Re: Field update loop problem

"Daniel Pitts" <>
12 Jan 2007 11:49:31 -0800
Stephen wrote:

I was wondering if anyone can suggest an elegant/simple way to solve this
problem in my SWT application. Obviously I could use some sort of "brute
force" method, but I would rather not.

I have a number of Text fields, and they each have a field modify listener
attached (this fires when text is modified in field). e.g.

sumInsuredText = new Text(this, SWT.BORDER);
 public void modifyText( e)
  //.. do stuff ..
  //.. do other stuff ..

Unfortunately, refresh view updates the field too (it has to, as the purpose
of the method is to update the contents in all the fields). This creates an
infinite loop, as the initial modification triggers modifyText(), which
called refreshView(), which triggers modifyText() etc.

I need refreshView() to be called each time the field is updated - without
causing an infinite loop. I'm not bothered whether this is on leaving the
field (would probably prefer this actually) or whether it's when the text is

I guess this is a fairly common problem, and I wonder if anyone has any
tried and tested solutions?

I would think that your best solution is to only trigger refreshView if
the old value differs from the new value. I don't know about SWT, so
I'm not sure how you would implement this.

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