Re: libseed-list question on window.get_size and out arguments

[Jacob Beard <jbeard4 cs mcgill ca>]

Hi,

Thanks for the replies. I'm still getting the following error with
your code: GInvokeError Too few "out" arguments (handling out)

This is on Ubuntu 10.04 using Seed from apt (version 2.28.1-1). I
guess this is probably due to it being an older version. Would it be
worth filing a bug in Launchpad?

Jake

On Wed, Oct 13, 2010 at 2:25 PM, Alan Knowles <alan akbkhome com> wrote:
> This should get you started.
> http://www.roojs.com/seed/Gtk.Window.html#.get_size
>
> the mapping to C 'out' arguments works in a number of ways (partly due to backward compatibility issues)
>
> a) Original
> - if you put a object where the out argument goes, it will set argument.value to the return value.
> eg. x = {};  w.get_size(x,y)  -- x.value and y.value should be set.
>
> b) the first 'out' argument has it's properties set based on the names of the arguments
> eg. x = {}; w.get_size(x) - x.width, x.height should be set.
>
> c) if the method has no return argument an object is returned with the properties based on the names of the arguments.
> eg. x = w.get_size() - x.width and x.height should be set.
>
> Code below works.
> ----------------
>
>
> Gtk = imports.gi.Gtk;
> Gtk.init(null,null  );
> w = new Gtk.Window();
>
> w.signal.show.connect(function(wx) {
> print("SHOW");
>    print(w.get_size().width);
>    print(w.get_size().height);
> });
> w.show();
> Gtk.main();
>
>
> Regards
> Alan
>
>  --- On 13/Oct/2010, Jacob Beard wrote:
>> Hi,
>>
>> I've just started using Seed for development. One thing that Seed's
>> web page mentions is that it "Maps C-isms (say, out arguments, or
>> enums) to things that make sense in JavaScript." Unfortunately, I
>> can't find any documentation or examples for how out arguments should
>> work. So, for example, the following call in Seed:
>>
>> window.get_size()
>>
>> Will return the error "GInvokeError Too few "out" arguments (handling out)"
>>
>> In C, the call would be expressed by passing in two out arguments:
>>
>> gtk_window_get_size(GTK_WINDOW(widget), &width, &height);
>>
>> I've tried various permutations on the JavaScript call without
>> success. I've also looked at the documentation and sample code, but
>> haven't found any demonstrations of out arguments.
>>
>> I have also asked this question on stackoverflow:
>> http://stackoverflow.com/questions/3916909/how-are-out-parameters-represented-for-seed-javascript-gobject-bindings/3916961#3916961
>>
>> I'd appreciate any insight anyone can offer into how this call should
>> work under the Seed bindings. Thanks,
>>
>> Jake
>> _______________________________________________
>> libseed-list mailing list
>> libseed-list gnome org
>> http://mail.gnome.org/mailman/listinfo/libseed-list
>
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>