Set g.HoveredId when item is disabled. Prevents window from being dragged if mouse hovers a disabled item.

Author: rokups

imgui.cpp

@@ -3062,15 +3062,16 @@ bool ImGui::ItemHoverable(const ImRect& bb, ImGuiID id)
         return false;
     if (g.NavDisableMouseHover || !IsWindowContentHoverable(window, ImGuiHoveredFlags_None))
         return false;
+
+    SetHoveredID(id);
+
     if (window->DC.ItemFlags & ImGuiItemFlags_Disabled)
         return false;
 
     // We exceptionally allow this function to be called with id==0 to allow using it for easy high-level
     // hover test in widgets code. We could also decide to split this function is two.
     if (id != 0)
     {
-        SetHoveredID(id);
-
         // [DEBUG] Item Picker tool!
         // We perform the check here because SetHoveredID() is not frequently called (1~ time a frame), making
         // the cost of this tool near-zero. We can get slightly better call-stack and support picking non-hovered

imgui_widgets.cpp

@@ -463,6 +463,9 @@ bool ImGui::ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool
     ImGuiContext& g = *GImGui;
     ImGuiWindow* window = GetCurrentWindow();
 
+    bool pressed = false;
+    bool hovered = ItemHoverable(bb, id);
+
     if (flags & ImGuiButtonFlags_Disabled)
     {
         if (out_hovered) *out_hovered = false;
@@ -489,9 +492,6 @@ bool ImGui::ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool
         IMGUI_TEST_ENGINE_ITEM_ADD(bb, id);
 #endif
 
-    bool pressed = false;
-    bool hovered = ItemHoverable(bb, id);
-
     // Drag source doesn't report as hovered
     if (hovered && g.DragDropActive && g.DragDropPayload.SourceId == id && !(g.DragDropSourceFlags & ImGuiDragDropFlags_SourceNoDisableHover))
         hovered = false;
@@ -1365,7 +1365,7 @@ bool ImGui::SplitterBehavior(const ImRect& bb, ImGuiID id, ImGuiAxis axis, float
     if (g.ActiveId != id)
         SetItemAllowOverlap();
 
-    if (held || (g.HoveredId == id && g.HoveredIdPreviousFrame == id && g.HoveredIdTimer >= hover_visibility_delay))
+    if (held || (hovered && g.HoveredIdPreviousFrame == id && g.HoveredIdTimer >= hover_visibility_delay))
         SetMouseCursor(axis == ImGuiAxis_Y ? ImGuiMouseCursor_ResizeNS : ImGuiMouseCursor_ResizeEW);
 
     ImRect bb_render = bb;
@@ -2189,7 +2189,7 @@ bool ImGui::DragScalar(const char* label, ImGuiDataType data_type, void* p_data,
         return TempInputScalar(frame_bb, id, label, data_type, p_data, format);// , p_min, p_max);
 
     // Draw frame
-    const ImU32 frame_col = GetColorU32(g.ActiveId == id ? ImGuiCol_FrameBgActive : g.HoveredId == id ? ImGuiCol_FrameBgHovered : ImGuiCol_FrameBg);
+    const ImU32 frame_col = GetColorU32(g.ActiveId == id ? ImGuiCol_FrameBgActive : hovered ? ImGuiCol_FrameBgHovered : ImGuiCol_FrameBg);
     RenderNavHighlight(frame_bb, id);
     RenderFrame(frame_bb.Min, frame_bb.Max, frame_col, true, style.FrameRounding);
 
@@ -2642,7 +2642,7 @@ bool ImGui::SliderScalar(const char* label, ImGuiDataType data_type, void* p_dat
         return TempInputScalar(frame_bb, id, label, data_type, p_data, format);// , p_min, p_max);
 
     // Draw frame
-    const ImU32 frame_col = GetColorU32(g.ActiveId == id ? ImGuiCol_FrameBgActive : g.HoveredId == id ? ImGuiCol_FrameBgHovered : ImGuiCol_FrameBg);
+    const ImU32 frame_col = GetColorU32(g.ActiveId == id ? ImGuiCol_FrameBgActive : hovered ? ImGuiCol_FrameBgHovered : ImGuiCol_FrameBg);
     RenderNavHighlight(frame_bb, id);
     RenderFrame(frame_bb.Min, frame_bb.Max, frame_col, true, g.Style.FrameRounding);
 
@@ -2788,7 +2788,7 @@ bool ImGui::VSliderScalar(const char* label, const ImVec2& size, ImGuiDataType d
     }
 
     // Draw frame
-    const ImU32 frame_col = GetColorU32(g.ActiveId == id ? ImGuiCol_FrameBgActive : g.HoveredId == id ? ImGuiCol_FrameBgHovered : ImGuiCol_FrameBg);
+    const ImU32 frame_col = GetColorU32(g.ActiveId == id ? ImGuiCol_FrameBgActive : hovered ? ImGuiCol_FrameBgHovered : ImGuiCol_FrameBg);
     RenderNavHighlight(frame_bb, id);
     RenderFrame(frame_bb.Min, frame_bb.Max, frame_col, true, g.Style.FrameRounding);
 
@@ -6347,7 +6347,7 @@ bool ImGui::BeginMenu(const char* label, bool enabled)
         RenderArrow(window->DrawList, pos + ImVec2(window->DC.MenuColumns.Pos[2] + extra_w + g.FontSize * 0.30f, 0.0f), text_col, ImGuiDir_Right);
     }
 
-    const bool hovered = enabled && ItemHoverable(window->DC.LastItemRect, id);
+    const bool hovered = ItemHoverable(window->DC.LastItemRect, id) && enabled;
     if (menuset_is_open)
         g.NavWindow = backed_nav_window;
 
@@ -7216,7 +7216,6 @@ bool    ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
     bool pressed = ButtonBehavior(bb, id, &hovered, &held, button_flags);
     if (pressed)
         tab_bar->NextSelectedTabId = id;
-    hovered |= (g.HoveredId == id);
 
     // Allow the close button to overlap unless we are dragging (in which case we don't want any overlapping tabs to be hovered)
     if (!held)
@@ -7281,7 +7280,7 @@ bool    ImGui::TabItemEx(ImGuiTabBar* tab_bar, const char* label, bool* p_open,
 
     // Tooltip (FIXME: Won't work over the close button because ItemOverlap systems messes up with HoveredIdTimer)
     // We test IsItemHovered() to discard e.g. when another item is active or drag and drop over the tab bar (which g.HoveredId ignores)
-    if (g.HoveredId == id && !held && g.HoveredIdNotActiveTimer > 0.50f && IsItemHovered())
+    if (hovered && !held && g.HoveredIdNotActiveTimer > 0.50f && IsItemHovered())
         if (!(tab_bar->Flags & ImGuiTabBarFlags_NoTooltip) && !(tab->Flags & ImGuiTabItemFlags_NoTooltip))
             SetTooltip("%.*s", (int)(FindRenderedTextEnd(label) - label), label);