public override void DrawProperty(SerializedProperty property)
{
EditorDrawUtility.DrawHeader(property);
DropdownAttribute dropdownAttribute = PropertyUtility.GetAttribute <DropdownAttribute>(property);
UnityEngine.Object target = PropertyUtility.GetTargetObject(property);
FieldInfo fieldInfo = ReflectionUtility.GetField(target, property.name);
FieldInfo valuesFieldInfo = ReflectionUtility.GetField(target, dropdownAttribute.ValuesFieldName);
if (valuesFieldInfo == null)
{
this.DrawWarningBox(string.Format("{0} cannot find a values field with name \"{1}\"", dropdownAttribute.GetType().Name, dropdownAttribute.ValuesFieldName));
EditorGUILayout.PropertyField(property, true);
}
else if (valuesFieldInfo.GetValue(target) is IList &&
fieldInfo.FieldType == this.GetElementType(valuesFieldInfo))
{
// Selected value
object selectedValue = fieldInfo.GetValue(target);
// Values and display options
IList valuesList = (IList)valuesFieldInfo.GetValue(target);
object[] values = new object[valuesList.Count];
string[] displayOptions = new string[valuesList.Count];
for (int i = 0; i < values.Length; i++)
{
object value = valuesList[i];
values[i] = value;
displayOptions[i] = value.ToString();
}
// Selected value index
int selectedValueIndex = Array.IndexOf(values, selectedValue);
if (selectedValueIndex < 0)
{
selectedValueIndex = 0;
}
// Draw the dropdown
this.DrawDropdown(target, fieldInfo, property.displayName, selectedValueIndex, values, displayOptions);
}
else if (valuesFieldInfo.GetValue(target) is IDropdownList)
{
// Current value
object selectedValue = fieldInfo.GetValue(target);
// Current value index, values and display options
IDropdownList dropdown = (IDropdownList)valuesFieldInfo.GetValue(target);
IEnumerator <KeyValuePair <string, object> > dropdownEnumerator = dropdown.GetEnumerator();
int index = -1;
int selectedValueIndex = -1;
List <object> values = new List <object>();
List <string> displayOptions = new List <string>();
while (dropdownEnumerator.MoveNext())
{
index++;
KeyValuePair <string, object> current = dropdownEnumerator.Current;
if (current.Value.Equals(selectedValue))
{
selectedValueIndex = index;
}
values.Add(current.Value);
displayOptions.Add(current.Key);
}
if (selectedValueIndex < 0)
{
selectedValueIndex = 0;
}
// Draw the dropdown
this.DrawDropdown(target, fieldInfo, property.displayName, selectedValueIndex, values.ToArray(), displayOptions.ToArray());
}
else
{
this.DrawWarningBox(typeof(DropdownAttribute).Name + " works only when the type of the field is equal to the element type of the array");
EditorGUILayout.PropertyField(property, true);
}
}
public static T[] GetAttributes <T>(SerializedProperty property) where T : Attribute
{
FieldInfo fieldInfo = ReflectionUtility.GetField(GetTargetObject(property), property.name);
return((T[])fieldInfo.GetCustomAttributes(typeof(T), true));
}