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perform URL resource loading inside IElementUpdater.updateElement(UIElement, Map) [message #512748]

Sun, 07 February 2010 02:29

Eclipse User

Hello,

I would like to set the UIElement's icon to a favorite icon loaded from
a remote URL. The javadoc for this method say, that I should not hold
onto UIElement as it can go away any time. But could I spawn a
Dislay.asyncExec to load the image for that UIElement?

Phil

Re: perform URL resource loading inside IElementUpdater.updateElement(UIElement, Map) [message #513004 is a reply to message #512748]

Mon, 08 February 2010 09:42

Eclipse User

Philipp Kursawe wrote:
> Hello,
>
> I would like to set the UIElement's icon to a favorite icon loaded from
> a remote URL. The javadoc for this method say, that I should not hold
> onto UIElement as it can go away any time. But could I spawn a
> Dislay.asyncExec to load the image for that UIElement?

It would be better if you could load the image, and then call
ICommandService.refreshElements(*) for that command in an async as you
would only be handed valid elements.

You can try loading and then setting in an asyncExec(*) but you would
have to protect your call to the UIElement by catching (potentially)
RuntimeExceptions (it's matching widget could be disposed, the UI
element might have cleared enough of its fields that it might NPE, etc).

Later,
PW

--
Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
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http://wiki.eclipse.org/Menus_Extension_Mapping
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