[rkward-devel] Importing text/csv plugin modification...

[Thomas Friedrichsmeier]

Hi,

On Tuesday 30 October 2007, Prasenjit Kapat wrote:
> I have been thinking to modify this plugin slightly to provide a
> "quick" mode using read.csv/csv2/delim/delim2. I don't remember who
> had written this initially, anyway I will take some liberty to do the
> following changes:
>
> 1. Quick mode (as described above)
> 2. Combine the Rows and Columns tab into one: a lot of space seems to
> be wasted in there....
> 3. Combine the Strings and Further Options tab: same reason as above..
>
> In this regard, one quick question: (I have gone rusty) Suppose there
> are two radio sections in a plugin. If I remember correctly there is
> no way to set the "option" on one radio based on the "option" of the
> other radio... Am I right?

you can do that, but only in a very limited way. You can connect 
some "governor" to the radios "string" or "number" properties. Now, if the 
governor value matches the value of one of the option, that option will be 
selected.

The problem is, that the governor will most likely be a "convert" logic 
element, and that is limited to the values "true"/"false" (or 0/1, if you use 
the "numeric" modifier). So that's not too useful, when you want to set e.g. 
the third option in a radio.

One way around this would be to allow specification of the string values of 
a "convert" property. However, for now you can only connect a 
single "governor" to each property, so this will not help much, if you need 
to select between several options based on several conditions, either.

Another option would be to add a property "selected" to each option in the 
radio, similar to the property "enabled" that already exists for single 
options (so you can disable some options in a radio). However, what happens, 
if the current option is changed to not selected? Theoretically no option is 
selected, now, and that would make for an invalid choice in the radio. Or 
does it only work one way, i.e. you can set an option to be selected, but not 
to not-selected?

I'm just not sure how to do this, yet. Suggestions (if the above sounds too 
technical, perhaps post some pseudo-plugin-xml, that shows how it could look 
like, and I'll see how this can be implemented)?

> I hope the initial author feels comfortable with this. Kindly, let me
> know you preferences/objections. I will try to incorporate them.

I had to look it up in the SVN logs. This was originally created by Adrien 
Hardemare, and while it has undergone a substantial number of revisions since 
then, the basic layout has remained the same.

On your points 2 and 3, I guess I'll need to see what it looks like when done. 
I'm somewhat afraid that it will not be so easy to find the options of 
interest, anymore. However, I have not really thought this through, and 
layout changes are easy to do and undo, so just go ahead and give it a try.

Regards
Thomas
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