How to view images on GUI without a static path

Question

I was wondering if it is possible to send an image in my GUI but have the path saved as a fact in my database. Instead of calling it using resource(logo,image,image('logo.jpg')). Is it posible to call a variable inside ('logo.jpg') that will change depending on the fact that is called?.

Answer 1

The better hint I can give you is to learn to use XPCE live documentation. From swipl-win open menu

\ Help \ XPCE (GUI) manual...

From there (the small window titled XPCE Manual) open menu \ File \ Demo Programs and from the list proposed click Image viewer. Click button [ Source ] and at bottom of file there is the code example you're looking for.

A bit of DRY could turn it in a reusable component. For instance:

/*  File:    pce_image_view.pl
    Author:  Carlo,,,
    Created: May 19 2019
    Purpose: answer https://stackoverflow.com/q/56201622/874024
*/

:- module(pce_image_view, [pce_image_view/1]).
:- use_module(library(pce)).

pce_image_view(Filename) :-
    new(I, image(Filename)),
    !,
    new(B, bitmap(I)),
    new(P, picture),
    send(P, display, B),
    send(P, open).

save the file, consult it and call:

?- pce_image_view('/home/carlo/Pictures/prova1.jpg').
true.

Sorry then demo program - it's a fairly complete local file typed browser - seems not working right now out-of-the-box. Anyway, some higher level constructs made available by recent language development could be applied to make the API more comfortable.