[josm-dev] How to use DownloadTask in Python/Jython

[Jo]

Hi Paul,

Many thanks for your help. f.get() makes the script hang forever. When I
don't add it the download works correctly. At least, once I cleaned up the
Overpass Query.

This is where I am now (# means comment and shows all the other stuff I
tried).

At the moment the query runs and the download is performed, but I'll have
to abort the script there, (and have the user restart it), as I can't find
a way to make it wait for the download to complete.

The other problem is that I don't see how to restrict it to the bbox I
zoomed in upon. So the script downloads all the routes with that same ref
all over the region, for the operator in question.

        for relation in selectedRelations:
            for member in relation.getMembers():
                if member.isNode():
                    n = member.getNode()
                    haltNodes.append(n)

        overpassQuery = '''(rel
                                ["type"="route"]
                                ["route"~"bus|tram"]
                                ["ref"="''' + ref + '''"]
                                ["operator"="''' + operator + '''"]
                              ->.routes;
                             .routes << ->.route_masters;
                             way(r.routes);
                             node(w);
                             node(around:30.0);
                             way(bn);
                             node(w);

                            );

                            out meta;'''
        dt = DownloadOsmTask()
        print dir(dt)
        f = dt.loadUrl(False, 'http://overpass-api.de/api/interpreter?data='
+ overpassQuery.replace('   ', ' ').replace('  ', ' ').replace('  ', '
').replace('  ', ' ').replace('\r', '').replace('\n', ''), None)
        # mv.getVisibleRect().getBounds(),
        # print dir(dt)
        # print dir(relation)
        # bboxCalculator = BoundingXYVisitor()
        # bboxCalculator.computeBoundingBox(haltNodes)
        # print dir(bboxCalculator)
        # print bboxCalculator
        # print dir(mv)
        # print dir(mv.getVisibleRect().getBounds())
        # print dir(mv.getVisibleRect().getMinX())
        # print dir(mv.getVisibleRect().getMinY())
        # print dir(mv.getVisibleRect().getMaxX())
        # print dir(mv.getVisibleRect().getMaxY())

        # dt.download(False,
Bounds(mv.getVisibleRect().getMinX(),mv.getVisibleRect().getMinY(),mv.getVisibleRect().getMaxX(),mv.getVisibleRect().getMaxY(),),
None)
        # print dt.isFailed()
        # dt.getDownloadedData()
        print dir(f)
        # time.sleep(20)


2015-01-16 15:00 GMT+01:00 Paul Hartmann <phaaurlt at gmail.com>:

> On 16.01.2015 14:23, Jo wrote:
>
>> Hi guys,
>>
>> Unfortunately I'm not smart enough to code in Java, so I use Python in the
>> scripting plugin, which gets me quite far, but now I'm stuck:
>>
>> [...]
>>
>>          dt = DownloadOsmTask()
>>          dt.loadUrl(False, 'http://overpass-api.de/api/interpreter?data='
>> +
>> overpassQuery, None)
>>          dt.realRun()
>>
>>
> loadUrl returns a Future object. You can call the get() method on that
> object, to wait for the download to finish (it is done in a background
> thread):
>
>   f = dt.loadUrl(...)
>   f.get()
>
> Also you don't call dt.realRun() directly, the method loadUrl should
> already do this.
>
> Paul
>
>
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