[PD] got jump-on-click arrays working

Jonathan Wilkes jancsika at yahoo.com
Wed May 15 21:46:16 CEST 2013

On 05/15/2013 02:42 PM, João Pais wrote:
>> That's actually a big problem, because it means the only people 
>> testing my changes are people who already know how to compile Pd on 
>> their platform AND have the free time (and interest) to test the 
>> changes I make.  It would be much better if everyone who can run Pd 
>> can also test out the changes I make.
>> I should probably tackle this problem before delving into the rest of 
>> my goals.  Is anyone cross-compiling for Windows using the Debian 
>> packages for mingw?  That would make it possible to post binaries for 
>> windows and linux using a single Debian box.
> I mean I don't know how to test them. But if it's only necessary to 
> compile pd, maybe that's already written somewhere? Or is there a "how 
> to test new changes" page?

There is something on puredata.info about compiling Pd-extended using 
either cygwin or mingw (can't remember which).  It's pretty difficult if 
you've never done it before.

Compiling Pd- vanilla should be easier.  Still, it'd be better if I just 
post a zip of the binaries for the revisions.  All that would require is 
a user to download, unzip, then click on the "Pd" executable, which 
means any user that can double click an icon can test the changes.

>>> But I would suggest something else, in case it's somehow related:
>>> - "change" message coming out the [struct] (or [plot]?) for data 
>>> structure arrays, that output the pointer and index for the element 
>>> in question. Then it's possible to link user interaction with arrays 
>>> as well
>> So which [struct] gets the "change" message: the one with the array 
>> and [plot] drawing instruction, or the [struct] that is the template 
>> for the array (i.e., the one with the "y" field that's actually being 
>> changed)?
> I would say the one with the array (and not [plot]). But I'm a surface 
> user, I don't know what's happening inside.
> A con for the template struct: if this template is used also for 
> individual scalars (which doesn't happen often anyway), it might get 
> messy. So maybe better think of high level.

Well, there are two "parent widgets" that can receive a click-- the plot 
trace itself (currently, the black line that represents the array 
elements) and, if there is a drawing instruction for the scalar 
elements, that particular drawing instruction like [fillepolygon].  I 
guess to keep it simple the scalar element's [struct] should always 
receive the notification-- even if it doesn't have a drawing 
instruction, it's "y" field is the one getting changed.  The [struct] 
containing the array definition should only receive a notification for 
things like adding or deleting elements with the mouse-- that is, for 
manipulations that change the structure of the array itself.  (Although 
even there it would be nice for the scalar element's [struct] to receive 
a message that one of its scalars died.)  Complicated stuff.


> João

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