Version: 2022.3
LanguageEnglish
  • C#

SearchProvider.fetchDescription

Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

public Func<SearchItem,SearchContext,string> fetchDescription;

Description

Handler to provide an asynchronous description for an item. Is called when the item is about to be displayed. Allows a plugin provider to only fetch long descriptions when they are needed.

[SearchItemProvider]
internal static SearchProvider CreateProvider()
{
    return new SearchProvider("example_tree", "Trees")
    {
        filterId = "tree:",
        priority = 99999, // Put example provider at a low priority
        showDetailsOptions = ShowDetailsOptions.Inspector | ShowDetailsOptions.Actions,
        fetchItems = (context, items, provider) => FetchItems(context, provider),
        fetchThumbnail = (item, context) => AssetDatabase.GetCachedIcon(item.id) as Texture2D,
        fetchPreview = (item, context, size, options) => AssetDatabase.GetCachedIcon(item.id) as Texture2D,
        fetchLabel = (item, context) => AssetDatabase.LoadMainAssetAtPath(item.id).name,
        fetchDescription = (item, context) => AssetDatabase.LoadMainAssetAtPath(item.id).name,
        toObject = (item, type) => AssetDatabase.LoadMainAssetAtPath(item.id),
        trackSelection = TrackSelection,
        startDrag = StartDrag
    };
}

private static IEnumerable<SearchItem> FetchItems(SearchContext context, SearchProvider provider)
{
    if (context.empty)
        yield break;

    // Yield items asynchronously which is the recommended way.
    foreach (var guid in AssetDatabase.FindAssets("t:Prefab tree " + context.searchQuery))
        yield return provider.CreateItem(context, AssetDatabase.GUIDToAssetPath(guid), null, null, null, null);
}

private static void TrackSelection(SearchItem searchItem, SearchContext searchContext)
{
    EditorGUIUtility.PingObject(AssetDatabase.LoadMainAssetAtPath(searchItem.id));
}

private static void StartDrag(SearchItem item, SearchContext context)
{
    if (context.selection.Count > 1)
    {
        var selectedObjects = context.selection.Select(i => AssetDatabase.LoadMainAssetAtPath(i.id));
        var paths = context.selection.Select(i => i.id).ToArray();
        StartDrag(selectedObjects.ToArray(), paths, item.GetLabel(context, true));
    }
    else
        StartDrag(new[] { AssetDatabase.LoadMainAssetAtPath(item.id) }, new[] { item.id }, item.GetLabel(context, true));
}

public static void StartDrag(UnityEngine.Object[] objects, string[] paths, string label = null)
{
    if (paths == null || paths.Length == 0)
        return;
    DragAndDrop.PrepareStartDrag();
    DragAndDrop.objectReferences = objects;
    DragAndDrop.paths = paths;
    DragAndDrop.StartDrag(label);
}