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[Databinding] use for SWTObservables.observe(Text) [message #493255]

Fri, 23 October 2009 23:11

Will Horn

Messages: 265
Registered: July 2009

Senior Member

I noticed that you now (as of 1.3) can call SWTObservables.observe(text) for
a Text widget. This misled me into thinking that I could use it as a
replacement for the more verbose SWTObservables.observe(text, SWT.Modify)
that I *always* use to bind to a text widget. But in fact, the one
parameter method doesn't do what I would expect and no change events get
fired. What is it's purpose? I can see that a stale event gets fired on
SWT.Modify, but when would I bind to a Text widget stale event?

Thanks,
Will

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Re: [Databinding] use for SWTObservables.observe(Text) [message #493547 is a reply to message #493255]

Mon, 26 October 2009 18:19

Matthew Hall

Messages: 368
Registered: July 2009

Senior Member

Will Horn wrote:
> I noticed that you now (as of 1.3) can call SWTObservables.observe(text)
> for a Text widget. This misled me into thinking that I could use it as
> a replacement for the more verbose SWTObservables.observe(text,
> SWT.Modify) that I *always* use to bind to a text widget. But in fact,
> the one parameter method doesn't do what I would expect and no change
> events get fired. What is it's purpose? I can see that a stale event
> gets fired on SWT.Modify, but when would I bind to a Text widget stale
> event?
>
> Thanks,
> Will

SWTObservables.observeText(textWidget) is equivalent to
SWTObservables.observeText(textWidget, SWT.NONE).

Matthew

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Re: [Databinding] use for SWTObservables.observe(Text) [message #493559 is a reply to message #493547]

Mon, 26 October 2009 21:53

Will Horn

Messages: 265
Registered: July 2009

Senior Member

"Matthew Hall" <matthall@woodcraftmill.com> wrote in message
news:hc4p8g$8mg$1@build.eclipse.org...
> Will Horn wrote:
>> I noticed that you now (as of 1.3) can call SWTObservables.observe(text)
>> for a Text widget. This misled me into thinking that I could use it as a
>> replacement for the more verbose SWTObservables.observe(text, SWT.Modify)
>> that I *always* use to bind to a text widget. But in fact, the one
>> parameter method doesn't do what I would expect and no change events get
>> fired. What is it's purpose? I can see that a stale event gets fired on
>> SWT.Modify, but when would I bind to a Text widget stale event?
> SWTObservables.observeText(textWidget) is equivalent to
> SWTObservables.observeText(textWidget, SWT.NONE).
What is the use case for that?

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