Nav: SetFocusID() clears NavInitRequest for consistency (repro would a same frame interaction / race condition). (#787)

imgui.cpp

@@ -2027,6 +2027,8 @@ void ImGui::SetFocusID(ImGuiID id, ImGuiWindow* window)
 
     // Assume that SetFocusID() is called in the context where its NavLayer is the current layer, which is the case everywhere we call it.
     const int nav_layer = window->DC.NavLayerCurrent;
+    if (g.NavWindow != window)
+        g.NavInitRequest = false;
     g.NavId = id;
     g.NavWindow = window;
     g.NavLayer = nav_layer;
@@ -6238,8 +6240,7 @@ void ImGui::FocusWindow(ImGuiWindow* window)
             g.NavMousePosDirty = true;
         if (window && window->NavLastChildNavWindow != NULL)
             window->NavLastChildNavWindow = NULL;
-        if (g.NavInitRequest)
-            g.NavInitRequest = false;
+        g.NavInitRequest = false;
     }
 
     // Passing NULL allow to disable keyboard focus

imgui_internal.h

@@ -621,7 +621,7 @@ struct ImGuiContext
     int                     NavLayer;                           // Layer we are navigating on. For now the system is hard-coded for 0=main contents and 1=menu/title bar, may expose layers later.
     int                     NavIdTabCounter;                    // == NavWindow->DC.FocusIdxTabCounter at time of NavId processing
     bool                    NavIdIsAlive;                       // Nav widget has been seen this frame ~~ NavRefRectRel is valid
-    bool                    NavMousePosDirty;
+    bool                    NavMousePosDirty;                   // When set we will update mouse position if (NavFlags & ImGuiNavFlags_MoveMouse) if set
     bool                    NavDisableHighlight;                // When user starts using mouse, we hide gamepad/keyboard highlight (nb: but they are still available, which is why NavDisableHighlight isn't always != NavDisableMouseHover)
     bool                    NavDisableMouseHover;               // When user starts using gamepad/keyboard, we hide mouse hovering highlight until mouse is touched again.
     bool                    NavAnyRequest;                      // ~~ NavMoveRequest || NavInitRequest