public override void OnGUI(Rect position, SerializedProperty property, GUIContent label) { if (this._clipboard == null) { this._clipboard = AssetDatabase.LoadAssetAtPath(AssetDatabase.GUIDToAssetPath("cb0c76a45c0e1f64788be1f278d1d65f"), typeof(Texture)) as Texture; } Rect copyButtonCanvas = EditorExtensions.ExtractSpaceHorizontal(ref position, 20.0f); EditorGUI.PropertyField(position, property, label); if (GUI.Button(copyButtonCanvas, _clipboard)) { EditorGUIUtility.systemCopyBuffer = property.ValueAsString(); EditorWindow.focusedWindow.ShowNotification(new GUIContent(string.Format("\"{0}\" copied to clipboard.", EditorGUIUtility.systemCopyBuffer))); } }