Added IsRootWindowOrAnyChildHovered() helper (#615)

imgui.cpp

@@ -4579,15 +4579,19 @@ bool ImGui::IsWindowFocused()
 bool ImGui::IsRootWindowFocused()
 {
     ImGuiState& g = *GImGui;
-    ImGuiWindow* root_window = g.CurrentWindow->RootWindow;
-    return g.FocusedWindow == root_window;
+    return g.FocusedWindow == g.CurrentWindow->RootWindow;
 }
 
 bool ImGui::IsRootWindowOrAnyChildFocused()
 {
     ImGuiState& g = *GImGui;
-    ImGuiWindow* root_window = g.CurrentWindow->RootWindow;
-    return g.FocusedWindow && g.FocusedWindow->RootWindow == root_window;
+    return g.FocusedWindow && g.FocusedWindow->RootWindow == g.CurrentWindow->RootWindow;
+}
+
+bool ImGui::IsRootWindowOrAnyChildHovered()
+{
+    ImGuiState& g = *GImGui;
+    return g.HoveredRootWindow && (g.HoveredRootWindow == g.CurrentWindow->RootWindow) && IsWindowContentHoverable(g.HoveredRootWindow);
 }
 
 float ImGui::GetWindowWidth()

imgui.h

@@ -385,8 +385,9 @@ namespace ImGui
     IMGUI_API void          SetItemAllowOverlap();                                              // allow last item to be overlapped by a subsequent item. sometimes useful with invisible buttons, selectables, etc. to catch unused area.
     IMGUI_API bool          IsWindowHovered();                                                  // is current window hovered and hoverable (not blocked by a popup) (differentiate child windows from each others)
     IMGUI_API bool          IsWindowFocused();                                                  // is current window focused
-    IMGUI_API bool          IsRootWindowFocused();                                              // is current root window focused (top parent window in case of child windows)
+    IMGUI_API bool          IsRootWindowFocused();                                              // is current root window focused (root = top-most parent of a child, otherwise self)
     IMGUI_API bool          IsRootWindowOrAnyChildFocused();                                    // is current root window or any of its child (including current window) focused
+    IMGUI_API bool          IsRootWindowOrAnyChildHovered();                                    // is current root window or any of its child (including current window) hovered and hoverable (not blocked by a popup)
     IMGUI_API bool          IsRectVisible(const ImVec2& size);                                  // test if rectangle of given size starting from cursor pos is visible (not clipped). to perform coarse clipping on user's side (as an optimization)
     IMGUI_API bool          IsPosHoveringAnyWindow(const ImVec2& pos);                          // is given position hovering any active imgui window
     IMGUI_API float         GetTime();