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ListSelectionListener Res

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  ListSelectionListener Res "Hal Vaughan" <hal.vaughan@THRWHITE.remove-dii-this> - 2011-04-27 15:36 +0000
    Re: ListSelectionListener "Jeff Higgins" <jeff.higgins@THRWHITE.remove-dii-this> - 2011-04-27 15:36 +0000
      Re: ListSelectionListener "Hal Vaughan" <hal.vaughan@THRWHITE.remove-dii-this> - 2011-04-27 15:37 +0000
        Re: ListSelectionListener "Hal Vaughan" <hal.vaughan@THRWHITE.remove-dii-this> - 2011-04-27 15:37 +0000
        Re: ListSelectionListener "Jeff Higgins" <jeff.higgins@THRWHITE.remove-dii-this> - 2011-04-27 15:37 +0000
    Re: ListSelectionListener "Roedy Green" <roedy.green@THRWHITE.remove-dii-this> - 2011-04-27 15:36 +0000

#2065 — ListSelectionListener Res

  To: comp.lang.java.gui
This seems quite different than the issue I had with an ActionListener
responding twice (it was added twice).  I've even checked to make sure this
list box has only one ListSelectionListener.

I have a JList that allows multiple interval selection and the
ListSelectionListener is called when I press the mouse button down and when
I release it.  Somewhere along the way, I also get a third event.  I added
a line to the start of the valueChanged() method and it prints once when I
press down on the left mouse button and twice more when I let the button
up.

I can't find anything in the ListSelectionEvent that lets me check to see if
the event is from a mouse button down or up or a mouse click and I haven't
found a reference to this happening.  I haven't had this problem before, so
I could see how it's related to allowing multiple intervals, but I'm still
not clear on what is going on.

Why am I getting multiple ListSelectionEvents and what do I do if all I want
is one so I can then get the selected indices from the list?

Thanks!

Hal

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#2066 — Re: ListSelectionListener

  To: comp.lang.java.gui

Hal Vaughan wrote:
> Why am I getting multiple ListSelectionEvents and what do I do if all I 
> want
> is one so I can then get the selected indices from the list?
>

I may be way off base, if so please disregard. ..or throw me out !-)
<http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4323107>

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#2068 — Re: ListSelectionListener

  To: comp.lang.java.gui
Jeff Higgins wrote:

> 
> Hal Vaughan wrote:
>> Why am I getting multiple ListSelectionEvents and what do I do if all I
>> want
>> is one so I can then get the selected indices from the list?
>>
> 
> I may be way off base, if so please disregard. ..or throw me out !-)
> <http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4323107>

That seems to apply.  I can follow most of that, but they discuss using
DefaultListSelectionModel to see if the value is adjusting or not.  I can't
see how to get DefaultListSelectionModel from my JList.  Am I missing
something obvious?

How can I check to see if it is adjusting or not?

Hal

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#2069 — Re: ListSelectionListener

  To: comp.lang.java.gui
Hal Vaughan wrote:

> Jeff Higgins wrote:
> 
>> 
>> Hal Vaughan wrote:
>>> Why am I getting multiple ListSelectionEvents and what do I do if all I
>>> want
>>> is one so I can then get the selected indices from the list?
>>>
>> 
>> I may be way off base, if so please disregard. ..or throw me out !-)
>> <http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4323107>
> 
> That seems to apply.  I can follow most of that, but they discuss using
> DefaultListSelectionModel to see if the value is adjusting or not.  I
> can't
> see how to get DefaultListSelectionModel from my JList.  Am I missing
> something obvious?
> 
> How can I check to see if it is adjusting or not?
> 
> Hal

Okay, got it.  For some reason the ListSelectionEvent.getValueIsAdjusting()
method wasn't coming up in my prompt in Eclipse.  It's all working okay
now.

Hal

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#2070 — Re: ListSelectionListener

  To: comp.lang.java.gui

"Hal Vaughan" <hal@thresholddigital.com> wrote in message 
news:nridndFhse0fSwbbnZ2dnUVZ_vLinZ2d@comcast.com...
> Jeff Higgins wrote:
>
>>
>> Hal Vaughan wrote:
>>> Why am I getting multiple ListSelectionEvents and what do I do if all I
>>> want
>>> is one so I can then get the selected indices from the list?
>>>
>>
>> I may be way off base, if so please disregard. ..or throw me out !-)
>> <http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4323107>
>
> That seems to apply.  I can follow most of that, but they discuss using
> DefaultListSelectionModel to see if the value is adjusting or not.  I 
> can't
> see how to get DefaultListSelectionModel from my JList.  Am I missing
> something obvious?
>
> How can I check to see if it is adjusting or not?
>

You can use .getSelectionModel on the JList, but I think they are saying
to check the value of ListSelectionEvent.getValueIsAdjusting in your
valueChanged(ListSelectionEvent e) method.

Not absolutely certain on this one.
JH

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#2067 — Re: ListSelectionListener

  To: comp.lang.java.gui
On Mon, 16 Jul 2007 15:42:50 -0400, Hal Vaughan
<hal@thresholddigital.com> wrote, quoted or indirectly quoted someone
who said :

>I can't find anything in the ListSelectionEvent that lets me check to see if
>the event is from a mouse button down or up or a mouse click and I haven't
>found a reference to this happening.  I haven't had this problem before, so
>I could see how it's related to allowing multiple intervals, but I'm still
>not clear on what is going on.

try dumping 

ListSelectionEvent.getValueIsAdjusting() 
          Returns whether or not this is one in a series of multiple
events, where changes are still being made.


see if that helps you figure out what is going on.
-- 
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com

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