public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
{
EditorGUI.BeginProperty(position, label, property);
position = EditorGUI.PrefixLabel(position, GUIUtility.GetControlID(FocusType.Passive), label);
var indent = EditorGUI.indentLevel;
EditorGUI.indentLevel = 0;
EditorGUI.PropertyField(new Rect(position.x, position.y, 80, position.height), property.FindPropertyRelative("_value"), GUIContent.none);
if (property.FindPropertyRelative("_value").intValue == 0 || GUI.Button(new Rect(position.x + 80, position.y, position.width - 80, position.height), "Next"))
{
property.FindPropertyRelative("_value").intValue = DataId.GetNextId();
}
EditorGUI.indentLevel = indent;
EditorGUI.EndProperty();
}
