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using System.Collections.Generic;
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using UnityEditor;
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using UnityEngine;
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namespace AssetUsageDetectorNamespace
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{
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public abstract class ListDrawer<T>
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{
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private readonly string label;
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private readonly bool acceptSceneObjects;
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protected ListDrawer( string label, bool acceptSceneObjects )
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{
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this.label = label;
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this.acceptSceneObjects = acceptSceneObjects;
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}
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// Exposes a list on GUI
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public bool Draw( List<T> list )
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{
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bool hasChanged = false;
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bool guiEnabled = GUI.enabled;
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Event ev = Event.current;
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GUILayout.BeginHorizontal();
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GUILayout.Label( label );
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if( guiEnabled )
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{
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// Handle drag & drop references to array
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// Credit: https://answers.unity.com/answers/657877/view.html
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if( ( ev.type == EventType.DragPerform || ev.type == EventType.DragUpdated ) && GUILayoutUtility.GetLastRect().Contains( ev.mousePosition ) )
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{
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DragAndDrop.visualMode = DragAndDropVisualMode.Copy;
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if( ev.type == EventType.DragPerform )
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{
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DragAndDrop.AcceptDrag();
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Object[] draggedObjects = DragAndDrop.objectReferences;
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if( draggedObjects.Length > 0 )
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{
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for( int i = 0; i < draggedObjects.Length; i++ )
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{
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if( draggedObjects[i] != null && !draggedObjects[i].Equals( null ) )
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{
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bool replacedNullElement = false;
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for( int j = 0; j < list.Count; j++ )
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{
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if( IsElementNull( list[j] ) )
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{
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list[j] = CreateElement( draggedObjects[i] );
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replacedNullElement = true;
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break;
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}
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}
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if( !replacedNullElement )
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list.Add( CreateElement( draggedObjects[i] ) );
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hasChanged = true;
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}
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}
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}
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}
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ev.Use();
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}
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else if( ev.type == EventType.ContextClick && GUILayoutUtility.GetLastRect().Contains( ev.mousePosition ) )
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{
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GenericMenu contextMenu = new GenericMenu();
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contextMenu.AddItem( new GUIContent( "Clear" ), false, () =>
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{
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list.Clear();
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list.Add( CreateElement( null ) );
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} );
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contextMenu.ShowAsContext();
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ev.Use();
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}
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if( GUILayout.Button( "+", Utilities.GL_WIDTH_25 ) )
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list.Insert( 0, CreateElement( null ) );
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}
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GUILayout.EndHorizontal();
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for( int i = 0; i < list.Count; i++ )
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{
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T element = list[i];
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GUI.changed = false;
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GUILayout.BeginHorizontal();
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Object prevObject = GetObjectFromElement( element );
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Object newObject = EditorGUILayout.ObjectField( "", prevObject, typeof( Object ), acceptSceneObjects );
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if( GUI.changed )
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{
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hasChanged = true;
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SetObjectOfElement( list, i, newObject );
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}
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if( guiEnabled )
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{
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if( GUILayout.Button( "+", Utilities.GL_WIDTH_25 ) )
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list.Insert( i + 1, CreateElement( null ) );
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if( GUILayout.Button( "-", Utilities.GL_WIDTH_25 ) )
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{
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if( element != null && !element.Equals( null ) )
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hasChanged = true;
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// Lists with no elements look ugly, always keep a dummy null variable
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if( list.Count > 1 )
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list.RemoveAt( i-- );
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else
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list[0] = CreateElement( null );
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}
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}
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GUILayout.EndHorizontal();
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PostElementDrawer( element );
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}
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return hasChanged;
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}
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protected abstract T CreateElement( Object source );
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protected abstract Object GetObjectFromElement( T element );
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protected abstract void SetObjectOfElement( List<T> list, int index, Object value );
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protected abstract bool IsElementNull( T element );
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protected abstract void PostElementDrawer( T element );
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}
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public class ObjectListDrawer : ListDrawer<Object>
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{
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public ObjectListDrawer( string label, bool acceptSceneObjects ) : base( label, acceptSceneObjects )
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{
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}
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protected override Object CreateElement( Object source )
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{
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return source;
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}
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protected override Object GetObjectFromElement( Object element )
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{
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return element;
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}
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protected override void SetObjectOfElement( List<Object> list, int index, Object value )
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{
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list[index] = value;
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}
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protected override bool IsElementNull( Object element )
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{
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return element == null || element.Equals( null );
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}
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protected override void PostElementDrawer( Object element )
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{
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}
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}
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public class ObjectToSearchListDrawer : ListDrawer<ObjectToSearch>
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{
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public ObjectToSearchListDrawer() : base( "Find references of:", true )
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{
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}
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protected override ObjectToSearch CreateElement( Object source )
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{
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return new ObjectToSearch( source );
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}
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protected override Object GetObjectFromElement( ObjectToSearch element )
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{
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return element.obj;
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}
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protected override void SetObjectOfElement( List<ObjectToSearch> list, int index, Object value )
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{
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list[index].obj = value;
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list[index].RefreshSubAssets();
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}
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protected override bool IsElementNull( ObjectToSearch element )
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{
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return element == null || element.obj == null || element.obj.Equals( null );
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}
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protected override void PostElementDrawer( ObjectToSearch element )
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{
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List<ObjectToSearch.SubAsset> subAssetsToSearch = element.subAssets;
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if( subAssetsToSearch.Count > 0 )
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{
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GUILayout.BeginHorizontal();
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// 0-> all toggles off, 1-> mixed, 2-> all toggles on
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bool toggleAllSubAssets = subAssetsToSearch[0].shouldSearch;
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bool mixedToggle = false;
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for( int j = 1; j < subAssetsToSearch.Count; j++ )
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{
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if( subAssetsToSearch[j].shouldSearch != toggleAllSubAssets )
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{
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mixedToggle = true;
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break;
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}
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}
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if( mixedToggle )
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EditorGUI.showMixedValue = true;
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GUI.changed = false;
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toggleAllSubAssets = EditorGUILayout.Toggle( toggleAllSubAssets, Utilities.GL_WIDTH_25 );
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if( GUI.changed )
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{
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for( int j = 0; j < subAssetsToSearch.Count; j++ )
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subAssetsToSearch[j].shouldSearch = toggleAllSubAssets;
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}
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EditorGUI.showMixedValue = false;
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element.showSubAssetsFoldout = EditorGUILayout.Foldout( element.showSubAssetsFoldout, "Include sub-assets in search:", true );
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GUILayout.EndHorizontal();
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if( element.showSubAssetsFoldout )
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{
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for( int j = 0; j < subAssetsToSearch.Count; j++ )
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{
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GUILayout.BeginHorizontal();
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subAssetsToSearch[j].shouldSearch = EditorGUILayout.Toggle( subAssetsToSearch[j].shouldSearch, Utilities.GL_WIDTH_25 );
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bool guiEnabled = GUI.enabled;
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GUI.enabled = false;
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EditorGUILayout.ObjectField( string.Empty, subAssetsToSearch[j].subAsset, typeof( Object ), true );
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GUI.enabled = guiEnabled;
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GUILayout.EndHorizontal();
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}
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}
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}
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}
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}
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}
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