Update GUI while JSlider

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From	"Philipp" <philipp@THRWHITE.remove-dii-this>
Subject	Update GUI while JSlider
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Date	Wed, 27 Apr 2011 15:35:23 GMT
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  To: comp.lang.java.gui
Knute Johnson a ocrit :
 >> I want to program a feature where the user moves a JSlider which
 >> after some calculations shows a result in the GUI depending on the
 >> slider's position. It works now fully in the EDT but lags a lot.
 >>
 >> This is because the slider creates continously events and each event
 >> must be calculated and shown.
 >>
 >> What would be the optimal architecture for such a construct. How can
 >> I drop the processing of events if the GUI lags more than a certain
 >> time behind the slider position.

 > You need to take a look at JSlider.getValueIsAdjusting().  With this
 > method you can test in your ChangeListener whether the slider is
 > moving.  If it is, don't bother to update your GUI until it stops.  Or
 > make occaisional updates while it is moving.

I want to update my GUI only when the slider is moving. So your second 
solution, ie. making occasional updates seems adapted.

How could I implement that? Maybe I can just compare the present time to 
the last repaint time and if the differenc is above a value (say 0.1s), 
call a repaint. Is this good design (especially with this hard coded 
value of 0.1 s)?

Phil
PS: Sorry to JT for hijacking his thread...

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Thread

Update GUI while JSlider "Philipp" <philipp@THRWHITE.remove-dii-this> - 2011-04-27 15:35 +0000
  Re: Update GUI while JSli "Andrew Thompson" <andrew.thompson@THRWHITE.remove-dii-this> - 2011-04-27 15:35 +0000
  Re: Update GUI while JSli "Andrew Thompson" <andrew.thompson@THRWHITE.remove-dii-this> - 2011-04-27 15:35 +0000
  Re: Update GUI while JSli "Chris Smith" <chris.smith@THRWHITE.remove-dii-this> - 2011-04-27 15:35 +0000
    Re: Update GUI while JSli "Philipp" <philipp@THRWHITE.remove-dii-this> - 2011-04-27 15:35 +0000

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