Customizable background map

[vibrog]

Customize background map tileset URL using the defaults command.
See https://github.com/n8gray/QLColorCode

[vibrog]

    // Set up preferences
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    NSMutableDictionary *env = [NSMutableDictionary dictionaryWithDictionary:
                                [[NSProcessInfo processInfo] environment]];
    [env addEntriesFromDictionary:[NSDictionary dictionaryWithObjectsAndKeys:
                                   @"//opencache.statkart.no/gatekeeper/gk/gk.open_gmaps?layers=topo2graatone&zoom={z}&x={x}&y={y}", @"tileUrl",
                                   @"Kartverket", @"tileAttribution", nil]];
    [env addEntriesFromDictionary:[defaults persistentDomainForName:myDomain]];

To change the setting

defaults write io.github.vibrog.guicklook-gpx \
  tileUrl //{s}.tile.openstreetmap.org/{z}/{x}/{y}.png