNING OR COMPILE ERROR HERE: it means you assert macro is incorrectly defined!
+    // (IF YOU GET A WARNING OR COMPILE ERROR HERE: it means your assert macro is incorrectly defined!
     //  If your macro uses multiple statements, it NEEDS to be surrounded by a 'do { ... } while (0)' block.
     //  This is a common C/C++ idiom to allow multiple statements macros to be used in control flow blocks.)
     // #define IM_ASSERT(EXPR)   if (SomeCode(EXPR)) SomeMoreCode();                    // Wrong!
@@ -10568,9 +10568,9 @@ static void ImGui::UpdateViewportsNewFrame()
         ImGuiViewportP* viewport = g.Viewports[n];
 
         // Lock down space taken by menu bars and status bars, reset the offset for fucntions like BeginMainMenuBar() to alter them again.
-        viewport->WorkOffsetMin = viewport->CurrWorkOffsetMin;
-        viewport->WorkOffsetMax = viewport->CurrWorkOffsetMax;
-        viewport->CurrWorkOffsetMin = viewport->CurrWorkOffsetMax = ImVec2(0.0f, 0.0f);
+        viewport->WorkOffsetMin = viewport->BuildWorkOffsetMin;
+        viewport->WorkOffsetMax = viewport->BuildWorkOffsetMax;
+        viewport->BuildWorkOffsetMin = viewport->BuildWorkOffsetMax = ImVec2(0.0f, 0.0f);
         viewport->UpdateWorkRect();
     }
 }

3rdparty/dear-imgui/imgui.h

@@ -723,6 +723,7 @@ namespace ImGui
     IMGUI_API int                   TableGetRowIndex();                         // return current row index.
     IMGUI_API const char*           TableGetColumnName(int column_n = -1);      // return "" if column didn't have a name declared by TableSetupColumn(). Pass -1 to use current column.
     IMGUI_API ImGuiTableColumnFlags TableGetColumnFlags(int column_n = -1);     // return column flags so you can query their Enabled/Visible/Sorted/Hovered status flags. Pass -1 to use current column.
+    IMGUI_API void                  TableSetColumnEnabled(int column_n, bool v);// change enabled/disabled state of a column, set to false to hide the column. Note that end-user can use the context menu to change this themselves (right-click in headers, or right-click in columns body with ImGuiTableFlags_ContextMenuInBody)
     IMGUI_API void                  TableSetBgColor(ImGuiTableBgTarget target, ImU32 color, int column_n = -1);  // change the color of a cell, row, or column. See ImGuiTableBgTarget_ flags for details.
 
     // Legacy Columns API (2020: prefer using Tables!)

3rdparty/dear-imgui/imgui_internal.h

@@ -1180,14 +1180,21 @@ struct ImGuiViewportP : public ImGuiViewport
 
     ImVec2              WorkOffsetMin;          // Work Area: Offset from Pos to top-left corner of Work Area. Generally (0,0) or (0,+main_menu_bar_height). Work Area is Full Area but without menu-bars/status-bars (so WorkArea always fit inside Pos/Size!)
     ImVec2              WorkOffsetMax;          // Work Area: Offset from Pos+Size to bottom-right corner of Work Area. Generally (0,0) or (0,-status_bar_height).
-    ImVec2              CurrWorkOffsetMin;      // Work Area: Offset being built/increased during current frame
-    ImVec2              CurrWorkOffsetMax;      // Work Area: Offset being built/decreased during current frame
+    ImVec2              BuildWorkOffsetMin;     // Work Area: Offset being built during current frame. Generally >= 0.0f.
+    ImVec2              BuildWorkOffsetMax;     // Work Area: Offset being built during current frame. Generally <= 0.0f.
 
-    ImGuiViewportP()                { DrawListsLastFrame[0] = DrawListsLastFrame[1] = -1; DrawLists[0] = DrawLists[1] = NULL; }
-    ~ImGuiViewportP()               { if (DrawLists[0]) IM_DELETE(DrawLists[0]); if (DrawLists[1]) IM_DELETE(DrawLists[1]); }
-    ImRect  GetMainRect() const     { return ImRect(Pos.x, Pos.y, Pos.x + Size.x, Pos.y + Size.y); }
-    ImRect  GetWorkRect() const     { return ImRect(WorkPos.x, WorkPos.y, WorkPos.x + WorkSize.x, WorkPos.y + WorkSize.y); }
-    void    UpdateWorkRect()        { WorkPos = ImVec2(Pos.x + WorkOffsetMin.x, Pos.y + WorkOffsetMin.y); WorkSize = ImVec2(ImMax(0.0f, Size.x - WorkOffsetMin.x + WorkOffsetMax.x), ImMax(0.0f, Size.y - WorkOffsetMin.y + WorkOffsetMax.y)); }
+    ImGuiViewportP()    { DrawListsLastFrame[0] = DrawListsLastFrame[1] = -1; DrawLists[0] = DrawLists[1] = NULL; }
+    ~ImGuiViewportP()   { if (DrawLists[0]) IM_DELETE(DrawLists[0]); if (DrawLists[1]) IM_DELETE(DrawLists[1]); }
+
+    // Calculate work rect pos/size given a set of offset (we have 1 pair of offset for rect locked from last frame data, and 1 pair for currently building rect)
+    ImVec2  CalcWorkRectPos(const ImVec2& off_min) const                            { return ImVec2(Pos.x + off_min.x, Pos.y + off_min.y); }
+    ImVec2  CalcWorkRectSize(const ImVec2& off_min, const ImVec2& off_max) const    { return ImVec2(ImMax(0.0f, Size.x - off_min.x + off_max.x), ImMax(0.0f, Size.y - off_min.y + off_max.y)); }
+    void    UpdateWorkRect()            { WorkPos = CalcWorkRectPos(WorkOffsetMin); WorkSize = CalcWorkRectSize(WorkOffsetMin, WorkOffsetMax); } // Update public fields
+
+    // Helpers to retrieve ImRect (we don't need to store BuildWorkRect as every access tend to change it, hence the code asymmetry)
+    ImRect  GetMainRect() const         { return ImRect(Pos.x, Pos.y, Pos.x + Size.x, Pos.y + Size.y); }
+    ImRect  GetWorkRect() const         { return ImRect(WorkPos.x, WorkPos.y, WorkPos.x + WorkSize.x, WorkPos.y + WorkSize.y); }
+    ImRect  GetBuildWorkRect() const    { ImVec2 pos = CalcWorkRectPos(BuildWorkOffsetMin); ImVec2 size = CalcWorkRectSize(BuildWorkOffsetMin, BuildWorkOffsetMax); return ImRect(pos.x, pos.y, pos.x + size.x, pos.y + size.y); }
 };
 
 //-----------------------------------------------------------------------------
@@ -1878,6 +1885,7 @@ enum ImGuiTabBarFlagsPrivate_
 // Extend ImGuiTabItemFlags_
 enum ImGuiTabItemFlagsPrivate_
 {
+    ImGuiTabItemFlags_SectionMask_              = ImGuiTabItemFlags_Leading | ImGuiTabItemFlags_Trailing,
     ImGuiTabItemFlags_NoCloseButton             = 1 << 20,  // Track whether p_open was set or not (we'll need this info on the next frame to recompute ContentWidth during layout)
     ImGuiTabItemFlags_Button                    = 1 << 21   // Used by TabItemButton, change the tab item behavior to mimic a button
 };
@@ -1923,7 +1931,7 @@ struct ImGuiTabBar
     float               ScrollingRectMinX;
     float               ScrollingRectMaxX;
     ImGuiID             ReorderRequestTabId;
-    ImS8                ReorderRequestDir;
+    ImS16               ReorderRequestOffset;
     ImS8                BeginCount;
     bool                WantLayout;
     bool                VisibleTabWasSubmitted;
@@ -2309,6 +2317,7 @@ namespace ImGui
     IMGUI_API ImGuiWindow*  GetTopMostPopupModal();
     IMGUI_API ImVec2        FindBestWindowPosForPopup(ImGuiWindow* window);
     IMGUI_API ImVec2        FindBestWindowPosForPopupEx(const ImVec2& ref_pos, const ImVec2& size, ImGuiDir* last_dir, const ImRect& r_outer, const ImRect& r_avoid, ImGuiPopupPositionPolicy policy);
+    IMGUI_API bool          BeginViewportSideBar(const char* name, ImGuiViewport* viewport, ImGuiDir dir, float size, ImGuiWindowFlags window_flags);
 
     // Gamepad/Keyboard Navigation
     IMGUI_API void          NavInitWindow(ImGuiWindow* window, bool force_reinit);
@@ -2361,7 +2370,6 @@ namespace ImGui
 
     // Tables: Candidates for public API
     IMGUI_API void          TableOpenContextMenu(int column_n = -1);
-    IMGUI_API void          TableSetColumnEnabled(int column_n, bool enabled);
     IMGUI_API void          TableSetColumnWidth(int column_n, float width);
     IMGUI_API void          TableSetColumnSortDirection(int column_n, ImGuiSortDirection sort_direction, bool append_to_sort_specs);
     IMGUI_API int           TableGetHoveredColumn(); // May use (TableGetColumnFlags() & ImGuiTableColumnFlags_IsHovered) instead. Return hovered column. return -1 when table is not hovered. return columns_count if the unused space at the right of visible columns is hovered.
@@ -2415,7 +2423,8 @@ namespace ImGui
     IMGUI_API ImGuiTabItem* TabBarFindTabByID(ImGuiTabBar* tab_bar, ImGuiID tab_id);
     IMGUI_API void          TabBarRemoveTab(ImGuiTabBar* tab_bar, ImGuiID tab_id);
     IMGUI_API void          TabBarCloseTab(ImGuiTabBar* tab_bar, ImGuiTabItem* tab);
-    IMGUI_API void          TabBarQueueReorder(ImGuiTabBar* tab_bar, const ImGuiTabItem* tab, int dir);
+    IMGUI_API void          TabBarQueueReorder(ImGuiTabBar* tab_bar, const ImGuiTabItem* tab, int offset);
+    IMGUI_API void          TabBarQueueReorderFromMousePos(ImGuiTabBar* tab_bar, const ImGuiTabItem* tab, ImVec2 mouse_pos);
     IMGUI_API bool          TabBarProcessReorder(ImGuiTabBar* tab_bar);
     IMGUI_API bool          TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open, ImGuiTabItemFlags flags);
     IMGUI_API ImVec2        TabItemCalcSize(const char* label, bool has_close_button);

3rdparty/dear-imgui/imgui_tables.cpp

@@ -1491,6 +1491,9 @@ const char* ImGui::TableGetColumnName(const ImGuiTable* table, int column_n)
     return &table->ColumnsNames.Buf[column->NameOffset];
 }
 
+// Request enabling/disabling a column (often perceived as "showing/hiding" from users point of view)
+// Note that end-user can use the context menu to change this themselves (right-click in headers, or right-click in columns body with ImGuiTableFlags_ContextMenuInBody)
+// Request will be applied during next layout, which happens on the first call to TableNextRow() after BeginTable()
 // For the getter you can use (TableGetColumnFlags() & ImGuiTableColumnFlags_IsEnabled)
 void ImGui::TableSetColumnEnabled(int column_n, bool enabled)
 {

3rdparty/dear-imgui/imgui_widgets.cpp

@@ -2082,6 +2082,7 @@ static const char* ImAtoi(const char* src, TYPE* output)
 // - stb_sprintf.h supports several new modifiers which format numbers in a way that also makes them incompatible atof/atoi.
 static void SanitizeFormatString(const char* fmt, char* fmt_out, size_t fmt_out_size)
 {
+    IM_UNUSED(fmt_out_size);
     const char* fmt_end = ImParseFormatFindEnd(fmt);
     IM_ASSERT((size_t)(fmt_end - fmt + 1) < fmt_out_size); // Format is too long, let us know if this happens to you!
     while (fmt < fmt_end)
@@ -4819,7 +4820,8 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
             char* p = buf;
             while (*p == '#' || ImCharIsBlankA(*p))
                 p++;
-            i[0] = i[1] = i[2] = i[3] = 0;
+            i[0] = i[1] = i[2] = 0;
+            i[3] = 0xFF; // alpha default to 255 is not parsed by scanf (e.g. inputting #FFFFFF omitting alpha)
             if (alpha)
                 sscanf(p, "%02X%02X%02X%02X", (unsigned int*)&i[0], (unsigned int*)&i[1], (unsigned int*)&i[2], (unsigned int*)&i[3]); // Treat at unsigned (%X is unsigned)
             else
@@ -6617,46 +6619,63 @@ void ImGui::EndMenuBar()
     window->DC.MenuBarAppending = false;
 }
 
-bool ImGui::BeginMainMenuBar()
+// Important: calling order matters!
+// FIXME: Somehow overlapping with docking tech.
+// FIXME: The "rect-cut" aspect of this could be formalized into a lower-level helper (rect-cut: https://halt.software/dead-simple-layouts)
+bool ImGui::BeginViewportSideBar(const char* name, ImGuiViewport* viewport_p, ImGuiDir dir, float axis_size, ImGuiWindowFlags window_flags)
 {
-    ImGuiContext& g = *GImGui;
-    ImGuiViewportP* viewport = (ImGuiViewportP*)(void*)GetMainViewport();
-    ImGuiWindow* menu_bar_window = FindWindowByName("##MainMenuBar");
-
-    // For the main menu bar, which cannot be moved, we honor g.Style.DisplaySafeAreaPadding to ensure text can be visible on a TV set.
-    g.NextWindowData.MenuBarOffsetMinVal = ImVec2(g.Style.DisplaySafeAreaPadding.x, ImMax(g.Style.DisplaySafeAreaPadding.y - g.Style.FramePadding.y, 0.0f));
+    IM_ASSERT(dir != ImGuiDir_None);
 
-    // Get our rectangle at the top of the work area
-    if (menu_bar_window == NULL || menu_bar_window->BeginCount == 0)
+    ImGuiWindow* bar_window = FindWindowByName(name);
+    if (bar_window == NULL || bar_window->BeginCount == 0)
     {
-        // Set window position
-        // We don't attempt to calculate our height ahead, as it depends on the per-viewport font size.
-        // However menu-bar will affect the minimum window size so we'll get the right height.
-        ImVec2 menu_bar_pos = viewport->Pos + viewport->CurrWorkOffsetMin;
-        ImVec2 menu_bar_size = ImVec2(viewport->Size.x - viewport->CurrWorkOffsetMin.x + viewport->CurrWorkOffsetMax.x, 1.0f);
-        SetNextWindowPos(menu_bar_pos);
-        SetNextWindowSize(menu_bar_size);
+        // Calculate and set window size/position
+        ImGuiViewportP* viewport = (ImGuiViewportP*)(void*)(viewport_p ? viewport_p : GetMainViewport());
+        ImRect avail_rect = viewport->GetBuildWorkRect();
+        ImGuiAxis axis = (dir == ImGuiDir_Up || dir == ImGuiDir_Down) ? ImGuiAxis_Y : ImGuiAxis_X;
+        ImVec2 pos = avail_rect.Min;
+        if (dir == ImGuiDir_Right || dir == ImGuiDir_Down)
+            pos[axis] = avail_rect.Max[axis] - axis_size;
+        ImVec2 size = avail_rect.GetSize();
+        size[axis] = axis_size;
+        SetNextWindowPos(pos);
+        SetNextWindowSize(size);
+
+        // Report our size into work area (for next frame) using actual window size
+        if (dir == ImGuiDir_Up || dir == ImGuiDir_Left)
+            viewport->BuildWorkOffsetMin[axis] += axis_size;
+        else if (dir == ImGuiDir_Down || dir == ImGuiDir_Right)
+            viewport->BuildWorkOffsetMax[axis] -= axis_size;
     }
 
-    // Create window
+    window_flags |= ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove;
     PushStyleVar(ImGuiStyleVar_WindowRounding, 0.0f);
-    PushStyleVar(ImGuiStyleVar_WindowMinSize, ImVec2(0, 0)); // Lift normal size constraint, however the presence of a menu-bar will give us the minimum height we want.
-    ImGuiWindowFlags window_flags = ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_MenuBar;
-    bool is_open = Begin("##MainMenuBar", NULL, window_flags) && BeginMenuBar();
+    PushStyleVar(ImGuiStyleVar_WindowMinSize, ImVec2(0, 0)); // Lift normal size constraint
+    bool is_open = Begin(name, NULL, window_flags);
     PopStyleVar(2);
 
-    // Report our size into work area (for next frame) using actual window size
-    menu_bar_window = GetCurrentWindow();
-    if (menu_bar_window->BeginCount == 1)
-        viewport->CurrWorkOffsetMin.y += menu_bar_window->Size.y;
+    return is_open;
+}
+
+bool ImGui::BeginMainMenuBar()
+{
+    ImGuiContext& g = *GImGui;
+    ImGuiViewportP* viewport = (ImGuiViewportP*)(void*)GetMainViewport();
 
+    // For the main menu bar, which cannot be moved, we honor g.Style.DisplaySafeAreaPadding to ensure text can be visible on a TV set.
+    // FIXME: This could be generalized as an opt-in way to clamp window->DC.CursorStartPos to avoid SafeArea?
+    // FIXME: Consider removing support for safe area down the line... it's messy. Nowadays consoles have support for TV calibration in OS settings.
+    g.NextWindowData.MenuBarOffsetMinVal = ImVec2(g.Style.DisplaySafeAreaPadding.x, ImMax(g.Style.DisplaySafeAreaPadding.y - g.Style.FramePadding.y, 0.0f));
+    ImGuiWindowFlags window_flags = ImGuiWindowFlags_NoScrollbar | ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_MenuBar;
+    float height = GetFrameHeight();
+    bool is_open = BeginViewportSideBar("##MainMenuBar", viewport, ImGuiDir_Up, height, window_flags);
     g.NextWindowData.MenuBarOffsetMinVal = ImVec2(0.0f, 0.0f);
-    if (!is_open)
-    {
+
+    if (is_open)
+        BeginMenuBar();
+    else
         End();
-        return false;
-    }
-    return true; //-V1020
+    return is_open;
 }
 
 void ImGui::EndMainMenuBar()
@@ -6958,12 +6977,17 @@ ImGuiTabBar::ImGuiTabBar()
     LastTabItemIdx = -1;
 }
 
+static inline int TabItemGetSectionIdx(const ImGuiTabItem* tab)
+{
+    return (tab->Flags & ImGuiTabItemFlags_Leading) ? 0 : (tab->Flags & ImGuiTabItemFlags_Trailing) ? 2 : 1;
+}
+
 static int IMGUI_CDECL TabItemComparerBySection(const void* lhs, const void* rhs)
 {
     const ImGuiTabItem* a = (const ImGuiTabItem*)lhs;
     const ImGuiTabItem* b = (const ImGuiTabItem*)rhs;
-    const int a_section = (a->Flags & ImGuiTabItemFlags_Leading) ? 0 : (a->Flags & ImGuiTabItemFlags_Trailing) ? 2 : 1;
-    const int b_section = (b->Flags & ImGuiTabItemFlags_Leading) ? 0 : (b->Flags & ImGuiTabItemFlags_Trailing) ? 2 : 1;
+    const int a_section = TabItemGetSectionIdx(a);
+    const int b_section = TabItemGetSectionIdx(b);
     if (a_section != b_section)
         return a_section - b_section;
     return (int)(a->IndexDuringLayout - b->IndexDuringLayout);
@@ -7132,11 +7156,11 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
         tab->IndexDuringLayout = (ImS16)tab_dst_n;
 
         // We will need sorting if tabs have changed section (e.g. moved from one of Leading/Central/Trailing to another)
-        int curr_tab_section_n = (tab->Flags & ImGuiTabItemFlags_Leading) ? 0 : (tab->Flags & ImGuiTabItemFlags_Trailing) ? 2 : 1;
+        int curr_tab_section_n = TabItemGetSectionIdx(tab);
         if (tab_dst_n > 0)
         {
             ImGuiTabItem* prev_tab = &tab_bar->Tabs[tab_dst_n - 1];
-            int prev_tab_section_n = (prev_tab->Flags & ImGuiTabItemFlags_Leading) ? 0 : (prev_tab->Flags & ImGuiTabItemFlags_Trailing) ? 2 : 1;
+            int prev_tab_section_n = TabItemGetSectionIdx(prev_tab);
             if (curr_tab_section_n == 0 && prev_tab_section_n != 0)
                 need_sort_by_section = true;
             if (prev_tab_section_n == 2 && curr_tab_section_n != 2)
@@ -7208,7 +7232,7 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
         const bool has_close_button = (tab->Flags & ImGuiTabItemFlags_NoCloseButton) ? false : true;
         tab->ContentWidth = TabItemCalcSize(tab_name, has_close_button).x;
 
-        int section_n = (tab->Flags & ImGuiTabItemFlags_Leading) ? 0 : (tab->Flags & ImGuiTabItemFlags_Trailing) ? 2 : 1;
+        int section_n = TabItemGetSectionIdx(tab);
         ImGuiTabBarSection* section = &sections[section_n];
         section->Width += tab->ContentWidth + (section_n == curr_section_n ? g.Style.ItemInnerSpacing.x : 0.0f);
         curr_section_n = section_n;
@@ -7263,7 +7287,7 @@ static void ImGui::TabBarLayout(ImGuiTabBar* tab_bar)
             if (shrinked_width < 0.0f)
                 continue;
 
-            int section_n = (tab->Flags & ImGuiTabItemFlags_Leading) ? 0 : (tab->Flags & ImGuiTabItemFlags_Trailing) ? 2 : 1;
+            int section_n = TabItemGetSectionIdx(tab);
             sections[section_n].Width -= (tab->Width - shrinked_width);
             tab->Width = shrinked_width;
         }
@@ -7408,7 +7432,7 @@ static void ImGui::TabBarScrollToTab(ImGuiTabBar* tab_bar, ImGuiID tab_id, ImGui
     ImGuiTabItem* tab = TabBarFindTabByID(tab_bar, tab_id);
     if (tab == NULL)
         return;
-    if (tab->Flags & (ImGuiTabItemFlags_Leading | ImGuiTabItemFlags_Trailing))
+    if (tab->Flags & ImGuiTabItemFlags_SectionMask_)
         return;
 
     ImGuiContext& g = *GImGui;
@@ -7437,12 +7461,48 @@ static void ImGui::TabBarScrollToTab(ImGuiTabBar* tab_bar, ImGuiID tab_id, ImGui
     }
 }
 
-void ImGui::TabBarQueueReorder(ImGuiTabBar* tab_bar, const ImGuiTabItem* tab, int dir)
+void ImGui::TabBarQueueReorder(ImGuiTabBar* tab_bar, const ImGuiTabItem* tab, int offset)
 {
-    IM_ASSERT(dir == -1 || dir == +1);
+    IM_ASSERT(offset != 0);
     IM_ASSERT(tab_bar->ReorderRequestTabId == 0);
     tab_bar->ReorderRequestTabId = tab->ID;
-    tab_bar->ReorderRequestDir = (ImS8)dir;
+    tab_bar->ReorderRequestOffset = (ImS16)offset;
+}
+
+void ImGui::TabBarQueueReorderFromMousePos(ImGuiTabBar* tab_bar, const ImGuiTabItem* src_tab, ImVec2 mouse_pos)
+{
+    ImGuiContext& g = *GImGui;
+    IM_ASSERT(tab_bar->ReorderRequestTabId == 0);
+    if ((tab_bar->Flags & ImGuiTabBarFlags_Reorderable) == 0)
+        return;
+
+    const bool is_central_section = (src_tab->Flags & ImGuiTabItemFlags_SectionMask_) == 0;
+    const float bar_offset = tab_bar->BarRect.Min.x - (is_central_section ? tab_bar->ScrollingTarget : 0);
+
+    // Count number of contiguous tabs we are crossing over
+    const int dir = (bar_offset + src_tab->Offset) > mouse_pos.x ? -1 : +1;
+    const int src_idx = tab_bar->Tabs.index_from_ptr(src_tab);
+    int dst_idx = src_idx;
+    for (int i = src_idx; i >= 0 && i < tab_bar->Tabs.Size; i += dir)
+    {
+        // Reordered tabs must share the same section
+        const ImGuiTabItem* dst_tab = &tab_bar->Tabs[i];
+        if (dst_tab->Flags & ImGuiTabItemFlags_NoReorder)
+            break;
+        if ((dst_tab->Flags & ImGuiTabItemFlags_SectionMask_) != (src_tab->Flags & ImGuiTabItemFlags_SectionMask_))
+            break;
+        dst_idx = i;
+
+        // Include spacing after tab, so when mouse cursor is between tabs we would not continue checking further tabs that are not hovered.
+        const float x1 = bar_offset + dst_tab->Offset - g.Style.ItemInnerSpacing.x;
+        const float x2 = bar_offset + dst_tab->Offset + dst_tab->Width + g.Style.ItemInnerSpacing.x;
+        //GetForegroundDrawList()->AddRect(ImVec2(x1, tab_bar->BarRect.Min.y), ImVec2(x2, tab_bar->BarRect.Max.y), IM_COL32(255, 0, 0, 255));
+        if ((dir < 0 && mouse_pos.x > x1) || (dir > 0 && mouse_pos.x < x2))
+            break;
+    }
+
+    if (dst_idx != src_idx)
+        TabBarQueueReorder(tab_bar, src_tab, dst_idx - src_idx);
 }
 
 bool ImGui::TabBarProcessReorder(ImGuiTabBar* tab_bar)
@@ -7452,19 +7512,23 @@ bool ImGui::TabBarProcessReorder(ImGuiTabBar* tab_bar)
         return false;
 
     //IM_ASSERT(tab_bar->Flags & ImGuiTabBarFlags_Reorderable); // <- this may happen when using debug tools
-    int tab2_order = tab_bar->GetTabOrder(tab1) + tab_bar->ReorderRequestDir;
+    int tab2_order = tab_bar->GetTabOrder(tab1) + tab_bar->ReorderRequestOffset;
     if (tab2_order < 0 || tab2_order >= tab_bar->Tabs.Size)
         return false;
 
-    // Reordered TabItem must share the same position flags than target
+    // Reordered tabs must share the same section
+    // (Note: TabBarQueueReorderFromMousePos() also has a similar test but since we allow direct calls to TabBarQueueReorder() we do it here too)
     ImGuiTabItem* tab2 = &tab_bar->Tabs[tab2_order];
     if (tab2->Flags & ImGuiTabItemFlags_NoReorder)
         return false;
-    if ((tab1->Flags & (ImGuiTabItemFlags_Leading | ImGuiTabItemFlags_Trailing)) != (tab2->Flags & (ImGuiTabItemFlags_Leading | ImGuiTabItemFlags_Trailing)))
+    if ((tab1->Flags & ImGuiTabItemFlags_SectionMask_) != (tab2->Flags & ImGuiTabItemFlags_SectionMask_))
         return false;
 
     ImGuiTabItem item_tmp = *tab1;
-    *tab1 = *tab2;
+    ImGuiTabItem* src_tab = (tab_bar->ReorderRequestOffset > 0) ? tab1 + 1 : tab2;
+    ImGuiTabItem* dst_tab = (tab_bar->ReorderRequestOffset > 0) ? tab1 : tab2 + 1;
+    const int move_count = (tab_bar->ReorderRequestOffset > 0) ? tab_bar->ReorderRequestOffset : -tab_bar->ReorderRequestOffset;
+    memmove(dst_tab, src_tab, move_count * sizeof(ImGuiTabItem));
     *tab2 = item_tmp;
 
     if (tab_bar->Flags & ImGuiTabBarFlags_SaveSettings)
@@ -7746,7 +7810,7 @@ bool    ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
     const ImVec2 backup_main_cursor_pos = window->DC.CursorPos;
 
     // Layout
-    const bool is_central_section = (tab->Flags & (ImGuiTabItemFlags_Leading | ImGuiTabItemFlags_Trailing)) == 0;
+    const bool is_central_section = (tab->Flags & ImGuiTabItemFlags_SectionMask_) == 0;
     size.x = tab->Width;
     if (is_central_section)
         window->DC.CursorPos = tab_bar->BarRect.Min + ImVec2(IM_FLOOR(tab->Offset - tab_bar->ScrollingAnim), 0.0f);
@@ -7794,13 +7858,11 @@ bool    ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
             // While moving a tab it will jump on the other side of the mouse, so we also test for MouseDelta.x
             if (g.IO.MouseDelta.x < 0.0f && g.IO.MousePos.x < bb.Min.x)
             {
-                if (tab_bar->Flags & ImGuiTabBarFlags_Reorderable)
-                    TabBarQueueReorder(tab_bar, tab, -1);
+                TabBarQueueReorderFromMousePos(tab_bar, tab, g.IO.MousePos);
             }
             else if (g.IO.MouseDelta.x > 0.0f && g.IO.MousePos.x > bb.Max.x)
             {
-                if (tab_bar->Flags & ImGuiTabBarFlags_Reorderable)
-                    TabBarQueueReorder(tab_bar, tab, +1);
+                TabBarQueueReorderFromMousePos(tab_bar, tab, g.IO.MousePos);
             }
         }
     }