Fwd: [Pharo-project] System Window and OB model

[Damien Cassou]

---------- Forwarded message ----------
From: Fernando olivero <oliv...@lu.unisi.ch>
Date: Tue, Aug 18, 2009 at 12:01 PM
Subject: [Pharo-project] System Window and OB model
To: "Pharo-...@lists.gforge.inria.fr Development"
<Pharo-...@lists.gforge.inria.fr>

Quitting  a system/hierarchy browser opened with the ToolSet,  fails
to inform the close to  the model  OB browser .

For example in the following code 1 doesnt get explored

       | window |
       window := ToolSet  browse: Set  selector: anyOne.
       window model announcer observe: OBCloseRequest do:[:ann| 1 explore ].

Did anybody had this problem before? Or solved it already?
Fernando

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Damien Cassou
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"Lambdas are relegated to relative obscurity until Java makes them
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[Colin Putney]

On 20-Aug-09, at 7:16 AM, Damien Cassou wrote:

>
> ---------- Forwarded message ----------
> From: Fernando olivero <oliv...@lu.unisi.ch>
> Date: Tue, Aug 18, 2009 at 12:01 PM
> Subject: [Pharo-project] System Window and OB model
> To: "Pharo-...@lists.gforge.inria.fr Development"
> <Pharo-...@lists.gforge.inria.fr>
>
>
> Quitting a system/hierarchy browser opened with the ToolSet, fails
> to inform the close to the model OB browser .
>
> For example in the following code 1 doesnt get explored
>
> | window |
> window := ToolSet browse: Set selector: anyOne.
> window model announcer observe: OBCloseRequest do:[:ann| 1
> explore ].
>
> Did anybody had this problem before? Or solved it already?
> Fernando

The reference to ToolSet is a red herring; we see the same behavior
with the following test case:

| window |
window := OBSystemBrowser open.

window model announcer observe: OBCloseRequest do:[:ann| 1 explore ].

However, this is expected, because OBCloseRequest is not an
Announcement, it's actually a Notification. It's raised by
OBBrowser>>close, which is not intended to be sent by the windowing
system. Instead, #close should be sent when we want to
programmatically close a browser. For example:

| browser |
browser := OBSystemBrowser new.
browser open.
(Delay forSeconds: 2) wait.
browser close

OBCloseRequest provides an opportunity to intercept the notification
and perform special handling if that's desired. For example:

| browser |
browser := OBSystemBrowser new.
browser open.
(Delay forSeconds: 2) wait.
[browser close]
on: OBCloseRequest
do:
[:request |
1 explore.
request pass]

If you want to intercept the closing of the browser by the user, try
implementing #windowIsClosing. This will get sent by Morphic when the
window is removed from the screen. See OBCodeBrowser>>windowIsClosing
as an example. NB. don't raise an OBCloseRequest from within
#windowIsClosing. That will result in infinite recursion.

Fernando, what are you attempting to do? Does this explanation help?

Colin