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

Groups > comp.lang.java.programmer > #38598

Re: Displaying a ragged array

Show all headers | View raw

On 2018-09-17 21:32, Martin Gregorie wrote:
> On Mon, 17 Sep 2018 16:00:03 +0200, Daniele Futtorovic wrote:
> 
>> I think you should compose, rather than inherit that (i.e. a
>> DatastoreTableModel layer).
>>
> Why? 

The old "favour composition over inheritance" thing. Your Datastore is
not a TableModel, it's a Datastore. E.g. it might get populated by other
sub-components. Why should those have to interact with a TableModel
that's none of their business?

> Yes, missing elements will always be at the end. They are distinct from 
> empty elements, which are represented by empty Strings. Missing elements 
> are off the end of the ArrayList, i.e. get(n) would throw an 
> IndexOutOfBoundsException if asked to fetch them. Datastore returns null 
> and sets an error (testable with hasError()) if you try it.

(A quick size() check might be preferable to throwing an Exception)

>> A _display_ problem I would address at the _rendering_ level, rather
>> than the model level. That is, using the TableCellRenderer and
>> TableCellEditor.
>>
> The app is an editor for manipulating CSV files with embedded comment 
> lines. Yes, I know that yoy can use a spreadsheet, but they can and do 
> mess with fields that they think need special treatment, e.g. dates.
> 
> One problem I see with using a JTable is that, while a comment line can 
> be handled as a line containing one field, it would be would be best 
> treated as a complete line, because its width should not affect the first 
> column width, i.e. the displayed width of the first fields on other lines.

I can see two options.
One would be to display comments separately, in a dedicated UI
component, when a specific data row is selected. This assumes that
comment lines "belong" to a specific data row.
The other would be to use a JTreeTable. I'd love to get you a link for
that, but that Oracle's Java site is so goddamn fucking useless I
haven't been able to find the relevant article. I think it was somewhere
in the Swing tutorials.

-- 
DF.

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

Thread

Displaying a ragged array Martin Gregorie <martin@mydomain.invalid> - 2018-09-16 22:17 +0000
  Re: Displaying a ragged array Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2018-09-17 16:00 +0200
    Re: Displaying a ragged array Martin Gregorie <martin@mydomain.invalid> - 2018-09-17 19:32 +0000
      Re: Displaying a ragged array Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2018-09-17 23:29 +0200
        Re: Displaying a ragged array Martin Gregorie <martin@mydomain.invalid> - 2018-09-17 23:43 +0000
          Re: Displaying a ragged array Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2018-09-19 18:12 +0200
            Re: Displaying a ragged array Martin Gregorie <martin@mydomain.invalid> - 2018-09-19 17:49 +0000
              Re: Displaying a ragged array Eric Sosman <esosman@comcast-dot-net.invalid> - 2018-09-19 14:25 -0400
                Re: Displaying a ragged array Martin Gregorie <martin@mydomain.invalid> - 2018-09-19 19:29 +0000
                Re: Displaying a ragged array Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2018-09-20 15:30 +0200
                Re: Displaying a ragged array Martin Gregorie <martin@mydomain.invalid> - 2018-09-20 15:06 +0000
              Re: Displaying a ragged array Eric Douglas <e.d.programmer@gmail.com> - 2018-09-24 08:11 -0700
                Re: Displaying a ragged array Martin Gregorie <martin@mydomain.invalid> - 2018-09-24 17:52 +0000
                Re: Displaying a ragged array Eric Douglas <e.d.programmer@gmail.com> - 2018-09-24 12:01 -0700
                Re: Displaying a ragged array Martin Gregorie <martin@mydomain.invalid> - 2018-10-23 21:00 +0000
  Re: Displaying a ragged array Eric Sosman <esosman@comcast-dot-net.invalid> - 2018-09-17 10:17 -0400
    Re: Displaying a ragged array Martin Gregorie <martin@mydomain.invalid> - 2018-09-17 19:46 +0000
      Re: Displaying a ragged array Martin Gregorie <martin@mydomain.invalid> - 2018-09-17 23:53 +0000

csiph-web