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List:       ms-atl
Subject:    Re: namespace extension
From:       "Anderson, Alan" <Alan.Anderson () GBR ! XEROX ! COM>
Date:       2001-04-30 13:32:13
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Thanks Tim

I found the problem with SHChangeNotify - I was creating a pidl relative to
the desktop, where I should have just used the pidl passed into
IPersistFolder::Initialize (guess there are some differences).

I've still to test my tree D&D

thanks
Alan

-----Original Message-----
From: Tim Tabor [mailto:tltabor@EARTHLINK.NET]
Sent: 29 April 2001 15:20
To: ATL@DISCUSS.MICROSOFT.COM
Subject: Re: namespace extension


Hi again, Alan.

> -----Original Message-----
> From: ATL - Active Template Library [mailto:ATL@DISCUSS.MICROSOFT.COM]On
> Behalf Of Anderson, Alan

> 1.what additional interfaces do I need to implement on my IShellFolder
> object for drag and drop? I've got this working in the folder
> view, but not
> the tree view.
>

At a minimum, you need to implement IDropTarget,
and return the pointer to the shell when it
calls your IShellFolder::GetUIObjectOf with
IID_IDropTarget.

You'll also need to return the appropriate
attributes when the shell calls your
IShellFolder::GetAttributesOf.  The drop
source needs to return some combination of
   SFGAO_CANCOPY
   SFGAO_CANMOVE
   SFGAO_CANLINK
And the drop target needs to return
   SFGAO_DROPTARGET

> 2.If I change or add an item in the folder view which is also in the tree
> view, how do I refresh the tree to reflect the changes?
>

Call SHChangeNotify with SHCNF_IDLIST for the uFlags and
absolute pidls for the dwItems.

You can use my ShellSpy to see how the shell does it for its
own objects:
http://www.cheztabor.com/ShellSpy/

// tim

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