EditorUtility.DisplayProgressBar 显示进度条

// Simple Editor Script that fills a bar in the given seconds.
//用给定的秒数填充进度条
class EditorUtilityDisplayProgressBar extends EditorWindow {
	var secs = 10.0;
	var startVal = 0;
	var progress = 0;

	@MenuItem("Examples/Progress Bar Usage")
	static function Init() {
		var window = GetWindow(EditorUtilityDisplayProgressBar);
		window.Show();
	}

	function OnGUI() {
		secs = EditorGUILayout.IntField("Time to wait:", secs);
		if(GUILayout.Button("Display bar")) {
			if(secs < 1) {
				Debug.LogError("Seconds should be bigger than 1");
				return;
			}
			startVal = EditorApplication.timeSinceStartup;
		}

		if(progress < secs)
			EditorUtility.DisplayProgressBar(
				"Simple Progress Bar",
				"Shows a progress bar for the given seconds",
				progress/secs);
		else
			EditorUtility.ClearProgressBar();

		progress = EditorApplication.timeSinceStartup - startVal;
	}

	function OnInspectorUpdate() {
		Repaint();
	}
}