Added ImGuiWindowFlags_NoBringToFrontOnFocus behavior.

imgui.cpp

@@ -4149,9 +4149,9 @@ void ImGui::FocusWindow(ImGuiWindow* window)
         if (g.ActiveId != 0 && g.ActiveIdWindow && g.ActiveIdWindow->RootWindow != window)
             ImGui::SetActiveID(0);
 
-    if (g.Windows.back() == window)
+    // Bring to front
+    if ((window->Flags & ImGuiWindowFlags_NoBringToFrontOnFocus) || g.Windows.back() == window)
         return;
-
     for (int i = 0; i < g.Windows.Size; i++)
         if (g.Windows[i] == window)
         {

imgui.h

@@ -458,6 +458,7 @@ enum ImGuiWindowFlags_
     ImGuiWindowFlags_MenuBar                = 1 << 10,  // Has a menu-bar
     ImGuiWindowFlags_HorizontalScrollbar    = 1 << 11,  // Enable horizontal scrollbar (off by default). You need to use SetNextWindowContentSize(ImVec2(width,0.0f)); prior to calling Begin() to specify width. Read code in imgui_demo in the "Horizontal Scrolling" section.
     ImGuiWindowFlags_NoFocusOnAppearing     = 1 << 12,  // Disable taking focus when transitioning from hidden to visible state
+    ImGuiWindowFlags_NoBringToFrontOnFocus  = 1 << 13,  // Disable bringing window to front when taking focus (e.g. clicking on it or programatically giving it focus)
     // [Internal]
     ImGuiWindowFlags_ChildWindow            = 1 << 20,  // Don't use! For internal use by BeginChild()
     ImGuiWindowFlags_ChildWindowAutoFitX    = 1 << 21,  // Don't use! For internal use by BeginChild()