Merge branch 'ocornut:master' into master

2024-11-23 23:31:08 +01:00 · 2024-09-27 21:46:32 -04:00 · 2024-09-27 21:46:32 -04:00 · 888e0ff297
commit 888e0ff297
parent a6c1620a17 ba14c70b02
18 changed files with 736 additions and 443 deletions
--- a/backends/imgui_impl_allegro5.cpp
+++ b/backends/imgui_impl_allegro5.cpp
@ -310,7 +310,8 @@ static void ImGui_ImplAllegro5_SetClipboardText(ImGuiContext*, const char* text)
 }
 #endif

-static ImGuiKey ImGui_ImplAllegro5_KeyCodeToImGuiKey(int key_code)
+// Not static to allow third-party code to use that if they want to (but undocumented)
+ImGuiKey ImGui_ImplAllegro5_KeyCodeToImGuiKey(int key_code)
 {
    switch (key_code)
    {
--- a/backends/imgui_impl_glfw.cpp
+++ b/backends/imgui_impl_glfw.cpp
@ -185,9 +185,12 @@ static ImGui_ImplGlfw_Data* ImGui_ImplGlfw_GetBackendData()
 }

 // Functions
-static ImGuiKey ImGui_ImplGlfw_KeyToImGuiKey(int key)
+
+// Not static to allow third-party code to use that if they want to (but undocumented)
+ImGuiKey ImGui_ImplGlfw_KeyToImGuiKey(int keycode, int scancode)
 {
-    switch (key)
+    IM_UNUSED(scancode);
+    switch (keycode)
    {
        case GLFW_KEY_TAB: return ImGuiKey_Tab;
        case GLFW_KEY_LEFT: return ImGuiKey_LeftArrow;
@ -355,6 +358,7 @@ void ImGui_ImplGlfw_ScrollCallback(GLFWwindow* window, double xoffset, double yo
    io.AddMouseWheelEvent((float)xoffset, (float)yoffset);
 }

+// FIXME: should this be baked into ImGui_ImplGlfw_KeyToImGuiKey()? then what about the values passed to io.SetKeyEventNativeData()?
 static int ImGui_ImplGlfw_TranslateUntranslatedKey(int key, int scancode)
 {
 #if GLFW_HAS_GETKEYNAME && !defined(EMSCRIPTEN_USE_EMBEDDED_GLFW3)
@ -402,7 +406,7 @@ void ImGui_ImplGlfw_KeyCallback(GLFWwindow* window, int keycode, int scancode, i
    keycode = ImGui_ImplGlfw_TranslateUntranslatedKey(keycode, scancode);

    ImGuiIO& io = ImGui::GetIO();
-    ImGuiKey imgui_key = ImGui_ImplGlfw_KeyToImGuiKey(keycode);
+    ImGuiKey imgui_key = ImGui_ImplGlfw_KeyToImGuiKey(keycode, scancode);
    io.AddKeyEvent(imgui_key, (action == GLFW_PRESS));
    io.SetKeyEventNativeData(imgui_key, keycode, scancode); // To support legacy indexing (<1.87 user code)
 }
--- a/backends/imgui_impl_osx.mm
+++ b/backends/imgui_impl_osx.mm
@ -259,7 +259,9 @@ static bool ImGui_ImplOSX_HandleEvent(NSEvent* event, NSView* view);
@end

 // Functions
-static ImGuiKey ImGui_ImplOSX_KeyCodeToImGuiKey(int key_code)
+
+// Not static to allow third-party code to use that if they want to (but undocumented)
+ImGuiKey ImGui_ImplOSX_KeyCodeToImGuiKey(int key_code)
 {
    switch (key_code)
    {
--- a/backends/imgui_impl_sdl2.cpp
+++ b/backends/imgui_impl_sdl2.cpp
@ -180,7 +180,8 @@ static void ImGui_ImplSDL2_PlatformSetImeData(ImGuiContext*, ImGuiViewport*, ImG
    }
 }

-static ImGuiKey ImGui_ImplSDL2_KeyEventToImGuiKey(SDL_Keycode keycode, SDL_Scancode scancode)
+// Not static to allow third-party code to use that if they want to (but undocumented)
+ImGuiKey ImGui_ImplSDL2_KeyEventToImGuiKey(SDL_Keycode keycode, SDL_Scancode scancode)
 {
    IM_UNUSED(scancode);
    switch (keycode)
--- a/backends/imgui_impl_sdl3.cpp
+++ b/backends/imgui_impl_sdl3.cpp
@ -159,7 +159,8 @@ static void ImGui_ImplSDL3_PlatformSetImeData(ImGuiContext*, ImGuiViewport* view
    }
 }

-static ImGuiKey ImGui_ImplSDL3_KeyEventToImGuiKey(SDL_Keycode keycode, SDL_Scancode scancode)
+// Not static to allow third-party code to use that if they want to (but undocumented)
+ImGuiKey ImGui_ImplSDL3_KeyEventToImGuiKey(SDL_Keycode keycode, SDL_Scancode scancode)
 {
    // Keypad doesn't have individual key values in SDL3
    switch (scancode)
@ -563,7 +564,7 @@ static void ImGui_ImplSDL3_UpdateMouseData()
    // We forward mouse input when hovered or captured (via SDL_EVENT_MOUSE_MOTION) or when focused (below)
 #if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
    // SDL_CaptureMouse() let the OS know e.g. that our imgui drag outside the SDL window boundaries shouldn't e.g. trigger other operations outside
-    SDL_CaptureMouse((bd->MouseButtonsDown != 0) ? SDL_TRUE : SDL_FALSE);
+    SDL_CaptureMouse(bd->MouseButtonsDown != 0);
    SDL_Window* focused_window = SDL_GetKeyboardFocus();
    const bool is_app_focused = (bd->Window == focused_window);
 #else
--- a/backends/imgui_impl_sdlrenderer3.cpp
+++ b/backends/imgui_impl_sdlrenderer3.cpp
@ -158,8 +158,8 @@ void ImGui_ImplSDLRenderer3_RenderDrawData(ImDrawData* draw_data, SDL_Renderer*
        SDL_Rect    ClipRect;
    };
    BackupSDLRendererState old = {};
-    old.ViewportEnabled = SDL_RenderViewportSet(renderer) == SDL_TRUE;
-    old.ClipEnabled = SDL_RenderClipEnabled(renderer) == SDL_TRUE;
+    old.ViewportEnabled = SDL_RenderViewportSet(renderer);
+    old.ClipEnabled = SDL_RenderClipEnabled(renderer);
    SDL_GetRenderViewport(renderer, &old.Viewport);
    SDL_GetRenderClipRect(renderer, &old.ClipRect);

--- a/backends/imgui_impl_wgpu.cpp
+++ b/backends/imgui_impl_wgpu.cpp
@ -257,13 +257,15 @@ static WGPUProgrammableStageDescriptor ImGui_ImplWGPU_CreateShaderModule(const c
 {
    ImGui_ImplWGPU_Data* bd = ImGui_ImplWGPU_GetBackendData();

-    WGPUShaderModuleWGSLDescriptor wgsl_desc = {};
 #ifdef IMGUI_IMPL_WEBGPU_BACKEND_DAWN
+	WGPUShaderSourceWGSL wgsl_desc = {};
    wgsl_desc.chain.sType = WGPUSType_ShaderSourceWGSL;
+	wgsl_desc.code = { wgsl_source, WGPU_STRLEN };
 #else
+	WGPUShaderModuleWGSLDescriptor wgsl_desc = {};
    wgsl_desc.chain.sType = WGPUSType_ShaderModuleWGSLDescriptor;
-#endif
 	wgsl_desc.code = wgsl_source;
+#endif

    WGPUShaderModuleDescriptor desc = {};
    desc.nextInChain = reinterpret_cast<WGPUChainedStruct*>(&wgsl_desc);
--- a/backends/imgui_impl_win32.cpp
+++ b/backends/imgui_impl_win32.cpp
@ -419,12 +419,14 @@ void    ImGui_ImplWin32_NewFrame()
    ImGui_ImplWin32_UpdateGamepads();
 }

-// There is no distinct VK_xxx for keypad enter, instead it is VK_RETURN + KF_EXTENDED, we assign it an arbitrary value to make code more readable (VK_ codes go up to 255)
-#define IM_VK_KEYPAD_ENTER      (VK_RETURN + 256)
-
 // Map VK_xxx to ImGuiKey_xxx.
-static ImGuiKey ImGui_ImplWin32_VirtualKeyToImGuiKey(WPARAM wParam)
+// Not static to allow third-party code to use that if they want to (but undocumented)
+ImGuiKey ImGui_ImplWin32_KeyEventToImGuiKey(WPARAM wParam, LPARAM lParam)
 {
+    // There is no distinct VK_xxx for keypad enter, instead it is VK_RETURN + KF_EXTENDED.
+    if ((wParam == VK_RETURN) && (HIWORD(lParam) & KF_EXTENDED))
+        return ImGuiKey_KeypadEnter;
+
    switch (wParam)
    {
        case VK_TAB: return ImGuiKey_Tab;
@ -473,7 +475,6 @@ static ImGuiKey ImGui_ImplWin32_VirtualKeyToImGuiKey(WPARAM wParam)
        case VK_MULTIPLY: return ImGuiKey_KeypadMultiply;
        case VK_SUBTRACT: return ImGuiKey_KeypadSubtract;
        case VK_ADD: return ImGuiKey_KeypadAdd;
-        case IM_VK_KEYPAD_ENTER: return ImGuiKey_KeypadEnter;
        case VK_LSHIFT: return ImGuiKey_LeftShift;
        case VK_LCONTROL: return ImGuiKey_LeftCtrl;
        case VK_LMENU: return ImGuiKey_LeftAlt;
@ -692,12 +693,9 @@ IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARA
            // Submit modifiers
            ImGui_ImplWin32_UpdateKeyModifiers();

-            // Obtain virtual key code
-            // (keypad enter doesn't have its own... VK_RETURN with KF_EXTENDED flag means keypad enter, see IM_VK_KEYPAD_ENTER definition for details, it is mapped to ImGuiKey_KeyPadEnter.)
-            int vk = (int)wParam;
-            if ((wParam == VK_RETURN) && (HIWORD(lParam) & KF_EXTENDED))
-                vk = IM_VK_KEYPAD_ENTER;
-            const ImGuiKey key = ImGui_ImplWin32_VirtualKeyToImGuiKey(vk);
+            // Obtain virtual key code and convert to ImGuiKey
+            const ImGuiKey key = ImGui_ImplWin32_KeyEventToImGuiKey(wParam, lParam);
+            const int vk = (int)wParam;
            const int scancode = (int)LOBYTE(HIWORD(lParam));

            // Special behavior for VK_SNAPSHOT / ImGuiKey_PrintScreen as Windows doesn't emit the key down event.
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@ -36,13 +36,47 @@ HOW TO UPDATE?
 - Please report any issue!

 -----------------------------------------------------------------------
- VERSION 1.91.2 WIP (In Progress)
+ VERSION 1.91.3 WIP (In Progress)
 -----------------------------------------------------------------------

 Breaking changes:

 Other changes:

+- Error Handling: Enabled/improved error recovery systems. (#1651, #5654)
+  - Error recovery is not perfect nor guaranteed! It is a feature to ease development.
+  - Functions that support error recovery are using IM_ASSERT_USER_ERROR() instead of IM_ASSERT().
+  - You not are not supposed to rely on it in the course of a normal application run.
+  - Possible usage: facilitate recovery from errors triggered from a scripting language or
+    after specific exceptions handlers. Surface errors to programmers in less agressive ways.
+  - Always ensure that on programmers seats you have at minimum Asserts or Tooltips enabled
+    when making direct imgui API calls! Otherwise it would severely hinder your ability to
+    catch and correct mistakes!
+  - Added io.ConfigErrorRecovery to enable error recovery support.
+  - Added io.ConfigErrorRecoveryEnableAssert to assert on recoverable errors.
+  - Added io.ConfigErrorRecoveryEnableDebugLog to output to debug log on recoverable errors.
+  - Added io.ConfigErrorRecoveryEnableTooltip to enable displaying an error tooltip on recoverable errors.
+    The tooltip include a way to enable asserts if they were disabled.
+  - All options are enabled by default.
+  - Read https://github.com/ocornut/imgui/wiki/Error-Handling for a bit more details.
+- Windows: BeginChild(): made it possible to call SetNextWindowSize() on a child window
+  using ImGuiChildFlags_ResizeX,ImGuiChildFlags_ResizeY in order to override its current
+  size. (#1710, #8020)
+- Scrollbar: Shift+Click scroll to clicked location (pre-1.90.8 default). (#8002, #7328)
+- Scrollbar: added io.ConfigScrollbarScrollByPage setting (default to true). (#8002, #7328)
+  Set io.ConfigScrollbarScrollByPage=false to enforce always scrolling to clicked location.
+- Backends: SDL3: Update for API changes: SDL_bool removal. SDL_INIT_TIMER removal.
+- Backends: WebGPU: Fixed DAWN api change using WGPUStringView in WGPUShaderSourceWGSL.
+  (#8009, #8010) [@blitz-research]
+
+-----------------------------------------------------------------------
+ VERSION 1.91.2 (Released 2024-09-19)
+-----------------------------------------------------------------------
+
+Decorated log and release notes: https://github.com/ocornut/imgui/releases/tag/v1.91.2
+
+Other changes:
+
 - Added io.ConfigDebugHighlightIdConflicts debug feature! (#7961, #7669)
  THIS DETECTS THE MOST COMMON USER ERROR BY FIRST-TIME DEAR IMGUI PROGRAMMERS!
  - The tool detects when multiple items are sharing the same identifier, due to not
@ -54,7 +88,7 @@ Other changes:
  - I've been wanting to add this tool for a long time, but was stalled by finding a way to
    not make it spammy + make it practically zero cost. After @pthom made various proposals to
    solve the same problem (thanks for pushing me!), I decided it was time to finish it.
-  - Added ImGuiItemFlags_AllowDuplicateId to use with PushItemFlag/PopItemFlag() if for some
+  - Added ImGuiItemFlags_AllowDuplicateId to use with PushItemFlag()/PopItemFlag() if for some
    reason you intend to have duplicate identifiers.
  - (#74, #96, #480, #501, #647, #654, #719, #843, #894, #1057, #1173, #1390, #1414, #1556, #1768,
     #2041, #2116, #2330, #2475, #2562, #2667, #2807, #2885, #3102, #3375, #3526, #3964, #4008,
--- a/examples/example_sdl3_opengl3/main.cpp
+++ b/examples/example_sdl3_opengl3/main.cpp
@ -27,7 +27,7 @@
 int main(int, char**)
 {
    // Setup SDL
-    if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_GAMEPAD))
+    if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMEPAD))
    {
        printf("Error: SDL_Init(): %s\n", SDL_GetError());
        return -1;
--- a/examples/example_sdl3_sdlrenderer3/main.cpp
+++ b/examples/example_sdl3_sdlrenderer3/main.cpp
@ -25,7 +25,7 @@
 int main(int, char**)
 {
    // Setup SDL
-    if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_GAMEPAD))
+    if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMEPAD))
    {
        printf("Error: SDL_Init(): %s\n", SDL_GetError());
        return -1;
--- a/imgui.cpp
+++ b/imgui.cpp
@ -1,4 +1,4 @@
-// dear imgui, v1.91.2 WIP
+// dear imgui, v1.91.3 WIP
 // (main code and documentation)

 // Help:
@ -79,7 +79,7 @@ CODE
 // [SECTION] MAIN CODE (most of the code! lots of stuff, needs tidying up!)
 // [SECTION] ID STACK
 // [SECTION] INPUTS
-// [SECTION] ERROR CHECKING
+// [SECTION] ERROR CHECKING, STATE RECOVERY
 // [SECTION] ITEM SUBMISSION
 // [SECTION] LAYOUT
 // [SECTION] SCROLLING
@ -1394,12 +1394,18 @@ ImGuiIO::ImGuiIO()
    ConfigDragClickToInputText = false;
    ConfigWindowsResizeFromEdges = true;
    ConfigWindowsMoveFromTitleBarOnly = false;
+    ConfigScrollbarScrollByPage = true;
    ConfigMemoryCompactTimer = 60.0f;
    ConfigDebugIsDebuggerPresent = false;
    ConfigDebugHighlightIdConflicts = true;
    ConfigDebugBeginReturnValueOnce = false;
    ConfigDebugBeginReturnValueLoop = false;

+    ConfigErrorRecovery = true;
+    ConfigErrorRecoveryEnableAssert = true;
+    ConfigErrorRecoveryEnableDebugLog = true;
+    ConfigErrorRecoveryEnableTooltip = true;
+
    // Inputs Behaviors
    MouseDoubleClickTime = 0.30f;
    MouseDoubleClickMaxDist = 6.0f;
@ -3272,7 +3278,7 @@ void ImGui::PopStyleColor(int count)
    ImGuiContext& g = *GImGui;
    if (g.ColorStack.Size < count)
    {
-        IM_ASSERT_USER_ERROR(g.ColorStack.Size > count, "Calling PopStyleColor() too many times!");
+        IM_ASSERT_USER_ERROR(0, "Calling PopStyleColor() too many times!");
        count = g.ColorStack.Size;
    }
    while (count > 0)
@ -3389,7 +3395,7 @@ void ImGui::PopStyleVar(int count)
    ImGuiContext& g = *GImGui;
    if (g.StyleVarStack.Size < count)
    {
-        IM_ASSERT_USER_ERROR(g.StyleVarStack.Size > count, "Calling PopStyleVar() too many times!");
+        IM_ASSERT_USER_ERROR(0, "Calling PopStyleVar() too many times!");
        count = g.StyleVarStack.Size;
    }
    while (count > 0)
@ -3798,6 +3804,219 @@ static const ImGuiLocEntry GLocalizationEntriesEnUS[] =
    { ImGuiLocKey_CopyLink,             "Copy Link###CopyLink"                  },
 };

+ImGuiContext::ImGuiContext(ImFontAtlas* shared_font_atlas)
+{
+    IO.Ctx = this;
+    InputTextState.Ctx = this;
+
+    Initialized = false;
+    FontAtlasOwnedByContext = shared_font_atlas ? false : true;
+    Font = NULL;
+    FontSize = FontBaseSize = FontScale = CurrentDpiScale = 0.0f;
+    IO.Fonts = shared_font_atlas ? shared_font_atlas : IM_NEW(ImFontAtlas)();
+    Time = 0.0f;
+    FrameCount = 0;
+    FrameCountEnded = FrameCountRendered = -1;
+    WithinFrameScope = WithinFrameScopeWithImplicitWindow = WithinEndChild = false;
+    GcCompactAll = false;
+    TestEngineHookItems = false;
+    TestEngine = NULL;
+    memset(ContextName, 0, sizeof(ContextName));
+
+    InputEventsNextMouseSource = ImGuiMouseSource_Mouse;
+    InputEventsNextEventId = 1;
+
+    WindowsActiveCount = 0;
+    CurrentWindow = NULL;
+    HoveredWindow = NULL;
+    HoveredWindowUnderMovingWindow = NULL;
+    HoveredWindowBeforeClear = NULL;
+    MovingWindow = NULL;
+    WheelingWindow = NULL;
+    WheelingWindowStartFrame = WheelingWindowScrolledFrame = -1;
+    WheelingWindowReleaseTimer = 0.0f;
+
+    DebugDrawIdConflicts = 0;
+    DebugHookIdInfo = 0;
+    HoveredId = HoveredIdPreviousFrame = 0;
+    HoveredIdPreviousFrameItemCount = 0;
+    HoveredIdAllowOverlap = false;
+    HoveredIdIsDisabled = false;
+    HoveredIdTimer = HoveredIdNotActiveTimer = 0.0f;
+    ItemUnclipByLog = false;
+    ActiveId = 0;
+    ActiveIdIsAlive = 0;
+    ActiveIdTimer = 0.0f;
+    ActiveIdIsJustActivated = false;
+    ActiveIdAllowOverlap = false;
+    ActiveIdNoClearOnFocusLoss = false;
+    ActiveIdHasBeenPressedBefore = false;
+    ActiveIdHasBeenEditedBefore = false;
+    ActiveIdHasBeenEditedThisFrame = false;
+    ActiveIdFromShortcut = false;
+    ActiveIdClickOffset = ImVec2(-1, -1);
+    ActiveIdWindow = NULL;
+    ActiveIdSource = ImGuiInputSource_None;
+    ActiveIdMouseButton = -1;
+    ActiveIdPreviousFrame = 0;
+    ActiveIdPreviousFrameIsAlive = false;
+    ActiveIdPreviousFrameHasBeenEditedBefore = false;
+    ActiveIdPreviousFrameWindow = NULL;
+    LastActiveId = 0;
+    LastActiveIdTimer = 0.0f;
+
+    LastKeyboardKeyPressTime = LastKeyModsChangeTime = LastKeyModsChangeFromNoneTime = -1.0;
+
+    ActiveIdUsingNavDirMask = 0x00;
+    ActiveIdUsingAllKeyboardKeys = false;
+
+    CurrentFocusScopeId = 0;
+    CurrentItemFlags = ImGuiItemFlags_None;
+    DebugShowGroupRects = false;
+
+    NavWindow = NULL;
+    NavId = NavFocusScopeId = NavActivateId = NavActivateDownId = NavActivatePressedId = 0;
+    NavLayer = ImGuiNavLayer_Main;
+    NavNextActivateId = 0;
+    NavActivateFlags = NavNextActivateFlags = ImGuiActivateFlags_None;
+    NavHighlightActivatedId = 0;
+    NavHighlightActivatedTimer = 0.0f;
+    NavInputSource = ImGuiInputSource_Keyboard;
+    NavLastValidSelectionUserData = ImGuiSelectionUserData_Invalid;
+    NavIdIsAlive = false;
+    NavMousePosDirty = false;
+    NavDisableHighlight = true;
+    NavDisableMouseHover = false;
+
+    NavAnyRequest = false;
+    NavInitRequest = false;
+    NavInitRequestFromMove = false;
+    NavMoveSubmitted = false;
+    NavMoveScoringItems = false;
+    NavMoveForwardToNextFrame = false;
+    NavMoveFlags = ImGuiNavMoveFlags_None;
+    NavMoveScrollFlags = ImGuiScrollFlags_None;
+    NavMoveKeyMods = ImGuiMod_None;
+    NavMoveDir = NavMoveDirForDebug = NavMoveClipDir = ImGuiDir_None;
+    NavScoringDebugCount = 0;
+    NavTabbingDir = 0;
+    NavTabbingCounter = 0;
+
+    NavJustMovedFromFocusScopeId = NavJustMovedToId = NavJustMovedToFocusScopeId = 0;
+    NavJustMovedToKeyMods = ImGuiMod_None;
+    NavJustMovedToIsTabbing = false;
+    NavJustMovedToHasSelectionData = false;
+
+    // All platforms use Ctrl+Tab but Ctrl<>Super are swapped on Mac...
+    // FIXME: Because this value is stored, it annoyingly interfere with toggling io.ConfigMacOSXBehaviors updating this..
+    ConfigNavWindowingKeyNext = IO.ConfigMacOSXBehaviors ? (ImGuiMod_Super | ImGuiKey_Tab) : (ImGuiMod_Ctrl | ImGuiKey_Tab);
+    ConfigNavWindowingKeyPrev = IO.ConfigMacOSXBehaviors ? (ImGuiMod_Super | ImGuiMod_Shift | ImGuiKey_Tab) : (ImGuiMod_Ctrl | ImGuiMod_Shift | ImGuiKey_Tab);
+    NavWindowingTarget = NavWindowingTargetAnim = NavWindowingListWindow = NULL;
+    NavWindowingTimer = NavWindowingHighlightAlpha = 0.0f;
+    NavWindowingToggleLayer = false;
+    NavWindowingToggleKey = ImGuiKey_None;
+
+    DimBgRatio = 0.0f;
+
+    DragDropActive = DragDropWithinSource = DragDropWithinTarget = false;
+    DragDropSourceFlags = ImGuiDragDropFlags_None;
+    DragDropSourceFrameCount = -1;
+    DragDropMouseButton = -1;
+    DragDropTargetId = 0;
+    DragDropAcceptFlags = ImGuiDragDropFlags_None;
+    DragDropAcceptIdCurrRectSurface = 0.0f;
+    DragDropAcceptIdPrev = DragDropAcceptIdCurr = 0;
+    DragDropAcceptFrameCount = -1;
+    DragDropHoldJustPressedId = 0;
+    memset(DragDropPayloadBufLocal, 0, sizeof(DragDropPayloadBufLocal));
+
+    ClipperTempDataStacked = 0;
+
+    CurrentTable = NULL;
+    TablesTempDataStacked = 0;
+    CurrentTabBar = NULL;
+    CurrentMultiSelect = NULL;
+    MultiSelectTempDataStacked = 0;
+
+    HoverItemDelayId = HoverItemDelayIdPreviousFrame = HoverItemUnlockedStationaryId = HoverWindowUnlockedStationaryId = 0;
+    HoverItemDelayTimer = HoverItemDelayClearTimer = 0.0f;
+
+    MouseCursor = ImGuiMouseCursor_Arrow;
+    MouseStationaryTimer = 0.0f;
+
+    TempInputId = 0;
+    memset(&DataTypeZeroValue, 0, sizeof(DataTypeZeroValue));
+    BeginMenuDepth = BeginComboDepth = 0;
+    ColorEditOptions = ImGuiColorEditFlags_DefaultOptions_;
+    ColorEditCurrentID = ColorEditSavedID = 0;
+    ColorEditSavedHue = ColorEditSavedSat = 0.0f;
+    ColorEditSavedColor = 0;
+    WindowResizeRelativeMode = false;
+    ScrollbarSeekMode = 0;
+    ScrollbarClickDeltaToGrabCenter = 0.0f;
+    SliderGrabClickOffset = 0.0f;
+    SliderCurrentAccum = 0.0f;
+    SliderCurrentAccumDirty = false;
+    DragCurrentAccumDirty = false;
+    DragCurrentAccum = 0.0f;
+    DragSpeedDefaultRatio = 1.0f / 100.0f;
+    DisabledAlphaBackup = 0.0f;
+    DisabledStackSize = 0;
+    LockMarkEdited = 0;
+    TooltipOverrideCount = 0;
+
+    PlatformImeData.InputPos = ImVec2(0.0f, 0.0f);
+    PlatformImeDataPrev.InputPos = ImVec2(-1.0f, -1.0f); // Different to ensure initial submission
+
+    SettingsLoaded = false;
+    SettingsDirtyTimer = 0.0f;
+    HookIdNext = 0;
+
+    memset(LocalizationTable, 0, sizeof(LocalizationTable));
+
+    LogEnabled = false;
+    LogType = ImGuiLogType_None;
+    LogNextPrefix = LogNextSuffix = NULL;
+    LogFile = NULL;
+    LogLinePosY = FLT_MAX;
+    LogLineFirstItem = false;
+    LogDepthRef = 0;
+    LogDepthToExpand = LogDepthToExpandDefault = 2;
+
+    ErrorCallback = NULL;
+    ErrorCallbackUserData = NULL;
+    ErrorFirst = true;
+    ErrorCountCurrentFrame = 0;
+    StackSizesInBeginForCurrentWindow = NULL;
+
+    DebugDrawIdConflictsCount = 0;
+    DebugLogFlags = ImGuiDebugLogFlags_EventError | ImGuiDebugLogFlags_OutputToTTY;
+    DebugLocateId = 0;
+    DebugLogSkippedErrors = 0;
+    DebugLogAutoDisableFlags = ImGuiDebugLogFlags_None;
+    DebugLogAutoDisableFrames = 0;
+    DebugLocateFrames = 0;
+    DebugBeginReturnValueCullDepth = -1;
+    DebugItemPickerActive = false;
+    DebugItemPickerMouseButton = ImGuiMouseButton_Left;
+    DebugItemPickerBreakId = 0;
+    DebugFlashStyleColorTime = 0.0f;
+    DebugFlashStyleColorIdx = ImGuiCol_COUNT;
+
+    // Same as DebugBreakClearData(). Those fields are scattered in their respective subsystem to stay in hot-data locations
+    DebugBreakInWindow = 0;
+    DebugBreakInTable = 0;
+    DebugBreakInLocateId = false;
+    DebugBreakKeyChord = ImGuiKey_Pause;
+    DebugBreakInShortcutRouting = ImGuiKey_None;
+
+    memset(FramerateSecPerFrame, 0, sizeof(FramerateSecPerFrame));
+    FramerateSecPerFrameIdx = FramerateSecPerFrameCount = 0;
+    FramerateSecPerFrameAccum = 0.0f;
+    WantCaptureMouseNextFrame = WantCaptureKeyboardNextFrame = WantTextInputNextFrame = -1;
+    memset(TempKeychordName, 0, sizeof(TempKeychordName));
+}
+
 void ImGui::Initialize()
 {
    ImGuiContext& g = *GImGui;
@ -4003,6 +4222,7 @@ static void SetCurrentWindow(ImGuiWindow* window)
 {
    ImGuiContext& g = *GImGui;
    g.CurrentWindow = window;
+    g.StackSizesInBeginForCurrentWindow = g.CurrentWindow ? &g.CurrentWindowStack.back().StackSizesInBegin : NULL;
    g.CurrentTable = window && window->DC.CurrentTableIdx != -1 ? g.Tables.GetByIndex(window->DC.CurrentTableIdx) : NULL;
    g.CurrentDpiScale = 1.0f; // FIXME-DPI: WIP this is modified in docking
    if (window)
@ -4848,6 +5068,7 @@ void ImGui::NewFrame()
        KeepAliveID(g.DragDropPayload.SourceId);

    // [DEBUG]
+    if (!g.IO.ConfigDebugHighlightIdConflicts || !g.IO.KeyCtrl) // Count is locked while holding CTRL
        g.DebugDrawIdConflicts = 0;
    if (g.IO.ConfigDebugHighlightIdConflicts && g.HoveredIdPreviousFrameItemCount > 1)
        g.DebugDrawIdConflicts = g.HoveredIdPreviousFrame;
@ -4950,8 +5171,25 @@ void ImGui::NewFrame()
    // Update mouse input state
    UpdateMouseInputs();

+    // Mark all windows as not visible and compact unused memory.
+    IM_ASSERT(g.WindowsFocusOrder.Size <= g.Windows.Size);
+    const float memory_compact_start_time = (g.GcCompactAll || g.IO.ConfigMemoryCompactTimer < 0.0f) ? FLT_MAX : (float)g.Time - g.IO.ConfigMemoryCompactTimer;
+    for (ImGuiWindow* window : g.Windows)
+    {
+        window->WasActive = window->Active;
+        window->Active = false;
+        window->WriteAccessed = false;
+        window->BeginCountPreviousFrame = window->BeginCount;
+        window->BeginCount = 0;
+
+        // Garbage collect transient buffers of recently unused windows
+        if (!window->WasActive && !window->MemoryCompacted && window->LastTimeActive < memory_compact_start_time)
+            GcCompactTransientWindowBuffers(window);
+    }
+
    // Find hovered window
    // (needs to be before UpdateMouseMovingWindowNewFrame so we fill g.HoveredWindowUnderMovingWindow on the mouse release frame)
+    // (currently needs to be done after the WasActive=Active loop and FindHoveredWindowEx uses ->Active)
    UpdateHoveredWindowAndCaptureFlags();

    // Handle user moving window with mouse (at the beginning of the frame to avoid input lag or sheering)
@ -4973,22 +5211,6 @@ void ImGui::NewFrame()
    // Mouse wheel scrolling, scale
    UpdateMouseWheel();

-    // Mark all windows as not visible and compact unused memory.
-    IM_ASSERT(g.WindowsFocusOrder.Size <= g.Windows.Size);
-    const float memory_compact_start_time = (g.GcCompactAll || g.IO.ConfigMemoryCompactTimer < 0.0f) ? FLT_MAX : (float)g.Time - g.IO.ConfigMemoryCompactTimer;
-    for (ImGuiWindow* window : g.Windows)
-    {
-        window->WasActive = window->Active;
-        window->Active = false;
-        window->WriteAccessed = false;
-        window->BeginCountPreviousFrame = window->BeginCount;
-        window->BeginCount = 0;
-
-        // Garbage collect transient buffers of recently unused windows
-        if (!window->WasActive && !window->MemoryCompacted && window->LastTimeActive < memory_compact_start_time)
-            GcCompactTransientWindowBuffers(window);
-    }
-
    // Garbage collect transient buffers of recently unused tables
    for (int i = 0; i < g.TablesLastTimeActive.Size; i++)
        if (g.TablesLastTimeActive[i] >= 0.0f && g.TablesLastTimeActive[i] < memory_compact_start_time)
@ -5039,6 +5261,10 @@ void ImGui::NewFrame()
    Begin("Debug##Default");
    IM_ASSERT(g.CurrentWindow->IsFallbackWindow == true);

+    // Store stack sizes
+    g.ErrorCountCurrentFrame = 0;
+    ErrorRecoveryStoreState(&g.StackSizesInNewFrame);
+
    // [DEBUG] When io.ConfigDebugBeginReturnValue is set, we make Begin()/BeginChild() return false at different level of the window-stack,
    // allowing to validate correct Begin/End behavior in user code.
 #ifndef IMGUI_DISABLE_DEBUG_TOOLS
@ -5255,32 +5481,13 @@ void ImGui::EndFrame()
        return;
    IM_ASSERT(g.WithinFrameScope && "Forgot to call ImGui::NewFrame()?");

-#ifndef IMGUI_DISABLE_DEBUG_TOOLS
-    if (g.DebugDrawIdConflicts != 0)
-    {
-        PushStyleColor(ImGuiCol_PopupBg, ImLerp(g.Style.Colors[ImGuiCol_PopupBg], ImVec4(1.0f, 0.0f, 0.0f, 1.0f), 0.10f));
-        if (g.DebugItemPickerActive == false && BeginTooltipEx(ImGuiTooltipFlags_OverridePrevious, ImGuiWindowFlags_None))
-        {
-            SeparatorText("MESSAGE FROM DEAR IMGUI");
-            Text("Programmer error: %d visible items with conflicting ID!", g.HoveredIdPreviousFrameItemCount);
-            BulletText("Code should use PushID()/PopID() in loops, or append \"##xx\" to same-label identifiers!");
-            BulletText("Empty label e.g. Button(\"\") == same ID as parent widget/node. Use Button(\"##xx\") instead!");
-            BulletText("Press F1 to open \"FAQ -> About the ID Stack System\" and read details.");
-            BulletText("Press CTRL+P to activate Item Picker and debug-break in item call-stack.");
-            BulletText("Set io.ConfigDebugDetectIdConflicts=false to disable this warning in non-programmers builds.");
-            EndTooltip();
-        }
-        PopStyleColor();
-        if (Shortcut(ImGuiMod_Ctrl | ImGuiKey_P, ImGuiInputFlags_RouteGlobal))
-            DebugStartItemPicker();
-        if (Shortcut(ImGuiKey_F1, ImGuiInputFlags_RouteGlobal) && g.PlatformIO.Platform_OpenInShellFn != NULL)
-            g.PlatformIO.Platform_OpenInShellFn(&g, "https://github.com/ocornut/imgui/blob/master/docs/FAQ.md#qa-usage");
-    }
-#endif
-
    CallContextHooks(&g, ImGuiContextHookType_EndFramePre);

+    // [EXPERIMENTAL] Recover from errors
+    if (g.IO.ConfigErrorRecovery)
+        ErrorRecoveryTryToRecoverState(&g.StackSizesInNewFrame);
    ErrorCheckEndFrameSanityChecks();
+    ErrorCheckEndFrameFinalizeErrorTooltip();

    // Notify Platform/OS when our Input Method Editor cursor has moved (e.g. CJK inputs using Microsoft IME)
    ImGuiPlatformImeData* ime_data = &g.PlatformImeData;
@ -5474,7 +5681,7 @@ void ImGui::FindHoveredWindowEx(const ImVec2& pos, bool find_first_and_in_any_vi
    {
        ImGuiWindow* window = g.Windows[i];
        IM_MSVC_WARNING_SUPPRESS(28182); // [Static Analyzer] Dereferencing NULL pointer.
-        if (!window->Active || window->Hidden)
+        if (!window->WasActive || window->Hidden)
            continue;
        if (window->Flags & ImGuiWindowFlags_NoMouseInputs)
            continue;
@ -5731,18 +5938,35 @@ bool ImGui::BeginChildEx(const char* name, ImGuiID id, const ImVec2& size_arg, I
        window_flags |= ImGuiWindowFlags_NoMove;
    }

-    // Forward child flags
-    g.NextWindowData.Flags |= ImGuiNextWindowDataFlags_HasChildFlags;
-    g.NextWindowData.ChildFlags = child_flags;
-
    // Forward size
    // Important: Begin() has special processing to switch condition to ImGuiCond_FirstUseEver for a given axis when ImGuiChildFlags_ResizeXXX is set.
    // (the alternative would to store conditional flags per axis, which is possible but more code)
    const ImVec2 size_avail = GetContentRegionAvail();
    const ImVec2 size_default((child_flags & ImGuiChildFlags_AutoResizeX) ? 0.0f : size_avail.x, (child_flags & ImGuiChildFlags_AutoResizeY) ? 0.0f : size_avail.y);
-    const ImVec2 size = CalcItemSize(size_arg, size_default.x, size_default.y);
+    ImVec2 size = CalcItemSize(size_arg, size_default.x, size_default.y);
+
+    // A SetNextWindowSize() call always has priority (#8020)
+    // (since the code in Begin() never supported SizeVal==0.0f aka auto-resize via SetNextWindowSize() call, we don't support it here for now)
+    // FIXME: We only support ImGuiCond_Always in this path. Supporting other paths would requires to obtain window pointer.
+    if ((g.NextWindowData.Flags & ImGuiNextWindowDataFlags_HasSize) != 0 && (g.NextWindowData.SizeCond & ImGuiCond_Always) != 0)
+    {
+        if (g.NextWindowData.SizeVal.x > 0.0f)
+        {
+            size.x = g.NextWindowData.SizeVal.x;
+            child_flags &= ~ImGuiChildFlags_ResizeX;
+        }
+        if (g.NextWindowData.SizeVal.y > 0.0f)
+        {
+            size.y = g.NextWindowData.SizeVal.y;
+            child_flags &= ~ImGuiChildFlags_ResizeY;
+        }
+    }
    SetNextWindowSize(size);

+    // Forward child flags
+    g.NextWindowData.Flags |= ImGuiNextWindowDataFlags_HasChildFlags;
+    g.NextWindowData.ChildFlags = child_flags;
+
    // Build up name. If you need to append to a same child from multiple location in the ID stack, use BeginChild(ImGuiID id) with a stable value.
    // FIXME: 2023/11/14: commented out shorted version. We had an issue with multiple ### in child window path names, which the trailing hash helped workaround.
    // e.g. "ParentName###ParentIdentifier/ChildName###ChildIdentifier" would get hashed incorrectly by ImHashStr(), trailing _%08X somehow fixes it.
@ -6755,12 +6979,13 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)

    // Add to stack
    g.CurrentWindow = window;
-    ImGuiWindowStackData window_stack_data;
+    g.CurrentWindowStack.resize(g.CurrentWindowStack.Size + 1);
+    ImGuiWindowStackData& window_stack_data = g.CurrentWindowStack.back();
    window_stack_data.Window = window;
    window_stack_data.ParentLastItemDataBackup = g.LastItemData;
-    window_stack_data.StackSizesOnBegin.SetToContextState(&g);
    window_stack_data.DisabledOverrideReenable = (flags & ImGuiWindowFlags_Tooltip) && (g.CurrentItemFlags & ImGuiItemFlags_Disabled);
-    g.CurrentWindowStack.push_back(window_stack_data);
+    ErrorRecoveryStoreState(&window_stack_data.StackSizesInBegin);
+    g.StackSizesInBeginForCurrentWindow = &window_stack_data.StackSizesInBegin;
    if (flags & ImGuiWindowFlags_ChildMenu)
        g.BeginMenuDepth++;

@ -7488,7 +7713,11 @@ void ImGui::End()
        g.BeginMenuDepth--;
    if (window->Flags & ImGuiWindowFlags_Popup)
        g.BeginPopupStack.pop_back();
-    window_stack_data.StackSizesOnBegin.CompareWithContextState(&g);
+
+    // Error handling, state recovery
+    if (g.IO.ConfigErrorRecovery)
+        ErrorRecoveryTryToRecoverWindowState(&window_stack_data.StackSizesInBegin);
+
    g.CurrentWindowStack.pop_back();
    SetCurrentWindow(g.CurrentWindowStack.Size == 0 ? NULL : g.CurrentWindowStack.back().Window);
 }
@ -7702,7 +7931,11 @@ void ImGui::PushFont(ImFont* font)
 void  ImGui::PopFont()
 {
    ImGuiContext& g = *GImGui;
-    IM_ASSERT(g.FontStack.Size > 0);
+    if (g.FontStack.Size <= 0)
+    {
+        IM_ASSERT_USER_ERROR(0, "Calling PopFont() too many times!");
+        return;
+    }
    g.FontStack.pop_back();
    ImFont* font = g.FontStack.Size == 0 ? GetDefaultFont() : g.FontStack.back();
    SetCurrentFont(font);
@ -7725,7 +7958,11 @@ void ImGui::PushItemFlag(ImGuiItemFlags option, bool enabled)
 void ImGui::PopItemFlag()
 {
    ImGuiContext& g = *GImGui;
-    IM_ASSERT(g.ItemFlagsStack.Size > 1); // Too many calls to PopItemFlag() - we always leave a 0 at the bottom of the stack.
+    if (g.ItemFlagsStack.Size <= 1)
+    {
+        IM_ASSERT_USER_ERROR(0, "Calling PopItemFlag() too many times!");
+        return;
+    }
    g.ItemFlagsStack.pop_back();
    g.CurrentItemFlags = g.ItemFlagsStack.back();
 }
@ -7734,8 +7971,9 @@ void ImGui::PopItemFlag()
 // - Those can be nested but it cannot be used to enable an already disabled section (a single BeginDisabled(true) in the stack is enough to keep everything disabled)
 // - Visually this is currently altering alpha, but it is expected that in a future styling system this would work differently.
 // - Feedback welcome at https://github.com/ocornut/imgui/issues/211
-// - BeginDisabled(false) essentially does nothing useful but is provided to facilitate use of boolean expressions. If you can avoid calling BeginDisabled(False)/EndDisabled() best to avoid it.
-// - Optimized shortcuts instead of PushStyleVar() + PushItemFlag()
+// - BeginDisabled(false)/EndDisabled() essentially does nothing but is provided to facilitate use of boolean expressions.
+//   (as a micro-optimization: if you have tens of thousands of BeginDisabled(false)/EndDisabled() pairs, you might want to reformulate your code to avoid making those calls)
+// - Note: mixing up BeginDisabled() and PushItemFlag(ImGuiItemFlags_Disabled) is currently NOT SUPPORTED.
 void ImGui::BeginDisabled(bool disabled)
 {
    ImGuiContext& g = *GImGui;
@ -7754,7 +7992,11 @@ void ImGui::BeginDisabled(bool disabled)
 void ImGui::EndDisabled()
 {
    ImGuiContext& g = *GImGui;
-    IM_ASSERT(g.DisabledStackSize > 0);
+    if (g.DisabledStackSize <= 0)
+    {
+        IM_ASSERT_USER_ERROR(0, "Calling EndDisabled() too many times!");
+        return;
+    }
    g.DisabledStackSize--;
    bool was_disabled = (g.CurrentItemFlags & ImGuiItemFlags_Disabled) != 0;
    //PopItemFlag();
@ -7789,14 +8031,21 @@ void ImGui::EndDisabledOverrideReenable()

 void ImGui::PushTextWrapPos(float wrap_pos_x)
 {
-    ImGuiWindow* window = GetCurrentWindow();
+    ImGuiContext& g = *GImGui;
+    ImGuiWindow* window = g.CurrentWindow;
    window->DC.TextWrapPosStack.push_back(window->DC.TextWrapPos);
    window->DC.TextWrapPos = wrap_pos_x;
 }

 void ImGui::PopTextWrapPos()
 {
-    ImGuiWindow* window = GetCurrentWindow();
+    ImGuiContext& g = *GImGui;
+    ImGuiWindow* window = g.CurrentWindow;
+    if (window->DC.TextWrapPosStack.Size <= 0)
+    {
+        IM_ASSERT_USER_ERROR(0, "Calling PopTextWrapPos() too many times!");
+        return;
+    }
    window->DC.TextWrapPos = window->DC.TextWrapPosStack.back();
    window->DC.TextWrapPosStack.pop_back();
 }
@ -8229,9 +8478,9 @@ void ImGui::PushFocusScope(ImGuiID id)
 void ImGui::PopFocusScope()
 {
    ImGuiContext& g = *GImGui;
-    if (g.FocusScopeStack.Size == 0)
+    if (g.FocusScopeStack.Size <= g.StackSizesInBeginForCurrentWindow->SizeOfFocusScopeStack)
    {
-        IM_ASSERT_USER_ERROR(g.FocusScopeStack.Size > 0, "Calling PopFocusScope() too many times!");
+        IM_ASSERT_USER_ERROR(0, "Calling PopFocusScope() too many times!");
        return;
    }
    g.FocusScopeStack.pop_back();
@ -8502,7 +8751,11 @@ ImGuiID ImGui::GetIDWithSeed(int n, ImGuiID seed)
 void ImGui::PopID()
 {
    ImGuiWindow* window = GImGui->CurrentWindow;
-    IM_ASSERT(window->IDStack.Size > 1); // Too many PopID(), or could be popping in a wrong/different window?
+    if (window->IDStack.Size <= 1)
+    {
+        IM_ASSERT_USER_ERROR(0, "Calling PopID() too many times!");
+        return;
+    }
    window->IDStack.pop_back();
 }

@ -10068,7 +10321,16 @@ bool ImGui::Shortcut(ImGuiKeyChord key_chord, ImGuiInputFlags flags, ImGuiID own


 //-----------------------------------------------------------------------------
-// [SECTION] ERROR CHECKING
+// [SECTION] ERROR CHECKING, STATE RECOVERY
+//-----------------------------------------------------------------------------
+// - DebugCheckVersionAndDataLayout() (called via IMGUI_CHECKVERSION() macros)
+// - ErrorCheckUsingSetCursorPosToExtendParentBoundaries()
+// - ErrorCheckNewFrameSanityChecks()
+// - ErrorCheckEndFrameSanityChecks()
+// - ErrorRecoveryStoreState()
+// - ErrorRecoveryTryToRecoverState()
+// - ErrorRecoveryTryToRecoverWindowState()
+// - ErrorLog()
 //-----------------------------------------------------------------------------

 // Verify ABI compatibility between caller code and compiled version of Dear ImGui. This helps detects some build issues.
@ -10167,6 +10429,10 @@ static void ImGui::ErrorCheckNewFrameSanityChecks()
        IM_ASSERT(g.IO.KeyMap[ImGuiKey_Space] != -1 && "ImGuiKey_Space is not mapped, required for keyboard navigation.");
 #endif

+    // Error handling: we do not accept 100% silent recovery! Please contact me if you feel this is getting in your way.
+    if (g.IO.ConfigErrorRecovery)
+        IM_ASSERT(g.IO.ConfigErrorRecoveryEnableAssert || g.IO.ConfigErrorRecoveryEnableDebugLog || g.IO.ConfigErrorRecoveryEnableTooltip || g.ErrorCallback != NULL);
+
    // Remap legacy clipboard handlers (OBSOLETED in 1.91.1, August 2024)
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
    if (g.IO.GetClipboardTextFn != NULL && (g.PlatformIO.Platform_GetClipboardTextFn == NULL || g.PlatformIO.Platform_GetClipboardTextFn == Platform_GetClipboardTextFn_DefaultImpl))
@ -10178,114 +10444,115 @@ static void ImGui::ErrorCheckNewFrameSanityChecks()

 static void ImGui::ErrorCheckEndFrameSanityChecks()
 {
-    ImGuiContext& g = *GImGui;
-
    // Verify that io.KeyXXX fields haven't been tampered with. Key mods should not be modified between NewFrame() and EndFrame()
    // One possible reason leading to this assert is that your backends update inputs _AFTER_ NewFrame().
    // It is known that when some modal native windows called mid-frame takes focus away, some backends such as GLFW will
    // send key release events mid-frame. This would normally trigger this assertion and lead to sheared inputs.
    // We silently accommodate for this case by ignoring the case where all io.KeyXXX modifiers were released (aka key_mod_flags == 0),
    // while still correctly asserting on mid-frame key press events.
+    ImGuiContext& g = *GImGui;
    const ImGuiKeyChord key_mods = GetMergedModsFromKeys();
+    IM_UNUSED(g);
+    IM_UNUSED(key_mods);
    IM_ASSERT((key_mods == 0 || g.IO.KeyMods == key_mods) && "Mismatching io.KeyCtrl/io.KeyShift/io.KeyAlt/io.KeySuper vs io.KeyMods");
    IM_UNUSED(key_mods);

-    // [EXPERIMENTAL] Recover from errors: You may call this yourself before EndFrame().
-    //ErrorCheckEndFrameRecover();
-
-    // Report when there is a mismatch of Begin/BeginChild vs End/EndChild calls. Important: Remember that the Begin/BeginChild API requires you
-    // to always call End/EndChild even if Begin/BeginChild returns false! (this is unfortunately inconsistent with most other Begin* API).
-    if (g.CurrentWindowStack.Size != 1)
-    {
-        if (g.CurrentWindowStack.Size > 1)
-        {
-            ImGuiWindow* window = g.CurrentWindowStack.back().Window; // <-- This window was not Ended!
-            IM_ASSERT_USER_ERROR(g.CurrentWindowStack.Size == 1, "Mismatched Begin/BeginChild vs End/EndChild calls: did you forget to call End/EndChild?");
-            IM_UNUSED(window);
-            while (g.CurrentWindowStack.Size > 1)
-                End();
-        }
-        else
-        {
-            IM_ASSERT_USER_ERROR(g.CurrentWindowStack.Size == 1, "Mismatched Begin/BeginChild vs End/EndChild calls: did you call End/EndChild too much?");
-        }
+    IM_ASSERT(g.CurrentWindowStack.Size == 1);
+    IM_ASSERT(g.CurrentWindowStack[0].Window->IsFallbackWindow);
 }

-    IM_ASSERT_USER_ERROR(g.GroupStack.Size == 0, "Missing EndGroup call!");
+// Save current stack sizes. Called e.g. by NewFrame() and by Begin() but may be called for manual recovery.
+void ImGui::ErrorRecoveryStoreState(ImGuiErrorRecoveryState* state_out)
+{
+    ImGuiContext& g = *GImGui;
+    state_out->SizeOfWindowStack = (short)g.CurrentWindowStack.Size;
+    state_out->SizeOfIDStack = (short)g.CurrentWindow->IDStack.Size;
+    state_out->SizeOfTreeStack = (short)g.CurrentWindow->DC.TreeDepth; // NOT g.TreeNodeStack.Size which is a partial stack!
+    state_out->SizeOfColorStack = (short)g.ColorStack.Size;
+    state_out->SizeOfStyleVarStack = (short)g.StyleVarStack.Size;
+    state_out->SizeOfFontStack = (short)g.FontStack.Size;
+    state_out->SizeOfFocusScopeStack = (short)g.FocusScopeStack.Size;
+    state_out->SizeOfGroupStack = (short)g.GroupStack.Size;
+    state_out->SizeOfItemFlagsStack = (short)g.ItemFlagsStack.Size;
+    state_out->SizeOfBeginPopupStack = (short)g.BeginPopupStack.Size;
+    state_out->SizeOfDisabledStack = (short)g.DisabledStackSize;
 }

-// Experimental recovery from incorrect usage of BeginXXX/EndXXX/PushXXX/PopXXX calls.
-// Must be called during or before EndFrame().
-// This is generally flawed as we are not necessarily End/Popping things in the right order.
-// FIXME: Can't recover from inside BeginTabItem/EndTabItem yet.
-// FIXME: Can't recover from interleaved BeginTabBar/Begin
-void    ImGui::ErrorCheckEndFrameRecover(ImGuiErrorLogCallback log_callback, void* user_data)
+// Chosen name "Try to recover" over e.g. "Restore" to suggest this is not a 100% guaranteed recovery.
+// Called by e.g. EndFrame() but may be called for manual recovery.
+// Attempt to recover full window stack.
+void ImGui::ErrorRecoveryTryToRecoverState(const ImGuiErrorRecoveryState* state_in)
 {
    // PVS-Studio V1044 is "Loop break conditions do not depend on the number of iterations"
    ImGuiContext& g = *GImGui;
-    while (g.CurrentWindowStack.Size > 0) //-V1044
+    while (g.CurrentWindowStack.Size > state_in->SizeOfWindowStack) //-V1044
    {
-        ErrorCheckEndWindowRecover(log_callback, user_data);
+        // Recap:
+        // - Begin()/BeginChild() return false to indicate the window is collapsed or fully clipped.
+        // - Always call a matching End() for each Begin() call, regardless of its return value!
+        // - Begin/End and BeginChild/EndChild logic is KNOWN TO BE INCONSISTENT WITH ALL OTHER BEGIN/END FUNCTIONS.
+        // - We will fix that in a future major update.
        ImGuiWindow* window = g.CurrentWindow;
-        if (g.CurrentWindowStack.Size == 1)
-        {
-            IM_ASSERT(window->IsFallbackWindow);
-            break;
-        }
        if (window->Flags & ImGuiWindowFlags_ChildWindow)
        {
-            if (log_callback) log_callback(user_data, "Recovered from missing EndChild() for '%s'", window->Name);
+            IM_ASSERT_USER_ERROR(0, "Missing EndChild()");
            EndChild();
        }
        else
        {
-            if (log_callback) log_callback(user_data, "Recovered from missing End() for '%s'", window->Name);
+            IM_ASSERT_USER_ERROR(0, "Missing End()");
            End();
        }
    }
+    if (g.CurrentWindowStack.Size == state_in->SizeOfWindowStack)
+        ErrorRecoveryTryToRecoverWindowState(state_in);
 }

-// Must be called before End()/EndChild()
-void    ImGui::ErrorCheckEndWindowRecover(ImGuiErrorLogCallback log_callback, void* user_data)
+// Called by e.g. End() but may be called for manual recovery.
+// Read '// Error Handling [BETA]' block in imgui_internal.h for details.
+// Attempt to recover from incorrect usage of BeginXXX/EndXXX/PushXXX/PopXXX calls.
+void    ImGui::ErrorRecoveryTryToRecoverWindowState(const ImGuiErrorRecoveryState* state_in)
 {
    ImGuiContext& g = *GImGui;
-    while (g.CurrentTable && (g.CurrentTable->OuterWindow == g.CurrentWindow || g.CurrentTable->InnerWindow == g.CurrentWindow))
+
+    while (g.CurrentTable != NULL && g.CurrentTable->InnerWindow == g.CurrentWindow)
    {
-        if (log_callback) log_callback(user_data, "Recovered from missing EndTable() in '%s'", g.CurrentTable->OuterWindow->Name);
+        IM_ASSERT_USER_ERROR(0, "Missing EndTable()");
        EndTable();
    }

    ImGuiWindow* window = g.CurrentWindow;
-    ImGuiStackSizes* stack_sizes = &g.CurrentWindowStack.back().StackSizesOnBegin;
-    IM_ASSERT(window != NULL);
-    while (g.CurrentTabBar != NULL) //-V1044
+
+    // FIXME: Can't recover from inside BeginTabItem/EndTabItem yet.
+    while (g.CurrentTabBar != NULL && g.CurrentTabBar->Window == window) //-V1044
    {
-        if (log_callback) log_callback(user_data, "Recovered from missing EndTabBar() in '%s'", window->Name);
+        IM_ASSERT_USER_ERROR(0, "Missing EndTabBar()");
        EndTabBar();
    }
    while (g.CurrentMultiSelect != NULL && g.CurrentMultiSelect->Storage->Window == window)
    {
-        if (log_callback) log_callback(user_data, "Recovered from missing EndMultiSelect() in '%s'", window->Name);
+        IM_ASSERT_USER_ERROR(0, "Missing EndMultiSelect()");
        EndMultiSelect();
    }
-    while (window->DC.TreeDepth > 0)
+    while (window->DC.TreeDepth > state_in->SizeOfTreeStack) //-V1044
    {
-        if (log_callback) log_callback(user_data, "Recovered from missing TreePop() in '%s'", window->Name);
+        IM_ASSERT_USER_ERROR(0, "Missing TreePop()");
        TreePop();
    }
-    while (g.GroupStack.Size > stack_sizes->SizeOfGroupStack) //-V1044
+    while (g.GroupStack.Size > state_in->SizeOfGroupStack) //-V1044
    {
-        if (log_callback) log_callback(user_data, "Recovered from missing EndGroup() in '%s'", window->Name);
+        IM_ASSERT_USER_ERROR(0, "Missing EndGroup()");
        EndGroup();
    }
-    while (window->IDStack.Size > 1)
+    IM_ASSERT(g.GroupStack.Size == state_in->SizeOfGroupStack);
+    while (window->IDStack.Size > state_in->SizeOfIDStack) //-V1044
    {
-        if (log_callback) log_callback(user_data, "Recovered from missing PopID() in '%s'", window->Name);
+        IM_ASSERT_USER_ERROR(0, "Missing PopID()");
        PopID();
    }
-    while (g.DisabledStackSize > stack_sizes->SizeOfDisabledStack) //-V1044
+    while (g.DisabledStackSize > state_in->SizeOfDisabledStack) //-V1044
    {
-        if (log_callback) log_callback(user_data, "Recovered from missing EndDisabled() in '%s'", window->Name);
+        IM_ASSERT_USER_ERROR(0, "Missing EndDisabled()");
        if (g.CurrentItemFlags & ImGuiItemFlags_Disabled)
            EndDisabled();
        else
@ -10294,70 +10561,150 @@ void    ImGui::ErrorCheckEndWindowRecover(ImGuiErrorLogCallback log_callback, vo
            g.CurrentWindowStack.back().DisabledOverrideReenable = false;
        }
    }
-    while (g.ColorStack.Size > stack_sizes->SizeOfColorStack)
+    IM_ASSERT(g.DisabledStackSize == state_in->SizeOfDisabledStack);
+    while (g.ColorStack.Size > state_in->SizeOfColorStack)
    {
-        if (log_callback) log_callback(user_data, "Recovered from missing PopStyleColor() in '%s' for ImGuiCol_%s", window->Name, GetStyleColorName(g.ColorStack.back().Col));
+        IM_ASSERT_USER_ERROR(0, "Missing PopStyleColor()");
        PopStyleColor();
    }
-    while (g.ItemFlagsStack.Size > stack_sizes->SizeOfItemFlagsStack) //-V1044
+    while (g.ItemFlagsStack.Size > state_in->SizeOfItemFlagsStack) //-V1044
    {
-        if (log_callback) log_callback(user_data, "Recovered from missing PopItemFlag() in '%s'", window->Name);
+        IM_ASSERT_USER_ERROR(0, "Missing PopItemFlag()");
        PopItemFlag();
    }
-    while (g.StyleVarStack.Size > stack_sizes->SizeOfStyleVarStack) //-V1044
+    while (g.StyleVarStack.Size > state_in->SizeOfStyleVarStack) //-V1044
    {
-        if (log_callback) log_callback(user_data, "Recovered from missing PopStyleVar() in '%s'", window->Name);
+        IM_ASSERT_USER_ERROR(0, "Missing PopStyleVar()");
        PopStyleVar();
    }
-    while (g.FontStack.Size > stack_sizes->SizeOfFontStack) //-V1044
+    while (g.FontStack.Size > state_in->SizeOfFontStack) //-V1044
    {
-        if (log_callback) log_callback(user_data, "Recovered from missing PopFont() in '%s'", window->Name);
+        IM_ASSERT_USER_ERROR(0, "Missing PopFont()");
        PopFont();
    }
-    while (g.FocusScopeStack.Size > stack_sizes->SizeOfFocusScopeStack + 1) //-V1044
+    while (g.FocusScopeStack.Size > state_in->SizeOfFocusScopeStack) //-V1044
    {
-        if (log_callback) log_callback(user_data, "Recovered from missing PopFocusScope() in '%s'", window->Name);
+        IM_ASSERT_USER_ERROR(0, "Missing PopFocusScope()");
        PopFocusScope();
    }
+    //IM_ASSERT(g.FocusScopeStack.Size == state_in->SizeOfFocusScopeStack);
 }

-// Save current stack sizes for later compare
-void ImGuiStackSizes::SetToContextState(ImGuiContext* ctx)
+bool    ImGui::ErrorLog(const char* msg)
 {
-    ImGuiContext& g = *ctx;
+    ImGuiContext& g = *GImGui;
+
+    // Output to debug log
+#ifndef IMGUI_DISABLE_DEBUG_TOOLS
    ImGuiWindow* window = g.CurrentWindow;
-    SizeOfIDStack = (short)window->IDStack.Size;
-    SizeOfColorStack = (short)g.ColorStack.Size;
-    SizeOfStyleVarStack = (short)g.StyleVarStack.Size;
-    SizeOfFontStack = (short)g.FontStack.Size;
-    SizeOfFocusScopeStack = (short)g.FocusScopeStack.Size;
-    SizeOfGroupStack = (short)g.GroupStack.Size;
-    SizeOfItemFlagsStack = (short)g.ItemFlagsStack.Size;
-    SizeOfBeginPopupStack = (short)g.BeginPopupStack.Size;
-    SizeOfDisabledStack = (short)g.DisabledStackSize;
+
+    if (g.IO.ConfigErrorRecoveryEnableDebugLog)
+    {
+        if (g.ErrorFirst)
+            IMGUI_DEBUG_LOG_ERROR("[imgui-error] (current settings: Assert=%d, Log=%d, Tooltip=%d)\n",
+                g.IO.ConfigErrorRecoveryEnableAssert, g.IO.ConfigErrorRecoveryEnableDebugLog, g.IO.ConfigErrorRecoveryEnableTooltip);
+        IMGUI_DEBUG_LOG_ERROR("[imgui-error] In window '%s': %s\n", window ? window->Name : "NULL", msg);
+    }
+    g.ErrorFirst = false;
+
+    // Output to tooltip
+    if (g.IO.ConfigErrorRecoveryEnableTooltip)
+    {
+        if (BeginErrorTooltip())
+        {
+            if (g.ErrorCountCurrentFrame < 20)
+            {
+                Text("In window '%s': %s", window ? window->Name : "NULL", msg);
+                if (window && (!window->IsFallbackWindow || window->WasActive))
+                    GetForegroundDrawList(window)->AddRect(window->Pos, window->Pos + window->Size, IM_COL32(255, 0, 0, 255));
+            }
+            if (g.ErrorCountCurrentFrame == 20)
+                Text("(and more errors)");
+            // EndFrame() will amend debug buttons to this window, after all errors have been submitted.
+            EndErrorTooltip();
+        }
+        g.ErrorCountCurrentFrame++;
+    }
+#endif
+
+    // Output to callback
+    if (g.ErrorCallback != NULL)
+        g.ErrorCallback(&g, g.ErrorCallbackUserData, msg);
+
+    // Return whether we should assert
+    return g.IO.ConfigErrorRecoveryEnableAssert;
 }

-// Compare to detect usage errors
-void ImGuiStackSizes::CompareWithContextState(ImGuiContext* ctx)
+void ImGui::ErrorCheckEndFrameFinalizeErrorTooltip()
 {
-    ImGuiContext& g = *ctx;
-    ImGuiWindow* window = g.CurrentWindow;
-    IM_UNUSED(window);
+#ifndef IMGUI_DISABLE_DEBUG_TOOLS
+    ImGuiContext& g = *GImGui;
+    if (g.DebugDrawIdConflicts != 0 && g.IO.KeyCtrl == false)
+        g.DebugDrawIdConflictsCount = g.HoveredIdPreviousFrameItemCount;
+    if (g.DebugDrawIdConflicts != 0 && g.DebugItemPickerActive == false && BeginErrorTooltip())
+    {
+        Text("Programmer error: %d visible items with conflicting ID!", g.DebugDrawIdConflictsCount);
+        BulletText("Code should use PushID()/PopID() in loops, or append \"##xx\" to same-label identifiers!");
+        BulletText("Empty label e.g. Button(\"\") == same ID as parent widget/node. Use Button(\"##xx\") instead!");
+        BulletText("Set io.ConfigDebugDetectIdConflicts=false to disable this warning in non-programmers builds.");
+        Separator();
+        Text("(Hold CTRL and: use");
+        SameLine();
+        if (SmallButton("Item Picker"))
+            DebugStartItemPicker();
+        SameLine();
+        Text("to break in item call-stack, or");
+        SameLine();
+        if (SmallButton("Open FAQ->About ID Stack System") && g.PlatformIO.Platform_OpenInShellFn != NULL)
+            g.PlatformIO.Platform_OpenInShellFn(&g, "https://github.com/ocornut/imgui/blob/master/docs/FAQ.md#qa-usage");
+        EndErrorTooltip();
+    }

-    // Window stacks
-    // NOT checking: DC.ItemWidth, DC.TextWrapPos (per window) to allow user to conveniently push once and not pop (they are cleared on Begin)
-    IM_ASSERT(SizeOfIDStack         == window->IDStack.Size     && "PushID/PopID or TreeNode/TreePop Mismatch!");
+    if (g.ErrorCountCurrentFrame > 0 && BeginErrorTooltip()) // Amend at end of frame
+    {
+        Separator();
+        Text("(Hold CTRL and:");
+        SameLine();
+        if (SmallButton("Enable Asserts"))
+            g.IO.ConfigErrorRecoveryEnableAssert = true;
+        //SameLine();
+        //if (SmallButton("Hide Error Tooltips"))
+        //    g.IO.ConfigErrorRecoveryEnableTooltip = false; // Too dangerous
+        SameLine(0, 0);
+        Text(")");
+        EndErrorTooltip();
+    }
+#endif
+}

-    // Global stacks
-    // For color, style and font stacks there is an incentive to use Push/Begin/Pop/.../End patterns, so we relax our checks a little to allow them.
-    IM_ASSERT(SizeOfGroupStack      == g.GroupStack.Size        && "BeginGroup/EndGroup Mismatch!");
-    IM_ASSERT(SizeOfBeginPopupStack == g.BeginPopupStack.Size   && "BeginPopup/EndPopup or BeginMenu/EndMenu Mismatch!");
-    IM_ASSERT(SizeOfDisabledStack   == g.DisabledStackSize      && "BeginDisabled/EndDisabled Mismatch!");
-    IM_ASSERT(SizeOfItemFlagsStack  >= g.ItemFlagsStack.Size    && "PushItemFlag/PopItemFlag Mismatch!");
-    IM_ASSERT(SizeOfColorStack      >= g.ColorStack.Size        && "PushStyleColor/PopStyleColor Mismatch!");
-    IM_ASSERT(SizeOfStyleVarStack   >= g.StyleVarStack.Size     && "PushStyleVar/PopStyleVar Mismatch!");
-    IM_ASSERT(SizeOfFontStack       >= g.FontStack.Size         && "PushFont/PopFont Mismatch!");
-    IM_ASSERT(SizeOfFocusScopeStack == g.FocusScopeStack.Size   && "PushFocusScope/PopFocusScope Mismatch!");
+// Pseudo-tooltip. Follow mouse until CTRL is held. When CTRL is held we lock position, allowing to click it.
+bool ImGui::BeginErrorTooltip()
+{
+    ImGuiContext& g = *GImGui;
+    ImGuiWindow* window = FindWindowByName("##Tooltip_Error");
+    const bool use_locked_pos = (g.IO.KeyCtrl && window && window->WasActive);
+    PushStyleColor(ImGuiCol_PopupBg, ImLerp(g.Style.Colors[ImGuiCol_PopupBg], ImVec4(1.0f, 0.0f, 0.0f, 1.0f), 0.15f));
+    if (use_locked_pos)
+        SetNextWindowPos(g.ErrorTooltipLockedPos);
+    bool is_visible = Begin("##Tooltip_Error", NULL, ImGuiWindowFlags_Tooltip | ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_AlwaysAutoResize);
+    PopStyleColor();
+    if (is_visible && g.CurrentWindow->BeginCount == 1)
+    {
+        SeparatorText("MESSAGE FROM DEAR IMGUI");
+        BringWindowToDisplayFront(g.CurrentWindow);
+        BringWindowToFocusFront(g.CurrentWindow);
+        g.ErrorTooltipLockedPos = GetWindowPos();
+    }
+    else if (!is_visible)
+    {
+        End();
+    }
+    return is_visible;
+}
+
+void ImGui::EndErrorTooltip()
+{
+    End();
 }

 //-----------------------------------------------------------------------------
@ -10689,7 +11036,13 @@ void ImGui::PushMultiItemsWidths(int components, float w_full)

 void ImGui::PopItemWidth()
 {
-    ImGuiWindow* window = GetCurrentWindow();
+    ImGuiContext& g = *GImGui;
+    ImGuiWindow* window = g.CurrentWindow;
+    if (window->DC.ItemWidthStack.Size <= 0)
+    {
+        IM_ASSERT_USER_ERROR(0, "Calling PopItemWidth() too many times!");
+        return;
+    }
    window->DC.ItemWidth = window->DC.ItemWidthStack.back();
    window->DC.ItemWidthStack.pop_back();
 }
@ -15999,13 +16352,25 @@ static void ShowDebugLogFlag(const char* name, ImGuiDebugLogFlags flags)
    ImGuiContext& g = *GImGui;
    ImVec2 size(ImGui::GetFrameHeight() + g.Style.ItemInnerSpacing.x + ImGui::CalcTextSize(name).x, ImGui::GetFrameHeight());
    SameLineOrWrap(size); // FIXME-LAYOUT: To be done automatically once we rework ItemSize/ItemAdd into ItemLayout.
+
+    bool highlight_errors = (flags == ImGuiDebugLogFlags_EventError && g.DebugLogSkippedErrors > 0);
+    if (highlight_errors)
+        ImGui::PushStyleColor(ImGuiCol_Text, ImLerp(g.Style.Colors[ImGuiCol_Text], ImVec4(1.0f, 0.0f, 0.0f, 1.0f), 0.30f));
    if (ImGui::CheckboxFlags(name, &g.DebugLogFlags, flags) && g.IO.KeyShift && (g.DebugLogFlags & flags) != 0)
    {
        g.DebugLogAutoDisableFrames = 2;
        g.DebugLogAutoDisableFlags |= flags;
    }
+    if (highlight_errors)
+    {
+        ImGui::PopStyleColor();
+        ImGui::SetItemTooltip("%d past errors skipped.", g.DebugLogSkippedErrors);
+    }
+    else
+    {
        ImGui::SetItemTooltip("Hold SHIFT when clicking to enable for 2 frames only (useful for spammy log entries)");
    }
+}

 void ImGui::ShowDebugLogWindow(bool* p_open)
 {
@ -16022,6 +16387,7 @@ void ImGui::ShowDebugLogWindow(bool* p_open)
    CheckboxFlags("All", &g.DebugLogFlags, all_enable_flags);
    SetItemTooltip("(except InputRouting which is spammy)");

+    ShowDebugLogFlag("Errors", ImGuiDebugLogFlags_EventError);
    ShowDebugLogFlag("ActiveId", ImGuiDebugLogFlags_EventActiveId);
    ShowDebugLogFlag("Clipper", ImGuiDebugLogFlags_EventClipper);
    ShowDebugLogFlag("Focus", ImGuiDebugLogFlags_EventFocus);
@ -16035,6 +16401,7 @@ void ImGui::ShowDebugLogWindow(bool* p_open)
    {
        g.DebugLogBuf.clear();
        g.DebugLogIndex.clear();
+        g.DebugLogSkippedErrors = 0;
    }
    SameLine();
    if (SmallButton("Copy"))
--- a/imgui.h
+++ b/imgui.h
@ -1,4 +1,4 @@
-// dear imgui, v1.91.2 WIP
+// dear imgui, v1.91.3 WIP
 // (headers)

 // Help:
@ -28,8 +28,8 @@

 // Library Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals, e.g. '#if IMGUI_VERSION_NUM >= 12345')
-#define IMGUI_VERSION       "1.91.2 WIP"
-#define IMGUI_VERSION_NUM   19115
+#define IMGUI_VERSION       "1.91.3 WIP"
+#define IMGUI_VERSION_NUM   19123
 #define IMGUI_HAS_TABLE

 /*
@ -888,7 +888,7 @@ namespace ImGui
    // - Disable all user interactions and dim items visuals (applying style.DisabledAlpha over current colors)
    // - Those can be nested but it cannot be used to enable an already disabled section (a single BeginDisabled(true) in the stack is enough to keep everything disabled)
    // - Tooltips windows by exception are opted out of disabling.
-    // - BeginDisabled(false) essentially does nothing useful but is provided to facilitate use of boolean expressions. If you can avoid calling BeginDisabled(False)/EndDisabled() best to avoid it.
+    // - BeginDisabled(false)/EndDisabled() essentially does nothing but is provided to facilitate use of boolean expressions (as a micro-optimization: if you have tens of thousands of BeginDisabled(false)/EndDisabled() pairs, you might want to reformulate your code to avoid making those calls)
    IMGUI_API void          BeginDisabled(bool disabled = true);
    IMGUI_API void          EndDisabled();

@ -2250,6 +2250,7 @@ struct ImGuiIO
    bool        ConfigDragClickToInputText;     // = false          // [BETA] Enable turning DragXXX widgets into text input with a simple mouse click-release (without moving). Not desirable on devices without a keyboard.
    bool        ConfigWindowsResizeFromEdges;   // = true           // Enable resizing of windows from their edges and from the lower-left corner. This requires (io.BackendFlags & ImGuiBackendFlags_HasMouseCursors) because it needs mouse cursor feedback. (This used to be a per-window ImGuiWindowFlags_ResizeFromAnySide flag)
    bool        ConfigWindowsMoveFromTitleBarOnly; // = false       // Enable allowing to move windows only when clicking on their title bar. Does not apply to windows without a title bar.
+    bool        ConfigScrollbarScrollByPage;    // = true           // Enable scrolling page by page when clicking outside the scrollbar grab. When disabled, always scroll to clicked location. When enabled, Shift+Click scrolls to clicked location.
    float       ConfigMemoryCompactTimer;       // = 60.0f          // Timer (in seconds) to free transient windows/tables memory buffers when unused. Set to -1.0f to disable.

    // Inputs Behaviors
@ -2264,6 +2265,23 @@ struct ImGuiIO
    // Debug options
    //------------------------------------------------------------------

+    // Options to configure how we handle recoverable errors [EXPERIMENTAL]
+    // - Error recovery is not perfect nor guaranteed! It is a feature to ease development.
+    // - Functions that support error recovery are using IM_ASSERT_USER_ERROR() instead of IM_ASSERT().
+    // - You not are not supposed to rely on it in the course of a normal application run.
+    // - Possible usage: facilitate recovery from errors triggered from a scripting language or after specific exceptions handlers.
+    // - Always ensure that on programmers seat you have at minimum Asserts or Tooltips enabled when making direct imgui API calls!
+    //   Otherwise it would severely hinder your ability to catch and correct mistakes!
+    // Read https://github.com/ocornut/imgui/wiki/Error-Handling for details about typical usage scenarios:
+    // - Programmer seats: keep asserts (default), or disable asserts and keep error tooltips (new and nice!)
+    // - Non-programmer seats: maybe disable asserts, but make sure errors are resurfaced (visible log entries, use callback etc.)
+    // - Recovery after error from scripting language: record stack sizes before running script, disable assert, trigger breakpoint from ErrorCallback, recover with ErrorRecoveryTryToRecoverState(), restore settings.
+    // - Recovery after an exception handler:  record stack sizes before try {} block, disable assert, set log callback, recover with ErrorRecoveryTryToRecoverState(), restore settings.
+    bool        ConfigErrorRecovery;                // = true       // Enable error recovery support. Some errors won't be detected and lead to direct crashes if recovery is disabled.
+    bool        ConfigErrorRecoveryEnableAssert;    // = true       // Enable asserts on recoverable error. By default call IM_ASSERT() when returning from a failing IM_ASSERT_USER_ERROR()
+    bool        ConfigErrorRecoveryEnableDebugLog;  // = true       // Enable debug log output on recoverable errors.
+    bool        ConfigErrorRecoveryEnableTooltip;   // = true       // Enable tooltip on recoverable errors. The tooltip include a way to enable asserts if they were disabled.
+
    // Option to enable various debug tools showing buttons that will call the IM_DEBUG_BREAK() macro.
    // - The Item Picker tool will be available regardless of this being enabled, in order to maximize its discoverability.
    // - Requires a debugger being attached, otherwise IM_DEBUG_BREAK() options will appear to crash your application.
@ -2292,7 +2310,7 @@ struct ImGuiIO
    bool        ConfigDebugIniSettings;         // = false          // Save .ini data with extra comments (particularly helpful for Docking, but makes saving slower)

    //------------------------------------------------------------------
-    // Platform Functions
+    // Platform Identifiers
    // (the imgui_impl_xxxx backend files are setting those up for you)
    //------------------------------------------------------------------

--- a/imgui_demo.cpp
+++ b/imgui_demo.cpp
@ -1,4 +1,4 @@
-// dear imgui, v1.91.2 WIP
+// dear imgui, v1.91.3 WIP
 // (demo code)

 // Help:
@ -539,10 +539,30 @@ void ImGui::ShowDemoWindow(bool* p_open)
            ImGui::Checkbox("io.ConfigWindowsResizeFromEdges", &io.ConfigWindowsResizeFromEdges);
            ImGui::SameLine(); HelpMarker("Enable resizing of windows from their edges and from the lower-left corner.\nThis requires (io.BackendFlags & ImGuiBackendFlags_HasMouseCursors) because it needs mouse cursor feedback.");
            ImGui::Checkbox("io.ConfigWindowsMoveFromTitleBarOnly", &io.ConfigWindowsMoveFromTitleBarOnly);
+            ImGui::Checkbox("io.ConfigScrollbarScrollByPage", &io.ConfigScrollbarScrollByPage);
+            ImGui::SameLine(); HelpMarker("Enable scrolling page by page when clicking outside the scrollbar grab.\nWhen disabled, always scroll to clicked location.\nWhen enabled, Shift+Click scrolls to clicked location.");
            ImGui::Checkbox("io.ConfigMacOSXBehaviors", &io.ConfigMacOSXBehaviors);
            ImGui::SameLine(); HelpMarker("Swap Cmd<>Ctrl keys, enable various MacOS style behaviors.");
            ImGui::Text("Also see Style->Rendering for rendering options.");

+            // Also read: https://github.com/ocornut/imgui/wiki/Error-Handling
+            ImGui::SeparatorText("Error Handling");
+
+            ImGui::Checkbox("io.ConfigErrorRecovery", &io.ConfigErrorRecovery);
+            ImGui::SameLine(); HelpMarker(
+                "Options to configure how we handle recoverable errors.\n"
+                "- Error recovery is not perfect nor guaranteed! It is a feature to ease development.\n"
+                "- You not are not supposed to rely on it in the course of a normal application run.\n"
+                "- Possible usage: facilitate recovery from errors triggered from a scripting language or after specific exceptions handlers.\n"
+                "- Always ensure that on programmers seat you have at minimum Asserts or Tooltips enabled when making direct imgui API call!"
+                "Otherwise it would severely hinder your ability to catch and correct mistakes!");
+            ImGui::Checkbox("io.ConfigErrorRecoveryEnableAssert", &io.ConfigErrorRecoveryEnableAssert);
+            ImGui::Checkbox("io.ConfigErrorRecoveryEnableDebugLog", &io.ConfigErrorRecoveryEnableDebugLog);
+            ImGui::Checkbox("io.ConfigErrorRecoveryEnableTooltip", &io.ConfigErrorRecoveryEnableTooltip);
+            if (!io.ConfigErrorRecoveryEnableAssert && !io.ConfigErrorRecoveryEnableDebugLog && !io.ConfigErrorRecoveryEnableTooltip)
+                io.ConfigErrorRecoveryEnableAssert = io.ConfigErrorRecoveryEnableDebugLog = io.ConfigErrorRecoveryEnableTooltip = true;
+
+            // Also read: https://github.com/ocornut/imgui/wiki/Debug-Tools
            ImGui::SeparatorText("Debug");
            ImGui::Checkbox("io.ConfigDebugIsDebuggerPresent", &io.ConfigDebugIsDebuggerPresent);
            ImGui::SameLine(); HelpMarker("Enable various tools calling IM_DEBUG_BREAK().\n\nRequires a debugger being attached, otherwise IM_DEBUG_BREAK() options will appear to crash your application.");
@ -577,6 +597,7 @@ void ImGui::ShowDemoWindow(bool* p_open)
            ImGui::CheckboxFlags("io.BackendFlags: HasSetMousePos",       &io.BackendFlags, ImGuiBackendFlags_HasSetMousePos);
            ImGui::CheckboxFlags("io.BackendFlags: RendererHasVtxOffset", &io.BackendFlags, ImGuiBackendFlags_RendererHasVtxOffset);
            ImGui::EndDisabled();
+
            ImGui::TreePop();
            ImGui::Spacing();
        }
@ -3929,6 +3950,9 @@ static void ShowDemoWindowLayout()
        ImGui::SeparatorText("Manual-resize");
        {
            HelpMarker("Drag bottom border to resize. Double-click bottom border to auto-fit to vertical contents.");
+            //if (ImGui::Button("Set Height to 200"))
+            //    ImGui::SetNextWindowSize(ImVec2(-FLT_MIN, 200.0f));
+
            ImGui::PushStyleColor(ImGuiCol_ChildBg, ImGui::GetStyleColorVec4(ImGuiCol_FrameBg));
            if (ImGui::BeginChild("ResizableChild", ImVec2(-FLT_MIN, ImGui::GetTextLineHeightWithSpacing() * 8), ImGuiChildFlags_Borders | ImGuiChildFlags_ResizeY))
                for (int n = 0; n < 10; n++)
--- a/imgui_draw.cpp
+++ b/imgui_draw.cpp
@ -1,4 +1,4 @@
-// dear imgui, v1.91.2 WIP
+// dear imgui, v1.91.3 WIP
 // (drawing and font code)

 /*
--- a/imgui_internal.h
+++ b/imgui_internal.h
@ -1,4 +1,4 @@
-// dear imgui, v1.91.2 WIP
+// dear imgui, v1.91.3 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.
@ -28,6 +28,7 @@ Index of this file:
 // [SECTION] Viewport support
 // [SECTION] Settings support
 // [SECTION] Localization support
+// [SECTION] Error handling, State recovery support
 // [SECTION] Metrics, Debug tools
 // [SECTION] Generic context hooks
 // [SECTION] ImGuiContext (main imgui context)
@ -131,6 +132,7 @@ struct ImGuiContext;                // Main Dear ImGui context
 struct ImGuiContextHook;            // Hook for extensions like ImGuiTestEngine
 struct ImGuiDataVarInfo;            // Variable information (e.g. to access style variables from an enum)
 struct ImGuiDataTypeInfo;           // Type information associated to a ImGuiDataType enum
+struct ImGuiErrorRecoveryState;     // Storage of stack sizes for error handling and recovery
 struct ImGuiGroupData;              // Stacked storage data for BeginGroup()/EndGroup()
 struct ImGuiInputTextState;         // Internal state of the currently focused/edited text input box
 struct ImGuiInputTextDeactivateData;// Short term storage to backup text of a deactivating InputText() while another is stealing active id
@ -147,7 +149,6 @@ struct ImGuiOldColumnData;          // Storage data for a single column for lega
 struct ImGuiOldColumns;             // Storage data for a columns set for legacy Columns() api
 struct ImGuiPopupData;              // Storage for current popup stack
 struct ImGuiSettingsHandler;        // Storage for one type registered in the .ini file
-struct ImGuiStackSizes;             // Storage of stack sizes for debugging/asserting
 struct ImGuiStyleMod;               // Stacked style modifier, backup of modified data so we can restore it
 struct ImGuiTabBar;                 // Storage for a tab bar
 struct ImGuiTabItem;                // Storage for a tab item (within a tab bar)
@ -173,7 +174,7 @@ typedef int ImGuiLayoutType;            // -> enum ImGuiLayoutType_         // E
 // Flags
 typedef int ImGuiActivateFlags;         // -> enum ImGuiActivateFlags_      // Flags: for navigation/focus function (will be for ActivateItem() later)
 typedef int ImGuiDebugLogFlags;         // -> enum ImGuiDebugLogFlags_      // Flags: for ShowDebugLogWindow(), g.DebugLogFlags
-typedef int ImGuiFocusRequestFlags;     // -> enum ImGuiFocusRequestFlags_  // Flags: for FocusWindow();
+typedef int ImGuiFocusRequestFlags;     // -> enum ImGuiFocusRequestFlags_  // Flags: for FocusWindow()
 typedef int ImGuiItemStatusFlags;       // -> enum ImGuiItemStatusFlags_    // Flags: for g.LastItemData.StatusFlags
 typedef int ImGuiOldColumnFlags;        // -> enum ImGuiOldColumnFlags_     // Flags: for BeginColumns()
 typedef int ImGuiNavHighlightFlags;     // -> enum ImGuiNavHighlightFlags_  // Flags: for RenderNavHighlight()
@ -187,8 +188,6 @@ typedef int ImGuiTooltipFlags;          // -> enum ImGuiTooltipFlags_       // F
 typedef int ImGuiTypingSelectFlags;     // -> enum ImGuiTypingSelectFlags_  // Flags: for GetTypingSelectRequest()
 typedef int ImGuiWindowRefreshFlags;    // -> enum ImGuiWindowRefreshFlags_ // Flags: for SetNextWindowRefreshPolicy()

-typedef void (*ImGuiErrorLogCallback)(void* user_data, const char* fmt, ...);
-
 //-----------------------------------------------------------------------------
 // [SECTION] Context pointer
 // See implementation of this variable in imgui.cpp for comments and details.
@ -218,6 +217,7 @@ extern IMGUI_API ImGuiContext* GImGui;  // Current implicit context pointer
 #else
 #define IMGUI_DEBUG_LOG(...)            ((void)0)
 #endif
+#define IMGUI_DEBUG_LOG_ERROR(...)      do { ImGuiContext& g2 = *GImGui; if (g2.DebugLogFlags & ImGuiDebugLogFlags_EventError) IMGUI_DEBUG_LOG(__VA_ARGS__); else g2.DebugLogSkippedErrors++; } while (0)
 #define IMGUI_DEBUG_LOG_ACTIVEID(...)   do { if (g.DebugLogFlags & ImGuiDebugLogFlags_EventActiveId)    IMGUI_DEBUG_LOG(__VA_ARGS__); } while (0)
 #define IMGUI_DEBUG_LOG_FOCUS(...)      do { if (g.DebugLogFlags & ImGuiDebugLogFlags_EventFocus)       IMGUI_DEBUG_LOG(__VA_ARGS__); } while (0)
 #define IMGUI_DEBUG_LOG_POPUP(...)      do { if (g.DebugLogFlags & ImGuiDebugLogFlags_EventPopup)       IMGUI_DEBUG_LOG(__VA_ARGS__); } while (0)
@ -239,12 +239,6 @@ extern IMGUI_API ImGuiContext* GImGui;  // Current implicit context pointer
 #define IM_ASSERT_PARANOID(_EXPR)
 #endif

-// Error handling
-// Down the line in some frameworks/languages we would like to have a way to redirect those to the programmer and recover from more faults.
-#ifndef IM_ASSERT_USER_ERROR
-#define IM_ASSERT_USER_ERROR(_EXP,_MSG) IM_ASSERT((_EXP) && _MSG)   // Recoverable User Error
-#endif
-
 // Misc Macros
 #define IM_PI                           3.14159265358979323846f
 #ifdef _WIN32
@ -834,7 +828,7 @@ enum ImGuiDataTypePrivate_
 enum ImGuiItemFlagsPrivate_
 {
    // Controlled by user
-    ImGuiItemFlags_Disabled                 = 1 << 10, // false     // Disable interactions (DOES NOT affect visuals, see BeginDisabled()/EndDisabled() for full disable feature, and github #211).
+    ImGuiItemFlags_Disabled                 = 1 << 10, // false     // Disable interactions (DOES NOT affect visuals. DO NOT mix direct use of this with BeginDisabled(). See BeginDisabled()/EndDisabled() for full disable feature, and github #211).
    ImGuiItemFlags_ReadOnly                 = 1 << 11, // false     // [ALPHA] Allow hovering interactions but underlying value is not changed.
    ImGuiItemFlags_MixedValue               = 1 << 12, // false     // [BETA] Represent a mixed/indeterminate value, generally multi-selection where values differ. Currently only supported by Checkbox() (later should support all sorts of widgets)
    ImGuiItemFlags_NoWindowHoverableCheck   = 1 << 13, // false     // Disable hoverable check in ItemHoverable()
@ -1259,9 +1253,12 @@ struct ImGuiTreeNodeStackData
    ImRect                  NavRect;    // Used for nav landing
 };

-struct IMGUI_API ImGuiStackSizes
+// sizeof() = 20
+struct IMGUI_API ImGuiErrorRecoveryState
 {
+    short   SizeOfWindowStack;
    short   SizeOfIDStack;
+    short   SizeOfTreeStack;
    short   SizeOfColorStack;
    short   SizeOfStyleVarStack;
    short   SizeOfFontStack;
@ -1271,9 +1268,7 @@ struct IMGUI_API ImGuiStackSizes
    short   SizeOfBeginPopupStack;
    short   SizeOfDisabledStack;

-    ImGuiStackSizes() { memset(this, 0, sizeof(*this)); }
-    void SetToContextState(ImGuiContext* ctx);
-    void CompareWithContextState(ImGuiContext* ctx);
+    ImGuiErrorRecoveryState() { memset(this, 0, sizeof(*this)); }
 };

 // Data saved for each window pushed into the stack
@ -1281,7 +1276,7 @@ struct ImGuiWindowStackData
 {
    ImGuiWindow*            Window;
    ImGuiLastItemData       ParentLastItemDataBackup;
-    ImGuiStackSizes     StackSizesOnBegin;          // Store size of various stacks for asserting
+    ImGuiErrorRecoveryState StackSizesInBegin;          // Store size of various stacks for asserting
    bool                    DisabledOverrideReenable;   // Non-child window override disabled flag
 };

@ -1885,6 +1880,21 @@ struct ImGuiLocEntry
    const char*     Text;
 };

+//-----------------------------------------------------------------------------
+// [SECTION] Error handling, State recovery support
+//-----------------------------------------------------------------------------
+
+// Macros used by Recoverable Error handling
+// - Only dispatch error if _EXPR: evaluate as assert (similar to an assert macro).
+// - The message will always be a string literal, in order to increase likelihood of being display by an assert handler.
+// - See 'Demo->Configuration->Error Handling' and ImGuiIO definitions for details on error handling.
+// - Read https://github.com/ocornut/imgui/wiki/Error-Handling for details on error handling.
+#ifndef IM_ASSERT_USER_ERROR
+#define IM_ASSERT_USER_ERROR(_EXPR,_MSG)    do { if (!(_EXPR) && ImGui::ErrorLog(_MSG)) { IM_ASSERT((_EXPR) && _MSG); } } while (0)    // Recoverable User Error
+#endif
+
+// The error callback is currently not public, as it is expected that only advanced users will rely on it.
+typedef void (*ImGuiErrorCallback)(ImGuiContext* ctx, void* user_data, const char* msg); // Function signature for g.ErrorCallback

 //-----------------------------------------------------------------------------
 // [SECTION] Metrics, Debug Tools
@ -1894,16 +1904,19 @@ enum ImGuiDebugLogFlags_
 {
    // Event types
    ImGuiDebugLogFlags_None                 = 0,
-    ImGuiDebugLogFlags_EventActiveId        = 1 << 0,
-    ImGuiDebugLogFlags_EventFocus           = 1 << 1,
-    ImGuiDebugLogFlags_EventPopup           = 1 << 2,
-    ImGuiDebugLogFlags_EventNav             = 1 << 3,
-    ImGuiDebugLogFlags_EventClipper         = 1 << 4,
-    ImGuiDebugLogFlags_EventSelection       = 1 << 5,
-    ImGuiDebugLogFlags_EventIO              = 1 << 6,
-    ImGuiDebugLogFlags_EventInputRouting    = 1 << 7,
+    ImGuiDebugLogFlags_EventError           = 1 << 0,   // Error submitted by IM_ASSERT_USER_ERROR()
+    ImGuiDebugLogFlags_EventActiveId        = 1 << 1,
+    ImGuiDebugLogFlags_EventFocus           = 1 << 2,
+    ImGuiDebugLogFlags_EventPopup           = 1 << 3,
+    ImGuiDebugLogFlags_EventNav             = 1 << 4,
+    ImGuiDebugLogFlags_EventClipper         = 1 << 5,
+    ImGuiDebugLogFlags_EventSelection       = 1 << 6,
+    ImGuiDebugLogFlags_EventIO              = 1 << 7,
+    ImGuiDebugLogFlags_EventInputRouting    = 1 << 8,
+    ImGuiDebugLogFlags_EventDocking         = 1 << 9,   // Unused in this branch
+    ImGuiDebugLogFlags_EventViewport        = 1 << 10,  // Unused in this branch

-    ImGuiDebugLogFlags_EventMask_           = ImGuiDebugLogFlags_EventActiveId  | ImGuiDebugLogFlags_EventFocus | ImGuiDebugLogFlags_EventPopup | ImGuiDebugLogFlags_EventNav | ImGuiDebugLogFlags_EventClipper | ImGuiDebugLogFlags_EventSelection | ImGuiDebugLogFlags_EventIO | ImGuiDebugLogFlags_EventInputRouting,
+    ImGuiDebugLogFlags_EventMask_           = ImGuiDebugLogFlags_EventError | ImGuiDebugLogFlags_EventActiveId | ImGuiDebugLogFlags_EventFocus | ImGuiDebugLogFlags_EventPopup | ImGuiDebugLogFlags_EventNav | ImGuiDebugLogFlags_EventClipper | ImGuiDebugLogFlags_EventSelection | ImGuiDebugLogFlags_EventIO | ImGuiDebugLogFlags_EventInputRouting | ImGuiDebugLogFlags_EventDocking | ImGuiDebugLogFlags_EventViewport,
    ImGuiDebugLogFlags_OutputToTTY          = 1 << 20,  // Also send output to TTY
    ImGuiDebugLogFlags_OutputToTestEngine   = 1 << 21,  // Also send output to Test Engine
 };
@ -2258,8 +2271,8 @@ struct ImGuiContext
    ImGuiComboPreviewData   ComboPreviewData;
    ImRect                  WindowResizeBorderExpectedRect;     // Expected border rect, switch to relative edit if moving
    bool                    WindowResizeRelativeMode;
-    short                   ScrollbarSeekMode;                  // 0: relative, -1/+1: prev/next page.
-    float                   ScrollbarClickDeltaToGrabCenter;    // Distance between mouse and center of grab box, normalized in parent space. Use storage?
+    short                   ScrollbarSeekMode;                  // 0: scroll to clicked location, -1/+1: prev/next page.
+    float                   ScrollbarClickDeltaToGrabCenter;    // When scrolling to mouse location: distance between mouse and center of grab box, normalized in parent space.
    float                   SliderGrabClickOffset;
    float                   SliderCurrentAccum;                 // Accumulated slider delta when using navigation controls.
    bool                    SliderCurrentAccumDirty;            // Has the accumulated slider delta changed since last time we tried to apply it?
@ -2304,11 +2317,22 @@ struct ImGuiContext
    int                     LogDepthToExpand;
    int                     LogDepthToExpandDefault;            // Default/stored value for LogDepthMaxExpand if not specified in the LogXXX function call.

+    // Error Handling
+    ImGuiErrorCallback      ErrorCallback;                      // = NULL. May be exposed in public API eventually.
+    void*                   ErrorCallbackUserData;              // = NULL
+    ImVec2                  ErrorTooltipLockedPos;
+    bool                    ErrorFirst;
+    int                     ErrorCountCurrentFrame;             // [Internal] Number of errors submitted this frame.
+    ImGuiErrorRecoveryState StackSizesInNewFrame;               // [Internal]
+    ImGuiErrorRecoveryState*StackSizesInBeginForCurrentWindow;  // [Internal]
+
    // Debug Tools
    // (some of the highly frequently used data are interleaved in other structures above: DebugBreakXXX fields, DebugHookIdInfo, DebugLocateId etc.)
+    int                     DebugDrawIdConflictsCount;          // Locked count (preserved when holding CTRL)
    ImGuiDebugLogFlags      DebugLogFlags;
    ImGuiTextBuffer         DebugLogBuf;
    ImGuiTextIndex          DebugLogIndex;
+    int                     DebugLogSkippedErrors;
    ImGuiDebugLogFlags      DebugLogAutoDisableFlags;
    ImU8                    DebugLogAutoDisableFrames;
    ImU8                    DebugLocateFrames;                  // For DebugLocateItemOnHover(). This is used together with DebugLocateId which is in a hot/cached spot above.
@ -2335,210 +2359,7 @@ struct ImGuiContext
    ImVector<char>          TempBuffer;                         // Temporary text buffer
    char                    TempKeychordName[64];

-    ImGuiContext(ImFontAtlas* shared_font_atlas)
-    {
-        IO.Ctx = this;
-        InputTextState.Ctx = this;
-
-        Initialized = false;
-        FontAtlasOwnedByContext = shared_font_atlas ? false : true;
-        Font = NULL;
-        FontSize = FontBaseSize = FontScale = CurrentDpiScale = 0.0f;
-        IO.Fonts = shared_font_atlas ? shared_font_atlas : IM_NEW(ImFontAtlas)();
-        Time = 0.0f;
-        FrameCount = 0;
-        FrameCountEnded = FrameCountRendered = -1;
-        WithinFrameScope = WithinFrameScopeWithImplicitWindow = WithinEndChild = false;
-        GcCompactAll = false;
-        TestEngineHookItems = false;
-        TestEngine = NULL;
-        memset(ContextName, 0, sizeof(ContextName));
-
-        InputEventsNextMouseSource = ImGuiMouseSource_Mouse;
-        InputEventsNextEventId = 1;
-
-        WindowsActiveCount = 0;
-        CurrentWindow = NULL;
-        HoveredWindow = NULL;
-        HoveredWindowUnderMovingWindow = NULL;
-        HoveredWindowBeforeClear = NULL;
-        MovingWindow = NULL;
-        WheelingWindow = NULL;
-        WheelingWindowStartFrame = WheelingWindowScrolledFrame = -1;
-        WheelingWindowReleaseTimer = 0.0f;
-
-        DebugDrawIdConflicts = 0;
-        DebugHookIdInfo = 0;
-        HoveredId = HoveredIdPreviousFrame = 0;
-        HoveredIdPreviousFrameItemCount = 0;
-        HoveredIdAllowOverlap = false;
-        HoveredIdIsDisabled = false;
-        HoveredIdTimer = HoveredIdNotActiveTimer = 0.0f;
-        ItemUnclipByLog = false;
-        ActiveId = 0;
-        ActiveIdIsAlive = 0;
-        ActiveIdTimer = 0.0f;
-        ActiveIdIsJustActivated = false;
-        ActiveIdAllowOverlap = false;
-        ActiveIdNoClearOnFocusLoss = false;
-        ActiveIdHasBeenPressedBefore = false;
-        ActiveIdHasBeenEditedBefore = false;
-        ActiveIdHasBeenEditedThisFrame = false;
-        ActiveIdFromShortcut = false;
-        ActiveIdClickOffset = ImVec2(-1, -1);
-        ActiveIdWindow = NULL;
-        ActiveIdSource = ImGuiInputSource_None;
-        ActiveIdMouseButton = -1;
-        ActiveIdPreviousFrame = 0;
-        ActiveIdPreviousFrameIsAlive = false;
-        ActiveIdPreviousFrameHasBeenEditedBefore = false;
-        ActiveIdPreviousFrameWindow = NULL;
-        LastActiveId = 0;
-        LastActiveIdTimer = 0.0f;
-
-        LastKeyboardKeyPressTime = LastKeyModsChangeTime = LastKeyModsChangeFromNoneTime = -1.0;
-
-        ActiveIdUsingNavDirMask = 0x00;
-        ActiveIdUsingAllKeyboardKeys = false;
-
-        CurrentFocusScopeId = 0;
-        CurrentItemFlags = ImGuiItemFlags_None;
-        DebugShowGroupRects = false;
-
-        NavWindow = NULL;
-        NavId = NavFocusScopeId = NavActivateId = NavActivateDownId = NavActivatePressedId = 0;
-        NavLayer = ImGuiNavLayer_Main;
-        NavNextActivateId = 0;
-        NavActivateFlags = NavNextActivateFlags = ImGuiActivateFlags_None;
-        NavHighlightActivatedId = 0;
-        NavHighlightActivatedTimer = 0.0f;
-        NavInputSource = ImGuiInputSource_Keyboard;
-        NavLastValidSelectionUserData = ImGuiSelectionUserData_Invalid;
-        NavIdIsAlive = false;
-        NavMousePosDirty = false;
-        NavDisableHighlight = true;
-        NavDisableMouseHover = false;
-
-        NavAnyRequest = false;
-        NavInitRequest = false;
-        NavInitRequestFromMove = false;
-        NavMoveSubmitted = false;
-        NavMoveScoringItems = false;
-        NavMoveForwardToNextFrame = false;
-        NavMoveFlags = ImGuiNavMoveFlags_None;
-        NavMoveScrollFlags = ImGuiScrollFlags_None;
-        NavMoveKeyMods = ImGuiMod_None;
-        NavMoveDir = NavMoveDirForDebug = NavMoveClipDir = ImGuiDir_None;
-        NavScoringDebugCount = 0;
-        NavTabbingDir = 0;
-        NavTabbingCounter = 0;
-
-        NavJustMovedFromFocusScopeId = NavJustMovedToId = NavJustMovedToFocusScopeId = 0;
-        NavJustMovedToKeyMods = ImGuiMod_None;
-        NavJustMovedToIsTabbing = false;
-        NavJustMovedToHasSelectionData = false;
-
-        // All platforms use Ctrl+Tab but Ctrl<>Super are swapped on Mac...
-        // FIXME: Because this value is stored, it annoyingly interfere with toggling io.ConfigMacOSXBehaviors updating this..
-        ConfigNavWindowingKeyNext = IO.ConfigMacOSXBehaviors ? (ImGuiMod_Super | ImGuiKey_Tab) : (ImGuiMod_Ctrl | ImGuiKey_Tab);
-        ConfigNavWindowingKeyPrev = IO.ConfigMacOSXBehaviors ? (ImGuiMod_Super | ImGuiMod_Shift | ImGuiKey_Tab) : (ImGuiMod_Ctrl | ImGuiMod_Shift | ImGuiKey_Tab);
-        NavWindowingTarget = NavWindowingTargetAnim = NavWindowingListWindow = NULL;
-        NavWindowingTimer = NavWindowingHighlightAlpha = 0.0f;
-        NavWindowingToggleLayer = false;
-        NavWindowingToggleKey = ImGuiKey_None;
-
-        DimBgRatio = 0.0f;
-
-        DragDropActive = DragDropWithinSource = DragDropWithinTarget = false;
-        DragDropSourceFlags = ImGuiDragDropFlags_None;
-        DragDropSourceFrameCount = -1;
-        DragDropMouseButton = -1;
-        DragDropTargetId = 0;
-        DragDropAcceptFlags = ImGuiDragDropFlags_None;
-        DragDropAcceptIdCurrRectSurface = 0.0f;
-        DragDropAcceptIdPrev = DragDropAcceptIdCurr = 0;
-        DragDropAcceptFrameCount = -1;
-        DragDropHoldJustPressedId = 0;
-        memset(DragDropPayloadBufLocal, 0, sizeof(DragDropPayloadBufLocal));
-
-        ClipperTempDataStacked = 0;
-
-        CurrentTable = NULL;
-        TablesTempDataStacked = 0;
-        CurrentTabBar = NULL;
-        CurrentMultiSelect = NULL;
-        MultiSelectTempDataStacked = 0;
-
-        HoverItemDelayId = HoverItemDelayIdPreviousFrame = HoverItemUnlockedStationaryId = HoverWindowUnlockedStationaryId = 0;
-        HoverItemDelayTimer = HoverItemDelayClearTimer = 0.0f;
-
-        MouseCursor = ImGuiMouseCursor_Arrow;
-        MouseStationaryTimer = 0.0f;
-
-        TempInputId = 0;
-        memset(&DataTypeZeroValue, 0, sizeof(DataTypeZeroValue));
-        BeginMenuDepth = BeginComboDepth = 0;
-        ColorEditOptions = ImGuiColorEditFlags_DefaultOptions_;
-        ColorEditCurrentID = ColorEditSavedID = 0;
-        ColorEditSavedHue = ColorEditSavedSat = 0.0f;
-        ColorEditSavedColor = 0;
-        WindowResizeRelativeMode = false;
-        ScrollbarSeekMode = 0;
-        ScrollbarClickDeltaToGrabCenter = 0.0f;
-        SliderGrabClickOffset = 0.0f;
-        SliderCurrentAccum = 0.0f;
-        SliderCurrentAccumDirty = false;
-        DragCurrentAccumDirty = false;
-        DragCurrentAccum = 0.0f;
-        DragSpeedDefaultRatio = 1.0f / 100.0f;
-        DisabledAlphaBackup = 0.0f;
-        DisabledStackSize = 0;
-        LockMarkEdited = 0;
-        TooltipOverrideCount = 0;
-
-        PlatformImeData.InputPos = ImVec2(0.0f, 0.0f);
-        PlatformImeDataPrev.InputPos = ImVec2(-1.0f, -1.0f); // Different to ensure initial submission
-
-        SettingsLoaded = false;
-        SettingsDirtyTimer = 0.0f;
-        HookIdNext = 0;
-
-        memset(LocalizationTable, 0, sizeof(LocalizationTable));
-
-        LogEnabled = false;
-        LogType = ImGuiLogType_None;
-        LogNextPrefix = LogNextSuffix = NULL;
-        LogFile = NULL;
-        LogLinePosY = FLT_MAX;
-        LogLineFirstItem = false;
-        LogDepthRef = 0;
-        LogDepthToExpand = LogDepthToExpandDefault = 2;
-
-        DebugLogFlags = ImGuiDebugLogFlags_OutputToTTY;
-        DebugLocateId = 0;
-        DebugLogAutoDisableFlags = ImGuiDebugLogFlags_None;
-        DebugLogAutoDisableFrames = 0;
-        DebugLocateFrames = 0;
-        DebugBeginReturnValueCullDepth = -1;
-        DebugItemPickerActive = false;
-        DebugItemPickerMouseButton = ImGuiMouseButton_Left;
-        DebugItemPickerBreakId = 0;
-        DebugFlashStyleColorTime = 0.0f;
-        DebugFlashStyleColorIdx = ImGuiCol_COUNT;
-
-        // Same as DebugBreakClearData(). Those fields are scattered in their respective subsystem to stay in hot-data locations
-        DebugBreakInWindow = 0;
-        DebugBreakInTable = 0;
-        DebugBreakInLocateId = false;
-        DebugBreakKeyChord = ImGuiKey_Pause;
-        DebugBreakInShortcutRouting = ImGuiKey_None;
-
-        memset(FramerateSecPerFrame, 0, sizeof(FramerateSecPerFrame));
-        FramerateSecPerFrameIdx = FramerateSecPerFrameCount = 0;
-        FramerateSecPerFrameAccum = 0.0f;
-        WantCaptureMouseNextFrame = WantCaptureKeyboardNextFrame = WantTextInputNextFrame = -1;
-        memset(TempKeychordName, 0, sizeof(TempKeychordName));
-    }
+    ImGuiContext(ImFontAtlas* shared_font_atlas);
 };

 //-----------------------------------------------------------------------------
@ -2761,9 +2582,10 @@ struct ImGuiTabItem
    ImGuiTabItem()      { memset(this, 0, sizeof(*this)); LastFrameVisible = LastFrameSelected = -1; RequestedWidth = -1.0f; NameOffset = -1; BeginOrder = IndexDuringLayout = -1; }
 };

-// Storage for a tab bar (sizeof() 152 bytes)
+// Storage for a tab bar (sizeof() 160 bytes)
 struct IMGUI_API ImGuiTabBar
 {
+    ImGuiWindow*        Window;
    ImVector<ImGuiTabItem> Tabs;
    ImGuiTabBarFlags    Flags;
    ImGuiID             ID;                     // Zero for tab-bars used by docking
@ -3606,11 +3428,18 @@ namespace ImGui
    IMGUI_API void          GcCompactTransientWindowBuffers(ImGuiWindow* window);
    IMGUI_API void          GcAwakeTransientWindowBuffers(ImGuiWindow* window);

+    // Error handling, State Recovery
+    IMGUI_API bool          ErrorLog(const char* msg);
+    IMGUI_API void          ErrorRecoveryStoreState(ImGuiErrorRecoveryState* state_out);
+    IMGUI_API void          ErrorRecoveryTryToRecoverState(const ImGuiErrorRecoveryState* state_in);
+    IMGUI_API void          ErrorRecoveryTryToRecoverWindowState(const ImGuiErrorRecoveryState* state_in);
+    IMGUI_API void          ErrorCheckUsingSetCursorPosToExtendParentBoundaries();
+    IMGUI_API void          ErrorCheckEndFrameFinalizeErrorTooltip();
+    IMGUI_API bool          BeginErrorTooltip();
+    IMGUI_API void          EndErrorTooltip();
+
    // Debug Tools
    IMGUI_API void          DebugAllocHook(ImGuiDebugAllocInfo* info, int frame_count, void* ptr, size_t size); // size >= 0 : alloc, size = -1 : free
-    IMGUI_API void          ErrorCheckEndFrameRecover(ImGuiErrorLogCallback log_callback, void* user_data = NULL);
-    IMGUI_API void          ErrorCheckEndWindowRecover(ImGuiErrorLogCallback log_callback, void* user_data = NULL);
-    IMGUI_API void          ErrorCheckUsingSetCursorPosToExtendParentBoundaries();
    IMGUI_API void          DebugDrawCursorPos(ImU32 col = IM_COL32(255, 0, 0, 255));
    IMGUI_API void          DebugDrawLineExtents(ImU32 col = IM_COL32(255, 0, 0, 255));
    IMGUI_API void          DebugDrawItemRect(ImU32 col = IM_COL32(255, 0, 0, 255));
@ -3698,7 +3527,7 @@ extern const char*  ImGuiTestEngine_FindItemDebugLabel(ImGuiContext* ctx, ImGuiI
 // In IMGUI_VERSION_NUM >= 18934: changed IMGUI_TEST_ENGINE_ITEM_ADD(bb,id) to IMGUI_TEST_ENGINE_ITEM_ADD(id,bb,item_data);
 #define IMGUI_TEST_ENGINE_ITEM_ADD(_ID,_BB,_ITEM_DATA)      if (g.TestEngineHookItems) ImGuiTestEngineHook_ItemAdd(&g, _ID, _BB, _ITEM_DATA)    // Register item bounding box
 #define IMGUI_TEST_ENGINE_ITEM_INFO(_ID,_LABEL,_FLAGS)      if (g.TestEngineHookItems) ImGuiTestEngineHook_ItemInfo(&g, _ID, _LABEL, _FLAGS)    // Register item label and status flags (optional)
-#define IMGUI_TEST_ENGINE_LOG(_FMT,...)                     if (g.TestEngineHookItems) ImGuiTestEngineHook_Log(&g, _FMT, __VA_ARGS__)           // Custom log entry from user land into test log
+#define IMGUI_TEST_ENGINE_LOG(_FMT,...)                     ImGuiTestEngineHook_Log(&g, _FMT, __VA_ARGS__)                                      // Custom log entry from user land into test log
 #else
 #define IMGUI_TEST_ENGINE_ITEM_ADD(_BB,_ID)                 ((void)0)
 #define IMGUI_TEST_ENGINE_ITEM_INFO(_ID,_LABEL,_FLAGS)      ((void)g)
--- a/imgui_tables.cpp
+++ b/imgui_tables.cpp
@ -1,4 +1,4 @@
-// dear imgui, v1.91.2 WIP
+// dear imgui, v1.91.3 WIP
 // (tables and columns code)

 /*
@ -1484,7 +1484,9 @@ void    ImGui::EndTable()
    {
        short backup_nav_layers_active_mask = inner_window->DC.NavLayersActiveMask;
        inner_window->DC.NavLayersActiveMask |= 1 << ImGuiNavLayer_Main; // So empty table don't appear to navigate differently.
+        g.CurrentTable = NULL; // To avoid error recovery recursing
        EndChild();
+        g.CurrentTable = table;
        inner_window->DC.NavLayersActiveMask = backup_nav_layers_active_mask;
    }
    else
--- a/imgui_widgets.cpp
+++ b/imgui_widgets.cpp
@ -1,4 +1,4 @@
-// dear imgui, v1.91.2 WIP
+// dear imgui, v1.91.3 WIP
 // (widgets code)

 /*
@ -999,9 +999,10 @@ bool ImGui::ScrollbarEx(const ImRect& bb_frame, ImGuiID id, ImGuiAxis axis, ImS6
        const int held_dir = (clicked_v_norm < grab_v_norm) ? -1 : (clicked_v_norm > grab_v_norm + grab_h_norm) ? +1 : 0;
        if (g.ActiveIdIsJustActivated)
        {
-            // On initial click calculate the distance between mouse and the center of the grab
-            g.ScrollbarSeekMode = (short)held_dir;
-            g.ScrollbarClickDeltaToGrabCenter = (g.ScrollbarSeekMode == 0.0f) ? clicked_v_norm - grab_v_norm - grab_h_norm * 0.5f : 0.0f;
+            // On initial click when held_dir == 0 (clicked over grab): calculate the distance between mouse and the center of the grab
+            const bool scroll_to_clicked_location = (g.IO.ConfigScrollbarScrollByPage == false || g.IO.KeyShift || held_dir == 0);
+            g.ScrollbarSeekMode = scroll_to_clicked_location ? 0 : (short)held_dir;
+            g.ScrollbarClickDeltaToGrabCenter = (held_dir == 0 && !g.IO.KeyShift) ? clicked_v_norm - grab_v_norm - grab_h_norm * 0.5f : 0.0f;
        }

        // Apply scroll (p_scroll_v will generally point on one member of window->Scroll)
@ -7390,6 +7391,7 @@ void ImGui::EndBoxSelect(const ImRect& scope_rect, ImGuiMultiSelectFlags ms_flag
 static void DebugLogMultiSelectRequests(const char* function, const ImGuiMultiSelectIO* io)
 {
    ImGuiContext& g = *GImGui;
+    IM_UNUSED(function);
    for (const ImGuiSelectionRequest& req : io->Requests)
    {
        if (req.Type == ImGuiSelectionRequestType_SetAll)    IMGUI_DEBUG_LOG_SELECTION("[selection] %s: Request: SetAll %d (= %s)\n", function, req.Selected, req.Selected ? "SelectAll" : "Clear");
@ -7549,7 +7551,7 @@ ImGuiMultiSelectIO* ImGui::EndMultiSelect()
    ImGuiMultiSelectTempData* ms = g.CurrentMultiSelect;
    ImGuiMultiSelectState* storage = ms->Storage;
    ImGuiWindow* window = g.CurrentWindow;
-    IM_ASSERT(ms->FocusScopeId == g.CurrentFocusScopeId);
+    IM_ASSERT_USER_ERROR(ms->FocusScopeId == g.CurrentFocusScopeId, "EndMultiSelect() FocusScope mismatch!");
    IM_ASSERT(g.CurrentMultiSelect != NULL && storage->Window == g.CurrentWindow);
    IM_ASSERT(g.MultiSelectTempDataStacked > 0 && &g.MultiSelectTempData[g.MultiSelectTempDataStacked - 1] == g.CurrentMultiSelect);

@ -8156,6 +8158,13 @@ void ImGuiSelectionExternalStorage::ApplyRequests(ImGuiMultiSelectIO* ms_io)
 //-------------------------------------------------------------------------

 // This is essentially a thin wrapper to using BeginChild/EndChild with the ImGuiChildFlags_FrameStyle flag for stylistic changes + displaying a label.
+// This handle some subtleties with capturing info from the label, but for 99% uses it could essentially be rewritten as:
+//    if (ImGui::BeginChild("...", ImVec2(ImGui::CalcItemWidth(), ImGui::GetTextLineHeight() * 7.5f), ImGuiChildFlags_FrameStyle))
+//        { .... }
+//    ImGui::EndChild();
+//    ImGui::SameLine();
+//    ImGui::AlignTextToFramePadding();
+//    ImGui::Text("Label");
 // Tip: To have a list filling the entire window width, use size.x = -FLT_MIN and pass an non-visible label e.g. "##empty"
 // Tip: If your vertical size is calculated from an item count (e.g. 10 * item_height) consider adding a fractional part to facilitate seeing scrolling boundaries (e.g. 10.25 * item_height).
 bool ImGui::BeginListBox(const char* label, const ImVec2& size_arg)
@ -9145,6 +9154,7 @@ bool    ImGui::BeginTabBarEx(ImGuiTabBar* tab_bar, const ImRect& tab_bar_bb, ImG
    // Add to stack
    g.CurrentTabBarStack.push_back(GetTabBarRefFromTabBar(tab_bar));
    g.CurrentTabBar = tab_bar;
+    tab_bar->Window = window;

    // Append with multiple BeginTabBar()/EndTabBar() pairs.
    tab_bar->BackupCursorPos = window->DC.CursorPos;