[unity] Fixed compile error on Unity 2018.3+.

spine-unity/Assets/Spine/Editor/spine-unity/Editor/Utility/Preferences.cs

@@ -176,7 +176,7 @@ namespace Spine.Unity.Editor {
 				newPreferences.atlasTxtImportWarning = EditorPrefs.GetBool(ATLASTXT_WARNING_KEY, SpinePreferences.DEFAULT_ATLASTXT_WARNING);
 				newPreferences.textureImporterWarning = EditorPrefs.GetBool(TEXTUREIMPORTER_WARNING_KEY, SpinePreferences.DEFAULT_TEXTUREIMPORTER_WARNING);
 				newPreferences.timelineUseBlendDuration = EditorPrefs.GetBool(TIMELINE_USE_BLEND_DURATION_KEY, SpinePreferences.DEFAULT_TIMELINE_USE_BLEND_DURATION);
-				newPreferences.handleScale = EditorPrefs.GetBool(SCENE_ICONS_SCALE_KEY, SpinePreferences.DEFAULT_SCENE_ICONS_SCALE);
+				newPreferences.handleScale = EditorPrefs.GetFloat(SCENE_ICONS_SCALE_KEY, SpinePreferences.DEFAULT_SCENE_ICONS_SCALE);
 			}
 
 			public static void SaveToEditorPrefs(SpinePreferences preferences) {
@@ -191,7 +191,7 @@ namespace Spine.Unity.Editor {
 				EditorPrefs.SetBool(ATLASTXT_WARNING_KEY, preferences.atlasTxtImportWarning);
 				EditorPrefs.SetBool(TEXTUREIMPORTER_WARNING_KEY, preferences.textureImporterWarning);
 				EditorPrefs.SetBool(TIMELINE_USE_BLEND_DURATION_KEY, preferences.timelineUseBlendDuration);
-				EditorPrefs.SetBool(SCENE_ICONS_SCALE_KEY, preferences.handleScale);
+				EditorPrefs.SetFloat(SCENE_ICONS_SCALE_KEY, preferences.handleScale);
 			}
 #endif
 

spine-unity/Assets/Spine/Editor/spine-unity/Editor/Windows/SpinePreferences.cs

@@ -86,8 +86,10 @@ namespace Spine.Unity.Editor {
 		public const bool DEFAULT_AUTO_RELOAD_SCENESKELETONS = true;
 		public bool autoReloadSceneSkeletons = DEFAULT_AUTO_RELOAD_SCENESKELETONS;
 
+		public const string SCENE_ICONS_SCALE_KEY = "SPINE_SCENE_ICONS_SCALE";
 		internal const float DEFAULT_SCENE_ICONS_SCALE = 1f;
-		public static float handleScale = DEFAULT_SCENE_ICONS_SCALE;
+		[Range(0.01f, 2f)]
+		public float handleScale = DEFAULT_SCENE_ICONS_SCALE;
 
 		public const bool DEFAULT_MECANIM_EVENT_INCLUDE_FOLDERNAME = true;
 		public bool mecanimEventIncludeFolderName = DEFAULT_MECANIM_EVENT_INCLUDE_FOLDERNAME;
@@ -95,7 +97,7 @@ namespace Spine.Unity.Editor {
 		// Timeline extension module
 		public const bool DEFAULT_TIMELINE_USE_BLEND_DURATION = true;
 		public bool timelineUseBlendDuration = DEFAULT_TIMELINE_USE_BLEND_DURATION;
-
+		
 #if NEW_PREFERENCES_SETTINGS_PROVIDER
 		public static void Load () {
 			GetOrCreateSettings();
@@ -171,10 +173,10 @@ namespace Spine.Unity.Editor {
 				EditorGUILayout.LabelField("Handles and Gizmos", EditorStyles.boldLabel);
 				{
 					EditorGUI.BeginChangeCheck();
-					handleScale = EditorGUILayout.Slider("Editor Bone Scale", handleScale, 0.01f, 2f);
-					handleScale = Mathf.Max(0.01f, handleScale);
+					var scaleProperty = settings.FindProperty("handleScale");
+					EditorGUILayout.PropertyField(scaleProperty, new GUIContent("Editor Bone Scale"));
 					if (EditorGUI.EndChangeCheck()) {
-						EditorPrefs.SetFloat(SpinePreferences.SCENE_ICONS_SCALE_KEY, handleScale);
+						EditorPrefs.SetFloat(SpinePreferences.SCENE_ICONS_SCALE_KEY, scaleProperty.floatValue);
 						SceneView.RepaintAll();
 					}
 				}