Hi all,

currently I am porting those JVCL components which look interesting to me
(https://sourceforge.net/p/lazarus-ccr/svn/HEAD/tree/components/jvcllaz/), but at the moment I am stuck with the component editor of the TJvOutlookBar. This is some kind of two-level vertical menu. The top level is a list of TJvOutlookBarPage items, and each page has a list of TJvOutlookbarButton items as second level. Both lists inherit from TCollection. My problem is that in the component tree of the object inspector I see only the page items, but not the button "sub-items". See attached screen shot of Lazarus and the Delphi version for comparison. How can I make the button subnodes appear in the component tree?

Another problem: The component comes with a ComponentEditor for the entire class, which looks similar to that of a TCollection, but contains a treeview to display the page-button relationships. After some twiddling around I was able to make this work in Lazarus, i.e. when I add nodes to the tree in the component editor the corresponding buttons or pages are added to the control on the form designer; and when I navigate in the component editor's tree the selected object follows in the component tree and in the object inspector. But the opposite direction does not work:  When I add a page or button in the object inspector (by using the Pages and Buttons collection property editors) the tree in the component editor is not updated. How can I do this?

Any hints greatly appreciated.
Werner

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Hi,
 
ad 1: I never tried two level collection. Are they all published (both collections and their items)?  
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  
V.   
 

Vojtěch Čihák wrote

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.

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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I am getting the impression that this is a bug of the component tree. The listed page items inherit from TCollectionItem, not from TComponent. The component tree somehow must be instructed to look for another collection within each page colletionItem.

I was able to solve this based on code I found in unit components/ideintf/fieldseditor. The key point is that handlers for GlobalDesignHook events/notifications must be added. BTW, there is a "GlobalDesignHook" and a "FDesigner.PropertyEditorHook" - are they the same, or: what is the difference?
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[...]there is a "GlobalDesignHook" and a "FDesigner.PropertyEditorHook" - are they the same, or: what is the difference?

They are the same.

Mattias

Werner Pamler wrote

currently I am porting those JVCL components which look interesting to me (https://sourceforge.net/p/lazarus-ccr/svn/HEAD/tree/components/jvcllaz/), but at the moment I am stuck with the component editor of the TJvOutlookBar.

Please test with r57763.

Juha

Juha Manninen wrote

Please test with r57763.

Excellent, works perfectly! Thank you.