private void AddTag(string tag)
        {
            if (!m_TagControl.Add(tag, true))
                return;

            RestartLogCat();
        }
        public override void OnGUI(Rect rect)
        {
            var  currentEvent = Event.current;
            bool hitEnter     = currentEvent.type == EventType.KeyDown && (currentEvent.keyCode == KeyCode.Return || currentEvent.keyCode == KeyCode.KeypadEnter);

            const float kEntryMargin = 8;

            EditorGUILayout.BeginVertical();
            GUILayout.Space(kEntryMargin);

            // Draw the input field & "Add" Button.
            EditorGUILayout.BeginHorizontal(GUILayout.ExpandWidth(true));
            GUI.SetNextControlName(kTagInputTextFieldControlId);
            m_InputTagName = EditorGUILayout.TextField(m_InputTagName, GUILayout.Height(AndroidLogcatStyles.kTagEntryFixedHeight + 2));
            var trimmedTagName = m_InputTagName.Trim();

            if (trimmedTagName.Length > 23)
            {
                GUILayout.Space(kEntryMargin + 2);
                EditorGUILayout.EndHorizontal();
                EditorGUILayout.BeginHorizontal();
                GUILayout.Space(kEntryMargin + 7);
                EditorGUILayout.HelpBox("The logging tag can be at most 23 characters, was " + trimmedTagName.Length + " .", MessageType.Warning);
            }
            else
            {
                if (GUILayout.Button("Add", GUILayout.Width(40)) || (hitEnter && GUI.GetNameOfFocusedControl() == kTagInputTextFieldControlId))
                {
                    if (!string.IsNullOrEmpty(trimmedTagName))
                    {
                        m_TagControl.Add(trimmedTagName);
                        m_InputTagName             = string.Empty;
                        GUIUtility.keyboardControl = 0; // Have to remove the focus from the input text field to clear it.
                    }
                }
            }
            GUILayout.Space(4);
            EditorGUILayout.EndHorizontal();
            DoTagListGUI(kEntryMargin);
            EditorGUILayout.EndVertical();
        }