Merge branch 'master' into docking

# Conflicts:
#	docs/CHANGELOG.txt
#	imgui.cpp
#	imgui.h
#	imgui_draw.cpp

docs/CHANGELOG.txt

@@ -39,11 +39,37 @@ HOW TO UPDATE?
  VERSION 1.90.9 WIP (In Progress)
 -----------------------------------------------------------------------
 
+Breaking changes:
+
+- Removed old nested structure: renaming ImGuiStorage::ImGuiStoragePair type to
+  ImGuiStoragePair (simpler for many languages). No significant nested type left.
+- Style: renamed tab colors for clarity and consistency with other changes: (#261, #351)
+  - ImGuiCol_TabActive          -> ImGuiCol_TabSelected
+  - ImGuiCol_TabUnfocused       -> ImGuiCol_TabDimmed
+  - ImGuiCol_TabUnfocusedActive -> ImGuiCol_TabDimmedSelected
+  Kept inline redirecting enums (will obsolete).
+
 Other changes:
 
+- IO: do not disable io.ConfigWindowsResizeFromEdges (which allow resizing from borders
+  and lower-left corner) when ImGuiBackendFlags_HasMouseCursors is not set by backend.
+  The initial reasoning is that resizing from borders feels better when correct mouse cursor
+  shape change as honored by backends. Keeping this enabling will hopefully increase pressure
+  on third-party backends to set ImGuiBackendFlags_HasMouseCursors and honor changes of
+  ImGui::GetMouseCursor() value. (#1495)
+- TabBar, Style: added ImGuiTabBarFlags_DrawSelectedOverline option to draw an horizontal
+  line over selected tabs to increase visibility. This is used by docking.
+  Added corresponding ImGuiCol_TabSelectedOverline and ImGuiCol_TabDimmedSelectedOverline colors.
+- Examples: GLFW+Vulkan, SDL+Vulkan: handle swap chain resize even without Vulkan
+  returning VK_SUBOPTIMAL_KHR, which doesn't seem to happen on Wayland. (#7671)
+  [@AndreiNego, @ocornut]
+
+Docking+Viewports Branch:
+
 - Backends: SDL3: Update for introduction of SDL_GLContext from void*. (#7701, #7702)
   [@bcsanches]
 
+
 -----------------------------------------------------------------------
  VERSION 1.90.8 (Released 2024-06-06)
 -----------------------------------------------------------------------
@@ -193,7 +219,6 @@ versions of IsKeyPressed(), IsKeyChordPressed(), IsMouseClicked() prior to this
   those API public. Only past users of imgui_internal.h with the extra parameters will be affected.
   Added asserts for valid flags in various functions to detect _some_ misuses, BUT NOT ALL.
 
-
 Docking+Viewports Branch:
 
 - Docking: *BREAKING* changed signature of DockSpaceOverViewport() to allow passing

examples/example_glfw_vulkan/main.cpp

@@ -497,17 +497,14 @@ int main(int, char**)
         glfwPollEvents();
 
         // Resize swap chain?
-        if (g_SwapChainRebuild)
+        int fb_width, fb_height;
+        glfwGetFramebufferSize(window, &fb_width, &fb_height);
+        if (fb_width > 0 && fb_height > 0 && (g_SwapChainRebuild || g_MainWindowData.Width != fb_width || g_MainWindowData.Height != fb_height))
         {
-            int width, height;
-            glfwGetFramebufferSize(window, &width, &height);
-            if (width > 0 && height > 0)
-            {
-                ImGui_ImplVulkan_SetMinImageCount(g_MinImageCount);
-                ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, &g_MainWindowData, g_QueueFamily, g_Allocator, width, height, g_MinImageCount);
-                g_MainWindowData.FrameIndex = 0;
-                g_SwapChainRebuild = false;
-            }
+            ImGui_ImplVulkan_SetMinImageCount(g_MinImageCount);
+            ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, &g_MainWindowData, g_QueueFamily, g_Allocator, fb_width, fb_height, g_MinImageCount);
+            g_MainWindowData.FrameIndex = 0;
+            g_SwapChainRebuild = false;
         }
 
         // Start the Dear ImGui frame

examples/example_sdl2_vulkan/main.cpp

@@ -506,17 +506,14 @@ int main(int, char**)
         }
 
         // Resize swap chain?
-        if (g_SwapChainRebuild)
+        int fb_width, fb_height;
+        SDL_GetWindowSize(window, &fb_width, &fb_height);
+        if (fb_width > 0 && fb_height > 0 && (g_SwapChainRebuild || g_MainWindowData.Width != fb_width || g_MainWindowData.Height != fb_height))
         {
-            int width, height;
-            SDL_GetWindowSize(window, &width, &height);
-            if (width > 0 && height > 0)
-            {
-                ImGui_ImplVulkan_SetMinImageCount(g_MinImageCount);
-                ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, &g_MainWindowData, g_QueueFamily, g_Allocator, width, height, g_MinImageCount);
-                g_MainWindowData.FrameIndex = 0;
-                g_SwapChainRebuild = false;
-            }
+            ImGui_ImplVulkan_SetMinImageCount(g_MinImageCount);
+            ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, &g_MainWindowData, g_QueueFamily, g_Allocator, fb_width, fb_height, g_MinImageCount);
+            g_MainWindowData.FrameIndex = 0;
+            g_SwapChainRebuild = false;
         }
 
         // Start the Dear ImGui frame

imgui.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.90.8
+// dear imgui, v1.90.9 WIP
 // (main code and documentation)
 
 // Help:
@@ -438,6 +438,8 @@ CODE
                           - likewise io.MousePos and GetMousePos() will use OS coordinates.
                             If you query mouse positions to interact with non-imgui coordinates you will need to offset them, e.g. subtract GetWindowViewport()->Pos.
 
+ - 2024/06/18 (1.90.9) - style: renamed ImGuiCol_TabActive -> ImGuiCol_TabSelected, ImGuiCol_TabUnfocused -> ImGuiCol_TabDimmed, ImGuiCol_TabUnfocusedActive -> ImGuiCol_TabDimmedSelected.
+ - 2024/06/10 (1.90.9) - removed old nested structure: renaming ImGuiStorage::ImGuiStoragePair type to ImGuiStoragePair (simpler for many languages).
  - 2024/06/06 (1.90.8) - reordered ImGuiInputTextFlags values. This should not be breaking unless you are using generated headers that have values not matching the main library.
  - 2024/06/06 (1.90.8) - removed 'ImGuiButtonFlags_MouseButtonDefault_ = ImGuiButtonFlags_MouseButtonLeft', was mostly unused and misleading.
  - 2024/05/27 (1.90.7) - commented out obsolete symbols marked obsolete in 1.88 (May 2022):
@@ -2563,18 +2565,16 @@ void ImGui::ColorConvertHSVtoRGB(float h, float s, float v, float& out_r, float&
 //-----------------------------------------------------------------------------
 
 // std::lower_bound but without the bullshit
-static ImGuiStorage::ImGuiStoragePair* LowerBound(ImVector<ImGuiStorage::ImGuiStoragePair>& data, ImGuiID key)
+ImGuiStoragePair* ImLowerBound(ImGuiStoragePair* in_begin, ImGuiStoragePair* in_end, ImGuiID key)
 {
-    ImGuiStorage::ImGuiStoragePair* first = data.Data;
-    ImGuiStorage::ImGuiStoragePair* last = data.Data + data.Size;
-    size_t count = (size_t)(last - first);
-    while (count > 0)
+    ImGuiStoragePair* in_p = in_begin;
+    for (size_t count = (size_t)(in_end - in_p); count > 0; )
     {
         size_t count2 = count >> 1;
-        ImGuiStorage::ImGuiStoragePair* mid = first + count2;
+        ImGuiStoragePair* mid = in_p + count2;
         if (mid->key < key)
         {
-            first = ++mid;
+            in_p = ++mid;
             count -= count2 + 1;
         }
         else
@@ -2582,7 +2582,7 @@ static ImGuiStorage::ImGuiStoragePair* LowerBound(ImVector<ImGuiStorage::ImGuiSt
             count = count2;
         }
     }
-    return first;
+    return in_p;
 }
 
 // For quicker full rebuild of a storage (instead of an incremental one), you may add all your contents and then sort once.
@@ -2603,7 +2603,7 @@ void ImGuiStorage::BuildSortByKey()
 
 int ImGuiStorage::GetInt(ImGuiID key, int default_val) const
 {
-    ImGuiStoragePair* it = LowerBound(const_cast<ImVector<ImGuiStoragePair>&>(Data), key);
+    ImGuiStoragePair* it = ImLowerBound(const_cast<ImGuiStoragePair*>(Data.Data), const_cast<ImGuiStoragePair*>(Data.Data + Data.Size), key);
     if (it == Data.end() || it->key != key)
         return default_val;
     return it->val_i;
@@ -2616,7 +2616,7 @@ bool ImGuiStorage::GetBool(ImGuiID key, bool default_val) const
 
 float ImGuiStorage::GetFloat(ImGuiID key, float default_val) const
 {
-    ImGuiStoragePair* it = LowerBound(const_cast<ImVector<ImGuiStoragePair>&>(Data), key);
+    ImGuiStoragePair* it = ImLowerBound(const_cast<ImGuiStoragePair*>(Data.Data), const_cast<ImGuiStoragePair*>(Data.Data + Data.Size), key);
     if (it == Data.end() || it->key != key)
         return default_val;
     return it->val_f;
@@ -2624,7 +2624,7 @@ float ImGuiStorage::GetFloat(ImGuiID key, float default_val) const
 
 void* ImGuiStorage::GetVoidPtr(ImGuiID key) const
 {
-    ImGuiStoragePair* it = LowerBound(const_cast<ImVector<ImGuiStoragePair>&>(Data), key);
+    ImGuiStoragePair* it = ImLowerBound(const_cast<ImGuiStoragePair*>(Data.Data), const_cast<ImGuiStoragePair*>(Data.Data + Data.Size), key);
     if (it == Data.end() || it->key != key)
         return NULL;
     return it->val_p;
@@ -2633,7 +2633,7 @@ void* ImGuiStorage::GetVoidPtr(ImGuiID key) const
 // References are only valid until a new value is added to the storage. Calling a Set***() function or a Get***Ref() function invalidates the pointer.
 int* ImGuiStorage::GetIntRef(ImGuiID key, int default_val)
 {
-    ImGuiStoragePair* it = LowerBound(Data, key);
+    ImGuiStoragePair* it = ImLowerBound(Data.Data, Data.Data + Data.Size, key);
     if (it == Data.end() || it->key != key)
         it = Data.insert(it, ImGuiStoragePair(key, default_val));
     return &it->val_i;
@@ -2646,7 +2646,7 @@ bool* ImGuiStorage::GetBoolRef(ImGuiID key, bool default_val)
 
 float* ImGuiStorage::GetFloatRef(ImGuiID key, float default_val)
 {
-    ImGuiStoragePair* it = LowerBound(Data, key);
+    ImGuiStoragePair* it = ImLowerBound(Data.Data, Data.Data + Data.Size, key);
     if (it == Data.end() || it->key != key)
         it = Data.insert(it, ImGuiStoragePair(key, default_val));
     return &it->val_f;
@@ -2654,7 +2654,7 @@ float* ImGuiStorage::GetFloatRef(ImGuiID key, float default_val)
 
 void** ImGuiStorage::GetVoidPtrRef(ImGuiID key, void* default_val)
 {
-    ImGuiStoragePair* it = LowerBound(Data, key);
+    ImGuiStoragePair* it = ImLowerBound(Data.Data, Data.Data + Data.Size, key);
     if (it == Data.end() || it->key != key)
         it = Data.insert(it, ImGuiStoragePair(key, default_val));
     return &it->val_p;
@@ -2663,7 +2663,7 @@ void** ImGuiStorage::GetVoidPtrRef(ImGuiID key, void* default_val)
 // FIXME-OPT: Need a way to reuse the result of lower_bound when doing GetInt()/SetInt() - not too bad because it only happens on explicit interaction (maximum one a frame)
 void ImGuiStorage::SetInt(ImGuiID key, int val)
 {
-    ImGuiStoragePair* it = LowerBound(Data, key);
+    ImGuiStoragePair* it = ImLowerBound(Data.Data, Data.Data + Data.Size, key);
     if (it == Data.end() || it->key != key)
         Data.insert(it, ImGuiStoragePair(key, val));
     else
@@ -2677,7 +2677,7 @@ void ImGuiStorage::SetBool(ImGuiID key, bool val)
 
 void ImGuiStorage::SetFloat(ImGuiID key, float val)
 {
-    ImGuiStoragePair* it = LowerBound(Data, key);
+    ImGuiStoragePair* it = ImLowerBound(Data.Data, Data.Data + Data.Size, key);
     if (it == Data.end() || it->key != key)
         Data.insert(it, ImGuiStoragePair(key, val));
     else
@@ -2686,7 +2686,7 @@ void ImGuiStorage::SetFloat(ImGuiID key, float val)
 
 void ImGuiStorage::SetVoidPtr(ImGuiID key, void* val)
 {
-    ImGuiStoragePair* it = LowerBound(Data, key);
+    ImGuiStoragePair* it = ImLowerBound(Data.Data, Data.Data + Data.Size, key);
     if (it == Data.end() || it->key != key)
         Data.insert(it, ImGuiStoragePair(key, val));
     else
@@ -3386,11 +3386,13 @@ const char* ImGui::GetStyleColorName(ImGuiCol idx)
     case ImGuiCol_ResizeGrip: return "ResizeGrip";
     case ImGuiCol_ResizeGripHovered: return "ResizeGripHovered";
     case ImGuiCol_ResizeGripActive: return "ResizeGripActive";
-    case ImGuiCol_Tab: return "Tab";
     case ImGuiCol_TabHovered: return "TabHovered";
-    case ImGuiCol_TabActive: return "TabActive";
-    case ImGuiCol_TabUnfocused: return "TabUnfocused";
-    case ImGuiCol_TabUnfocusedActive: return "TabUnfocusedActive";
+    case ImGuiCol_Tab: return "Tab";
+    case ImGuiCol_TabSelected: return "TabSelected";
+    case ImGuiCol_TabSelectedOverline: return "TabSelectedOverline";
+    case ImGuiCol_TabDimmed: return "TabDimmed";
+    case ImGuiCol_TabDimmedSelected: return "TabDimmedSelected";
+    case ImGuiCol_TabDimmedSelectedOverline: return "TabDimmedSelectedOverline";
     case ImGuiCol_DockingPreview: return "DockingPreview";
     case ImGuiCol_DockingEmptyBg: return "DockingEmptyBg";
     case ImGuiCol_PlotLines: return "PlotLines";
@@ -4271,7 +4273,7 @@ bool ImGui::ItemHoverable(const ImRect& bb, ImGuiID id, ImGuiItemFlags item_flag
     // Done with rectangle culling so we can perform heavier checks now.
     if (!(item_flags & ImGuiItemFlags_NoWindowHoverableCheck) && !IsWindowContentHoverable(window, ImGuiHoveredFlags_None))
     {
-        g.HoveredIdDisabled = true;
+        g.HoveredIdIsDisabled = true;
         return false;
     }
 
@@ -4306,7 +4308,7 @@ bool ImGui::ItemHoverable(const ImRect& bb, ImGuiID id, ImGuiItemFlags item_flag
         // Release active id if turning disabled
         if (g.ActiveId == id && id != 0)
             ClearActiveID();
-        g.HoveredIdDisabled = true;
+        g.HoveredIdIsDisabled = true;
         return false;
     }
 
@@ -4669,7 +4671,7 @@ void ImGui::UpdateMouseMovingWindowEndFrame()
                         g.MovingWindow = NULL;
 
             // Cancel moving if clicked over an item which was disabled or inhibited by popups (note that we know HoveredId == 0 already)
-            if (g.HoveredIdDisabled)
+            if (g.HoveredIdIsDisabled)
                 g.MovingWindow = NULL;
         }
         else if (root_window == NULL && g.NavWindow != NULL)
@@ -4893,7 +4895,7 @@ void ImGui::NewFrame()
     g.HoveredIdPreviousFrame = g.HoveredId;
     g.HoveredId = 0;
     g.HoveredIdAllowOverlap = false;
-    g.HoveredIdDisabled = false;
+    g.HoveredIdIsDisabled = false;
 
     // Clear ActiveID if the item is not alive anymore.
     // In 1.87, the common most call to KeepAliveID() was moved from GetID() to ItemAdd().
@@ -10558,10 +10560,6 @@ static void ImGui::ErrorCheckNewFrameSanityChecks()
         IM_ASSERT(g.IO.KeyMap[ImGuiKey_Space] != -1 && "ImGuiKey_Space is not mapped, required for keyboard navigation.");
 #endif
 
-    // Check: the io.ConfigWindowsResizeFromEdges option requires backend to honor mouse cursor changes and set the ImGuiBackendFlags_HasMouseCursors flag accordingly.
-    if (g.IO.ConfigWindowsResizeFromEdges && !(g.IO.BackendFlags & ImGuiBackendFlags_HasMouseCursors))
-        g.IO.ConfigWindowsResizeFromEdges = false;
-
     // Perform simple check: error if Docking or Viewport are enabled _exactly_ on frame 1 (instead of frame 0 or later), which is a common error leading to loss of .ini data.
     if (g.FrameCount == 1 && (g.IO.ConfigFlags & ImGuiConfigFlags_DockingEnable) && (g.ConfigFlagsLastFrame & ImGuiConfigFlags_DockingEnable) == 0)
         IM_ASSERT(0 && "Please set DockingEnable before the first call to NewFrame()! Otherwise you will lose your .ini settings!");
@@ -11915,8 +11913,8 @@ void ImGui::CloseCurrentPopup()
         window->DC.NavHideHighlightOneFrame = true;
 }
 
-// Attention! BeginPopup() adds default flags which BeginPopupEx()!
-bool ImGui::BeginPopupEx(ImGuiID id, ImGuiWindowFlags flags)
+// Attention! BeginPopup() adds default flags when calling BeginPopupEx()!
+bool ImGui::BeginPopupEx(ImGuiID id, ImGuiWindowFlags extra_window_flags)
 {
     ImGuiContext& g = *GImGui;
     if (!IsPopupOpen(id, ImGuiPopupFlags_None))
@@ -11926,13 +11924,12 @@ bool ImGui::BeginPopupEx(ImGuiID id, ImGuiWindowFlags flags)
     }
 
     char name[20];
-    if (flags & ImGuiWindowFlags_ChildMenu)
+    if (extra_window_flags & ImGuiWindowFlags_ChildMenu)
         ImFormatString(name, IM_ARRAYSIZE(name), "##Menu_%02d", g.BeginMenuDepth); // Recycle windows based on depth
     else
         ImFormatString(name, IM_ARRAYSIZE(name), "##Popup_%08x", id); // Not recycling, so we can close/open during the same frame
 
-    flags |= ImGuiWindowFlags_Popup | ImGuiWindowFlags_NoDocking;
-    bool is_open = Begin(name, NULL, flags);
+    bool is_open = Begin(name, NULL, extra_window_flags | ImGuiWindowFlags_Popup | ImGuiWindowFlags_NoDocking);
     if (!is_open) // NB: Begin can return false when the popup is completely clipped (e.g. zero size display)
         EndPopup();
 
@@ -21243,7 +21240,7 @@ void ImGui::DebugNodeStorage(ImGuiStorage* storage, const char* label)
 {
     if (!TreeNode(label, "%s: %d entries, %d bytes", label, storage->Data.Size, storage->Data.size_in_bytes()))
         return;
-    for (const ImGuiStorage::ImGuiStoragePair& p : storage->Data)
+    for (const ImGuiStoragePair& p : storage->Data)
         BulletText("Key 0x%08X Value { i: %d }", p.key, p.val_i); // Important: we currently don't store a type, real value may not be integer.
     TreePop();
 }

imgui.h

@@ -1,4 +1,4 @@
-// dear imgui, v1.90.8
+// dear imgui, v1.90.9 WIP
 // (headers)
 
 // Help:
@@ -27,8 +27,8 @@
 
 // Library Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals, e.g. '#if IMGUI_VERSION_NUM >= 12345')
-#define IMGUI_VERSION       "1.90.8"
-#define IMGUI_VERSION_NUM   19080
+#define IMGUI_VERSION       "1.90.9 WIP"
+#define IMGUI_VERSION_NUM   19082
 #define IMGUI_HAS_TABLE
 #define IMGUI_HAS_VIEWPORT          // Viewport WIP branch
 #define IMGUI_HAS_DOCK              // Docking WIP branch
@@ -182,7 +182,8 @@ struct ImGuiPlatformIO;             // Multi-viewport support: interface for Pla
 struct ImGuiPlatformMonitor;        // Multi-viewport support: user-provided bounds for each connected monitor/display. Used when positioning popups and tooltips to avoid them straddling monitors
 struct ImGuiPlatformImeData;        // Platform IME data for io.SetPlatformImeDataFn() function.
 struct ImGuiSizeCallbackData;       // Callback data when using SetNextWindowSizeConstraints() (rare/advanced use)
-struct ImGuiStorage;                // Helper for key->value storage
+struct ImGuiStorage;                // Helper for key->value storage (container sorted by key)
+struct ImGuiStoragePair;            // Helper for key->value storage (pair)
 struct ImGuiStyle;                  // Runtime data for styling/colors
 struct ImGuiTableSortSpecs;         // Sorting specifications for a table (often handling sort specs for a single column, occasionally more)
 struct ImGuiTableColumnSortSpecs;   // Sorting specification for one column of a table
@@ -1254,8 +1255,9 @@ enum ImGuiTabBarFlags_
     ImGuiTabBarFlags_NoCloseWithMiddleMouseButton   = 1 << 3,   // Disable behavior of closing tabs (that are submitted with p_open != NULL) with middle mouse button. You may handle this behavior manually on user's side with if (IsItemHovered() && IsMouseClicked(2)) *p_open = false.
     ImGuiTabBarFlags_NoTabListScrollingButtons      = 1 << 4,   // Disable scrolling buttons (apply when fitting policy is ImGuiTabBarFlags_FittingPolicyScroll)
     ImGuiTabBarFlags_NoTooltip                      = 1 << 5,   // Disable tooltips when hovering a tab
-    ImGuiTabBarFlags_FittingPolicyResizeDown        = 1 << 6,   // Resize tabs when they don't fit
-    ImGuiTabBarFlags_FittingPolicyScroll            = 1 << 7,   // Add scroll buttons when tabs don't fit
+    ImGuiTabBarFlags_DrawSelectedOverline           = 1 << 6,   // Draw selected overline markers over selected tab
+    ImGuiTabBarFlags_FittingPolicyResizeDown        = 1 << 7,   // Resize tabs when they don't fit
+    ImGuiTabBarFlags_FittingPolicyScroll            = 1 << 8,   // Add scroll buttons when tabs don't fit
     ImGuiTabBarFlags_FittingPolicyMask_             = ImGuiTabBarFlags_FittingPolicyResizeDown | ImGuiTabBarFlags_FittingPolicyScroll,
     ImGuiTabBarFlags_FittingPolicyDefault_          = ImGuiTabBarFlags_FittingPolicyResizeDown,
 };
@@ -1659,11 +1661,13 @@ enum ImGuiCol_
     ImGuiCol_ResizeGrip,            // Resize grip in lower-right and lower-left corners of windows.
     ImGuiCol_ResizeGripHovered,
     ImGuiCol_ResizeGripActive,
-    ImGuiCol_Tab,                   // TabItem in a TabBar
-    ImGuiCol_TabHovered,
-    ImGuiCol_TabActive,
-    ImGuiCol_TabUnfocused,
-    ImGuiCol_TabUnfocusedActive,
+    ImGuiCol_TabHovered,            // Tab background, when hovered
+    ImGuiCol_Tab,                   // Tab background, when tab-bar is focused & tab is unselected
+    ImGuiCol_TabSelected,           // Tab background, when tab-bar is focused & tab is selected
+    ImGuiCol_TabSelectedOverline,   // Tab horizontal overline, when tab-bar is focused & tab is selected
+    ImGuiCol_TabDimmed,             // Tab background, when tab-bar is unfocused & tab is unselected
+    ImGuiCol_TabDimmedSelected,     // Tab background, when tab-bar is unfocused & tab is selected
+    ImGuiCol_TabDimmedSelectedOverline,//..horizontal overline, when tab-bar is unfocused & tab is selected
     ImGuiCol_DockingPreview,        // Preview overlay color when about to docking something
     ImGuiCol_DockingEmptyBg,        // Background color for empty node (e.g. CentralNode with no window docked into it)
     ImGuiCol_PlotLines,
@@ -1681,7 +1685,13 @@ enum ImGuiCol_
     ImGuiCol_NavWindowingHighlight, // Highlight window when using CTRL+TAB
     ImGuiCol_NavWindowingDimBg,     // Darken/colorize entire screen behind the CTRL+TAB window list, when active
     ImGuiCol_ModalWindowDimBg,      // Darken/colorize entire screen behind a modal window, when one is active
-    ImGuiCol_COUNT
+    ImGuiCol_COUNT,
+
+#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+    ImGuiCol_TabActive = ImGuiCol_TabSelected,                  // [renamed in 1.90.9]
+    ImGuiCol_TabUnfocused = ImGuiCol_TabDimmed,                 // [renamed in 1.90.9]
+    ImGuiCol_TabUnfocusedActive = ImGuiCol_TabDimmedSelected,   // [renamed in 1.90.9]
+#endif
 };
 
 // Enumeration for PushStyleVar() / PopStyleVar() to temporarily modify the ImGuiStyle structure.
@@ -2579,6 +2589,16 @@ struct ImGuiTextBuffer
     IMGUI_API void      appendfv(const char* fmt, va_list args) IM_FMTLIST(2);
 };
 
+// [Internal] Key+Value for ImGuiStorage
+struct ImGuiStoragePair
+{
+    ImGuiID     key;
+    union       { int val_i; float val_f; void* val_p; };
+    ImGuiStoragePair(ImGuiID _key, int _val)    { key = _key; val_i = _val; }
+    ImGuiStoragePair(ImGuiID _key, float _val)  { key = _key; val_f = _val; }
+    ImGuiStoragePair(ImGuiID _key, void* _val)  { key = _key; val_p = _val; }
+};
+
 // Helper: Key->Value storage
 // Typically you don't have to worry about this since a storage is held within each Window.
 // We use it to e.g. store collapse state for a tree (Int 0/1)
@@ -2590,15 +2610,6 @@ struct ImGuiTextBuffer
 struct ImGuiStorage
 {
     // [Internal]
-    struct ImGuiStoragePair
-    {
-        ImGuiID key;
-        union { int val_i; float val_f; void* val_p; };
-        ImGuiStoragePair(ImGuiID _key, int _val)    { key = _key; val_i = _val; }
-        ImGuiStoragePair(ImGuiID _key, float _val)  { key = _key; val_f = _val; }
-        ImGuiStoragePair(ImGuiID _key, void* _val)  { key = _key; val_p = _val; }
-    };
-
     ImVector<ImGuiStoragePair>      Data;
 
     // - Get***() functions find pair, never add/allocate. Pairs are sorted so a query is O(log N)
@@ -2627,6 +2638,10 @@ struct ImGuiStorage
     IMGUI_API void      BuildSortByKey();
     // Obsolete: use on your own storage if you know only integer are being stored (open/close all tree nodes)
     IMGUI_API void      SetAllInt(int val);
+
+#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+    //typedef ::ImGuiStoragePair ImGuiStoragePair;  // 1.90.8: moved type outside struct
+#endif
 };
 
 // Helper: Manually clip large list of items.

imgui_demo.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.90.8
+// dear imgui, v1.90.9 WIP
 // (demo code)
 
 // Help:
@@ -1791,6 +1791,7 @@ static void ShowDemoWindowWidgets()
             ImGui::CheckboxFlags("ImGuiTabBarFlags_AutoSelectNewTabs", &tab_bar_flags, ImGuiTabBarFlags_AutoSelectNewTabs);
             ImGui::CheckboxFlags("ImGuiTabBarFlags_TabListPopupButton", &tab_bar_flags, ImGuiTabBarFlags_TabListPopupButton);
             ImGui::CheckboxFlags("ImGuiTabBarFlags_NoCloseWithMiddleMouseButton", &tab_bar_flags, ImGuiTabBarFlags_NoCloseWithMiddleMouseButton);
+            ImGui::CheckboxFlags("ImGuiTabBarFlags_DrawSelectedOverline", &tab_bar_flags, ImGuiTabBarFlags_DrawSelectedOverline);
             if ((tab_bar_flags & ImGuiTabBarFlags_FittingPolicyMask_) == 0)
                 tab_bar_flags |= ImGuiTabBarFlags_FittingPolicyDefault_;
             if (ImGui::CheckboxFlags("ImGuiTabBarFlags_FittingPolicyResizeDown", &tab_bar_flags, ImGuiTabBarFlags_FittingPolicyResizeDown))
@@ -1799,11 +1800,13 @@ static void ShowDemoWindowWidgets()
                 tab_bar_flags &= ~(ImGuiTabBarFlags_FittingPolicyMask_ ^ ImGuiTabBarFlags_FittingPolicyScroll);
 
             // Tab Bar
+            ImGui::AlignTextToFramePadding();
+            ImGui::Text("Opened:");
             const char* names[4] = { "Artichoke", "Beetroot", "Celery", "Daikon" };
             static bool opened[4] = { true, true, true, true }; // Persistent user state
             for (int n = 0; n < IM_ARRAYSIZE(opened); n++)
             {
-                if (n > 0) { ImGui::SameLine(); }
+                ImGui::SameLine();
                 ImGui::Checkbox(names[n], &opened[n]);
             }
 
@@ -8869,6 +8872,7 @@ void ShowExampleAppDocuments(bool* p_open)
     if (opt_target == Target_Tab)
     {
         ImGuiTabBarFlags tab_bar_flags = (opt_fitting_flags) | (opt_reorderable ? ImGuiTabBarFlags_Reorderable : 0);
+        tab_bar_flags |= ImGuiTabBarFlags_DrawSelectedOverline;
         if (ImGui::BeginTabBar("##tabs", tab_bar_flags))
         {
             if (opt_reorderable)

imgui_draw.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.90.8
+// dear imgui, v1.90.9 WIP
 // (drawing and font code)
 
 /*
@@ -211,11 +211,13 @@ void ImGui::StyleColorsDark(ImGuiStyle* dst)
     colors[ImGuiCol_ResizeGrip]             = ImVec4(0.26f, 0.59f, 0.98f, 0.20f);
     colors[ImGuiCol_ResizeGripHovered]      = ImVec4(0.26f, 0.59f, 0.98f, 0.67f);
     colors[ImGuiCol_ResizeGripActive]       = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
-    colors[ImGuiCol_Tab]                    = ImLerp(colors[ImGuiCol_Header],       colors[ImGuiCol_TitleBgActive], 0.80f);
     colors[ImGuiCol_TabHovered]             = colors[ImGuiCol_HeaderHovered];
-    colors[ImGuiCol_TabActive]              = ImLerp(colors[ImGuiCol_HeaderActive], colors[ImGuiCol_TitleBgActive], 0.60f);
-    colors[ImGuiCol_TabUnfocused]           = ImLerp(colors[ImGuiCol_Tab],          colors[ImGuiCol_TitleBg], 0.80f);
-    colors[ImGuiCol_TabUnfocusedActive]     = ImLerp(colors[ImGuiCol_TabActive],    colors[ImGuiCol_TitleBg], 0.40f);
+    colors[ImGuiCol_Tab]                    = ImLerp(colors[ImGuiCol_Header],       colors[ImGuiCol_TitleBgActive], 0.80f);
+    colors[ImGuiCol_TabSelected]            = ImLerp(colors[ImGuiCol_HeaderActive], colors[ImGuiCol_TitleBgActive], 0.60f);
+    colors[ImGuiCol_TabSelectedOverline]    = colors[ImGuiCol_HeaderActive];
+    colors[ImGuiCol_TabDimmed]              = ImLerp(colors[ImGuiCol_Tab],          colors[ImGuiCol_TitleBg], 0.80f);
+    colors[ImGuiCol_TabDimmedSelected]      = ImLerp(colors[ImGuiCol_TabSelected],  colors[ImGuiCol_TitleBg], 0.40f);
+    colors[ImGuiCol_TabDimmedSelectedOverline] = ImVec4(0.50f, 0.50f, 0.50f, 1.00f);
     colors[ImGuiCol_DockingPreview]         = colors[ImGuiCol_HeaderActive] * ImVec4(1.0f, 1.0f, 1.0f, 0.7f);
     colors[ImGuiCol_DockingEmptyBg]         = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);
     colors[ImGuiCol_PlotLines]              = ImVec4(0.61f, 0.61f, 0.61f, 1.00f);
@@ -273,11 +275,13 @@ void ImGui::StyleColorsClassic(ImGuiStyle* dst)
     colors[ImGuiCol_ResizeGrip]             = ImVec4(1.00f, 1.00f, 1.00f, 0.10f);
     colors[ImGuiCol_ResizeGripHovered]      = ImVec4(0.78f, 0.82f, 1.00f, 0.60f);
     colors[ImGuiCol_ResizeGripActive]       = ImVec4(0.78f, 0.82f, 1.00f, 0.90f);
-    colors[ImGuiCol_Tab]                    = ImLerp(colors[ImGuiCol_Header],       colors[ImGuiCol_TitleBgActive], 0.80f);
     colors[ImGuiCol_TabHovered]             = colors[ImGuiCol_HeaderHovered];
-    colors[ImGuiCol_TabActive]              = ImLerp(colors[ImGuiCol_HeaderActive], colors[ImGuiCol_TitleBgActive], 0.60f);
-    colors[ImGuiCol_TabUnfocused]           = ImLerp(colors[ImGuiCol_Tab],          colors[ImGuiCol_TitleBg], 0.80f);
-    colors[ImGuiCol_TabUnfocusedActive]     = ImLerp(colors[ImGuiCol_TabActive],    colors[ImGuiCol_TitleBg], 0.40f);
+    colors[ImGuiCol_Tab]                    = ImLerp(colors[ImGuiCol_Header],       colors[ImGuiCol_TitleBgActive], 0.80f);
+    colors[ImGuiCol_TabSelected]            = ImLerp(colors[ImGuiCol_HeaderActive], colors[ImGuiCol_TitleBgActive], 0.60f);
+    colors[ImGuiCol_TabSelectedOverline]    = colors[ImGuiCol_HeaderActive];
+    colors[ImGuiCol_TabDimmed]              = ImLerp(colors[ImGuiCol_Tab],          colors[ImGuiCol_TitleBg], 0.80f);
+    colors[ImGuiCol_TabDimmedSelected]      = ImLerp(colors[ImGuiCol_TabSelected],  colors[ImGuiCol_TitleBg], 0.40f);
+    colors[ImGuiCol_TabDimmedSelectedOverline] = colors[ImGuiCol_HeaderActive];
     colors[ImGuiCol_DockingPreview]         = colors[ImGuiCol_Header] * ImVec4(1.0f, 1.0f, 1.0f, 0.7f);
     colors[ImGuiCol_DockingEmptyBg]         = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);
     colors[ImGuiCol_PlotLines]              = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
@@ -336,11 +340,13 @@ void ImGui::StyleColorsLight(ImGuiStyle* dst)
     colors[ImGuiCol_ResizeGrip]             = ImVec4(0.35f, 0.35f, 0.35f, 0.17f);
     colors[ImGuiCol_ResizeGripHovered]      = ImVec4(0.26f, 0.59f, 0.98f, 0.67f);
     colors[ImGuiCol_ResizeGripActive]       = ImVec4(0.26f, 0.59f, 0.98f, 0.95f);
-    colors[ImGuiCol_Tab]                    = ImLerp(colors[ImGuiCol_Header],       colors[ImGuiCol_TitleBgActive], 0.90f);
     colors[ImGuiCol_TabHovered]             = colors[ImGuiCol_HeaderHovered];
-    colors[ImGuiCol_TabActive]              = ImLerp(colors[ImGuiCol_HeaderActive], colors[ImGuiCol_TitleBgActive], 0.60f);
-    colors[ImGuiCol_TabUnfocused]           = ImLerp(colors[ImGuiCol_Tab],          colors[ImGuiCol_TitleBg], 0.80f);
-    colors[ImGuiCol_TabUnfocusedActive]     = ImLerp(colors[ImGuiCol_TabActive],    colors[ImGuiCol_TitleBg], 0.40f);
+    colors[ImGuiCol_Tab]                    = ImLerp(colors[ImGuiCol_Header],       colors[ImGuiCol_TitleBgActive], 0.90f);
+    colors[ImGuiCol_TabSelected]            = ImLerp(colors[ImGuiCol_HeaderActive], colors[ImGuiCol_TitleBgActive], 0.60f);
+    colors[ImGuiCol_TabSelectedOverline]    = colors[ImGuiCol_HeaderActive];
+    colors[ImGuiCol_TabDimmed]              = ImLerp(colors[ImGuiCol_Tab],          colors[ImGuiCol_TitleBg], 0.80f);
+    colors[ImGuiCol_TabDimmedSelected]      = ImLerp(colors[ImGuiCol_TabSelected],  colors[ImGuiCol_TitleBg], 0.40f);
+    colors[ImGuiCol_TabDimmedSelectedOverline] = ImVec4(0.26f, 0.59f, 1.00f, 1.00f);
     colors[ImGuiCol_DockingPreview]         = colors[ImGuiCol_Header] * ImVec4(1.0f, 1.0f, 1.0f, 0.7f);
     colors[ImGuiCol_DockingEmptyBg]         = ImVec4(0.20f, 0.20f, 0.20f, 1.00f);
     colors[ImGuiCol_PlotLines]              = ImVec4(0.39f, 0.39f, 0.39f, 1.00f);

imgui_internal.h

@@ -1,4 +1,4 @@
-// dear imgui, v1.90.8
+// dear imgui, v1.90.9 WIP
 // (internal structures/api)
 
 // You may use this file to debug, understand or extend Dear ImGui features but we don't provide any guarantee of forward compatibility.
@@ -360,6 +360,7 @@ namespace ImStb
 // - Helper: ImPool<>
 // - Helper: ImChunkStream<>
 // - Helper: ImGuiTextIndex
+// - Helper: ImGuiStorage
 //-----------------------------------------------------------------------------
 
 // Helpers: Hashing
@@ -734,7 +735,7 @@ struct ImChunkStream
     void    swap(ImChunkStream<T>& rhs) { rhs.Buf.swap(Buf); }
 };
 
-// Helper: ImGuiTextIndex<>
+// Helper: ImGuiTextIndex
 // Maintain a line index for a text buffer. This is a strong candidate to be moved into the public API.
 struct ImGuiTextIndex
 {
@@ -748,6 +749,8 @@ struct ImGuiTextIndex
     void            append(const char* base, int old_size, int new_size);
 };
 
+// Helper: ImGuiStorage
+IMGUI_API ImGuiStoragePair* ImLowerBound(ImGuiStoragePair* in_begin, ImGuiStoragePair* in_end, ImGuiID key);
 //-----------------------------------------------------------------------------
 // [SECTION] ImDrawList support
 //-----------------------------------------------------------------------------
@@ -2165,7 +2168,7 @@ struct ImGuiContext
     float                   HoveredIdTimer;                     // Measure contiguous hovering time
     float                   HoveredIdNotActiveTimer;            // Measure contiguous hovering time where the item has not been active
     bool                    HoveredIdAllowOverlap;
-    bool                    HoveredIdDisabled;                  // At least one widget passed the rect test, but has been discarded by disabled flag or popup inhibit. May be true even if HoveredId == 0.
+    bool                    HoveredIdIsDisabled;                // At least one widget passed the rect test, but has been discarded by disabled flag or popup inhibit. May be true even if HoveredId == 0.
     bool                    ItemUnclipByLog;                    // Disable ItemAdd() clipping, essentially a memory-locality friendly copy of LogEnabled
     ImGuiID                 ActiveId;                           // Active widget
     ImGuiID                 ActiveIdIsAlive;                    // Active widget has been seen this frame (we can't use a bool as the ActiveId may change within the frame)
@@ -2490,7 +2493,7 @@ struct ImGuiContext
         DebugHookIdInfo = 0;
         HoveredId = HoveredIdPreviousFrame = 0;
         HoveredIdAllowOverlap = false;
-        HoveredIdDisabled = false;
+        HoveredIdIsDisabled = false;
         HoveredIdTimer = HoveredIdNotActiveTimer = 0.0f;
         ItemUnclipByLog = false;
         ActiveId = 0;
@@ -3394,16 +3397,16 @@ namespace ImGui
     IMGUI_API void          LogRenderedText(const ImVec2* ref_pos, const char* text, const char* text_end = NULL);
     IMGUI_API void          LogSetNextTextDecoration(const char* prefix, const char* suffix);
 
-    // Popups, Modals, Tooltips
+    // Childs
     IMGUI_API bool          BeginChildEx(const char* name, ImGuiID id, const ImVec2& size_arg, ImGuiChildFlags child_flags, ImGuiWindowFlags window_flags);
+
+    // Popups, Modals
+    IMGUI_API bool          BeginPopupEx(ImGuiID id, ImGuiWindowFlags extra_window_flags);
     IMGUI_API void          OpenPopupEx(ImGuiID id, ImGuiPopupFlags popup_flags = ImGuiPopupFlags_None);
     IMGUI_API void          ClosePopupToLevel(int remaining, bool restore_focus_to_window_under_popup);
     IMGUI_API void          ClosePopupsOverWindow(ImGuiWindow* ref_window, bool restore_focus_to_window_under_popup);
     IMGUI_API void          ClosePopupsExceptModals();
     IMGUI_API bool          IsPopupOpen(ImGuiID id, ImGuiPopupFlags popup_flags);
-    IMGUI_API bool          BeginPopupEx(ImGuiID id, ImGuiWindowFlags extra_flags);
-    IMGUI_API bool          BeginTooltipEx(ImGuiTooltipFlags tooltip_flags, ImGuiWindowFlags extra_window_flags);
-    IMGUI_API bool          BeginTooltipHidden();
     IMGUI_API ImRect        GetPopupAllowedExtentRect(ImGuiWindow* window);
     IMGUI_API ImGuiWindow*  GetTopMostPopupModal();
     IMGUI_API ImGuiWindow*  GetTopMostAndVisiblePopupModal();
@@ -3411,6 +3414,10 @@ namespace ImGui
     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);
 
+    // Tooltips
+    IMGUI_API bool          BeginTooltipEx(ImGuiTooltipFlags tooltip_flags, ImGuiWindowFlags extra_window_flags);
+    IMGUI_API bool          BeginTooltipHidden();
+
     // Menus
     IMGUI_API bool          BeginViewportSideBar(const char* name, ImGuiViewport* viewport, ImGuiDir dir, float size, ImGuiWindowFlags window_flags);
     IMGUI_API bool          BeginMenuEx(const char* label, const char* icon, bool enabled = true);

imgui_tables.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.90.8
+// dear imgui, v1.90.9 WIP
 // (tables and columns code)
 
 /*

imgui_widgets.cpp

@@ -1,4 +1,4 @@
-// dear imgui, v1.90.8
+// dear imgui, v1.90.9 WIP
 // (widgets code)
 
 /*
@@ -7934,7 +7934,9 @@ bool    ImGui::BeginTabBar(const char* str_id, ImGuiTabBarFlags flags)
     tab_bar->ID = id;
     tab_bar->SeparatorMinX = tab_bar->BarRect.Min.x - IM_TRUNC(window->WindowPadding.x * 0.5f);
     tab_bar->SeparatorMaxX = tab_bar->BarRect.Max.x + IM_TRUNC(window->WindowPadding.x * 0.5f);
-    return BeginTabBarEx(tab_bar, tab_bar_bb, flags | ImGuiTabBarFlags_IsFocused);
+    //if (g.NavWindow && IsWindowChildOf(g.NavWindow, window, false, false))
+    flags |= ImGuiTabBarFlags_IsFocused;
+    return BeginTabBarEx(tab_bar, tab_bar_bb, flags);
 }
 
 bool    ImGui::BeginTabBarEx(ImGuiTabBar* tab_bar, const ImRect& tab_bar_bb, ImGuiTabBarFlags flags)
@@ -7989,7 +7991,7 @@ bool    ImGui::BeginTabBarEx(ImGuiTabBar* tab_bar, const ImRect& tab_bar_bb, ImG
 
     // Draw separator
     // (it would be misleading to draw this in EndTabBar() suggesting that it may be drawn over tabs, as tab bar are appendable)
-    const ImU32 col = GetColorU32((flags & ImGuiTabBarFlags_IsFocused) ? ImGuiCol_TabActive : ImGuiCol_TabUnfocusedActive);
+    const ImU32 col = GetColorU32((flags & ImGuiTabBarFlags_IsFocused) ? ImGuiCol_TabSelected : ImGuiCol_TabDimmedSelected);
     if (g.Style.TabBarBorderSize > 0.0f)
     {
         const float y = tab_bar->BarRect.Max.y;
@@ -8945,8 +8947,16 @@ bool    ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
 
     // Render tab shape
     ImDrawList* display_draw_list = window->DrawList;
-    const ImU32 tab_col = GetColorU32((held || hovered) ? ImGuiCol_TabHovered : tab_contents_visible ? (tab_bar_focused ? ImGuiCol_TabActive : ImGuiCol_TabUnfocusedActive) : (tab_bar_focused ? ImGuiCol_Tab : ImGuiCol_TabUnfocused));
+    const ImU32 tab_col = GetColorU32((held || hovered) ? ImGuiCol_TabHovered : tab_contents_visible ? (tab_bar_focused ? ImGuiCol_TabSelected : ImGuiCol_TabDimmedSelected) : (tab_bar_focused ? ImGuiCol_Tab : ImGuiCol_TabDimmed));
     TabItemBackground(display_draw_list, bb, flags, tab_col);
+    if (tab_contents_visible && (tab_bar->Flags & ImGuiTabBarFlags_DrawSelectedOverline))
+    {
+        float x_offset = IM_TRUNC(0.4f * style.TabRounding);
+        if (x_offset < 2.0f * g.CurrentDpiScale)
+            x_offset = 0.0f;
+        float y_offset = 1.0f * g.CurrentDpiScale;
+        display_draw_list->AddLine(bb.GetTL() + ImVec2(x_offset, y_offset), bb.GetTR() + ImVec2(-x_offset, y_offset), GetColorU32(tab_bar_focused ? ImGuiCol_TabSelectedOverline : ImGuiCol_TabDimmedSelectedOverline), 2.0f * g.CurrentDpiScale);
+    }
     RenderNavHighlight(bb, id);
 
     // Select with right mouse button. This is so the common idiom for context menu automatically highlight the current widget.