Displaying rows of data, PluggableMultiColumnListMorph

Hello,

i want to display the results of an ongoing calculation. I'm not terribly concerned about speed, as this is just for educational purposes.
So i figured that PluggableMultiColumnListMorph would be a good place to start.
My problem now is, that it only wants to take Arrays as its source list. Because i don't know how many rows of data need to be displayed, i just threw all of them in an OrderedCollection.
If i convert this OrderedCollection with "asArray" and feed it to the MultiColoumnMorph the contents are displayed just fine, but i can't select any entries or navigate using the arrow keys.
In fact, i can only select as much entries as there are columns in the Morph.

To illustrate, i did something roughly similiar to the following:

|column1 column2|
    result := OrderedCollection new.
    column1 := OrderedCollection new.
    column2 := OrderedCollection new.
    column1 add: 'x-component'; add: 'purz'; add: 'durst'; add: 'puh'.
    column2 add: 'y-component'; add: 'purz1'; add: 'durst1'; add: 'puh1'.
    result add: (column1 asArray); add: (column2 asArray).
    result := result asArray.

And it seems like PluggableMultiColumnListMorph doesn't treat "result" as a proper array.
Is there a possible workaround or do i absolutely have to work with simple arrays?
Or is there an even better way to display rows and columns of data?

Thanks in advance,
Peter Schneider

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On Fri, Oct 12, 2007 at 06:56:55PM +0200, Peter Schneider wrote:
I don't understand how this hooks up to
PluggableMultiColumnListMorph. Is this the getListSelector code?
Looking at the class comment, it says getListSelector should
return an OrderedCollection of Arrays, where each Array is a
row. You seem to be doing something in column-major order, so I
don't really see how this code is supposed to work

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Matthew Fulmer -- http://mtfulmer.wordpress.com/
Help improve Squeak Documentation: http://wiki.squeak.org/squeak/808
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Yes, thats the getListSelector stuff.

Basically i just tried the PluggableMorphsDemo.pr, which you can download here: http://lists.squeakfoundation.org/pipermail/beginners/2006-May/000259.html (file  should end in .pr instead of .obj.)

The ListDemo2 doesn't work as expected. The getListSelector is feed the following Array:
self collection: #(
        "items in the first column"
        #('1a' '2a' '3a' '4a' '5a')
       
        "items in the second column"
        #('1b' '2b' '3b' '4b' '5b')
    ).

So i figured that order would be correct, at least in principle.
Now the there are two columns and four rows displayed with that data in PluggableMultiColumnListMorph.
But i can only select the first two rows.

Changing the the array like this:
self collection: #(
        #('1a' '2a' '3a' '4a' '5a')
        #('1b' '2b' '3b' '4b' '5b')
       #('1c' '2c' '3c' '4bc'  '5c')
    ).

Produces 3 columns and 4 rows. I can now select 3 rows.
I can't really see what i am doing wrong there.

I'm using the Squeak-dev 3.10 Image.

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