[Lazarus] Component editors and related

[Werner Pamler]

Am 25.04.2018 um 20:40 schrieb Vojtěch Čihák via Lazarus:
>
> ad 1: I never tried two level collection. Are they all published (both 
> collections and their items)?
>

Yes. And both collections are accessible in the object inspector: The 
JvOutlookBar has a property "Pages", the ellipsis button next to it 
opens the usual collection property editor which can be used to add, 
delete or rearrange pages. And when one of the pages is selected the 
object inspector displays the property "Buttons", again with an ellipsis 
button to open another collection property editor, now for the buttons. 
This part is working out of the box. The problem is the component tree 
which only shows the page nodes but no button nodes.

> ad 2: You can do (in your component editor) something like:
>
> var aHook: TPropertyEditorHook;
>
> begin
>
>   ...
>
>   aHook:=nil;
>
>       if not GetHook(aHook) then exit;
>
>   ...
>
>   //add or insert:
>
> AddedItem:=aComponent.Columns.Add;
>
> aHook.PersistentAdded(AddedItem, True);  //this notifies component tree
>
> aHook.SelectOnlyThis(AddedItem);   //this selects added object
>
>   //deleting
>
>    DeletedItem:=aComponent.Columns[aIndex];
>
>  aHook.DeletePersistent(TPersistent(DeletedItem)); //this notifies 
> component tree
>

This is for notification of the component tree by the component editor 
and this code is already there and working. What I want is notification 
of the component editor by the designer if pages or buttons are added 
while the component editor is open (the component editor is not modal).

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