102 lines
3.4 KiB
C#
102 lines
3.4 KiB
C#
// Copyright (c) 2012-2024 Wojciech Figat. All rights reserved.
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using System;
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using System.Collections.Generic;
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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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/// Generic items names collection drag handler.
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/// </summary>
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public sealed class DragNames : DragNames<DragEventArgs>
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="DragNames"/> class.
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/// </summary>
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/// <param name="prefix">The drag data prefix.</param>
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/// <param name="validateFunction">The validation function.</param>
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public DragNames(string prefix, Func<string, bool> validateFunction)
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: base(prefix, 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 generic items names drag and drop.
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/// </summary>
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public class DragNames<U> : DragHelper<string, U> where U : DragEventArgs
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{
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/// <summary>
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/// Gets the drag data prefix.
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/// </summary>
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public string DragPrefix { get; }
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/// <summary>
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/// Creates a new DragHelper
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/// </summary>
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/// <param name="prefix">The drag data prefix.</param>
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/// <param name="validateFunction">The validation function.</param>
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public DragNames(string prefix, Func<string, bool> validateFunction)
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: base(validateFunction)
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{
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DragPrefix = prefix;
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}
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/// <inheritdoc/>
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public override DragData ToDragData(string track) => GetDragData(DragPrefix, track);
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/// <inheritdoc/>
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public override DragData ToDragData(IEnumerable<string> tracks) => GetDragData(DragPrefix, tracks);
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/// <summary>
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/// Gets the drag data.
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/// </summary>
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/// <param name="dragPrefix">The drag dat prefix.</param>
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/// <param name="name">The name.</param>
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/// <returns>The data.</returns>
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public static DragData GetDragData(string dragPrefix, string name)
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{
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if (name == null)
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throw new ArgumentNullException();
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return new DragDataText(dragPrefix + name);
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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="dragPrefix">The drag dat prefix.</param>
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/// <param name="names">The names.</param>
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/// <returns>The data.</returns>
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public static DragData GetDragData(string dragPrefix, IEnumerable<string> names)
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{
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if (names == null)
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throw new ArgumentNullException();
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string text = dragPrefix;
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foreach (var item in names)
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text += item + '\n';
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return new DragDataText(text);
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}
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/// <summary>
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/// Tries to parse the drag data to extract generic items names collection.
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/// </summary>
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/// <param name="data">The data.</param>
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/// <returns>Gathered objects or empty array if cannot get any valid.</returns>
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public override IEnumerable<string> 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 split names
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return dataText.Text.Remove(0, DragPrefix.Length).Split('\n');
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}
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}
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return new string[0];
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}
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}
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}
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