/// <summary>
/// Displays the popup.
/// </summary>
/// <param name="position">Position.</param>
/// <param name="property">Property.</param>
/// <param name="label">Label.</param>
protected virtual void DisplayPopup(Rect position, SerializedProperty property, GUIContent label)
{
FieldInfo field;
object provider = property.GetProvider(out field);
string key = property.propertyPath;
if (!m_PopupData.ContainsKey(key))
{
m_PopupData[key] = new PopupData();
}
PopupData popupData = m_PopupData[key];
// initialize the contents getter method
if (popupData.GetContentsCallback == null)
{
MethodInfo method =
provider.GetType().GetInstanceMethod(this.Attribute.PopupContentsGetter, s_ContentsGetterParams);
if (method != null)
{
popupData.GetContentsCallback = System.Delegate.CreateDelegate(
typeof(PopupAttribute.GetPopupContentsCallback), provider, method
) as PopupAttribute.GetPopupContentsCallback;
}
}
// if method cannot be found, display error icon
if (popupData.GetContentsCallback == null)
{
EditorGUIX.DisplayPropertyFieldWithStatus(
position,
property,
ValidationStatus.Error,
label,
true,
string.Format(
"Unabled to find method: int {0}.{1} (List<GUIContent> labels, List<object> values)",
provider.GetType(), this.Attribute.PopupContentsGetter
)
);
return;
}
else if (
property.propertyType == SerializedPropertyType.Generic ||
property.propertyType == SerializedPropertyType.Gradient
)
{
EditorGUIX.DisplayPropertyFieldWithStatus(
position,
property,
ValidationStatus.Error,
label,
true,
string.Format(
"SerializedPropertyType.{0} not supported for popup drawer.", property.propertyType
)
);
return;
}
EditorGUI.BeginProperty(position, label, property);
{
int index = popupData.GetContentsCallback(popupData.Labels, popupData.Values);
EditorGUI.BeginChangeCheck();
{
index = EditorGUI.Popup(position, label, index, popupData.Labels.ToArray());
}
if (EditorGUI.EndChangeCheck() && index > -1 && index < popupData.Values.Count)
{
property.SetValue(popupData.Values[index]);
popupData.GetContentsCallback = null;
}
}
EditorGUI.EndProperty();
}
