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Using Comet to push PNG files?

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John Chludzinski

Using Comet to push PNG files?

I'm trying to push PNG files as part of a "presentation app". I tried looking at CTCounter and using #update: as an example to follow. The method CTCounter>>update: sends the message SUElement>>update:. The instance of WAImageTag in my app that I'm trying to update (with a new PNG file) is given an id (by senting the message #id:). Using this id I tried to update the image:

    self pusher javascript: [ :script |
        script element
            id: 'WWW';
            update: (MMAFileLibrary / self getCurrentPageFile) asString]. "An instance of WAUrl."

This failed. Tried using SUElement>>replace:

    self pusher javascript: [ :script |
        script element
            id: 'WWW';
            replace: (html image url: MMAFileLibrary / self getCurrentPageFile)]. "An instance of WAImageTag ."

This resulted in the string 'a WAImageTag' being pushed to other browsers.

Any ideas?

---John

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santiago robles

Re: Using Comet to push PNG files?

Hello, I tested this and it worked.

    html image id: 'lala';
        url: SUAllTestLibrary / #logoGif.

    html anchor onClick: (html element id: 'lala';
            replace: [:render | render image id: 'lala';
                    url: SUAllTestLibrary / #demoGif]);
        with: 'change'.

So I suppose that your error is that you didn't use a block to render the new image.
Hope that helps
Santiago

2009/5/21 John Chludzinski <[hidden email]>

I'm trying to push PNG files as part of a "presentation app". I tried looking at CTCounter and using #update: as an example to follow. The method CTCounter>>update: sends the message SUElement>>update:. The instance of WAImageTag in my app that I'm trying to update (with a new PNG file) is given an id (by senting the message #id:). Using this id I tried to update the image:

    self pusher javascript: [ :script |
        script element
            id: 'WWW';
            update: (MMAFileLibrary / self getCurrentPageFile) asString]. "An instance of WAUrl."

This failed. Tried using SUElement>>replace:

    self pusher javascript: [ :script |
        script element
            id: 'WWW';
            replace: (html image url: MMAFileLibrary / self getCurrentPageFile)]. "An instance of WAImageTag ."

This resulted in the string 'a WAImageTag' being pushed to other browsers.

Any ideas?

---John

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seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

_______________________________________________
seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

John Chludzinski

Re: Using Comet to push PNG files?

In reply to this post by John Chludzinski

Exactly! Works fine! I knew I wanted to invoke an action but didn't know I could pass a block closure as an argument to #replace: . THANKS! ---John

On Thu, May 21, 2009 at 11:13 AM, John Chludzinski <[hidden email]> wrote:

I'm trying to push PNG files as part of a "presentation app". I tried looking at CTCounter and using #update: as an example to follow. The method CTCounter>>update: sends the message SUElement>>update:. The instance of WAImageTag in my app that I'm trying to update (with a new PNG file) is given an id (by senting the message #id:). Using this id I tried to update the image:

    self pusher javascript: [ :script |
        script element
            id: 'WWW';
            update: (MMAFileLibrary / self getCurrentPageFile) asString]. "An instance of WAUrl."

This failed. Tried using SUElement>>replace:

    self pusher javascript: [ :script |
        script element
            id: 'WWW';
            replace: (html image url: MMAFileLibrary / self getCurrentPageFile)]. "An instance of WAImageTag ."

This resulted in the string 'a WAImageTag' being pushed to other browsers.

Any ideas?

---John

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seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside