Groups > comp.lang.java.programmer > #4231

Re: Aligned elements in a JComboBox

Path	csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!news.albasani.net!news2.arglkargh.de!news.n-ix.net!news.belwue.de!not-for-mail
From	Thomas Richter <thor@math.tu-berlin.de>
Newsgroups	comp.lang.java.programmer
Subject	Re: Aligned elements in a JComboBox
Date	Tue, 17 May 2011 21:41:23 +0200
Organization	InterNetNews at News.BelWue.DE (Stuttgart, Germany)
Lines	57
Message-ID	<iquj14$f38$1@news.belwue.de> (permalink)
References	<iqu8i1$ks3$1@news.belwue.de> <JGxAp.4755$iv4.3479@newsfe09.iad>
NNTP-Posting-Host	vpn-m-8d3a2f3a.campus.uni-stuttgart.de
Mime-Version	1.0
Content-Type	text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding	7bit
X-Trace	news.belwue.de 1305661284 15464 141.58.47.58 (17 May 2011 19:41:24 GMT)
X-Complaints-To	news@news.belwue.de
NNTP-Posting-Date	Tue, 17 May 2011 19:41:24 +0000 (UTC)
User-Agent	Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.16) Gecko/20110307 Icedove/3.0.11
In-Reply-To	<JGxAp.4755$iv4.3479@newsfe09.iad>
Xref	x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:4231

Show key headers only | View raw

On 17.05.2011 18:49, Knute Johnson wrote:
> On 05/17/2011 09:42 AM, Thomas Richter wrote:
>> Hi folks,
>>
>> the problem at hand is how to align individual components that are part
>> of a JComboBox.
>>
>> The JComboBox uses a custom Renderer to render its contents, and each
>> content consists of two strings of variable size, arranged in a JPanel.
>> The getListCellRendererComponent() of the renderer now returns the
>> JPanel containing the two components.
>>
>> So far, so good. This works.
>>
>> The problem is that the sizes of the two components differ througout the
>> items of the JComboBox, which means that the elements within the JList
>> in the JCombobox (or rather, its JList rendering the non-editable items)
>> are not aligned to each other. Of course they can't, they are individual
>> JPanels each with its own layout manager, and thus do not know anything
>> on each other.
>>
>> Needless to say, this looks visually very unattractive.
>>
>> So what can I do about this? I have a JComboBox with a very complex
>> layout and the requirement that each entry necessarily is a pair of data
>> types of various sizes. How can I make the elements be aware of each
>> other and have a common layout for all of them?
>>
>> Illustration:
>>
>> +----------------------------------------------+
>> | foofoo | barbarbarbarbarbarbarbar |
>> +----------------------------------------------+
>> | foofoofoofoofoofoofoo | bar |
>> +----------------------------------------------+
>>
>> This is how the JComboBox currently renders. But I want it
>> laid out such that the separator between the two elements forming one
>> entry of it are underneath each other.
>>
>> Any ideas?
>>
>> Greetings,
>> Thomas
>
> Figure out the largest size of your data in each field and lay out all
> the elements with the same width and layout manager.

Which layout manager accepts fixed widths for its components? If I use a 
GridBagLayout, for example, changing the dimension of the components 
within changes their alignment, and thus they'll move around even though 
the layout manager stays the same.

Greetings,
	Thomas

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

Thread

Aligned elements in a JComboBox Thomas Richter <thor@math.tu-berlin.de> - 2011-05-17 18:42 +0200
  Re: Aligned elements in a JComboBox Knute Johnson <nospam@knutejohnson.com> - 2011-05-17 09:49 -0700
    Re: Aligned elements in a JComboBox Thomas Richter <thor@math.tu-berlin.de> - 2011-05-17 21:41 +0200
      Re: Aligned elements in a JComboBox Knute Johnson <nospam@knutejohnson.com> - 2011-05-17 18:00 -0700
        Re: Aligned elements in a JComboBox Bent C Dalager <bcd@pvv.ntnu.no> - 2011-05-18 09:13 +0000
          Re: Aligned elements in a JComboBox "John B. Matthews" <nospam@nospam.invalid> - 2011-05-18 07:56 -0400
  Re: Aligned elements in a JComboBox Roedy Green <see_website@mindprod.com.invalid> - 2011-05-19 10:29 -0700

csiph-web