NewFrame: Removed unnecessary call to FindHoveredWindow() and simplified code (went through this multiple times, hopefully haven't broken anything)

imgui.cpp

@@ -629,7 +629,7 @@ static void             SetWindowScrollY(ImGuiWindow* window, float new_scroll_y
 static void             SetWindowPos(ImGuiWindow* window, const ImVec2& pos, ImGuiCond cond);
 static void             SetWindowSize(ImGuiWindow* window, const ImVec2& size, ImGuiCond cond);
 static void             SetWindowCollapsed(ImGuiWindow* window, bool collapsed, ImGuiCond cond);
-static ImGuiWindow*     FindHoveredWindow(ImVec2 pos, bool excluding_childs);
+static ImGuiWindow*     FindHoveredWindow(ImVec2 pos);
 static ImGuiWindow*     CreateNewWindow(const char* name, ImVec2 size, ImGuiWindowFlags flags);
 static void             ClearSetNextWindowData();
 static void             CheckStacksSize(ImGuiWindow* window, bool write);
@@ -2362,11 +2362,8 @@ void ImGui::NewFrame()
     }
 
     // Find the window we are hovering. Child windows can extend beyond the limit of their parent so we need to derive HoveredRootWindow from HoveredWindow
-    g.HoveredWindow = g.MovingWindow ? g.MovingWindow : FindHoveredWindow(g.IO.MousePos, false);
+    g.HoveredWindow = g.MovingWindow ? g.MovingWindow : FindHoveredWindow(g.IO.MousePos);
-    if (g.HoveredWindow && (g.HoveredWindow->Flags & ImGuiWindowFlags_ChildWindow))
+    g.HoveredRootWindow = g.HoveredWindow ? g.HoveredWindow->RootWindow : NULL;
-        g.HoveredRootWindow = g.HoveredWindow->RootWindow;
-    else
-        g.HoveredRootWindow = g.MovingWindow ? g.MovingWindow->RootWindow : FindHoveredWindow(g.IO.MousePos, true);
 
     if (ImGuiWindow* modal_window = GetFrontMostModalRootWindow())
     {
@@ -3239,7 +3236,7 @@ void ImGui::CalcListClipping(int items_count, float items_height, int* out_items
 
 // Find window given position, search front-to-back
 // FIXME: Note that we have a lag here because WindowRectClipped is updated in Begin() so windows moved by user via SetWindowPos() and not SetNextWindowPos() will have that rectangle lagging by a frame at the time FindHoveredWindow() is called, aka before the next Begin(). Moving window thankfully isn't affected.
-static ImGuiWindow* FindHoveredWindow(ImVec2 pos, bool excluding_childs)
+static ImGuiWindow* FindHoveredWindow(ImVec2 pos)
 {
     ImGuiContext& g = *GImGui;
     for (int i = g.Windows.Size-1; i >= 0; i--)
@@ -3249,10 +3246,8 @@ static ImGuiWindow* FindHoveredWindow(ImVec2 pos, bool excluding_childs)
             continue;
         if (window->Flags & ImGuiWindowFlags_NoInputs)
             continue;
-        if (excluding_childs && (window->Flags & ImGuiWindowFlags_ChildWindow) != 0)
-            continue;
 
-        // Using the clipped AABB so a child window will typically be clipped by its parent.
+        // Using the clipped AABB, a child window will typically be clipped by its parent (not always)
         ImRect bb(window->WindowRectClipped.Min - g.Style.TouchExtraPadding, window->WindowRectClipped.Max + g.Style.TouchExtraPadding);
         if (bb.Contains(pos))
             return window;