BitfieldPropertyDrawer

BitfieldPropertyDrawer.cs

using UnityEngine;
using UnityEditor;
using System.Collections;

[CustomPropertyDrawer(typeof(BitfieldPropertyAttribute))]
public class BitfieldPropertyDrawer : PropertyDrawer
{
	public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
	{
		EditorGUI.BeginProperty(position, label, property);
		
		GUIStyle style = "Button";

		int bitfield = property.intValue;
		int newBitfield = 0;
		int bitWidth = 7;
		int bitHeight = (int)position.height / 2;

		EditorGUI.PrefixLabel(position, label);
		int positionAfterPrefix = (int)(position.x + EditorGUIUtility.labelWidth);
		int intFieldWidth = 60;

		EditorGUI.LabelField(new Rect(positionAfterPrefix, position.y, intFieldWidth, position.height), bitfield.ToString("X8"));

		for(int i = 0; i < 32; ++i)
		{
			Rect rect = new Rect(positionAfterPrefix + intFieldWidth + 4 + (bitWidth - 1) * (i % 16),
			                     position.y + (bitHeight - 1) * (i / 16),
			                     bitWidth, bitHeight);

			int mask = 1 << (31 - i);
			newBitfield |= (GUI.Toggle(rect, (bitfield & mask) != 0, GUIContent.none, style) ? mask : 0);
		}

		property.intValue = newBitfield;
		EditorGUI.EndProperty();
	}
/*
	public override float GetPropertyHeight (SerializedProperty property, GUIContent label)
	{
		return base.GetPropertyHeight(property, label);
	}
*/
}