[Gambas-user] Using command line arguments in GUI applications

[B Bruen]

Here's a slightly modified version of Tobi's demo showing most (?) of the features of the Args processor with comments.

hth

Bruce
On Thu, 21 Aug 2014 01:07:28 +0200
Tobias Boege <taboege at ...626...> wrote:

> On Wed, 20 Aug 2014, Geoffrey De Belie wrote:
> > 
> > Op 19-08-14 om 21:28 schreef Tobias Boege:
> > >On Tue, 19 Aug 2014, Geoffrey De Belie wrote:
> > >>Hi,
> > >>
> > >>After reading the documentation at http://gambasdoc.org/help/comp/gb.args/args/has?v3 I'm not sure how to use command line arguments in Gambas. Can you explain it to me?
> > >>
> > >>1) Is it possible to pass command line arguments to my GUI application? If so, how?
> > >>2) How can I define command line arguments (options) like --execute, -e or --replace, -r?
> > >>
> > >Does the attached project help you?
> > >
> > >Note that you call the Gambas interpreter to start your Gambas program. The
> > >interpreter takes arguments of its own so you have to take the canonical
> > >measures (i.e. the sole double dash) to make gbx3 leave your argument to
> > >gb.args:
> > >
> > >   $ gbc3 && gbx3 -- --replace ABC
> > >
> > >in your project directory will compile and call the program.
> > >
> > >Also, you wrote this message to the gambas-devel mailing list which is for
> > >people who contribute to Gambas. To ask Gambas user/usage questions like
> > >yours, there is the gambas-user mailing list (which I'm CC'ing now). You
> > >will likely get an even quicker response there :-)
> > >
> > >Regards,
> > >Tobi
> > >
> > Hi,
> > 
> > Thanks for the project. Just what I needed. One last question: how can I add
> > the parameter to the --help text?
> > 
> > I read at http://gambasdoc.org/help/comp/gb.args/args/getinteger?v3
> > "_ArgName_ is the name of the option argument used by the --help option."
> > 
> > Almost what I need, I just don't know how to define an option that takes an
> > argument, like --replace sometext does.
> > 
> 
> Args.Get() is for options which accept some data (in string form). There are
> GetInteger() and GetFloat() which convert the argument to Integer or Float
> for you. For argument-less options, you have the Has() method.
> 
> You specify the help text and stuff in the call to Args.Get()/GetInteger()/
> GetFloat()/Has(), like so (adapting the project I sent):
> 
>   $sReplace = Args.Get("r", "replace", "Specify the replacement text", "rep")
> 
> Then
> 
>   $ gbc3 && gbx3 -- --help
>   Usage: gui-args <options> <arguments>
> 
>   Options:
>    -r --replace <rep>                     Specify the replacement text
>    -V --version                           Display version
>    -h --help                              Display this help
> 
> I first thought it was some non-deterministic black magic which makes the
> arguments to some method call appear in that help text but if you experiment
> a bit with gb.args (place Args.Begin(), ..., Args.End() blocks into different
> sections of your program or look into its source code), you'll see that it is
> still limited to the traditional idea of action before reaction.
> 
> Regards,
> Tobi
> 
> -- 
> "There's an old saying: Don't change anything... ever!" -- Mr. Monk
> 
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-- 
B Bruen <bbruen at ...2308...>
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