Tweak HoverDelayClearTimer. Not exposing since I am unsure logic is viable (and is rather complex with upcoming addition of stationary logic). (#1485)

+ Tweaked default value of io.HoverDelayNormal from 0.30 to 0.35.

docs/CHANGELOG.txt

@@ -41,6 +41,8 @@ Other changes:
 - 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)
+- IsItemHovered: Tweaked default value of io.HoverDelayNormal from 0.30 to 0.35 (used when
+  using the ImGuiHoveredFlags_DelayNormal flag). (#1485)
 - 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)
 - Debug Tools: Added 'io.ConfigDebugIniSettings' option to save .ini data with extra
@@ -50,7 +52,7 @@ Other changes:
   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)
+  and support the example app being compiled without UNICODE. (#6516, #5725, #5961, #5975) [@yenixing]
 
 
 -----------------------------------------------------------------------

imgui.cpp

@@ -1218,7 +1218,7 @@ ImGuiIO::ImGuiIO()
 #endif
     KeyRepeatDelay = 0.275f;
     KeyRepeatRate = 0.050f;
-    HoverDelayNormal = 0.30f;
+    HoverDelayNormal = 0.35f;
     HoverDelayShort = 0.10f;
     UserData = NULL;
 
@@ -4549,8 +4549,9 @@ void ImGui::NewFrame()
     else if (g.HoverDelayTimer > 0.0f)
     {
         // This gives a little bit of leeway before clearing the hover timer, allowing mouse to cross gaps
+        // We could expose 0.25f as io.HoverClearDelay but I am not sure of the logic yet, this is particularly subtle.
         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
+        if (g.HoverDelayClearTimer >= ImMax(0.25f, g.IO.DeltaTime * 2.0f)) // ~7 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.
     }
 
@@ -8529,7 +8530,8 @@ static void ImGui::UpdateMouseInputs()
         io.MouseDelta = ImVec2(0.0f, 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)
+    const bool is_stationary = (g.IO.MouseDelta.x == 0.0f && g.IO.MouseDelta.y == 0.0f);
+    if (!is_stationary)
         g.NavDisableMouseHover = false;
 
     io.MousePosPrev = io.MousePos;

imgui.h

@@ -1285,8 +1285,8 @@ enum ImGuiHoveredFlags_
     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)
+    // Mouse Hovering delays (for tooltips)
+    ImGuiHoveredFlags_DelayNormal                   = 1 << 11,  // Return true after io.HoverDelayNormal elapsed (~0.35 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)
 };
@@ -1929,7 +1929,7 @@ struct ImGuiIO
     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       HoverDelayNormal;               // = 0.35 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.
 

imgui_internal.h

@@ -1919,7 +1919,6 @@ 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;
@@ -1961,11 +1960,14 @@ struct ImGuiContext
     // 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.
+    float                   HoverDelayTimer;                    // Currently used by IsItemHovered()
+    float                   HoverDelayClearTimer;               // Currently used by IsItemHovered(): grace time before g.TooltipHoverTimer gets cleared.
 
-    // Widget state
+    // Mouse state
+    ImGuiMouseCursor        MouseCursor;
     ImVec2                  MouseLastValidPos;
+
+    // Widget state
     ImGuiInputTextState     InputTextState;
     ImGuiInputTextDeactivatedState InputTextDeactivatedState;
     ImFont                  InputTextPasswordFont;
@@ -2142,7 +2144,6 @@ struct ImGuiContext
         NavWindowingToggleLayer = false;
 
         DimBgRatio = 0.0f;
-        MouseCursor = ImGuiMouseCursor_Arrow;
 
         DragDropActive = DragDropWithinSource = DragDropWithinTarget = false;
         DragDropSourceFlags = ImGuiDragDropFlags_None;
@@ -2165,6 +2166,8 @@ struct ImGuiContext
         HoverDelayId = HoverDelayIdPreviousFrame = 0;
         HoverDelayTimer = HoverDelayClearTimer = 0.0f;
 
+        MouseCursor = ImGuiMouseCursor_Arrow;
+
         TempInputId = 0;
         ColorEditOptions = ImGuiColorEditFlags_DefaultOptions_;
         ColorEditCurrentID = ColorEditSavedID = 0;