Using get-file in racket/gui ...

[Don Green]

I want the file manipulation popup in racket/gui to display a specified dir, not the current directory.
Is that possible?
(get-file #f f) ;displays the popup showing the current directory in frame f.

I expected the following to display the popup showing the specified directory but it does not:
(get-file (string->path "/home/don/projects") f)

Any suggestions?
Don

[Crystal Jacobs]

Looking at the docs:

https://docs.racket-lang.org/gui/Windowing_Functions.html?q=get-file#%28def._%28%28lib._mred%2Fmain..rkt%29._get-file%29%29

It seems like the second argument is the message shown in the title of the
pop-up window. You can include a path as the fourth argument:

(get-file #f f "/home/don/projects")

-Crystal

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[Crystal Jacobs]

Of course, I meant the third, not fourth. Oops!

[Don Green]

Where is the documentation that describes how to interpret the racket syntax?

For example:

(get-file  (message parent directory ...)) ;where the arg list of options are optional but if included are positional meaning that to specify an argument such as 'directory' means that the previous 2 args must also be specified.

[Sorawee Porncharoenwase]

The Racket Reference has a section on the notation used in documentations: https://docs.racket-lang.org/reference/notation.html

But yes, what you said is correct: you are forced to specify every prior optional positional argument. This is why I think optional positional arguments are bad in general. Optional keyword arguments are much better.

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