Events and Tree like collections :: Would love to hear you opinion!

[Sasha]

Hi everyone,

Here is my problem:

I have the following classes:
- DataNode - this class is designed to hold some data and will be contained
in a tree like data structure DataTree. When DataNode is changed, it raises
"Changed" event. The class has a reference to the DataNode it is being
contained in:
- DataTree - tree like data structure that contains DataNodes; When
DataNodes are inserted, deleted or reodered, DataTree raises the following
events: Inserted, Deleted, Reodered. It also listens to Changed event of the
DataNodes it contains. DataTree subscribes to the Changed events of the
DataNodes when they are added.
- DataTreeCollection - contains multiple DataTrees. It also subscribes to
DataTrees' events

So as you can see, DataTreeCollection ends up with the following events
- DataNode's Changed
- DataTree's Inserted, Removed, Reodered

This way in my application I have to listen to only one instance of
DataTreeCollection, but I still can listen to all events, because all the
players propagate their events to their owners. But a negative side to this
is that the parent of all children will have to have all possible events of
his children...

What do you think about a design like this?
I wonder, if there is better way to do this:

I would love to hear some suggestions or critique
Thank you in advance,
Sasha

[Jeffrey Tan[MSFT]]

Hi Sasha,

I found that this post has been posted in serveral groups.
I will reply to you in microsoft.public.dotnet.languages.csharp, please
follow up there.
Thanks for your understanding.

Best regards,
Jeffrey Tan
Microsoft Online Partner Support
Get Secure! - www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.

--------------------
| From: "Sasha" <[e-mail]>
| Subject: Events and Tree like collections :: Would love to hear you
opinion!
| Date: Wed, 5 Nov 2003 17:47:42 -0800
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|
| Hi everyone,
|
| Here is my problem:
|
| I have the following classes:
| - DataNode - this class is designed to hold some data and will be
contained
| in a tree like data structure DataTree. When DataNode is changed, it
raises
| "Changed" event. The class has a reference to the DataNode it is being
| contained in:
| - DataTree - tree like data structure that contains DataNodes; When
| DataNodes are inserted, deleted or reodered, DataTree raises the following
| events: Inserted, Deleted, Reodered. It also listens to Changed event of
the
| DataNodes it contains. DataTree subscribes to the Changed events of the
| DataNodes when they are added.
| - DataTreeCollection - contains multiple DataTrees. It also subscribes to
| DataTrees' events
|
| So as you can see, DataTreeCollection ends up with the following events
| - DataNode's Changed
| - DataTree's Inserted, Removed, Reodered
|
| This way in my application I have to listen to only one instance of
| DataTreeCollection, but I still can listen to all events, because all the
| players propagate their events to their owners. But a negative side to
this
| is that the parent of all children will have to have all possible events
of
| his children...
|
| What do you think about a design like this?
| I wonder, if there is better way to do this:
|
| I would love to hear some suggestions or critique
|
|
| Thank you in advance,
| Sasha
|
|
|