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104 行
3.3 KiB

using System;
using System.Collections.Generic;
using System.Reflection;
using UnityEngine;
using UnityEditor.Graphing;
using UnityEngine.Experimental.UIElements;
using UnityEditor.Experimental.UIElements;
namespace UnityEditor.ShaderGraph.Drawing.Controls
{
[AttributeUsage(AttributeTargets.Property)]
public class ChannelEnumControlAttribute : Attribute, IControlAttribute
{
string m_Label;
int m_SlotId;
public ChannelEnumControlAttribute(string label = null, int slotId = 0)
{
m_Label = label;
m_SlotId = slotId;
}
public VisualElement InstantiateControl(AbstractMaterialNode node, PropertyInfo propertyInfo)
{
return new ChannelEnumControlView(m_Label, m_SlotId, node, propertyInfo);
}
}
public class ChannelEnumControlView : VisualElement, INodeModificationListener
{
AbstractMaterialNode m_Node;
PropertyInfo m_PropertyInfo;
int m_SlotId;
PopupField<string> m_PopupField;
string[] m_ValueNames;
int m_PreviousChannelCount = -1;
public ChannelEnumControlView(string label, int slotId, AbstractMaterialNode node, PropertyInfo propertyInfo)
{
AddStyleSheetPath("Styles/Controls/ChannelEnumControlView");
m_Node = node;
m_PropertyInfo = propertyInfo;
m_SlotId = slotId;
if (!propertyInfo.PropertyType.IsEnum)
throw new ArgumentException("Property must be an enum.", "propertyInfo");
Add(new Label(label ?? ObjectNames.NicifyVariableName(propertyInfo.Name)));
var value = (Enum)m_PropertyInfo.GetValue(m_Node, null);
m_ValueNames = Enum.GetNames(value.GetType());
CreatePopup();
}
void OnValueChanged(ChangeEvent<string> evt)
{
var index = m_PopupField.index;
var value = (int)m_PropertyInfo.GetValue(m_Node, null);
if (!index.Equals(value))
{
m_Node.owner.owner.RegisterCompleteObjectUndo("Change " + m_Node.name);
m_PropertyInfo.SetValue(m_Node, index, null);
}
CreatePopup();
}
public void OnNodeModified(ModificationScope scope)
{
if (scope == ModificationScope.Node)
{
CreatePopup();
m_PopupField.MarkDirtyRepaint();
}
}
void CreatePopup()
{
int channelCount = SlotValueHelper.GetChannelCount(m_Node.FindSlot<MaterialSlot>(m_SlotId).concreteValueType);
if(m_PopupField != null)
{
if(channelCount == m_PreviousChannelCount)
return;
Remove(m_PopupField);
}
m_PreviousChannelCount = channelCount;
List<string> popupEntries = new List<string>();
for (int i = 0; i < channelCount; i++)
popupEntries.Add(m_ValueNames[i]);
var value = (int)m_PropertyInfo.GetValue(m_Node, null);
if(value >= channelCount)
value = 0;
m_PopupField = new PopupField<string>(popupEntries, value);
m_PopupField.OnValueChanged(OnValueChanged);
Add(m_PopupField);
}
}
}