Is there a DataObjectChanging like event?

Hi Imre,

There isn't a pre-change event just yet, but we will add a RootItemChanging event for the next version.  Thanks for the suggestion.

Was this ever added to the roadmap and completed?  I am ugrading from 16 - 18 now to use the new grid and lost the selection items changed to have the old and new DataObjects and still don't see an event like this.

Hi Wiley,

We did added it but after doing some testing with another customer, we found it wasn't helpful since by the time the RootItemChanging event fired, the new item was already assigned. 

What specifically were you looking to track, the old selected item?

Correct I need access to the old and the new.  The previous property grid used the selected items changed even which supplied both so I can hook up some of my specialty event tracking and didn't see anything in the new version with a similar event.

Hi Wiley,

Quite a memory test, but from what I remember, we had to handle capturing the prop grid state before updating the DataObject property, and best effort re-apply state after the set.

I have seen another solution where proxy object is used for the data object, which has the advantage of reducing some flicker when changing objects, but in that solution the properties in data objects were flat, and the property shape of the objects were the same.

Hi Wiley,

I believe the SelectionChanged event (defined on the base TreeListBox class) does pass a SelectionChangedEventArgs that specifies removed and added items.  In the case of PropertyGrid, those items will be data models like IPropertyModel.

SelectionChanged event is now fired when the actual selection changes in a property grid, clicking on different properties in the grid.  Before this event was fired when the SelectedObjects changed which is now be changed to DataObjects in the new grid.  I have a work-around in place using the OnItemsSourceChanged override but it is hacky and was just wondering if the question asked in this inital post had been addressed yet.

Hi Wiley,

The SelectionChanged event should still be getting fired as new DataObjects are set, even in the new PropertyGrid.  

We don't yet have anything built-in for the original question.  We have a TODO list item for that and I've added your request to it.

Hello Actipro,

after 4 years, is already there a built-in solution for the original question? if yes, in which version?

Thx!

Hello,

We had started a code branch a while back to persist state but never completed it.  I assume you are switching PropertyGrid.DataObject(s) here and simply want to keep the same general expansion/selection/scroll state after the switch?

How would you like this feature, if added, to be enabled API-wise?

Hello, my question is related to the thread https://www.actiprosoftware.com/community/thread/25865/category-name-translation#120642
As it seems too much expansive to re-template the Grid, I am looking for another way how to update the Category name using the Display attribute and then setting the categoryModel.DisplayName when language and/or DataObject(s) changes (even a cleaner solution should be the XAML approach in the another thread):

            foreach (DataModelBase item in cpg.Items)
            {
                if (!(item is CategoryModel cm)) continue;

                cm.DisplayName = TranslationManager.Instance.Translate(cm.Name);
            }

Procam,

We replied to you in the other thread with another programmatic way to achieve this.