Create WindowAlwaysOnTop.cs

unitycoder · web-flow · commit d92e853dcaee · 2021-12-28T15:38:40.000+02:00
diff --git a/Assets/Scripts/Helpers/Windows/WindowAlwaysOnTop.cs b/Assets/Scripts/Helpers/Windows/WindowAlwaysOnTop.cs
@@ -0,0 +1,39 @@
+// keep executable window always on top, good for multiplayer testing
+
+using System;
+using System.Runtime.InteropServices;
+using UnityEngine;
+
+namespace UnityLibrary
+{
+    public class WindowAlwaysOnTop : MonoBehaviour
+    {
+        // https://stackoverflow.com/a/34703664/5452781
+        private static readonly IntPtr HWND_TOPMOST = new IntPtr(-1);
+        private const UInt32 SWP_NOSIZE = 0x0001;
+        private const UInt32 SWP_NOMOVE = 0x0002;
+        private const UInt32 TOPMOST_FLAGS = SWP_NOMOVE | SWP_NOSIZE;
+
+        [DllImport("user32.dll")]
+        [return: MarshalAs(UnmanagedType.Bool)]
+        public static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);
+
+        // https://forum.unity.com/threads/unity-window-handle.115364/#post-1650240
+        [DllImport("user32.dll")]
+        private static extern IntPtr GetActiveWindow();
+
+        public static IntPtr GetWindowHandle()
+        {
+            return GetActiveWindow();
+        }
+
+        void Awake()
+        {
+            // TODO save current window pos to player prefs on exit, then can open into same position next time
+#if !UNITY_EDITOR
+        Debug.Log("Make window stay on top");
+        SetWindowPos(GetActiveWindow(), HWND_TOPMOST, 0, 0, 0, 0, TOPMOST_FLAGS);
+#endif
+        }
+    }
+}
