On Sun, May 20, 2012 at 12:59 PM, Chris Muller <asqueaker at gmail.com> wrote:

> That field is used to get focus back to where you were.
>
>   - editing in a code-pane somewhere..
>   - press Control+1 to invoke the Squeak menu.
>   - press ESC because I changed my mind.
>   - focus is back to where I was without ever having touched the mouse.
>
> There are several places where the system latches on to objects
> unexpectedly like this.
>
> Normal usage of the system can't know whether its referencing a
> "large" object.  If you are feeling annoyed by presence of large
> objects, then I think that should be addressed by a separate use-case
> -- an explicit cleanUp operation.
>

That's what I'm suggesting.  IMO, when a morph is deleted from the world
then the places that could hold onto it should be notified and drop their
references.


>
>
>
> On Sun, May 20, 2012 at 12:06 PM, Eliot Miranda <eliot.miranda at gmail.com>
> wrote:
> > Hi All,
> >
> >    through a combination of the windows menu and oldKeyboardFocus and
> > oldMouseFocus the DockingBarMorph holds onto closed windows.  Repeat by
> e.g.
> >
> > - inspect a new instance of some class that has no instances (ZeroDivide
> > works for me).
> >
> > - Click on the Windows menu to populate it (it should include the
> ZeroDivide
> > inspector).
> >
> > - Close the inspector, run the GC (e.g. ask for space left).
> >
> > - Then check the class's instance count (ZeroDivide instanceCount).
>  Should
> > be non-zero.
> >
> > - Inspect the instance (ZeroDivide allInstances inspect) and do chase
> > pointers and you'll get a reference back through the DockingBarMorph:
> >
> > globals: SystemDictionary
> > #World -> PasteUpMorph
> > submorphs: Array
> > 2: DockingBarMorph
> > oldKeyboardFocus: TextMorphForEditView
> > editView: PluggableTextMorphPlus
> > model: Inspector
> > object: ZeroDivide
> >
> > - To clear, open the WIndows menu again (which now doesn't show the
> closed
> > inspector) and run GC.  Now check instanceCount and it is back to zero.
> >
> > This is annoying because it can hold onto large objects.  I guess when
> > morphs are deleted from the world they ought to clear themselves from the
> > DockingBarMorph.  But I'm a bit nervous about making such a change, and
> > hence thought I'd run it by the list first.
> > --
> > best,
> > Eliot
> >
> >
> >
> >
>
>


-- 
best,
Eliot
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