public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
        {
            float minValue = 0f;
            float maxValue = Atr.MaxValue.Ex_ClampMin(minValue);
            float currentValue;
            Rect  propRect = new Rect(position.x, position.y, position.width, Height);
            Rect  backRect = new Rect(position.x, position.y + Height, position.width, Height * 1.5f);

            switch (property.propertyType)
            {
            case SerializedPropertyType.Integer:

                // 값 범위 강제 제한
                if (Atr.ClampInRange)
                {
                    property.intValue = property.intValue.Ex_Clamp((int)minValue, (int)maxValue);
                }
                currentValue = property.intValue;
                break;

            case SerializedPropertyType.Float:

                if (Atr.ClampInRange)
                {
                    property.floatValue = property.floatValue.Ex_Clamp(minValue, maxValue);
                }
                currentValue = property.floatValue;
                break;

            default:
                EditorGUI.PropertyField(propRect, property, label, true);
                EditorHelper.ColorErrorBox(backRect, $"[ProgressBar - Error] 숫자 타입에만 사용할 수 있습니다.\n대상 타입 : {property.type} ");
                return;
            }


            // 바 가로길이 구하기
            float ratio   = (currentValue / maxValue).Ex_Clamp(0f, 1f);
            Rect  barRect = new Rect(position.x, position.y + Height, position.width * ratio, Height * 1.5f);

            // 기본 필드 그리기
            if (Atr.ClampInRange)
            {
                label.text = $"{label.text} [Clamped]";
            }
            EditorGUI.PropertyField(propRect, property, label, true);

            // 바 그리기
            EditorGUI.DrawRect(backRect, Color.black);
            EditorGUI.DrawRect(barRect, Atr.BarColor.Ex_Convert());

            // 텍스트 그리기
            var textStyle = new GUIStyle(GUI.skin.label);

            textStyle.fontStyle        = FontStyle.Bold;
            textStyle.normal.textColor = Atr.TextColor.Ex_Convert();
            textStyle.fontSize         = 20;
            textStyle.alignment        = TextAnchor.MiddleCenter;

            EditorGUI.LabelField(backRect, $"{currentValue} / {maxValue}", textStyle);
        }