Disabled: clicking a disabled item focuses parent window. Fix/amend 83ecc84. (#8064)

83ecc84 was too not supporting widgets using ItemHoverable() directly + too complex.
Revert 83ecc84 in ButtonBehavior(), reimplement in UpdateMouseMovingWindowEndFrame()>

imgui.cpp

@@ -4875,12 +4875,13 @@ void ImGui::UpdateMouseMovingWindowNewFrame()
     }
 }
 
-// Initiate moving window when clicking on empty space or title bar.
+// Initiate focusing and moving window when clicking on empty space or title bar.
+// Initiate focusing window when clicking on a disabled item.
 // Handle left-click and right-click focus.
 void ImGui::UpdateMouseMovingWindowEndFrame()
 {
     ImGuiContext& g = *GImGui;
-    if (g.ActiveId != 0 || g.HoveredId != 0)
+    if (g.ActiveId != 0 || (g.HoveredId != 0 && !g.HoveredIdIsDisabled))
         return;
 
     // Unless we just made a window/popup appear
@@ -4906,7 +4907,8 @@ void ImGui::UpdateMouseMovingWindowEndFrame()
                     if (!root_window->TitleBarRect().Contains(g.IO.MouseClickedPos[0]))
                         g.MovingWindow = NULL;
 
-            // Cancel moving if clicked over an item which was disabled or inhibited by popups (note that we know HoveredId == 0 already)
+            // Cancel moving if clicked over an item which was disabled or inhibited by popups
+            // (when g.HoveredIdIsDisabled == true && g.HoveredId == 0 we are inhibited by popups, when g.HoveredIdIsDisabled == true && g.HoveredId != 0 we are over a disabled item)0 already)
             if (g.HoveredIdIsDisabled)
                 g.MovingWindow = NULL;
         }
@@ -4920,7 +4922,7 @@ void ImGui::UpdateMouseMovingWindowEndFrame()
     // With right mouse button we close popups without changing focus based on where the mouse is aimed
     // Instead, focus will be restored to the window under the bottom-most closed popup.
     // (The left mouse button path calls FocusWindow on the hovered window, which will lead NewFrame->ClosePopupsOverWindow to trigger)
-    if (g.IO.MouseClicked[1])
+    if (g.IO.MouseClicked[1] && g.HoveredId == 0)
     {
         // Find the top-most window between HoveredWindow and the top-most Modal Window.
         // This is where we can trim the popup stack.

imgui_widgets.cpp

@@ -542,8 +542,7 @@ bool ImGui::ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool
 
     // Mouse handling
     const ImGuiID test_owner_id = (flags & ImGuiButtonFlags_NoTestKeyOwner) ? ImGuiKeyOwner_Any : id;
-    const bool hovered_disabled = (g.HoveredId == id && g.HoveredIdIsDisabled);
-    if (hovered || hovered_disabled)
+    if (hovered)
     {
         IM_ASSERT(id != 0); // Lazily check inside rare path.
 
@@ -561,7 +560,7 @@ bool ImGui::ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool
 
         // Process initial action
         const bool mods_ok = !(flags & ImGuiButtonFlags_NoKeyModsAllowed) || (!g.IO.KeyCtrl && !g.IO.KeyShift && !g.IO.KeyAlt);
-        if (mods_ok && !hovered_disabled)
+        if (mods_ok)
         {
             if (mouse_button_clicked != -1 && g.ActiveId != id)
             {
@@ -619,17 +618,6 @@ bool ImGui::ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool
                 if (g.IO.MouseDownDuration[g.ActiveIdMouseButton] > 0.0f && IsMouseClicked(g.ActiveIdMouseButton, ImGuiInputFlags_Repeat, test_owner_id))
                     pressed = true;
         }
-        else if (mods_ok && hovered_disabled)
-        {
-            if (mouse_button_clicked != -1 && g.ActiveId != id)
-            {
-                // Disabled path still focus
-                // FIXME-NAV: Could somehow call SetNavID() with a null ID but mouse pos as NavRectRel so nav may be resumed?
-                // Will do it once we do it for regular click on window-void.
-                if (flags & (ImGuiButtonFlags_PressedOnClickRelease | ImGuiButtonFlags_PressedOnClickReleaseAnywhere | ImGuiButtonFlags_PressedOnClick | ImGuiButtonFlags_PressedOnDoubleClick))
-                    FocusWindow(window, ImGuiFocusRequestFlags_RestoreFocusedChild);
-            }
-        }
 
         if (pressed)
             g.NavDisableHighlight = true;