Internals: Moving window: test mouse validity while translating window + using SetWindowPos().

imgui.cpp

@@ -3234,13 +3234,13 @@ static void ImGui::UpdateMovingWindow()
         KeepAliveID(g.ActiveId);
         IM_ASSERT(g.MovingWindow && g.MovingWindow->RootWindow);
         ImGuiWindow* moving_window = g.MovingWindow->RootWindow;
-        if (g.IO.MouseDown[0])
+        if (g.IO.MouseDown[0] && IsMousePosValid(&g.IO.MousePos))
         {
             ImVec2 pos = g.IO.MousePos - g.ActiveIdClickOffset;
             if (moving_window->PosFloat.x != pos.x || moving_window->PosFloat.y != pos.y)
             {
                 MarkIniSettingsDirty(moving_window);
-                moving_window->PosFloat = pos;
+                SetWindowPos(moving_window, pos, ImGuiCond_Always);
             }
             FocusWindow(g.MovingWindow);
         }