garden_client/Assets/Editor/EdTest.cs

using UnityEditor;
using UnityEngine;

using System.Collections;
using System.Collections.Generic;

[CustomEditor(typeof(Test))]
public class EdTest : Editor
{
    public override void OnInspectorGUI()
    {
        base.OnInspectorGUI();

        if (GUILayout.Button("Show"))
        {
            EditorUtility.DisplayProgressBar("Test", "Info", 0.5f);
        }

        if (GUILayout.Button("Test"))
        {
            EditorUtility.ClearProgressBar();
        }
    }
}