104 lines
3.4 KiB
C#
104 lines
3.4 KiB
C#
// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
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using System;
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using System.Collections.Generic;
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using FlaxEditor.Content;
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using FlaxEngine.GUI;
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namespace FlaxEditor.GUI.Drag
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{
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/// <summary>
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/// Script items drag handler.
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/// </summary>
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public sealed class DragScriptItems : DragScriptItems<DragEventArgs>
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="DragScriptItems"/> class.
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/// </summary>
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/// <param name="validateFunction">The validation function</param>
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public DragScriptItems(Func<ScriptItem, bool> validateFunction)
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: base(validateFunction)
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{
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}
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}
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/// <summary>
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/// Helper class for handling <see cref="ScriptItem"/> drag and drop.
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/// </summary>
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/// <seealso cref="ScriptItem" />
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public class DragScriptItems<U> : DragHelper<ScriptItem, U> where U : DragEventArgs
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{
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/// <summary>
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/// The default prefix for drag data used for <see cref="ContentItem"/>.
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/// </summary>
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public const string DragPrefix = DragItems<DragEventArgs>.DragPrefix;
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/// <summary>
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/// Creates a new DragHelper
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/// </summary>
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/// <param name="validateFunction">The validation function</param>
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public DragScriptItems(Func<ScriptItem, bool> validateFunction)
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: base(validateFunction)
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{
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}
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/// <inheritdoc/>
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public override DragData ToDragData(ScriptItem item) => GetDragData(item);
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/// <inheritdoc/>
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public override DragData ToDragData(IEnumerable<ScriptItem> items) => GetDragData(items);
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/// <summary>
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/// Gets the drag data.
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/// </summary>
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/// <param name="item">The item.</param>
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/// <returns>The data.</returns>
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public static DragData GetDragData(ScriptItem item)
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{
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return DragItems<DragEventArgs>.GetDragData(item);
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}
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/// <summary>
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/// Gets the drag data.
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/// </summary>
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/// <param name="items">The items.</param>
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/// <returns>The data.</returns>
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public static DragData GetDragData(IEnumerable<ScriptItem> items)
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{
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return DragItems<DragEventArgs>.GetDragData(items);
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}
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/// <summary>
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/// Tries to parse the drag data.
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/// </summary>
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/// <param name="data">The data.</param>
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/// <returns>
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/// Gathered objects or empty IEnumerable if cannot get any valid.
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/// </returns>
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public override IEnumerable<ScriptItem> FromDragData(DragData data)
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{
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if (data is DragDataText dataText)
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{
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if (dataText.Text.StartsWith(DragPrefix))
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{
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// Remove prefix and parse spitted names
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var paths = dataText.Text.Remove(0, DragPrefix.Length).Split('\n');
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var results = new List<ScriptItem>(paths.Length);
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for (int i = 0; i < paths.Length; i++)
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{
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// Find element
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var obj = Editor.Instance.ContentDatabase.FindScript(paths[i]);
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// Check it
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if (obj != null)
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results.Add(obj);
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}
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return results.ToArray();
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}
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}
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return new ScriptItem[0];
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}
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}
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}
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