Merge branch 'master' into docking

# Conflicts:
#	backends/imgui_impl_glfw.cpp
#	docs/CHANGELOG.txt
#	imgui.cpp

backends/imgui_impl_glfw.cpp

@@ -22,6 +22,7 @@
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
 //  2023-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
+//  2023-06-12: Accept glfwGetTime() not returning a monotonically increasing value. This seems to happens on some Windows setup when peripherals disconnect, and is likely to also happen on browser + Emscripten. (#6491)
 //  2023-04-04: Inputs: Added support for io.AddMouseSourceEvent() to discriminate ImGuiMouseSource_Mouse/ImGuiMouseSource_TouchScreen/ImGuiMouseSource_Pen on Windows ONLY, using a custom WndProc hook. (#2702)
 //  2023-03-16: Inputs: Fixed key modifiers handling on secondary viewports (docking branch). Broken on 2023/01/04. (#6248, #6034)
 //  2023-03-14: Emscripten: Avoid using glfwGetError() and glfwGetGamepadState() which are not correctly implemented in Emscripten emulation. (#6240)
@@ -937,7 +938,10 @@ void ImGui_ImplGlfw_NewFrame()
         ImGui_ImplGlfw_UpdateMonitors();
 
     // Setup time step
+    // (Accept glfwGetTime() not returning a monotonically increasing value. Seems to happens on disconnecting peripherals and probably on VMs and Emscripten, see #6491, #6189, #6114, #3644)
     double current_time = glfwGetTime();
+    if (current_time <= bd->Time)
+        current_time = bd->Time + 0.00001f;
     io.DeltaTime = bd->Time > 0.0 ? (float)(current_time - bd->Time) : (float)(1.0f / 60.0f);
     bd->Time = current_time;
 

backends/imgui_impl_opengl3.cpp

@@ -289,7 +289,12 @@ bool    ImGui_ImplOpenGL3_Init(const char* glsl_version)
     io.BackendRendererName = "imgui_impl_opengl3";
 
     // Query for GL version (e.g. 320 for GL 3.2)
-#if !defined(IMGUI_IMPL_OPENGL_ES2)
+#if defined(IMGUI_IMPL_OPENGL_ES2)
+    // GLES 2
+    bd->GlVersion = 200;
+    bd->GlProfileIsES2 = true;
+#else
+    // Desktop or GLES 3
     GLint major = 0;
     GLint minor = 0;
     glGetIntegerv(GL_MAJOR_VERSION, &major);
@@ -306,6 +311,10 @@ bool    ImGui_ImplOpenGL3_Init(const char* glsl_version)
     bd->GlProfileIsCompat = (bd->GlProfileMask & GL_CONTEXT_COMPATIBILITY_PROFILE_BIT) != 0;
 #endif
 
+#if defined(IMGUI_IMPL_OPENGL_ES3)
+    bd->GlProfileIsES3 = true;
+#endif
+
     bd->UseBufferSubData = false;
     /*
     // Query vendor to enable glBufferSubData kludge
@@ -315,16 +324,10 @@ bool    ImGui_ImplOpenGL3_Init(const char* glsl_version)
             bd->UseBufferSubData = true;
 #endif
     */
-#elif defined(IMGUI_IMPL_OPENGL_ES2)
-    bd->GlVersion = 200; // GLES 2
-    bd->GlProfileIsES2 = true;
-#elif defined(IMGUI_IMPL_OPENGL_ES3)
-    bd->GlVersion = 200; // Don't raise version as it is intended as a desktop version check for now.
-    bd->GlProfileIsES3 = true;
 #endif
 
 #ifdef IMGUI_IMPL_OPENGL_DEBUG
-    printf("GL_MAJOR_VERSION = %d\nGL_MINOR_VERSION = %d\nGL_VENDOR = '%s'\nGL_RENDERER = '%s'\n", major, minor, (const char*)glGetString(GL_VENDOR), (const char*)glGetString(GL_RENDERER)); // [DEBUG]
+    printf("GlVersion = %d\nGlProfileIsCompat = %d\nGlProfileMask = 0x%X\nGlProfileIsES2 = %d, GlProfileIsES3 = %d\nGL_VENDOR = '%s'\nGL_RENDERER = '%s'\n", bd->GlVersion, bd->GlProfileIsCompat, bd->GlProfileMask, bd->GlProfileIsES2, bd->GlProfileIsES3, (const char*)glGetString(GL_VENDOR), (const char*)glGetString(GL_RENDERER)); // [DEBUG]
 #endif
 
 #ifdef IMGUI_IMPL_OPENGL_MAY_HAVE_VTX_OFFSET

docs/CHANGELOG.txt

@@ -101,12 +101,53 @@ Other changes:
  VERSION 1.89.7 WIP (In Progress)
 -----------------------------------------------------------------------
 
+Breaking changes:
+
+- Moved io.HoverDelayShort/io.HoverDelayNormal to style.HoverDelayShort/style.HoverDelayNormal.
+  As the fields were added in 1.89 and expected to be left unchanged by most users, or only
+  tweaked once during app initialisation, we are exceptionally accepting the breakage.
+  Majority of users should not even notice.
+
 Other changes:
 
+- Tooltips/IsItemHovered() related changes:
+  - IsItemHovered: Added ImGuiHoveredFlags_Stationary to require mouse being
+    stationary when hovering a new item. Added style.HoverStationaryDelay (~0.15 sec).
+    Once the mouse has been stationary once the state is preserved for same item. (#1485)
+  - IsItemHovered: Added ImGuiHoveredFlags_ForTooltip as a shortcut for pulling flags
+    from style.HoverFlagsForTooltipMouse or style.HoverFlagsForTooltipNav. (#1485)
+    - style.HoverFlagsForTooltipMouse defaults to ImGuiHoveredFlags_Stationary | ImGuiHoveredFlags_DelayShort
+    - style.HoverFlagsForTooltipNav defaults to ImGuiHoveredFlags_NoSharedDelay | ImGuiHoveredFlags_DelayNormal
+  - Tooltips: Added SetItemTooltip() and BeginItemTooltip() functions.
+    They are shortcuts for the common idiom of using IsItemHovered().
+    - SetItemTooltip("Hello")   == if (IsItemHovered(ImGuiHoveredFlags_Tooltip)) { SetTooltip("Hello"); }
+    - BeginItemTooltip()        == IsItemHovered(ImGuiHoveredFlags_Tooltip) && BeginTooltip()
+    The newly added ImGuiHoveredFlags_Tooltip is meant to standardize mouse hovering
+    delays and rules for a whole application.
+    The previously common idiom of using 'if (IsItemHovered()) { SetTooltip(...); }' won't
+    use delay or stationary test.
+  - Tooltips: Tweak default offset for non-drag and drop tooltips so underlying items
+    isn't covered as much. (Match offset for drag and drop tooltips)
+  - IsItemHovered: Tweaked default value of style.HoverDelayNormal from 0.30 to 0.40,
+    Tweaked default value of style.HoverDelayShort from 0.10 to 0.15. (#1485)
+- IsWindowHovered: Added support for ImGuiHoveredFlags_Stationary.
+- IsWindowHovered, IsItemHovered: Assert when passed any unsupported flags.
 - Tables: Fixed a regression in 1.89.6 leading to the first column of tables with either
   ScrollX or ScrollY flags from being impossible to resize. (#6503)
+- Clipper: Rework inner logic to allow functioning with a zero-clear constructor.
+  This is order to facilitate usage for language bindings (e.g cimgui or dear_binding)
+  where user may not be callinga constructor manually. (#5856)
+- Modals: In the case of nested modal, made sure that focused or appearing windows are
+  moved below the lowest blocking modal (rather than the highest one). (#4317)
 - Debug Tools: Added 'io.ConfigDebugIniSettings' option to save .ini data with extra
   comments. Currently mainly for inspecting Docking .ini data, but makes saving slower.
+- Demo: Added more developed "Widgets->Tooltips" section. (#1485)
+- Backends: OpenGL3: Fixed support for glBindSampler() backup/restore on ES3. (#6375, #6508) [@jsm174]
+- Backends: GLFW: Accept glfwGetTime() not returning a monotonically increasing value.
+  This seems to happens on some Windows setup when peripherals disconnect, and is likely
+  to also happen on browser+Emscripten. Matches similar 1.89.4 fix in SDL backend. (#6491)
+- Examples: Win32+OpenGL3: Changed DefWindowProc() to DefWindowProcW() to match other examples
+  and support the example app being compiled without UNICODE. (#6516, #5725, #5961, #5975) [@yenixing]
 
 Docking+Viewports Branch:
 
@@ -662,7 +703,7 @@ Other Changes:
 - ColorEdit3: fixed id collision leading to an assertion. (#5707)
 - IsItemHovered: Added ImGuiHoveredFlags_DelayNormal and ImGuiHoveredFlags_DelayShort flags,
   allowing to introduce a shared delay for tooltip idioms. The delays are respectively
-  io.HoverDelayNormal (default to 0.30f) and io.HoverDelayFast (default to 0.10f). (#1485)
+  io.HoverDelayNormal (default to 0.30f) and io.HoverDelayShort (default to 0.10f). (#1485)
 - IsItemHovered: Added ImGuiHoveredFlags_NoSharedDelay to disable sharing delays between items,
   so moving from one item to a nearby one will requires delay to elapse again. (#1485)
 - Tables: activating an ID (e.g. clicking button inside) column doesn't prevent columns

examples/example_win32_opengl3/main.cpp

@@ -300,5 +300,5 @@ LRESULT WINAPI WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
         ::PostQuitMessage(0);
         return 0;
     }
-    return ::DefWindowProc(hWnd, msg, wParam, lParam);
+    return ::DefWindowProcW(hWnd, msg, wParam, lParam);
 }

imgui.cpp

@@ -405,6 +405,7 @@ CODE
                           - likewise io.MousePos and GetMousePos() will use OS coordinates.
                             If you query mouse positions to interact with non-imgui coordinates you will need to offset them, e.g. subtract GetWindowViewport()->Pos.
 
+ - 2023/06/20 (1.89.7) - moved io.HoverDelayShort/io.HoverDelayNormal to style.HoverDelayShort/style.HoverDelayNormal. As the fields were added in 1.89 and expected to be left unchanged by most users, or only tweaked once during app initialization, we are exceptionally accepting the breakage.
  - 2023/05/30 (1.89.6) - backends: renamed "imgui_impl_sdlrenderer.cpp" to "imgui_impl_sdlrenderer2.cpp" and "imgui_impl_sdlrenderer.h" to "imgui_impl_sdlrenderer2.h". This is in prevision for the future release of SDL3.
  - 2023/05/22 (1.89.6) - listbox: commented out obsolete/redirecting functions that were marked obsolete more than two years ago:
                            - ListBoxHeader()  -> use BeginListBox() (note how two variants of ListBoxHeader() existed. Check commented versions in imgui.h for reference)
@@ -1001,6 +1002,9 @@ static const float WINDOWS_HOVER_PADDING                    = 4.0f;     // Exten
 static const float WINDOWS_RESIZE_FROM_EDGES_FEEDBACK_TIMER = 0.04f;    // Reduce visual noise by only highlighting the border after a certain time.
 static const float WINDOWS_MOUSE_WHEEL_SCROLL_LOCK_TIMER    = 0.70f;    // Lock scrolled window (so it doesn't pick child windows that are scrolling through) for a certain time, unless mouse moved.
 
+// Tooltip offset
+static const ImVec2 TOOLTIP_DEFAULT_OFFSET = ImVec2(16, 10);            // Multiplied by g.Style.MouseCursorScale
+
 // Docking
 static const float DOCKING_TRANSPARENT_PAYLOAD_ALPHA        = 0.50f;    // For use with io.ConfigDockingTransparentPayload. Apply to Viewport _or_ WindowBg in host viewport.
 static const float DOCKING_SPLITTER_SIZE                    = 2.0f;
@@ -1183,6 +1187,13 @@ ImGuiStyle::ImGuiStyle()
     CurveTessellationTol    = 1.25f;            // Tessellation tolerance when using PathBezierCurveTo() without a specific number of segments. Decrease for highly tessellated curves (higher quality, more polygons), increase to reduce quality.
     CircleTessellationMaxError = 0.30f;         // Maximum error (in pixels) allowed when using AddCircle()/AddCircleFilled() or drawing rounded corner rectangles with no explicit segment count specified. Decrease for higher quality but more geometry.
 
+    // Behaviors
+    HoverStationaryDelay    = 0.15f;            // Delay for IsItemHovered(ImGuiHoveredFlags_Stationary). Time required to consider mouse stationary.
+    HoverDelayShort         = 0.15f;            // Delay for IsItemHovered(ImGuiHoveredFlags_DelayShort). Usually used along with HoverStationaryDelay.
+    HoverDelayNormal        = 0.40f;            // Delay for IsItemHovered(ImGuiHoveredFlags_DelayNormal). "
+    HoverFlagsForTooltipMouse = ImGuiHoveredFlags_Stationary | ImGuiHoveredFlags_DelayShort;    // Default flags when using IsItemHovered(ImGuiHoveredFlags_ForTooltip) or BeginItemTooltip()/SetItemTooltip() while using mouse.
+    HoverFlagsForTooltipNav = ImGuiHoveredFlags_NoSharedDelay | ImGuiHoveredFlags_DelayNormal;  // Default flags when using IsItemHovered(ImGuiHoveredFlags_ForTooltip) or BeginItemTooltip()/SetItemTooltip() while using keyboard/gamepad.
+
     // Default theme
     ImGui::StyleColorsDark(this);
 }
@@ -1231,16 +1242,10 @@ ImGuiIO::ImGuiIO()
     IniSavingRate = 5.0f;
     IniFilename = "imgui.ini"; // Important: "imgui.ini" is relative to current working dir, most apps will want to lock this to an absolute path (e.g. same path as executables).
     LogFilename = "imgui_log.txt";
-    MouseDoubleClickTime = 0.30f;
-    MouseDoubleClickMaxDist = 6.0f;
 #ifndef IMGUI_DISABLE_OBSOLETE_KEYIO
     for (int i = 0; i < ImGuiKey_COUNT; i++)
         KeyMap[i] = -1;
 #endif
-    KeyRepeatDelay = 0.275f;
-    KeyRepeatRate = 0.050f;
-    HoverDelayNormal = 0.30f;
-    HoverDelayShort = 0.10f;
     UserData = NULL;
 
     Fonts = NULL;
@@ -1278,6 +1283,13 @@ ImGuiIO::ImGuiIO()
     ConfigDebugBeginReturnValueOnce = false;
     ConfigDebugBeginReturnValueLoop = false;
 
+    // Inputs Behaviors
+    MouseDoubleClickTime = 0.30f;
+    MouseDoubleClickMaxDist = 6.0f;
+    MouseDragThreshold = 6.0f;
+    KeyRepeatDelay = 0.275f;
+    KeyRepeatRate = 0.050f;
+
     // Platform Functions
     // Note: Initialize() will setup default clipboard/ime handlers.
     BackendPlatformName = BackendRendererName = NULL;
@@ -1287,7 +1299,6 @@ ImGuiIO::ImGuiIO()
     MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
     MousePosPrev = ImVec2(-FLT_MAX, -FLT_MAX);
     MouseSource = ImGuiMouseSource_Mouse;
-    MouseDragThreshold = 6.0f;
     for (int i = 0; i < IM_ARRAYSIZE(MouseDownDuration); i++) MouseDownDuration[i] = MouseDownDurationPrev[i] = -1.0f;
     for (int i = 0; i < IM_ARRAYSIZE(KeysData); i++) { KeysData[i].DownDuration = KeysData[i].DownDurationPrev = -1.0f; }
     AppAcceptingEvents = true;
@@ -2807,9 +2818,6 @@ static void ImGuiListClipper_SeekCursorForItem(ImGuiListClipper* clipper, int it
 ImGuiListClipper::ImGuiListClipper()
 {
     memset(this, 0, sizeof(*this));
-    Ctx = ImGui::GetCurrentContext();
-    IM_ASSERT(Ctx != NULL);
-    ItemsCount = -1;
 }
 
 ImGuiListClipper::~ImGuiListClipper()
@@ -2819,6 +2827,9 @@ ImGuiListClipper::~ImGuiListClipper()
 
 void ImGuiListClipper::Begin(int items_count, float items_height)
 {
+    if (Ctx == NULL)
+        Ctx = ImGui::GetCurrentContext();
+
     ImGuiContext& g = *Ctx;
     ImGuiWindow* window = g.CurrentWindow;
     IMGUI_DEBUG_LOG_CLIPPER("Clipper: Begin(%d,%.2f) in '%s'\n", items_count, items_height, window->Name);
@@ -2844,10 +2855,10 @@ void ImGuiListClipper::Begin(int items_count, float items_height)
 
 void ImGuiListClipper::End()
 {
-    ImGuiContext& g = *Ctx;
     if (ImGuiListClipperData* data = (ImGuiListClipperData*)TempData)
     {
         // In theory here we should assert that we are already at the right position, but it seems saner to just seek at the end and not assert/crash the user.
+        ImGuiContext& g = *Ctx;
         IMGUI_DEBUG_LOG_CLIPPER("Clipper: End() in '%s'\n", g.CurrentWindow->Name);
         if (ItemsCount >= 0 && ItemsCount < INT_MAX && DisplayStart >= 0)
             ImGuiListClipper_SeekCursorForItem(this, ItemsCount);
@@ -3573,6 +3584,7 @@ void ImGui::DestroyContext(ImGuiContext* ctx)
 // IMPORTANT: ###xxx suffixes must be same in ALL languages
 static const ImGuiLocEntry GLocalizationEntriesEnUS[] =
 {
+    { ImGuiLocKey_VersionStr,           "Dear ImGui " IMGUI_VERSION " (" IM_STRINGIFY(IMGUI_VERSION_NUM) ")" },
     { ImGuiLocKey_TableSizeOne,         "Size column to fit###SizeOne"          },
     { ImGuiLocKey_TableSizeAllFit,      "Size all columns to fit###SizeAll"     },
     { ImGuiLocKey_TableSizeAllDefault,  "Size all columns to default###SizeAll" },
@@ -4013,6 +4025,16 @@ bool ImGui::IsWindowContentHoverable(ImGuiWindow* window, ImGuiHoveredFlags flag
     return true;
 }
 
+static inline float CalcDelayFromHoveredFlags(ImGuiHoveredFlags flags)
+{
+    ImGuiContext& g = *GImGui;
+    if (flags & ImGuiHoveredFlags_DelayShort)
+        return g.Style.HoverDelayShort;
+    if (flags & ImGuiHoveredFlags_DelayNormal)
+        return g.Style.HoverDelayNormal;
+    return 0.0f;
+}
+
 // This is roughly matching the behavior of internal-facing ItemHoverable()
 // - we allow hovering to be true when ActiveId==window->MoveID, so that clicking on non-interactive items such as a Text() item still returns true with IsItemHovered()
 // - this should work even for non-interactive items that have no ID, so we cannot use LastItemId
@@ -4020,12 +4042,17 @@ bool ImGui::IsItemHovered(ImGuiHoveredFlags flags)
 {
     ImGuiContext& g = *GImGui;
     ImGuiWindow* window = g.CurrentWindow;
+    IM_ASSERT((flags & ~ImGuiHoveredFlags_AllowedMaskForIsItemHovered) == 0 && "Invalid flags for IsItemHovered()!");
+
     if (g.NavDisableMouseHover && !g.NavDisableHighlight && !(flags & ImGuiHoveredFlags_NoNavOverride))
     {
         if ((g.LastItemData.InFlags & ImGuiItemFlags_Disabled) && !(flags & ImGuiHoveredFlags_AllowWhenDisabled))
             return false;
         if (!IsItemFocused())
             return false;
+
+        if (flags & ImGuiHoveredFlags_ForTooltip)
+            flags |= g.Style.HoverFlagsForTooltipNav;
     }
     else
     {
@@ -4033,6 +4060,10 @@ bool ImGui::IsItemHovered(ImGuiHoveredFlags flags)
         ImGuiItemStatusFlags status_flags = g.LastItemData.StatusFlags;
         if (!(status_flags & ImGuiItemStatusFlags_HoveredRect))
             return false;
+
+        if (flags & ImGuiHoveredFlags_ForTooltip)
+            flags |= g.Style.HoverFlagsForTooltipMouse;
+
         IM_ASSERT((flags & (ImGuiHoveredFlags_AnyWindow | ImGuiHoveredFlags_RootWindow | ImGuiHoveredFlags_ChildWindows | ImGuiHoveredFlags_NoPopupHierarchy | ImGuiHoveredFlags_DockHierarchy)) == 0);   // Flags not supported by this function
 
         // Done with rectangle culling so we can perform heavier checks now
@@ -4069,20 +4100,22 @@ bool ImGui::IsItemHovered(ImGuiHoveredFlags flags)
 
     // Handle hover delay
     // (some ideas: https://www.nngroup.com/articles/timing-exposing-content)
-    float delay;
-    if (flags & ImGuiHoveredFlags_DelayNormal)
-        delay = g.IO.HoverDelayNormal;
-    else if (flags & ImGuiHoveredFlags_DelayShort)
-        delay = g.IO.HoverDelayShort;
-    else
-        delay = 0.0f;
-    if (delay > 0.0f)
+    const float delay = CalcDelayFromHoveredFlags(flags);
+    if (delay > 0.0f || (flags & ImGuiHoveredFlags_Stationary))
     {
         ImGuiID hover_delay_id = (g.LastItemData.ID != 0) ? g.LastItemData.ID : window->GetIDFromRectangle(g.LastItemData.Rect);
-        if ((flags & ImGuiHoveredFlags_NoSharedDelay) && (g.HoverDelayIdPreviousFrame != hover_delay_id))
-            g.HoverDelayTimer = 0.0f;
-        g.HoverDelayId = hover_delay_id;
-        return g.HoverDelayTimer >= delay;
+        if ((flags & ImGuiHoveredFlags_NoSharedDelay) && (g.HoverItemDelayIdPreviousFrame != hover_delay_id))
+            g.HoverItemDelayTimer = 0.0f;
+        g.HoverItemDelayId = hover_delay_id;
+
+        // When changing hovered item we requires a bit of stationary delay before activating hover timer,
+        // but once unlocked on a given item we also moving.
+        //if (g.HoverDelayTimer >= delay && (g.HoverDelayTimer - g.IO.DeltaTime < delay || g.MouseStationaryTimer - g.IO.DeltaTime < g.Style.HoverStationaryDelay)) { IMGUI_DEBUG_LOG("HoverDelayTimer = %f/%f, MouseStationaryTimer = %f\n", g.HoverDelayTimer, delay, g.MouseStationaryTimer); }
+        if ((flags & ImGuiHoveredFlags_Stationary) != 0 && g.HoverItemUnlockedStationaryId != hover_delay_id)
+            return false;
+
+        if (g.HoverItemDelayTimer < delay)
+            return false;
     }
 
     return true;
@@ -4716,21 +4749,33 @@ void ImGui::NewFrame()
     }
 #endif
 
+    // Record when we have been stationary as this state is preserved while over same item.
+    // FIXME: The way this is expressed means user cannot alter HoverStationaryDelay during the frame to use varying values.
+    // To allow this we should store HoverItemMaxStationaryTime+ID and perform the >= check in IsItemHovered() function.
+    if (g.HoverItemDelayId != 0 && g.MouseStationaryTimer >= g.Style.HoverStationaryDelay)
+        g.HoverItemUnlockedStationaryId = g.HoverItemDelayId;
+    else if (g.HoverItemDelayId == 0)
+        g.HoverItemUnlockedStationaryId = 0;
+    if (g.HoveredWindow != NULL && g.MouseStationaryTimer >= g.Style.HoverStationaryDelay)
+        g.HoverWindowUnlockedStationaryId = g.HoveredWindow->ID;
+    else if (g.HoveredWindow == NULL)
+        g.HoverWindowUnlockedStationaryId = 0;
+
     // Update hover delay for IsItemHovered() with delays and tooltips
-    g.HoverDelayIdPreviousFrame = g.HoverDelayId;
-    if (g.HoverDelayId != 0)
+    g.HoverItemDelayIdPreviousFrame = g.HoverItemDelayId;
+    if (g.HoverItemDelayId != 0)
     {
-        //if (g.IO.MouseDelta.x == 0.0f && g.IO.MouseDelta.y == 0.0f) // Need design/flags
-        g.HoverDelayTimer += g.IO.DeltaTime;
-        g.HoverDelayClearTimer = 0.0f;
-        g.HoverDelayId = 0;
+        g.HoverItemDelayTimer += g.IO.DeltaTime;
+        g.HoverItemDelayClearTimer = 0.0f;
+        g.HoverItemDelayId = 0;
     }
-    else if (g.HoverDelayTimer > 0.0f)
+    else if (g.HoverItemDelayTimer > 0.0f)
     {
         // This gives a little bit of leeway before clearing the hover timer, allowing mouse to cross gaps
-        g.HoverDelayClearTimer += g.IO.DeltaTime;
-        if (g.HoverDelayClearTimer >= ImMax(0.20f, g.IO.DeltaTime * 2.0f)) // ~6 frames at 30 Hz + allow for low framerate
-            g.HoverDelayTimer = g.HoverDelayClearTimer = 0.0f; // May want a decaying timer, in which case need to clamp at max first, based on max of caller last requested timer.
+        // We could expose 0.25f as style.HoverClearDelay but I am not sure of the logic yet, this is particularly subtle.
+        g.HoverItemDelayClearTimer += g.IO.DeltaTime;
+        if (g.HoverItemDelayClearTimer >= ImMax(0.25f, g.IO.DeltaTime * 2.0f)) // ~7 frames at 30 Hz + allow for low framerate
+            g.HoverItemDelayTimer = g.HoverItemDelayClearTimer = 0.0f; // May want a decaying timer, in which case need to clamp at max first, based on max of caller last requested timer.
     }
 
     // Drag and drop
@@ -6452,12 +6497,13 @@ void ImGui::UpdateWindowParentAndRootLinks(ImGuiWindow* window, ImGuiWindowFlags
 // When a modal popup is open, newly created windows that want focus (i.e. are not popups and do not specify ImGuiWindowFlags_NoFocusOnAppearing)
 // should be positioned behind that modal window, unless the window was created inside the modal begin-stack.
 // In case of multiple stacked modals newly created window honors begin stack order and does not go below its own modal parent.
-// - Window             // FindBlockingModal() returns Modal1
-//   - Window           //                  .. returns Modal1
+// - WindowA            // FindBlockingModal() returns Modal1
+//   - WindowB          //                  .. returns Modal1
 //   - Modal1           //                  .. returns Modal2
-//      - Window        //                  .. returns Modal2
-//          - Window    //                  .. returns Modal2
+//      - WindowC       //                  .. returns Modal2
+//          - WindowD   //                  .. returns Modal2
 //          - Modal2    //                  .. returns Modal2
+//            - WindowE //                  .. returns NULL
 // Notes:
 // - FindBlockingModal(NULL) == NULL is generally equivalent to GetTopMostPopupModal() == NULL.
 //   Only difference is here we check for ->Active/WasActive but it may be unecessary.
@@ -6468,7 +6514,7 @@ ImGuiWindow* ImGui::FindBlockingModal(ImGuiWindow* window)
         return NULL;
 
     // Find a modal that has common parent with specified window. Specified window should be positioned behind that modal.
-    for (int i = g.OpenPopupStack.Size - 1; i >= 0; i--)
+    for (int i = 0; i < g.OpenPopupStack.Size; i++)
     {
         ImGuiWindow* popup_window = g.OpenPopupStack.Data[i].Window;
         if (popup_window == NULL || !(popup_window->Flags & ImGuiWindowFlags_Modal))
@@ -6477,11 +6523,9 @@ ImGuiWindow* ImGui::FindBlockingModal(ImGuiWindow* window)
             continue;
         if (window == NULL)                                         // FindBlockingModal(NULL) test for if FocusWindow(NULL) is naturally possible via a mouse click.
             return popup_window;
-        if (IsWindowWithinBeginStackOf(window, popup_window))       // Window is rendered over last modal, no render order change needed.
-            break;
-        for (ImGuiWindow* parent = popup_window->ParentWindowInBeginStack->RootWindow; parent != NULL; parent = parent->ParentWindowInBeginStack->RootWindow)
-            if (IsWindowWithinBeginStackOf(window, parent))
-                return popup_window;                                // Place window above its begin stack parent.
+        if (IsWindowWithinBeginStackOf(window, popup_window))       // Window may be over modal
+            continue;
+        return popup_window;                                        // Place window right below first block modal
     }
     return NULL;
 }
@@ -7760,7 +7804,8 @@ bool ImGui::IsWindowAbove(ImGuiWindow* potential_above, ImGuiWindow* potential_b
 
 bool ImGui::IsWindowHovered(ImGuiHoveredFlags flags)
 {
-    IM_ASSERT((flags & (ImGuiHoveredFlags_AllowWhenOverlapped | ImGuiHoveredFlags_AllowWhenDisabled)) == 0);   // Flags not supported by this function
+    IM_ASSERT((flags & ~ImGuiHoveredFlags_AllowedMaskForIsWindowHovered) == 0 && "Invalid flags for IsWindowHovered()!");
+
     ImGuiContext& g = *GImGui;
     ImGuiWindow* ref_window = g.HoveredWindow;
     ImGuiWindow* cur_window = g.CurrentWindow;
@@ -7789,6 +7834,17 @@ bool ImGui::IsWindowHovered(ImGuiHoveredFlags flags)
     if (!(flags & ImGuiHoveredFlags_AllowWhenBlockedByActiveItem))
         if (g.ActiveId != 0 && !g.ActiveIdAllowOverlap && g.ActiveId != ref_window->MoveId)
             return false;
+
+    // When changing hovered window we requires a bit of stationary delay before activating hover timer.
+    // FIXME: We don't support delay other than stationary one for now, other delay would need a way
+    // to fullfill the possibility that multiple IsWindowHovered() with varying flag could return true
+    // for different windows of the hierarchy. Possibly need a Hash(Current+Flags) ==> (Timer) cache.
+    // We can implement this for _Stationary because the data is linked to HoveredWindow rather than CurrentWindow.
+    if (flags & ImGuiHoveredFlags_ForTooltip)
+        flags |= g.Style.HoverFlagsForTooltipMouse;
+    if ((flags & ImGuiHoveredFlags_Stationary) != 0 && g.HoverWindowUnlockedStationaryId != ref_window->ID)
+        return false;
+
     return true;
 }
 
@@ -9127,6 +9183,15 @@ static void ImGui::UpdateMouseInputs()
     else
         io.MouseDelta = ImVec2(0.0f, 0.0f);
 
+    // Update stationary timer. Only reset on 2 successive moving frames.
+    // FIXME: May need to expose threshold or treat touch inputs differently.
+    const float mouse_stationary_threshold = (io.MouseSource == ImGuiMouseSource_Mouse) ? 2.0f : 3.0f; // Slightly higher threshold for ImGuiMouseSource_TouchScreen/ImGuiMouseSource_Pen, may need rework.
+    g.MouseMovingFrames = (ImLengthSqr(io.MouseDelta) >= mouse_stationary_threshold * mouse_stationary_threshold) ? (g.MouseMovingFrames + 1) : 0;
+    if (g.MouseMovingFrames == 0)
+        g.MouseStationaryTimer += io.DeltaTime;
+    else if (g.MouseMovingFrames > 1)
+        g.MouseStationaryTimer = 0.0f;
+
     // If mouse moved we re-enable mouse hovering in case it was disabled by gamepad/keyboard. In theory should use a >0.0f threshold but would need to reset in everywhere we set this to true.
     if (io.MouseDelta.x != 0.0f || io.MouseDelta.y != 0.0f)
         g.NavDisableMouseHover = false;
@@ -10695,26 +10760,35 @@ bool ImGui::BeginTooltip()
     return BeginTooltipEx(ImGuiTooltipFlags_None, ImGuiWindowFlags_None);
 }
 
+bool ImGui::BeginItemTooltip()
+{
+    if (!IsItemHovered(ImGuiHoveredFlags_ForTooltip))
+        return false;
+    return BeginTooltipEx(ImGuiTooltipFlags_None, ImGuiWindowFlags_None);
+}
+
 bool ImGui::BeginTooltipEx(ImGuiTooltipFlags tooltip_flags, ImGuiWindowFlags extra_window_flags)
 {
     ImGuiContext& g = *GImGui;
 
     if (g.DragDropWithinSource || g.DragDropWithinTarget)
     {
-        // The default tooltip position is a little offset to give space to see the context menu (it's also clamped within the current viewport/monitor)
-        // In the context of a dragging tooltip we try to reduce that offset and we enforce following the cursor.
-        // Whatever we do we want to call SetNextWindowPos() to enforce a tooltip position and disable clipping the tooltip without our display area, like regular tooltip do.
+        // Drag and Drop tooltips are positioning differently than other tooltips:
+        // - offset visibility to increase visibility around mouse.
+        // - never clamp within outer viewport boundary.
+        // We call SetNextWindowPos() to enforce position and disable clamping.
+        // See FindBestWindowPosForPopup() for positionning logic of other tooltips (not drag and drop ones).
         //ImVec2 tooltip_pos = g.IO.MousePos - g.ActiveIdClickOffset - g.Style.WindowPadding;
-        ImVec2 tooltip_pos = g.IO.MousePos + ImVec2(16 * g.Style.MouseCursorScale, 8 * g.Style.MouseCursorScale);
+        ImVec2 tooltip_pos = g.IO.MousePos + TOOLTIP_DEFAULT_OFFSET * g.Style.MouseCursorScale;
         SetNextWindowPos(tooltip_pos);
         SetNextWindowBgAlpha(g.Style.Colors[ImGuiCol_PopupBg].w * 0.60f);
         //PushStyleVar(ImGuiStyleVar_Alpha, g.Style.Alpha * 0.60f); // This would be nice but e.g ColorButton with checkboard has issue with transparent colors :(
-        tooltip_flags |= ImGuiTooltipFlags_OverridePreviousTooltip;
+        tooltip_flags |= ImGuiTooltipFlags_OverridePrevious;
     }
 
     char window_name[16];
     ImFormatString(window_name, IM_ARRAYSIZE(window_name), "##Tooltip_%02d", g.TooltipOverrideCount);
-    if (tooltip_flags & ImGuiTooltipFlags_OverridePreviousTooltip)
+    if (tooltip_flags & ImGuiTooltipFlags_OverridePrevious)
         if (ImGuiWindow* window = FindWindowByName(window_name))
             if (window->Active)
             {
@@ -10738,22 +10812,40 @@ void ImGui::EndTooltip()
     End();
 }
 
+void ImGui::SetTooltip(const char* fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+    SetTooltipV(fmt, args);
+    va_end(args);
+}
+
 void ImGui::SetTooltipV(const char* fmt, va_list args)
 {
-    if (!BeginTooltipEx(ImGuiTooltipFlags_OverridePreviousTooltip, ImGuiWindowFlags_None))
+    if (!BeginTooltipEx(ImGuiTooltipFlags_OverridePrevious, ImGuiWindowFlags_None))
         return;
     TextV(fmt, args);
     EndTooltip();
 }
 
-void ImGui::SetTooltip(const char* fmt, ...)
+// Shortcut to use 'style.HoverFlagsForTooltipMouse' or 'style.HoverFlagsForTooltipNav'.
+// Defaults to == ImGuiHoveredFlags_Stationary | ImGuiHoveredFlags_DelayShort when using the mouse.
+void ImGui::SetItemTooltip(const char* fmt, ...)
 {
     va_list args;
     va_start(args, fmt);
-    SetTooltipV(fmt, args);
+    if (IsItemHovered(ImGuiHoveredFlags_ForTooltip))
+        SetTooltipV(fmt, args);
     va_end(args);
 }
 
+void ImGui::SetItemTooltipV(const char* fmt, va_list args)
+{
+    if (IsItemHovered(ImGuiHoveredFlags_ForTooltip))
+        SetTooltipV(fmt, args);
+}
+
+
 //-----------------------------------------------------------------------------
 // [SECTION] POPUPS
 //-----------------------------------------------------------------------------
@@ -11287,15 +11379,20 @@ ImVec2 ImGui::FindBestWindowPosForPopup(ImGuiWindow* window)
     }
     if (window->Flags & ImGuiWindowFlags_Tooltip)
     {
-        // Position tooltip (always follows mouse)
-        float sc = g.Style.MouseCursorScale;
-        ImVec2 ref_pos = NavCalcPreferredRefPos();
+        // Position tooltip (always follows mouse + clamp within outer boundaries)
+        // Note that drag and drop tooltips are NOT using this path: BeginTooltipEx() manually sets their position.
+        // In theory we could handle both cases in same location, but requires a bit of shuffling as drag and drop tooltips are calling SetWindowPos() leading to 'window_pos_set_by_api' being set in Begin()
+        IM_ASSERT(g.CurrentWindow == window);
+        const float scale = g.Style.MouseCursorScale;
+        const ImVec2 ref_pos = NavCalcPreferredRefPos();
+        const ImVec2 tooltip_pos = ref_pos + TOOLTIP_DEFAULT_OFFSET * scale;
         ImRect r_avoid;
         if (!g.NavDisableHighlight && g.NavDisableMouseHover && !(g.IO.ConfigFlags & ImGuiConfigFlags_NavEnableSetMousePos))
             r_avoid = ImRect(ref_pos.x - 16, ref_pos.y - 8, ref_pos.x + 16, ref_pos.y + 8);
         else
-            r_avoid = ImRect(ref_pos.x - 16, ref_pos.y - 8, ref_pos.x + 24 * sc, ref_pos.y + 24 * sc); // FIXME: Hard-coded based on mouse cursor shape expectation. Exact dimension not very important.
-        return FindBestWindowPosForPopupEx(ref_pos, window->Size, &window->AutoPosLastDirection, r_outer, r_avoid, ImGuiPopupPositionPolicy_Tooltip);
+            r_avoid = ImRect(ref_pos.x - 16, ref_pos.y - 8, ref_pos.x + 24 * scale, ref_pos.y + 24 * scale); // FIXME: Hard-coded based on mouse cursor shape expectation. Exact dimension not very important.
+        //GetForegroundDrawList()->AddRect(r_avoid.Min, r_avoid.Max, IM_COL32(255, 0, 255, 255));
+        return FindBestWindowPosForPopupEx(tooltip_pos, window->Size, &window->AutoPosLastDirection, r_outer, r_avoid, ImGuiPopupPositionPolicy_Tooltip);
     }
     IM_ASSERT(0);
     return window->Pos;
@@ -19040,7 +19137,7 @@ void ImGui::DebugTextEncoding(const char* str)
 static void MetricsHelpMarker(const char* desc)
 {
     ImGui::TextDisabled("(?)");
-    if (ImGui::IsItemHovered(ImGuiHoveredFlags_DelayShort) && ImGui::BeginTooltip())
+    if (ImGui::BeginItemTooltip())
     {
         ImGui::PushTextWrapPos(ImGui::GetFontSize() * 35.0f);
         ImGui::TextUnformatted(desc);
@@ -19135,7 +19232,7 @@ void ImGui::ShowMetricsWindow(bool* p_open)
             else if (rect_type == WRT_InnerRect)            { return window->InnerRect; }
             else if (rect_type == WRT_InnerClipRect)        { return window->InnerClipRect; }
             else if (rect_type == WRT_WorkRect)             { return window->WorkRect; }
-            else if (rect_type == WRT_Content)       { ImVec2 min = window->InnerRect.Min - window->Scroll + window->WindowPadding; return ImRect(min, min + window->ContentSize); }
+            else if (rect_type == WRT_Content)              { ImVec2 min = window->InnerRect.Min - window->Scroll + window->WindowPadding; return ImRect(min, min + window->ContentSize); }
             else if (rect_type == WRT_ContentIdeal)         { ImVec2 min = window->InnerRect.Min - window->Scroll + window->WindowPadding; return ImRect(min, min + window->ContentSizeIdeal); }
             else if (rect_type == WRT_ContentRegionRect)    { return window->ContentRegionRect; }
             IM_ASSERT(0);
@@ -19512,6 +19609,7 @@ void ImGui::ShowMetricsWindow(bool* p_open)
             Text("Mouse clicked:");  for (int i = 0; i < count; i++) if (IsMouseClicked(i)) { SameLine(); Text("b%d (%d)", i, io.MouseClickedCount[i]); }
             Text("Mouse released:"); for (int i = 0; i < count; i++) if (IsMouseReleased(i)) { SameLine(); Text("b%d", i); }
             Text("Mouse wheel: %.1f", io.MouseWheel);
+            Text("MouseStationaryTimer: %.2f", g.MouseStationaryTimer);
             Text("Mouse source: %s", GetMouseSourceName(io.MouseSource));
             Text("Pen Pressure: %.1f", io.PenPressure); // Note: currently unused
             Unindent();
@@ -19589,7 +19687,7 @@ void ImGui::ShowMetricsWindow(bool* p_open)
         Text("ActiveIdWindow: '%s'", g.ActiveIdWindow ? g.ActiveIdWindow->Name : "NULL");
         Text("ActiveIdUsing: AllKeyboardKeys: %d, NavDirMask: %X", g.ActiveIdUsingAllKeyboardKeys, g.ActiveIdUsingNavDirMask);
         Text("HoveredId: 0x%08X (%.2f sec), AllowOverlap: %d", g.HoveredIdPreviousFrame, g.HoveredIdTimer, g.HoveredIdAllowOverlap); // Not displaying g.HoveredId as it is update mid-frame
-        Text("HoverDelayId: 0x%08X, Timer: %.2f, ClearTimer: %.2f", g.HoverDelayId, g.HoverDelayTimer, g.HoverDelayClearTimer);
+        Text("HoverItemDelayId: 0x%08X, Timer: %.2f, ClearTimer: %.2f", g.HoverItemDelayId, g.HoverItemDelayTimer, g.HoverItemDelayClearTimer);
         Text("DragDrop: %d, SourceId = 0x%08X, Payload \"%s\" (%d bytes)", g.DragDropActive, g.DragDropPayload.SourceId, g.DragDropPayload.DataType, g.DragDropPayload.DataSize);
         DebugLocateItemOnHover(g.DragDropPayload.SourceId);
         Unindent();

imgui.h

@@ -23,7 +23,7 @@
 // Library Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals, e.g. '#if IMGUI_VERSION_NUM >= 12345')
 #define IMGUI_VERSION       "1.89.7 WIP"
-#define IMGUI_VERSION_NUM   18962
+#define IMGUI_VERSION_NUM   18964
 #define IMGUI_HAS_TABLE
 #define IMGUI_HAS_VIEWPORT          // Viewport WIP branch
 #define IMGUI_HAS_DOCK              // Docking WIP branch
@@ -674,12 +674,19 @@ namespace ImGui
     IMGUI_API bool          MenuItem(const char* label, const char* shortcut, bool* p_selected, bool enabled = true);              // return true when activated + toggle (*p_selected) if p_selected != NULL
 
     // Tooltips
-    // - Tooltip are windows following the mouse. They do not take focus away.
+    // - Tooltips are windows following the mouse. They do not take focus away.
     IMGUI_API bool          BeginTooltip();                                                     // begin/append a tooltip window. to create full-featured tooltip (with any kind of items).
-    IMGUI_API void          EndTooltip();                                                       // only call EndTooltip() if BeginTooltip() returns true!
+    IMGUI_API void          EndTooltip();                                                       // only call EndTooltip() if BeginTooltip()/BeginItemTooltip() returns true!
     IMGUI_API void          SetTooltip(const char* fmt, ...) IM_FMTARGS(1);                     // set a text-only tooltip, typically use with ImGui::IsItemHovered(). override any previous call to SetTooltip().
     IMGUI_API void          SetTooltipV(const char* fmt, va_list args) IM_FMTLIST(1);
 
+    // Tooltips: helper for showing a tooltip when hovering an item
+    // - BeginItemTooltip(), SetItemTooltip() are shortcuts for the 'if (IsItemHovered(ImGuiHoveredFlags_Tooltip)) { BeginTooltip() or SetTooltip() }' idiom.
+    // - Where 'ImGuiHoveredFlags_Tooltip' itself is a shortcut to use 'style.HoverFlagsForTooltipMouse' or 'style.HoverFlagsForTooltipNav'. For mouse it defaults to 'ImGuiHoveredFlags_Stationary | ImGuiHoveredFlags_DelayShort'.
+    IMGUI_API bool          BeginItemTooltip();                                                 // begin/append a tooltip window if preceding item was hovered.
+    IMGUI_API void          SetItemTooltip(const char* fmt, ...) IM_FMTARGS(1);                 // set a text-only tooltip if preceeding item was hovered. override any previous call to SetTooltip().
+    IMGUI_API void          SetItemTooltipV(const char* fmt, va_list args) IM_FMTLIST(1);
+
     // Popups, Modals
     //  - They block normal mouse hovering detection (and therefore most mouse interactions) behind them.
     //  - If not modal: they can be closed by clicking anywhere outside them, or by pressing ESCAPE.
@@ -1325,14 +1332,26 @@ enum ImGuiHoveredFlags_
     ImGuiHoveredFlags_AllowWhenBlockedByActiveItem  = 1 << 7,   // Return true even if an active item is blocking access to this item/window. Useful for Drag and Drop patterns.
     ImGuiHoveredFlags_AllowWhenOverlapped           = 1 << 8,   // IsItemHovered() only: Return true even if the position is obstructed or overlapped by another window
     ImGuiHoveredFlags_AllowWhenDisabled             = 1 << 9,   // IsItemHovered() only: Return true even if the item is disabled
-    ImGuiHoveredFlags_NoNavOverride                 = 1 << 10,  // Disable using gamepad/keyboard navigation state when active, always query mouse.
+    ImGuiHoveredFlags_NoNavOverride                 = 1 << 10,  // IsItemHovered() only: Disable using gamepad/keyboard navigation state when active, always query mouse
     ImGuiHoveredFlags_RectOnly                      = ImGuiHoveredFlags_AllowWhenBlockedByPopup | ImGuiHoveredFlags_AllowWhenBlockedByActiveItem | ImGuiHoveredFlags_AllowWhenOverlapped,
     ImGuiHoveredFlags_RootAndChildWindows           = ImGuiHoveredFlags_RootWindow | ImGuiHoveredFlags_ChildWindows,
 
-    // Hovering delays (for tooltips)
-    ImGuiHoveredFlags_DelayNormal                   = 1 << 11,  // Return true after io.HoverDelayNormal elapsed (~0.30 sec)
-    ImGuiHoveredFlags_DelayShort                    = 1 << 12,  // Return true after io.HoverDelayShort elapsed (~0.10 sec)
-    ImGuiHoveredFlags_NoSharedDelay                 = 1 << 13,  // Disable shared delay system where moving from one item to the next keeps the previous timer for a short time (standard for tooltips with long delays)
+    // Tooltips mode
+    // - typically used in IsItemHovered() + SetTooltip() sequence.
+    // - this is a shortcut to pull flags from 'style.HoverFlagsForTooltipMouse' or 'style.HoverFlagsForTooltipNav' where you can reconfigure desired behavior.
+    //   e.g. 'TooltipHoveredFlagsForMouse' defaults to 'ImGuiHoveredFlags_Stationary | ImGuiHoveredFlags_DelayShort'.
+    // - for frequently actioned or hovered items providing a tooltip, you want may to use ImGuiHoveredFlags_ForTooltip (stationary + delay) so the tooltip doesn't show too often.
+    // - for items which main purpose is to be hovered, or items with low affordance, or in less consistent apps, prefer no delay or shorter delay.
+    ImGuiHoveredFlags_ForTooltip                    = 1 << 11,  // Shortcut for standard flags when using IsItemHovered() + SetTooltip() sequence.
+
+    // (Advanced) Mouse Hovering delays.
+    // - generally you can use ImGuiHoveredFlags_ForTooltip to use application-standardized flags.
+    // - use those if you need specific overrides.
+    ImGuiHoveredFlags_Stationary                    = 1 << 12,  // Require mouse to be stationary for style.HoverStationaryDelay (~0.15 sec) _at least one time_. After this, can move on same item/window. Using the stationary test tends to reduces the need for a long delay.
+    ImGuiHoveredFlags_DelayNone                     = 1 << 13,  // IsItemHovered() only: Return true immediately (default). As this is the default you generally ignore this.
+    ImGuiHoveredFlags_DelayShort                    = 1 << 14,  // IsItemHovered() only: Return true after style.HoverDelayShort elapsed (~0.15 sec) (shared between items) + requires mouse to be stationary for style.HoverStationaryDelay (once per item).
+    ImGuiHoveredFlags_DelayNormal                   = 1 << 15,  // IsItemHovered() only: Return true after style.HoverDelayNormal elapsed (~0.40 sec) (shared between items) + requires mouse to be stationary for style.HoverStationaryDelay (once per item).
+    ImGuiHoveredFlags_NoSharedDelay                 = 1 << 16,  // IsItemHovered() only: Disable shared delay system where moving from one item to the next keeps the previous timer for a short time (standard for tooltips with long delays)
 };
 
 // Flags for ImGui::DockSpace(), shared/inherited by child nodes.
@@ -1965,6 +1984,13 @@ struct ImGuiStyle
     float       CircleTessellationMaxError; // Maximum error (in pixels) allowed when using AddCircle()/AddCircleFilled() or drawing rounded corner rectangles with no explicit segment count specified. Decrease for higher quality but more geometry.
     ImVec4      Colors[ImGuiCol_COUNT];
 
+    // Behaviors
+    float             HoverStationaryDelay;     // Delay for IsItemHovered(ImGuiHoveredFlags_Stationary). Time required to consider mouse stationary.
+    float             HoverDelayShort;          // Delay for IsItemHovered(ImGuiHoveredFlags_DelayShort). Usually used along with HoverStationaryDelay.
+    float             HoverDelayNormal;         // Delay for IsItemHovered(ImGuiHoveredFlags_DelayNormal). "
+    ImGuiHoveredFlags HoverFlagsForTooltipMouse;// Default flags when using IsItemHovered(ImGuiHoveredFlags_ForTooltip) or BeginItemTooltip()/SetItemTooltip() while using mouse.
+    ImGuiHoveredFlags HoverFlagsForTooltipNav;  // Default flags when using IsItemHovered(ImGuiHoveredFlags_ForTooltip) or BeginItemTooltip()/SetItemTooltip() while using keyboard/gamepad.
+
     IMGUI_API ImGuiStyle();
     IMGUI_API void ScaleAllSizes(float scale_factor);
 };
@@ -1999,13 +2025,6 @@ struct ImGuiIO
     float       IniSavingRate;                  // = 5.0f           // Minimum time between saving positions/sizes to .ini file, in seconds.
     const char* IniFilename;                    // = "imgui.ini"    // Path to .ini file (important: default "imgui.ini" is relative to current working dir!). Set NULL to disable automatic .ini loading/saving or if you want to manually call LoadIniSettingsXXX() / SaveIniSettingsXXX() functions.
     const char* LogFilename;                    // = "imgui_log.txt"// Path to .log file (default parameter to ImGui::LogToFile when no file is specified).
-    float       MouseDoubleClickTime;           // = 0.30f          // Time for a double-click, in seconds.
-    float       MouseDoubleClickMaxDist;        // = 6.0f           // Distance threshold to stay in to validate a double-click, in pixels.
-    float       MouseDragThreshold;             // = 6.0f           // Distance threshold before considering we are dragging.
-    float       KeyRepeatDelay;                 // = 0.275f         // When holding a key/button, time before it starts repeating, in seconds (for buttons in Repeat mode, etc.).
-    float       KeyRepeatRate;                  // = 0.050f         // When holding a key/button, rate at which it repeats, in seconds.
-    float       HoverDelayNormal;               // = 0.30 sec       // Delay on hovering before IsItemHovered(ImGuiHoveredFlags_DelayNormal) returns true.
-    float       HoverDelayShort;                // = 0.10 sec       // Delay on hovering before IsItemHovered(ImGuiHoveredFlags_DelayShort) returns true.
     void*       UserData;                       // = NULL           // Store your own data.
 
     ImFontAtlas*Fonts;                          // <auto>           // Font atlas: load, rasterize and pack one or more fonts into a single texture.
@@ -2037,18 +2056,31 @@ struct ImGuiIO
     bool        ConfigWindowsMoveFromTitleBarOnly; // = false       // Enable allowing to move windows only when clicking on their title bar. Does not apply to windows without a title bar.
     float       ConfigMemoryCompactTimer;       // = 60.0f          // Timer (in seconds) to free transient windows/tables memory buffers when unused. Set to -1.0f to disable.
 
+    // Inputs Behaviors
+    // (other variables, ones which are expected to be tweaked within UI code, are exposed in ImGuiStyle)
+    float       MouseDoubleClickTime;           // = 0.30f          // Time for a double-click, in seconds.
+    float       MouseDoubleClickMaxDist;        // = 6.0f           // Distance threshold to stay in to validate a double-click, in pixels.
+    float       MouseDragThreshold;             // = 6.0f           // Distance threshold before considering we are dragging.
+    float       KeyRepeatDelay;                 // = 0.275f         // When holding a key/button, time before it starts repeating, in seconds (for buttons in Repeat mode, etc.).
+    float       KeyRepeatRate;                  // = 0.050f         // When holding a key/button, rate at which it repeats, in seconds.
+
+    //------------------------------------------------------------------
     // Debug options
-    // - tools to test correct Begin/End and BeginChild/EndChild behaviors.
-    // - presently Begin()/End() and BeginChild()/EndChild() needs to ALWAYS be called in tandem, regardless of return value of BeginXXX()
-    //   this is inconsistent with other BeginXXX functions and create confusion for many users.
-    // - we expect to update the API eventually. In the meanwhile we provide tools to facilitate checking user-code behavior.
+    //------------------------------------------------------------------
+
+    // Tools to test correct Begin/End and BeginChild/EndChild behaviors.
+    // Presently Begin()/End() and BeginChild()/EndChild() needs to ALWAYS be called in tandem, regardless of return value of BeginXXX()
+    // This is inconsistent with other BeginXXX functions and create confusion for many users.
+    // We expect to update the API eventually. In the meanwhile we provide tools to facilitate checking user-code behavior.
     bool        ConfigDebugBeginReturnValueOnce;// = false          // First-time calls to Begin()/BeginChild() will return false. NEEDS TO BE SET AT APPLICATION BOOT TIME if you don't want to miss windows.
     bool        ConfigDebugBeginReturnValueLoop;// = false          // Some calls to Begin()/BeginChild() will return false. Will cycle through window depths then repeat. Suggested use: add "io.ConfigDebugBeginReturnValue = io.KeyShift" in your main loop then occasionally press SHIFT. Windows should be flickering while running.
-    // - option to deactivate io.AddFocusEvent(false) handling. May facilitate interactions with a debugger when focus loss leads to clearing inputs data.
-    // - backends may have other side-effects on focus loss, so this will reduce side-effects but not necessary remove all of them.
-    // - consider using e.g. Win32's IsDebuggerPresent() as an additional filter (or see ImOsIsDebuggerPresent() in imgui_test_engine/imgui_te_utils.cpp for a Unix compatible version).
+
+    // Option to deactivate io.AddFocusEvent(false) handling. May facilitate interactions with a debugger when focus loss leads to clearing inputs data.
+    // Backends may have other side-effects on focus loss, so this will reduce side-effects but not necessary remove all of them.
+    // Consider using e.g. Win32's IsDebuggerPresent() as an additional filter (or see ImOsIsDebuggerPresent() in imgui_test_engine/imgui_te_utils.cpp for a Unix compatible version).
     bool        ConfigDebugIgnoreFocusLoss;     // = false          // Ignore io.AddFocusEvent(false), consequently not calling io.ClearInputKeys() in input processing.
-    // - tools to audit ini data
+
+    // Option to audit .ini data
     bool        ConfigDebugIniSettings;         // = false          // Save .ini data with extra comments (particularly helpful for Docking, but makes saving slower)
 
     //------------------------------------------------------------------

imgui_demo.cpp

@@ -213,7 +213,7 @@ static void ShowDemoWindowInputs();
 static void HelpMarker(const char* desc)
 {
     ImGui::TextDisabled("(?)");
-    if (ImGui::IsItemHovered(ImGuiHoveredFlags_DelayShort) && ImGui::BeginTooltip())
+    if (ImGui::BeginItemTooltip())
     {
         ImGui::PushTextWrapPos(ImGui::GetFontSize() * 35.0f);
         ImGui::TextUnformatted(desc);
@@ -685,37 +685,8 @@ static void ShowDemoWindowWidgets()
         ImGui::SameLine();
         ImGui::Text("%d", counter);
 
-        {
-            // Tooltips
-            IMGUI_DEMO_MARKER("Widgets/Basic/Tooltips");
-            //ImGui::AlignTextToFramePadding();
-            ImGui::Text("Tooltips:");
-
-            ImGui::SameLine();
-            ImGui::SmallButton("Basic");
-            if (ImGui::IsItemHovered())
-                ImGui::SetTooltip("I am a tooltip");
-
-            ImGui::SameLine();
-            ImGui::SmallButton("Fancy");
-            if (ImGui::IsItemHovered() && ImGui::BeginTooltip())
-            {
-                ImGui::Text("I am a fancy tooltip");
-                static float arr[] = { 0.6f, 0.1f, 1.0f, 0.5f, 0.92f, 0.1f, 0.2f };
-                ImGui::PlotLines("Curve", arr, IM_ARRAYSIZE(arr));
-                ImGui::Text("Sin(time) = %f", sinf((float)ImGui::GetTime()));
-                ImGui::EndTooltip();
-            }
-
-            ImGui::SameLine();
-            ImGui::SmallButton("Delayed");
-            if (ImGui::IsItemHovered(ImGuiHoveredFlags_DelayNormal)) // With a delay
-                ImGui::SetTooltip("I am a tooltip with a delay.");
-
-            ImGui::SameLine();
-            HelpMarker(
-                "Tooltip are created by using the IsItemHovered() function over any kind of item.");
-        }
+        ImGui::Button("Tooltip");
+        ImGui::SetItemTooltip("I am a tooltip");
 
         ImGui::LabelText("label", "Value");
 
@@ -850,6 +821,73 @@ static void ShowDemoWindowWidgets()
         ImGui::TreePop();
     }
 
+    IMGUI_DEMO_MARKER("Widgets/Tooltips");
+    if (ImGui::TreeNode("Tooltips"))
+    {
+        // Tooltips are windows following the mouse. They do not take focus away.
+        ImGui::SeparatorText("General");
+
+        // Typical use cases:
+        // - Short-form (text only):      SetItemTooltip("Hello");
+        // - Short-form (any contents):   if (BeginItemTooltip()) { Text("Hello"); EndTooltip(); }
+
+        // - Full-form (text only):       if (IsItemHovered(...)) { SetTooltip("Hello"); }
+        // - Full-form (any contents):    if (IsItemHovered(...) && BeginTooltip()) { Text("Hello"); EndTooltip(); }
+
+        HelpMarker(
+            "Tooltip are typically created by using the IsItemHovered() + SetTooltip() functions over any kind of item.\n\n"
+            "We provide a helper SetItemTooltip() function to perform the two with standards flags.");
+
+        ImVec2 sz = ImVec2(-FLT_MIN, 0.0f);
+
+        ImGui::Button("Basic", sz);
+        ImGui::SetItemTooltip("I am a tooltip");
+
+        ImGui::Button("Fancy", sz);
+        if (ImGui::BeginItemTooltip())
+        {
+            ImGui::Text("I am a fancy tooltip");
+            static float arr[] = { 0.6f, 0.1f, 1.0f, 0.5f, 0.92f, 0.1f, 0.2f };
+            ImGui::PlotLines("Curve", arr, IM_ARRAYSIZE(arr));
+            ImGui::Text("Sin(time) = %f", sinf((float)ImGui::GetTime()));
+            ImGui::EndTooltip();
+        }
+
+        ImGui::SeparatorText("Custom");
+
+        // Showcase NOT relying on a IsItemHovered() to emit a tooltip.
+        static bool always_on = false;
+        ImGui::Checkbox("Always On", &always_on);
+        if (always_on)
+            ImGui::SetTooltip("I am following you around.");
+
+        // The following examples are passed for documentation purpose but may not be useful to most users.
+        // Passing ImGuiHoveredFlags_Tooltip to IsItemHovered() will pull ImGuiHoveredFlags flags values from
+        // 'style.HoverFlagsForTooltipMouse' or 'style.HoverFlagsForTooltipNav' depending on whether mouse or gamepad/keyboard is being used.
+        // With default settings, ImGuiHoveredFlags_Tooltip is equivalent to ImGuiHoveredFlags_DelayShort + ImGuiHoveredFlags_Stationary.
+        ImGui::Button("Manual", sz);
+        if (ImGui::IsItemHovered(ImGuiHoveredFlags_ForTooltip))
+            ImGui::SetTooltip("I am a manually emitted tooltip");
+
+        ImGui::Button("DelayNone", sz);
+        if (ImGui::IsItemHovered(ImGuiHoveredFlags_DelayNone))
+            ImGui::SetTooltip("I am a tooltip with no delay.");
+
+        ImGui::Button("DelayShort", sz);
+        if (ImGui::IsItemHovered(ImGuiHoveredFlags_DelayShort | ImGuiHoveredFlags_NoSharedDelay))
+            ImGui::SetTooltip("I am a tooltip with a short delay (%0.2f sec).", ImGui::GetStyle().HoverDelayShort);
+
+        ImGui::Button("DelayLong", sz);
+        if (ImGui::IsItemHovered(ImGuiHoveredFlags_DelayNormal | ImGuiHoveredFlags_NoSharedDelay))
+            ImGui::SetTooltip("I am a tooltip with a long delay (%0.2f sec)", ImGui::GetStyle().HoverDelayNormal);
+
+        ImGui::Button("Stationary", sz);
+        if (ImGui::IsItemHovered(ImGuiHoveredFlags_Stationary))
+            ImGui::SetTooltip("I am a tooltip requiring mouse to be stationary before activating.");
+
+        ImGui::TreePop();
+    }
+
     // Testing ImGuiOnceUponAFrame helper.
     //static ImGuiOnceUponAFrame once;
     //for (int i = 0; i < 5; i++)
@@ -1115,7 +1153,7 @@ static void ShowDemoWindowWidgets()
             ImVec4 tint_col = use_text_color_for_tint ? ImGui::GetStyleColorVec4(ImGuiCol_Text) : ImVec4(1.0f, 1.0f, 1.0f, 1.0f);   // No tint
             ImVec4 border_col = ImGui::GetStyleColorVec4(ImGuiCol_Border);
             ImGui::Image(my_tex_id, ImVec2(my_tex_w, my_tex_h), uv_min, uv_max, tint_col, border_col);
-            if (ImGui::IsItemHovered() && ImGui::BeginTooltip())
+            if (ImGui::BeginItemTooltip())
             {
                 float region_sz = 32.0f;
                 float region_x = io.MousePos.x - pos.x - region_sz * 0.5f;
@@ -2436,8 +2474,10 @@ static void ShowDemoWindowWidgets()
         if (item_type == 15){ const char* items[] = { "Apple", "Banana", "Cherry", "Kiwi" }; static int current = 1; ret = ImGui::ListBox("ITEM: ListBox", &current, items, IM_ARRAYSIZE(items), IM_ARRAYSIZE(items)); }
 
         bool hovered_delay_none = ImGui::IsItemHovered();
+        bool hovered_delay_stationary = ImGui::IsItemHovered(ImGuiHoveredFlags_Stationary);
         bool hovered_delay_short = ImGui::IsItemHovered(ImGuiHoveredFlags_DelayShort);
         bool hovered_delay_normal = ImGui::IsItemHovered(ImGuiHoveredFlags_DelayNormal);
+        bool hovered_delay_tooltip = ImGui::IsItemHovered(ImGuiHoveredFlags_ForTooltip); // = Normal + Stationary
 
         // Display the values of IsItemHovered() and other common item state functions.
         // Note that the ImGuiHoveredFlags_XXX flags can be combined.
@@ -2484,7 +2524,13 @@ static void ShowDemoWindowWidgets()
             ImGui::GetItemRectSize().x, ImGui::GetItemRectSize().y
         );
         ImGui::BulletText(
-            "w/ Hovering Delay: None = %d, Fast %d, Normal = %d", hovered_delay_none, hovered_delay_short, hovered_delay_normal);
+            "with Hovering Delay or Stationary test:\n"
+            "IsItemHovered() = = %d\n"
+            "IsItemHovered(_Stationary) = %d\n"
+            "IsItemHovered(_DelayShort) = %d\n"
+            "IsItemHovered(_DelayNormal) = %d\n"
+            "IsItemHovered(_Tooltip) = %d",
+            hovered_delay_none, hovered_delay_stationary, hovered_delay_short, hovered_delay_normal, hovered_delay_tooltip);
 
         if (item_disabled)
             ImGui::EndDisabled();
@@ -2545,7 +2591,8 @@ static void ShowDemoWindowWidgets()
             "IsWindowHovered(_RootWindow|_NoPopupHierarchy) = %d\n"
             "IsWindowHovered(_RootWindow|_DockHierarchy) = %d\n"
             "IsWindowHovered(_ChildWindows|_AllowWhenBlockedByPopup) = %d\n"
-            "IsWindowHovered(_AnyWindow) = %d\n",
+            "IsWindowHovered(_AnyWindow) = %d\n"
+            "IsWindowHovered(_Stationary) = %d\n",
             ImGui::IsWindowHovered(),
             ImGui::IsWindowHovered(ImGuiHoveredFlags_AllowWhenBlockedByPopup),
             ImGui::IsWindowHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem),
@@ -2559,7 +2606,8 @@ static void ShowDemoWindowWidgets()
             ImGui::IsWindowHovered(ImGuiHoveredFlags_RootWindow | ImGuiHoveredFlags_NoPopupHierarchy),
             ImGui::IsWindowHovered(ImGuiHoveredFlags_RootWindow | ImGuiHoveredFlags_DockHierarchy),
             ImGui::IsWindowHovered(ImGuiHoveredFlags_ChildWindows | ImGuiHoveredFlags_AllowWhenBlockedByPopup),
-            ImGui::IsWindowHovered(ImGuiHoveredFlags_AnyWindow));
+            ImGui::IsWindowHovered(ImGuiHoveredFlags_AnyWindow),
+            ImGui::IsWindowHovered(ImGuiHoveredFlags_Stationary));
 
         ImGui::BeginChild("child", ImVec2(0, 50), true);
         ImGui::Text("This is another child window for testing the _ChildWindows flag.");
@@ -2860,7 +2908,7 @@ static void ShowDemoWindowLayout()
             ImGui::PushID(i);
             ImGui::ListBox("", &selection[i], items, IM_ARRAYSIZE(items));
             ImGui::PopID();
-            //if (ImGui::IsItemHovered()) ImGui::SetTooltip("ListBox %d hovered", i);
+            //ImGui::SetItemTooltip("ListBox %d hovered", i);
         }
         ImGui::PopItemWidth();
 
@@ -2913,8 +2961,7 @@ static void ShowDemoWindowLayout()
             ImGui::SameLine();
             ImGui::Button("EEE");
             ImGui::EndGroup();
-            if (ImGui::IsItemHovered())
-                ImGui::SetTooltip("First group hovered");
+            ImGui::SetItemTooltip("First group hovered");
         }
         // Capture the group size and create widgets using the same size
         ImVec2 size = ImGui::GetItemRectSize();
@@ -3475,8 +3522,7 @@ static void ShowDemoWindowPopups()
 
             ImGui::Separator();
             ImGui::Text("Tooltip here");
-            if (ImGui::IsItemHovered())
-                ImGui::SetTooltip("I am a tooltip over a popup");
+            ImGui::SetItemTooltip("I am a tooltip over a popup");
 
             if (ImGui::Button("Stacked Popup"))
                 ImGui::OpenPopup("another popup");
@@ -3560,8 +3606,7 @@ static void ShowDemoWindowPopups()
                         ImGui::CloseCurrentPopup();
                     ImGui::EndPopup();
                 }
-                if (ImGui::IsItemHovered())
-                    ImGui::SetTooltip("Right-click to open popup");
+                ImGui::SetItemTooltip("Right-click to open popup");
             }
         }
 
@@ -3813,7 +3858,7 @@ static void EditTableSizingFlags(ImGuiTableFlags* p_flags)
     }
     ImGui::SameLine();
     ImGui::TextDisabled("(?)");
-    if (ImGui::IsItemHovered() && ImGui::BeginTooltip())
+    if (ImGui::BeginItemTooltip())
     {
         ImGui::PushTextWrapPos(ImGui::GetFontSize() * 50.0f);
         for (int m = 0; m < IM_ARRAYSIZE(policies); m++)
@@ -6014,10 +6059,11 @@ void ImGui::ShowAboutWindow(bool* p_open)
         return;
     }
     IMGUI_DEMO_MARKER("Tools/About Dear ImGui");
-    ImGui::Text("Dear ImGui %s", ImGui::GetVersion());
+    ImGui::Text("Dear ImGui %s (%d)", IMGUI_VERSION, IMGUI_VERSION_NUM);
     ImGui::Separator();
     ImGui::Text("By Omar Cornut and all Dear ImGui contributors.");
     ImGui::Text("Dear ImGui is licensed under the MIT License, see LICENSE for more information.");
+    ImGui::Text("If your company uses this, please consider sponsoring the project!");
 
     static bool show_config_info = false;
     ImGui::Checkbox("Config/Build Information", &show_config_info);
@@ -6316,8 +6362,22 @@ void ImGui::ShowStyleEditor(ImGuiStyle* ref)
             ImGui::SliderFloat2("SeparatorTextPadding", (float*)&style.SeparatorTextPadding, 0.0f, 40.0f, "%0.f");
             ImGui::SliderFloat("LogSliderDeadzone", &style.LogSliderDeadzone, 0.0f, 12.0f, "%.0f");
 
+            ImGui::SeparatorText("Tooltips");
+            for (int n = 0; n < 2; n++)
+                if (ImGui::TreeNodeEx(n == 0 ? "HoverFlagsForTooltipMouse" : "HoverFlagsForTooltipNav"))
+                {
+                    ImGuiHoveredFlags* p = (n == 0) ? &style.HoverFlagsForTooltipMouse : &style.HoverFlagsForTooltipNav;
+                    ImGui::CheckboxFlags("ImGuiHoveredFlags_DelayNone", p, ImGuiHoveredFlags_DelayNone);
+                    ImGui::CheckboxFlags("ImGuiHoveredFlags_DelayShort", p, ImGuiHoveredFlags_DelayShort);
+                    ImGui::CheckboxFlags("ImGuiHoveredFlags_DelayNormal", p, ImGuiHoveredFlags_DelayNormal);
+                    ImGui::CheckboxFlags("ImGuiHoveredFlags_Stationary", p, ImGuiHoveredFlags_Stationary);
+                    ImGui::CheckboxFlags("ImGuiHoveredFlags_NoSharedDelay", p, ImGuiHoveredFlags_NoSharedDelay);
+                    ImGui::TreePop();
+                }
+
             ImGui::SeparatorText("Misc");
             ImGui::SliderFloat2("DisplaySafeAreaPadding", (float*)&style.DisplaySafeAreaPadding, 0.0f, 30.0f, "%.0f"); ImGui::SameLine(); HelpMarker("Adjust if you cannot see the edges of your screen (e.g. on a TV where scaling has not been configured).");
+
             ImGui::EndTabItem();
         }
 

imgui_internal.h

@@ -278,6 +278,8 @@ namespace ImStb
 #define IM_F32_TO_INT8_SAT(_VAL)        ((int)(ImSaturate(_VAL) * 255.0f + 0.5f))               // Saturated, always output 0..255
 #define IM_FLOOR(_VAL)                  ((float)(int)(_VAL))                                    // ImFloor() is not inlined in MSVC debug builds
 #define IM_ROUND(_VAL)                  ((float)(int)((_VAL) + 0.5f))                           //
+#define IM_STRINGIFY_HELPER(_X)         #_X
+#define IM_STRINGIFY(_X)                IM_STRINGIFY_HELPER(_X)                                 // Preprocessor idiom to stringify e.g. an integer.
 
 // Enforce cdecl calling convention for functions called by the standard library, in case compilation settings changed the default to e.g. __vectorcall
 #ifdef _MSC_VER
@@ -841,6 +843,14 @@ enum ImGuiItemStatusFlags_
 #endif
 };
 
+// Extend ImGuiHoveredFlags_
+enum ImGuiHoveredFlagsPrivate_
+{
+    ImGuiHoveredFlags_DelayMask_                    = ImGuiHoveredFlags_DelayNone | ImGuiHoveredFlags_DelayShort | ImGuiHoveredFlags_DelayNormal | ImGuiHoveredFlags_NoSharedDelay,
+    ImGuiHoveredFlags_AllowedMaskForIsWindowHovered = ImGuiHoveredFlags_ChildWindows | ImGuiHoveredFlags_RootWindow | ImGuiHoveredFlags_AnyWindow | ImGuiHoveredFlags_NoPopupHierarchy | ImGuiHoveredFlags_DockHierarchy | ImGuiHoveredFlags_AllowWhenBlockedByPopup | ImGuiHoveredFlags_AllowWhenBlockedByActiveItem | ImGuiHoveredFlags_ForTooltip | ImGuiHoveredFlags_Stationary,
+    ImGuiHoveredFlags_AllowedMaskForIsItemHovered   = ImGuiHoveredFlags_AllowWhenBlockedByPopup | ImGuiHoveredFlags_AllowWhenBlockedByActiveItem | ImGuiHoveredFlags_AllowWhenOverlapped | ImGuiHoveredFlags_AllowWhenDisabled | ImGuiHoveredFlags_NoNavOverride | ImGuiHoveredFlags_ForTooltip | ImGuiHoveredFlags_Stationary | ImGuiHoveredFlags_DelayMask_,
+};
+
 // Extend ImGuiInputTextFlags_
 enum ImGuiInputTextFlagsPrivate_
 {
@@ -906,6 +916,7 @@ enum ImGuiSelectableFlagsPrivate_
 enum ImGuiTreeNodeFlagsPrivate_
 {
     ImGuiTreeNodeFlags_ClipLabelForTrailingButton = 1 << 20,
+    ImGuiTreeNodeFlags_UpsideDownArrow            = 1 << 21,// (FIXME-WIP) Turn Down arrow into an Up arrow, but reversed trees (#6517)
 };
 
 enum ImGuiSeparatorFlags_
@@ -935,7 +946,7 @@ enum ImGuiTextFlags_
 enum ImGuiTooltipFlags_
 {
     ImGuiTooltipFlags_None                      = 0,
-    ImGuiTooltipFlags_OverridePreviousTooltip   = 1 << 0,   // Override will clear/ignore previously submitted tooltip (defaults to append)
+    ImGuiTooltipFlags_OverridePrevious          = 1 << 1,   // Clear/ignore previously submitted tooltip (defaults to append)
 };
 
 // FIXME: this is in development, not exposed/functional as a generic feature yet.
@@ -1829,6 +1840,7 @@ struct ImGuiSettingsHandler
 // This is experimental and not officially supported, it'll probably fall short of features, if/when it does we may backtrack.
 enum ImGuiLocKey : int
 {
+    ImGuiLocKey_VersionStr,
     ImGuiLocKey_TableSizeOne,
     ImGuiLocKey_TableSizeAllFit,
     ImGuiLocKey_TableSizeAllDefault,
@@ -2106,7 +2118,6 @@ struct ImGuiContext
 
     // Render
     float                   DimBgRatio;                         // 0.0..1.0 animation when fading in a dimming background (for modal window and CTRL+TAB list)
-    ImGuiMouseCursor        MouseCursor;
 
     // Drag and Drop
     bool                    DragDropActive;
@@ -2146,13 +2157,20 @@ struct ImGuiContext
     ImVector<ImGuiShrinkWidthItem>  ShrinkWidthBuffer;
 
     // Hover Delay system
-    ImGuiID                 HoverDelayId;
-    ImGuiID                 HoverDelayIdPreviousFrame;
-    float                   HoverDelayTimer;                    // Currently used IsItemHovered(), generally inferred from g.HoveredIdTimer but kept uncleared until clear timer elapse.
-    float                   HoverDelayClearTimer;               // Currently used IsItemHovered(): grace time before g.TooltipHoverTimer gets cleared.
+    ImGuiID                 HoverItemDelayId;
+    ImGuiID                 HoverItemDelayIdPreviousFrame;
+    float                   HoverItemDelayTimer;                // Currently used by IsItemHovered()
+    float                   HoverItemDelayClearTimer;           // Currently used by IsItemHovered(): grace time before g.TooltipHoverTimer gets cleared.
+    ImGuiID                 HoverItemUnlockedStationaryId;      // Mouse has once been stationary on this item. Only reset after departing the item.
+    ImGuiID                 HoverWindowUnlockedStationaryId;    // Mouse has once been stationary on this window. Only reset after departing the window.
+
+    // Mouse state
+    ImGuiMouseCursor        MouseCursor;
+    int                     MouseMovingFrames;
+    float                   MouseStationaryTimer;               // Time the mouse has been stationary (with some loose heuristic)
+    ImVec2                  MouseLastValidPos;
 
     // Widget state
-    ImVec2                  MouseLastValidPos;
     ImGuiInputTextState     InputTextState;
     ImGuiInputTextDeactivatedState InputTextDeactivatedState;
     ImFont                  InputTextPasswordFont;
@@ -2343,7 +2361,6 @@ struct ImGuiContext
         NavWindowingToggleLayer = false;
 
         DimBgRatio = 0.0f;
-        MouseCursor = ImGuiMouseCursor_Arrow;
 
         DragDropActive = DragDropWithinSource = DragDropWithinTarget = false;
         DragDropSourceFlags = ImGuiDragDropFlags_None;
@@ -2363,8 +2380,12 @@ struct ImGuiContext
         TablesTempDataStacked = 0;
         CurrentTabBar = NULL;
 
-        HoverDelayId = HoverDelayIdPreviousFrame = 0;
-        HoverDelayTimer = HoverDelayClearTimer = 0.0f;
+        HoverItemDelayId = HoverItemDelayIdPreviousFrame = HoverItemUnlockedStationaryId = HoverWindowUnlockedStationaryId = 0;
+        HoverItemDelayTimer = HoverItemDelayClearTimer = 0.0f;
+
+        MouseCursor = ImGuiMouseCursor_Arrow;
+        MouseMovingFrames = 0;
+        MouseStationaryTimer = 0.0f;
 
         TempInputId = 0;
         ColorEditOptions = ImGuiColorEditFlags_DefaultOptions_;

imgui_tables.cpp

@@ -3036,8 +3036,8 @@ void ImGui::TableHeader(const char* label)
     RenderTextEllipsis(window->DrawList, label_pos, ImVec2(ellipsis_max, label_pos.y + label_height + g.Style.FramePadding.y), ellipsis_max, ellipsis_max, label, label_end, &label_size);
 
     const bool text_clipped = label_size.x > (ellipsis_max - label_pos.x);
-    if (text_clipped && hovered && g.ActiveId == 0 && IsItemHovered(ImGuiHoveredFlags_DelayNormal))
-        SetTooltip("%.*s", (int)(label_end - label), label);
+    if (text_clipped && hovered && g.ActiveId == 0)
+        SetItemTooltip("%.*s", (int)(label_end - label), label);
 
     // We don't use BeginPopupContextItem() because we want the popup to stay up even after the column is hidden
     if (IsMouseReleased(1) && IsItemHovered())

imgui_widgets.cpp

@@ -5808,7 +5808,7 @@ bool ImGui::ColorButton(const char* desc_id, const ImVec4& col, ImGuiColorEditFl
     }
 
     // Tooltip
-    if (!(flags & ImGuiColorEditFlags_NoTooltip) && hovered)
+    if (!(flags & ImGuiColorEditFlags_NoTooltip) && hovered && IsItemHovered(ImGuiHoveredFlags_ForTooltip))
         ColorTooltip(desc_id, &col.x, flags & (ImGuiColorEditFlags_InputMask_ | ImGuiColorEditFlags_NoAlpha | ImGuiColorEditFlags_AlphaPreview | ImGuiColorEditFlags_AlphaPreviewHalf));
 
     return pressed;
@@ -5838,7 +5838,7 @@ void ImGui::ColorTooltip(const char* text, const float* col, ImGuiColorEditFlags
 {
     ImGuiContext& g = *GImGui;
 
-    if (!BeginTooltipEx(ImGuiTooltipFlags_OverridePreviousTooltip, ImGuiWindowFlags_None))
+    if (!BeginTooltipEx(ImGuiTooltipFlags_OverridePrevious, ImGuiWindowFlags_None))
         return;
     const char* text_end = text ? FindRenderedTextEnd(text, NULL) : text;
     if (text_end > text)
@@ -6266,7 +6266,7 @@ bool ImGui::TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* l
         if (flags & ImGuiTreeNodeFlags_Bullet)
             RenderBullet(window->DrawList, ImVec2(text_pos.x - text_offset_x * 0.60f, text_pos.y + g.FontSize * 0.5f), text_col);
         else if (!is_leaf)
-            RenderArrow(window->DrawList, ImVec2(text_pos.x - text_offset_x + padding.x, text_pos.y), text_col, is_open ? ImGuiDir_Down : ImGuiDir_Right, 1.0f);
+            RenderArrow(window->DrawList, ImVec2(text_pos.x - text_offset_x + padding.x, text_pos.y), text_col, is_open ? ((flags & ImGuiTreeNodeFlags_UpsideDownArrow) ? ImGuiDir_Up : ImGuiDir_Down) : ImGuiDir_Right, 1.0f);
         else // Leaf without bullet, left-adjusted text
             text_pos.x -= text_offset_x;
         if (flags & ImGuiTreeNodeFlags_ClipLabelForTrailingButton)
@@ -8596,8 +8596,7 @@ bool    ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
     // FIXME: We may want disabled tab to still display the tooltip?
     if (text_clipped && g.HoveredId == id && !held)
         if (!(tab_bar->Flags & ImGuiTabBarFlags_NoTooltip) && !(tab->Flags & ImGuiTabItemFlags_NoTooltip))
-            if (IsItemHovered(ImGuiHoveredFlags_DelayNormal))
-                SetTooltip("%.*s", (int)(FindRenderedTextEnd(label) - label), label);
+            SetItemTooltip("%.*s", (int)(FindRenderedTextEnd(label) - label), label);
 
     IM_ASSERT(!is_tab_button || !(tab_bar->SelectedTabId == tab->ID && is_tab_button)); // TabItemButton should not be selected
     if (is_tab_button)