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Groups > comp.lang.java.gui > #1793
| From | "Philipp" <philipp@THRWHITE.remove-dii-this> |
|---|---|
| Subject | Update GUI while JSlider |
| Message-ID | <1181544065_2266@sicinfo3.epfl.ch> (permalink) |
| Newsgroups | comp.lang.java.gui |
| Date | 2011-04-27 15:35 +0000 |
| Organization | TDS.net |
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... --- * Synchronet * The Whitehouse BBS --- whitehouse.hulds.com --- check it out free usenet! --- Synchronet 3.15a-Win32 NewsLink 1.92 Time Warp of the Future BBS - telnet://time.synchro.net:24
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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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