Created
October 22, 2013 11:21
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This class adds a File > Scene Autoload menu containing options to select a "master scene" enable it to be auto-loaded when the user presses play in the editor. When enabled, the selected scene will be loaded on play, then the original scene will be reloaded on stop.
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using UnityEngine; | |
using UnityEditor; | |
/// <summary> | |
/// Scene auto loader. | |
/// </summary> | |
/// <description> | |
/// This class adds a File > Scene Autoload menu containing options to select | |
/// a "master scene" enable it to be auto-loaded when the user presses play | |
/// in the editor. When enabled, the selected scene will be loaded on play, | |
/// then the original scene will be reloaded on stop. | |
/// | |
/// Based on an idea on this thread: | |
/// http://forum.unity3d.com/threads/157502-Executing-first-scene-in-build-settings-when-pressing-play-button-in-editor | |
/// </description> | |
[InitializeOnLoad] | |
static class SceneAutoLoader | |
{ | |
// Static constructor binds a playmode-changed callback. | |
// [InitializeOnLoad] above makes sure this gets executed. | |
static SceneAutoLoader() | |
{ | |
EditorApplication.playmodeStateChanged += OnPlayModeChanged; | |
} | |
// Menu items to select the "master" scene and control whether or not to load it. | |
[MenuItem("File/Scene Autoload/Select Master Scene...")] | |
private static void SelectMasterScene() | |
{ | |
string masterScene = EditorUtility.OpenFilePanel("Select Master Scene", Application.dataPath, "unity"); | |
if (!string.IsNullOrEmpty(masterScene)) | |
{ | |
MasterScene = masterScene; | |
LoadMasterOnPlay = true; | |
} | |
} | |
[MenuItem("File/Scene Autoload/Load Master On Play", true)] | |
private static bool ShowLoadMasterOnPlay() | |
{ | |
return !LoadMasterOnPlay; | |
} | |
[MenuItem("File/Scene Autoload/Load Master On Play")] | |
private static void EnableLoadMasterOnPlay() | |
{ | |
LoadMasterOnPlay = true; | |
} | |
[MenuItem("File/Scene Autoload/Don't Load Master On Play", true)] | |
private static bool ShowDontLoadMasterOnPlay() | |
{ | |
return LoadMasterOnPlay; | |
} | |
[MenuItem("File/Scene Autoload/Don't Load Master On Play")] | |
private static void DisableLoadMasterOnPlay() | |
{ | |
LoadMasterOnPlay = false; | |
} | |
// Play mode change callback handles the scene load/reload. | |
private static void OnPlayModeChanged() | |
{ | |
if (!LoadMasterOnPlay) | |
{ | |
return; | |
} | |
if (!EditorApplication.isPlaying && EditorApplication.isPlayingOrWillChangePlaymode) | |
{ | |
// User pressed play -- autoload master scene. | |
PreviousScene = EditorApplication.currentScene; | |
if (EditorApplication.SaveCurrentSceneIfUserWantsTo()) | |
{ | |
if (!EditorApplication.OpenScene(MasterScene)) | |
{ | |
Debug.LogError(string.Format("error: scene not found: {0}", MasterScene)); | |
EditorApplication.isPlaying = false; | |
} | |
} | |
else | |
{ | |
// User cancelled the save operation -- cancel play as well. | |
EditorApplication.isPlaying = false; | |
} | |
} | |
if (EditorApplication.isPlaying && !EditorApplication.isPlayingOrWillChangePlaymode) | |
{ | |
// User pressed stop -- reload previous scene. | |
if (!EditorApplication.OpenScene(PreviousScene)) | |
{ | |
Debug.LogError(string.Format("error: scene not found: {0}", PreviousScene)); | |
} | |
} | |
} | |
// Properties are remembered as editor preferences. | |
private const string cEditorPrefLoadMasterOnPlay = "SceneAutoLoader.LoadMasterOnPlay"; | |
private const string cEditorPrefMasterScene = "SceneAutoLoader.MasterScene"; | |
private const string cEditorPrefPreviousScene = "SceneAutoLoader.PreviousScene"; | |
private static bool LoadMasterOnPlay | |
{ | |
get { return EditorPrefs.GetBool(cEditorPrefLoadMasterOnPlay, false); } | |
set { EditorPrefs.SetBool(cEditorPrefLoadMasterOnPlay, value); } | |
} | |
private static string MasterScene | |
{ | |
get { return EditorPrefs.GetString(cEditorPrefMasterScene, "Master.unity"); } | |
set { EditorPrefs.SetString(cEditorPrefMasterScene, value); } | |
} | |
private static string PreviousScene | |
{ | |
get { return EditorPrefs.GetString(cEditorPrefPreviousScene, EditorApplication.currentScene); } | |
set { EditorPrefs.SetString(cEditorPrefPreviousScene, value); } | |
} | |
} |
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