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LayerField.cs
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LayerField.cs
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// Unity C# reference source
// Copyright (c) Unity Technologies. For terms of use, see
// https://unity3d.com/legal/licenses/Unity_Reference_Only_License
using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UIElements;
using UnityEditorInternal;
namespace UnityEditor.UIElements
{
/// <summary>
/// A LayerField editor. For more information, refer to [[wiki:UIE-uxml-element-LayerField|UXML element LayerField]].
/// </summary>
public class LayerField : PopupField<int>
{
[UnityEngine.Internal.ExcludeFromDocs, Serializable]
public new class UxmlSerializedData : PopupField<int>.UxmlSerializedData
{
#pragma warning disable 649
[UxmlAttribute("value")]
[SerializeField, LayerDecorator] int layer;
[SerializeField, UxmlIgnore, HideInInspector] UxmlAttributeFlags layer_UxmlAttributeFlags;
#pragma warning restore 649
public override object CreateInstance() => new LayerField();
public override void Deserialize(object obj)
{
base.Deserialize(obj);
if (ShouldWriteAttributeValue(layer_UxmlAttributeFlags))
{
var e = (LayerField)obj;
e.SetValueWithoutNotify(layer);
}
}
}
/// <summary>
/// Instantiates a <see cref="LayerField"/> using the data read from a UXML file.
/// </summary>
[Obsolete("UxmlFactory is deprecated and will be removed. Use UxmlElementAttribute instead.", false)]
public new class UxmlFactory : UxmlFactory<LayerField, UxmlTraits> {}
/// <summary>
/// Defines <see cref="UxmlTraits"/> for the <see cref="LayerField"/>.
/// </summary>
[Obsolete("UxmlTraits is deprecated and will be removed. Use UxmlElementAttribute instead.", false)]
public new class UxmlTraits : PopupField<int>.UxmlTraits
{
UxmlIntAttributeDescription m_Value = new UxmlIntAttributeDescription { name = "value" };
/// <summary>
/// Initialize the traits.
/// </summary>
/// <param name="ve">VisualElement that will be created and populated.</param>
/// <param name="bag">Bag of attributes where the data comes from.</param>
/// <param name="cc">Creation context, unused.</param>
public override void Init(VisualElement ve, IUxmlAttributes bag, CreationContext cc)
{
base.Init(ve, bag, cc);
var lf = (LayerField)ve;
lf.SetValueWithoutNotify(m_Value.GetValueFromBag(bag, cc));
}
}
internal int layer { get => value; set => this.value = value; }
internal override string GetValueToDisplay()
{
return InternalEditorUtility.GetLayerName(rawValue);
}
public override int value
{
get { return base.value; }
set
{
if (m_Choices.Contains(value))
{
base.value = value;
}
}
}
/// <summary>
/// Unsupported.
/// </summary>
public override Func<int, string> formatSelectedValueCallback
{
get { return null; }
set
{
if (value != null)
{
Debug.LogWarning(L10n.Tr("LayerField doesn't support the formatting of the selected value."));
}
m_FormatSelectedValueCallback = null;
}
}
/// <summary>
/// Unsupported.
/// </summary>
public override Func<int, string> formatListItemCallback
{
get { return null; }
set
{
if (value != null)
{
Debug.LogWarning(L10n.Tr("LayerField doesn't support the formatting of the list items."));
}
m_FormatListItemCallback = null;
}
}
public override void SetValueWithoutNotify(int newValue)
{
if (m_Choices.Contains(newValue))
{
base.SetValueWithoutNotify(newValue);
}
}
static List<int> InitializeLayers()
{
var listOfIndex = new List<int>();
for (var i = 0; i < 32; i++)
{
if (InternalEditorUtility.GetLayerName(i).Length != 0)
{
listOfIndex.Add(i);
}
}
return listOfIndex;
}
/// <summary>
/// USS class name of elements of this type.
/// </summary>
public new static readonly string ussClassName = "unity-layer-field";
/// <summary>
/// USS class name of labels in elements of this type.
/// </summary>
public new static readonly string labelUssClassName = ussClassName + "__label";
/// <summary>
/// USS class name of input elements in elements of this type.
/// </summary>
public new static readonly string inputUssClassName = ussClassName + "__input";
/// <summary>
/// Initializes and returns an instance of LayerField.
/// </summary>
/// <param name="label">The text to use as a label for the field.</param>
public LayerField(string label)
: base(label, InitializeLayers(), 0)
{
AddToClassList(ussClassName);
labelElement.AddToClassList(labelUssClassName);
visualInput.AddToClassList(inputUssClassName);
SetValueWithoutNotify(0);
}
/// <summary>
/// Initializes and returns an instance of LayerField.
/// </summary>
public LayerField()
: this(null) {}
/// <summary>
/// Initializes and returns an instance of LayerField.
/// </summary>
/// <param name="defaultValue">The initial layer value this field should use.</param>
public LayerField(int defaultValue)
: this(null, defaultValue)
{
SetValueWithoutNotify(defaultValue);
}
/// <summary>
/// Initializes and returns an instance of LayerField.
/// </summary>
/// <param name="label">The text to use as a label for the field.</param>
/// <param name="defaultValue">The initial layer value this field should use.</param>
public LayerField(string label, int defaultValue)
: this(label)
{
SetValueWithoutNotify(defaultValue);
}
internal override void AddMenuItems(IGenericMenu menu)
{
if (menu == null)
{
throw new ArgumentNullException(nameof(menu));
}
choices = InitializeLayers();
string[] layerList = InternalEditorUtility.GetLayersWithId();
for (var i = 0; i < layerList.Length; i++)
{
var item = layerList[i];
var menuItemIndex = m_Choices[i];
var isSelected = (menuItemIndex == value) && !showMixedValue;
menu.AddItem(item, isSelected, () => ChangeValueFromMenu(menuItemIndex));
}
menu.AddSeparator(String.Empty);
menu.AddItem(L10n.Tr("Add Layer..."), false, OpenLayerInspector);
}
void ChangeValueFromMenu(int menuItemIndex)
{
value = menuItemIndex;
}
static void OpenLayerInspector()
{
TagManagerInspector.ShowWithInitialExpansion(TagManagerInspector.InitialExpansionState.Layers);
}
}
}