Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #24851

Re: JSlider interactions

Show all headers | View raw

In article <81940cb0-8687-40f5-8eda-68bf8c8ff935@googlegroups.com>,
 FredK <fred.l.kleinschmidt@gmail.com> wrote:

> Is there a way to set the block increment for a JSlider ? By this I 
> mean the change in value that occurs when the user clicks between the 
> current position and one of the ends (similar to the block or unit 
> increment for a JScrollBar). I can't find anything to do this in 
> JScrollBar or BoundedRangeModel.
> 
> Or is it a UI-specific amount (I am using Nimbus).
> 
> For an integer slider, I want to drag the knob to the approximate 
> position, and then be able to click near it to move one integer at a 
> time. It appears that the default amount is 10% of the range, so when 
> the range is from 0 to 40, clicking in the "trough" area moves the 
> value by 4.

This handled by an instance of BasicSliderUI.TrackListener, for which 
you'll need a custom UI delegate, as shown here,

<http://stackoverflow.com/a/518672/230513>

and in How to Write a Custom Swing Component:

<https://today.java.net/pub/a/today/2007/02/22/how-to-write-custom-swing-component.html>

Interestingly, BasicSliderUI.ScrollListener is public, apparently to 
work around an IE bug.

As an aside, the API for each says.

  Instantiate it only within subclasses of .

while the source says,

  Instantiate it only within subclasses of <Foo>.

-- 
John B. Matthews
trashgod at gmail dot com
<http://sites.google.com/site/drjohnbmatthews>

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

JSlider interactions FredK <fred.l.kleinschmidt@gmail.com> - 2013-07-30 14:24 -0700
  Re: JSlider interactions "John B. Matthews" <nospam@nospam.invalid> - 2013-07-30 21:57 -0400
    Re: JSlider interactions FredK <fred.l.kleinschmidt@gmail.com> - 2013-07-31 10:34 -0700
      Re: JSlider interactions "John B. Matthews" <nospam@nospam.invalid> - 2013-08-01 17:50 -0400

csiph-web