127 lines
4.0 KiB
C#
127 lines
4.0 KiB
C#
// Copyright (c) 2012-2023 Wojciech Figat. All rights reserved.
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using FlaxEditor.Content;
|
|
using FlaxEngine.GUI;
|
|
|
|
namespace FlaxEditor.GUI.Drag
|
|
{
|
|
/// <summary>
|
|
/// Drag content items handler.
|
|
/// </summary>
|
|
public sealed class DragItems : DragItems<DragEventArgs>
|
|
{
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="DragItems"/> class.
|
|
/// </summary>
|
|
/// <param name="validateFunction">The validation function</param>
|
|
public DragItems(Func<ContentItem, bool> validateFunction)
|
|
: base(validateFunction)
|
|
{
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Helper class for handling <see cref="ContentItem"/> drag and drop.
|
|
/// </summary>
|
|
/// <seealso cref="ContentItem" />
|
|
public class DragItems<U> : DragHelper<ContentItem, U> where U : DragEventArgs
|
|
{
|
|
/// <summary>
|
|
/// The default prefix for drag data used for <see cref="ContentItem"/>.
|
|
/// </summary>
|
|
public const string DragPrefix = "ASSET!?";
|
|
|
|
/// <summary>
|
|
/// Creates a new DragHelper
|
|
/// </summary>
|
|
/// <param name="validateFunction">The validation function</param>
|
|
public DragItems(Func<ContentItem, bool> validateFunction)
|
|
: base(validateFunction)
|
|
{
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the drag data for the given file.
|
|
/// </summary>
|
|
/// <param name="path">The path.</param>
|
|
/// <returns>The data.</returns>
|
|
public DragData ToDragData(string path) => GetDragData(path);
|
|
|
|
/// <inheritdoc/>
|
|
public override DragData ToDragData(ContentItem item) => GetDragData(item);
|
|
|
|
/// <inheritdoc/>
|
|
public override DragData ToDragData(IEnumerable<ContentItem> items) => GetDragData(items);
|
|
|
|
/// <summary>
|
|
/// Gets the drag data.
|
|
/// </summary>
|
|
/// <param name="path">The path.</param>
|
|
/// <returns>The data.</returns>
|
|
public static DragData GetDragData(string path)
|
|
{
|
|
if (path == null)
|
|
throw new ArgumentNullException();
|
|
|
|
return new DragDataText(DragPrefix + path);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the drag data.
|
|
/// </summary>
|
|
/// <param name="item">The item.</param>
|
|
/// <returns>The data.</returns>
|
|
public static DragDataText GetDragData(ContentItem item)
|
|
{
|
|
if (item == null)
|
|
throw new ArgumentNullException();
|
|
|
|
return new DragDataText(DragPrefix + item.Path);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the drag data.
|
|
/// </summary>
|
|
/// <param name="items">The items.</param>
|
|
/// <returns>The data.</returns>
|
|
public static DragData GetDragData(IEnumerable<ContentItem> items)
|
|
{
|
|
if (items == null)
|
|
throw new ArgumentNullException();
|
|
|
|
string text = DragPrefix;
|
|
foreach (var item in items)
|
|
text += item.Path + '\n';
|
|
return new DragDataText(text);
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public override IEnumerable<ContentItem> FromDragData(DragData data)
|
|
{
|
|
if (data is DragDataText dataText)
|
|
{
|
|
if (dataText.Text.StartsWith(DragPrefix))
|
|
{
|
|
// Remove prefix and parse spitted names
|
|
var paths = dataText.Text.Remove(0, DragPrefix.Length).Split('\n');
|
|
var results = new List<ContentItem>(paths.Length);
|
|
for (int i = 0; i < paths.Length; i++)
|
|
{
|
|
// Find element
|
|
var obj = Editor.Instance.ContentDatabase.Find(paths[i]);
|
|
|
|
// Check it
|
|
if (obj != null)
|
|
results.Add(obj);
|
|
}
|
|
|
|
return results.ToArray();
|
|
}
|
|
}
|
|
return new ContentItem[0];
|
|
}
|
|
}
|
|
}
|