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Java Swing text as a grid?

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  Java Swing text as a grid? rupertlssmith@googlemail.com - 2014-04-22 07:50 -0700
    Re: Java Swing text as a grid? markspace <markspace@nospam.nospam> - 2014-04-22 08:22 -0700
    Re: Java Swing text as a grid? Jeff Higgins <jeff@invalid.invalid> - 2014-04-22 11:45 -0400
      Re: Java Swing text as a grid? Jeff Higgins <jeff@invalid.invalid> - 2014-04-22 15:03 -0400
        Re: Java Swing text as a grid? Rupert Smith <rupertlssmith@googlemail.com> - 2014-04-23 00:56 -0700
    Re: Java Swing text as a grid? Roedy Green <see_website@mindprod.com.invalid> - 2014-04-23 19:49 -0700
      Re: Java Swing text as a grid? Rupert Smith <rupertlssmith@googlemail.com> - 2014-04-25 02:13 -0700
        Re: Java Swing text as a grid? Arne Vajhøj <arne@vajhoej.dk> - 2014-04-28 20:26 -0400

#28180 — Java Swing text as a grid?

Hi,

I'd like a text UI component that lets me place monospaced text within it, using row/column addressing. The built-in text controls are constructed around a Document model, which models text as a single stream (by stream I mean linear buffer of text), with rendered row/column derived from placement of newlines, wrapping strategy, and lots of other things.

The Document model lets you have multiple root 'elements', each of which is a single stream. I'm thinking I could extend and existing text control, perhaps JTextArea, to render one root element per row, and disable all line wrapping. It might make more sense than having to insert newlines into the text stream to control row position.

Does anyone have any thoughts on how to create a simple text grid UI control with Swing? I suppose I should take a look at lanterna, which must be achieving something similar to what I want, when emulating a console under Swing.

Thanks for your input.

Rupert Smith

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#28182

On 4/22/2014 7:50 AM, rupertlssmith@googlemail.com wrote:
> Hi,
>
> I'd like a text UI component that lets me place monospaced text
> within it, using row/column addressing. The built-in text controls


I would just keep a separate structure, an array of lines, and then 
index into that.

public class MyTextArray {

   private JTextArea text = ...
   private ArrayList<String> lines = ...

   public void addText( String line ) {
     lines.add( line );
     text.add( line );
   }

   public char get( int row, int column ) {
     if( row > lines.size() ) throw new IllegalArgumentException();
     String s = lines.get( row );
     if( column >= s.length() ) throw new IllegalArgumentException();
     return s.charAt( column );
   }

}

Flavor to taste.

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#28184

On 04/22/2014 10:50 AM, rupertlssmith@googlemail.com wrote:
> Hi,
>
> I'd like a text UI component that lets me place monospaced text within it, using row/column addressing. The built-in text controls are constructed around a Document model, which models text as a single stream (by stream I mean linear buffer of text), with rendered row/column derived from placement of newlines, wrapping strategy, and lots of other things.
>
> The Document model lets you have multiple root 'elements', each of which is a single stream. I'm thinking I could extend and existing text control, perhaps JTextArea, to render one root element per row, and disable all line wrapping. It might make more sense than having to insert newlines into the text stream to control row position.
>
> Does anyone have any thoughts on how to create a simple text grid UI control with Swing? I suppose I should take a look at lanterna, which must be achieving something similar to what I want, when emulating a console under Swing.
>

javax.swing.text is a big, and to my mind, complex package.
<http://docs.oracle.com/javase/8/docs/api/javax/swing/text/View.html>
Sorry I can't offer concrete suggestions.

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#28187

On 04/22/2014 11:45 AM, Jeff Higgins wrote:
> On 04/22/2014 10:50 AM, rupertlssmith@googlemail.com wrote:
>> Hi,
>>
>> I'd like a text UI component that lets me place monospaced text within
>> it, using row/column addressing. The built-in text controls are
>> constructed around a Document model, which models text as a single
>> stream (by stream I mean linear buffer of text), with rendered
>> row/column derived from placement of newlines, wrapping strategy, and
>> lots of other things.
>>
>> The Document model lets you have multiple root 'elements', each of
>> which is a single stream. I'm thinking I could extend and existing
>> text control, perhaps JTextArea, to render one root element per row,
>> and disable all line wrapping. It might make more sense than having to
>> insert newlines into the text stream to control row position.

The key, I think, to working with the Swing text package is having your
document model well sussed out before considering the views and controller.

>> Does anyone have any thoughts on how to create a simple text grid UI
>> control with Swing? I suppose I should take a look at lanterna, which
>> must be achieving something similar to what I want, when emulating a
>> console under Swing.

You might look at the source of javax.swing.text.PlainView after
you've got your document model completely worked out.

> javax.swing.text is a big, and to my mind, complex package.
> <http://docs.oracle.com/javase/8/docs/api/javax/swing/text/View.html>
> Sorry I can't offer concrete suggestions.
>
>

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#28194

On Tuesday, April 22, 2014 8:03:25 PM UTC+1, Jeff Higgins wrote:
> On 04/22/2014 11:45 AM, Jeff Higgins wrote:
> You might look at the source of javax.swing.text.PlainView after
> you've got your document model completely worked out.

PlainView: The view represents each child element as a line of text.

Sounds like its pretty close to what I'm after, thanks.

> > javax.swing.text is a big, and to my mind, complex package.

Its a beast for sure. 6 chapters in the Swing text book I have, and even that doesn't leave room for the details.

I looked an lanterna and realised that rendering a simple grid of text can be as simple as implementing paintComponent()

for (int i = 0; i < columns; i++) {
  for (int j = 0; j < rows; j++) {
    graphics2d.drawString(characters[j][i], ...

So I think I will keep the model very simple for now, and render that way. I can re-implement on top of text.Document and play around with text.View as and when more capability is required.

Rupert

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#28208

On Tue, 22 Apr 2014 07:50:37 -0700 (PDT), rupertlssmith@googlemail.com
wrote, quoted or indirectly quoted someone who said :

>
>Does anyone have any thoughts on how to create a simple text grid UI contro=
>l with Swing? 

You could just have a GridBag layout of JTextAreas.

Most fun is to do it the way you would in AWT with a Canvas (JPanel in
Swing).  See http://mindprod.com/products1.html#JDISPLAY for sample
code.
-- 
Roedy Green Canadian Mind Products http://mindprod.com
"Don't worry about people stealing an idea; if it's original, you'll
 have to shove it down their throats." 
~ Howard Aiken (born: 1900-03-08 died: 1973-03-14 at age: 73)

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#28224

On Thursday, April 24, 2014 3:49:53 AM UTC+1, Roedy Green wrote:
> >Does anyone have any thoughts on how to create a simple text grid UI 
> >control with Swing? 
> 
> You could just have a GridBag layout of JTextAreas.

I hadn't thought of that. GridLayout I think you mean? with one character per grid cell. Would have been a quick and dirty way to get started.

> Most fun is to do it the way you would in AWT with a Canvas (JPanel in
> Swing).

Looks like that is the route I am taking. :-)

Rupert

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#28306

On 4/25/2014 5:13 AM, Rupert Smith wrote:
> On Thursday, April 24, 2014 3:49:53 AM UTC+1, Roedy Green wrote:
>>> Does anyone have any thoughts on how to create a simple text grid UI
>>> control with Swing?
>>
>> You could just have a GridBag layout of JTextAreas.
>
> I hadn't thought of that. GridLayout I think you mean?

Not necesarrily:

http://docs.oracle.com/javase/7/docs/api/java/awt/GridLayout.html

http://docs.oracle.com/javase/7/docs/api/java/awt/GridBagLayout.html

GridBagLayout is a more flexible version of GridLayout.

Arne

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