[Factor-talk] Namespaces and the UI
Hey gang, I'm trying to get logging to work from my GUI application. I tried the obvious, which is: dystopian [ … open-window ] with-logging However, it seems that the UI window and gadgets all run in a new dynamic scope, and so the `logging-service` variable is unset and all logging calls silently fail. I worked around it for now by subclassing `world`: TUPLE: dystopian-world world ; M: dystopian-world begin-world ( world -- ) drop dystopian log-service set ; However, this is the second time I've gotten bitten by this namespace issue, and it's really tricky to debug. I've been up and down and around the ui and the ui.backend vocabs, and I can't find any place that either creates a new thread or calls `init-namespaces` directly. And yet, every time, my UI code runs in a new namespace. Is this a UI backend implementation detail? Why (and where) does this new namespace and/or thread get created? best, - Fred. -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
Re: [Factor-talk] db.tuples and boolean types
How do you select-tuples from a db with a slot set to f? The help says
that A SQL query is constructed from the slots of the exemplar tuple
that are not f. So for example the following won't work:
[ T{ book { sold f } } select-tuples ] with-books-db
Do you have to use two slots, sold and unsold, and select T{ book {
unsold t } }? Is there some other way that still lets you use
select-tuples?
I haven't tried this, but you might try passing a value that will get
converted to FALSE at the database level, for example:
[ T{ book { sold 0 } } select-tuples ] with-books-db
best,
- Fred.
--
EditLive Enterprise is the world's most technically advanced content
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Editing and ensure content is compliant with Accessibility Checking.
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Re: [Factor-talk] Namespaces and the UI
Is this a UI backend implementation detail? Why (and where) does this new namespace and/or thread get created? I would guess that it's the start-ui-thread word from ui.private ? Regarding your namespace problem, is it ok to use global variables ? Jon -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
Re: [Factor-talk] db.tuples and boolean types
I tried this and it seems that 0 is treated as t. I guess because 0 is
not f. I think I might have to use an INTEGER instead of a BOOLEAN
type and that way I can select for 0 and 1.
Thanks.
On 14 June 2011 16:15, Fred Alger f...@fredalger.net wrote:
I haven't tried this, but you might try passing a value that will get
converted to FALSE at the database level, for example:
[ T{ book { sold 0 } } select-tuples ] with-books-db
--
EditLive Enterprise is the world's most technically advanced content
authoring tool. Experience the power of Track Changes, Inline Image
Editing and ensure content is compliant with Accessibility Checking.
http://p.sf.net/sfu/ephox-dev2dev
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Re: [Factor-talk] Namespaces and the UI
On Tue, Jun 14, 2011 at 11:52 AM, Jon Harper jon.harpe...@gmail.com wrote: Is this a UI backend implementation detail? Why (and where) does this new namespace and/or thread get created? I would guess that it's the start-ui-thread word from ui.private ? Aha, cool, I didn't find that. So when I open a window from the listener, any quots, such as button actions, will run in that namespace. I suppose that in a deployed application I could wrap the `[ ] with-ui` call with a call to `with-logging`, but I can't do that from the listener. Regarding your namespace problem, is it ok to use global variables ? Actually, no, because while these get set at the bottom of the listener's namestack, the UI thread starts up (or has already started) with an empty namestack and will never see the global variables. Same problem, different scope. Hmm, so wait, that means that the graphical listener runs in a different thread than the UI… yep, a quick check of `threads.` confirms that. I'm fine with putting this kind of setup into `begin-world` for now. I'm just wondering if there's a better way to handle this, as it'd handy to be able to set a bunch of variables before handing things off to the GUI. best, - Fred. -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
