A progress bar to display proportion completed of Editor extension processing

If an Editor task is going to take more than half a second or so, then we should indicate progress complete/remaining to the user via a progress bar so that they understand that something is actually happening and the application has not crashed and frozen.

Getting ready

This recipe adds to the previous one, so make a copy of that project folder and do your work for this recipe with that copy.

How to do it...

To add a progress bar during the loop (and then remove it after the loop is complete), replace the PlacePrefabs() method with the following code:

static void PlacePrefabs(){
  string assetPath = "Assets/Prefabs/prefab_star.prefab";
  starPrefab = (GameObject)AssetDatabase.LoadMainAssetAtPath(assetPath);

  int total = 100;
  for(int i = 0; i < total; i++){
    CreateRandomInstance();
    EditorUtility.DisplayProgressBar("Creating your starfield", i + "%", i/100f);
  }

  EditorUtility...