[Marble-devel] Marble Widget usage

Sun Sep 12 04:38:32 CEST 2010

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The application I am working on is actually a little more involved
than a simple map. My goal is to create an open source app that will
rival GSAK on all 3 major OS's (windows/mac/linux) since GSAK is a
paid app and only works (well) in windows.

I'm not sure about other geocaching websites, but groundspeak (owners
of geocaching.com) have clearly stated that application access to
their website (other than embedded web browsers) to download cache
information is in violation of their TOS. People have written page
scanners in the past and groundspeak has shut them down. I would not
recommend it.

The best bet (which I'm taking) is to have people do "pocket queries"
which download a bunch of caches to a gpx file, then load those into
their programs (that's how GSAK does it).

To improve the website, I would recommend a link to a page explaining
the marble-widget with some links to those tutorials you listed. The
only place I was able to find those tutorials (other than the email)
was the kde techbase page that lists the tutorials for all of kde.
Adding a mention of the #marble irc channel might help as well. Right
now only the #kdeedu channel is mentioned.

I was able to compile the tutorial examples just fine by using the
files that were installed to /usr/include/marble but trying to use the
svn lib folder resulted in compile errors (either missing moc_
instructions or missing icons). Is there anything particular I need to
do to get my application to compile on systems that do not have the
entire marble application installed.

I am also hoping to get the application working in Windows (currently
developing in Arch and testing in Ubuntu) and was wondering what kind
of problems I might run into with that. I read that the marble-qt
version did not do automatic map downloads, does this mean
openstreetmaps/etc will not work if I use the widget in a qt-only
application?

One of the things I was unable to accomplish with the other library I
was using (QMapWidget) was automatic resizing. My application has an
area split (with an adjustable splitter) with the map on one side. I
was unable to figure out how to get the map to fill the entire space
and have it resize when the window changed shape (resize event does
not take splitter into account) or when the splitter was moved.
Judging by the tutorials, it looks like marble-widget uses a
diffferent system for sizing, so I don't think it will really be an issue.

Thank you very much for the information, it has definitely gotten me
started at the very least.
~Doug Penner

On 09/11/2010 12:19 AM, Torsten Rahn wrote:
> Hi Doug,
>
> Am Samstag, 11. September 2010 08:46:11 schrieb Doug Penner:
>> Hi, I am developing a geocaching application (qgeoview) in qt with the
>> GPL3 license and would love to try the marble widget to see how it
>> works compared to the other qt map widgets (of which I have sadly
>> found very few).
>
> Nice coincidence. I just looked on thursday into what it would take to
create
> a Geocaching plugin for Marble, which would maybe query the different
online
> caching sites and display the geocaches on the Marble map.
> Maybe that could be nicely combined with our new Bookmark feature. So
maybe
> you could look into this ... ;-)
>
>> The Marble homepage mentions a Marble Widget for developers, but I am
>> unable to find a download for just the widget.
>
> Ok, we'd like to improve our homepage. Any suggestions how we should maybe
> improve it so that people can better find it? :-)
>
>> I can only find the
>> complete Marble and Marble-QT. I downloaded both sources and tried to
>> find a marble-widget subfolder but found that MarbleWidget.h (and
>> .cpp) were in the libs folder mixed with all sorts of other libraries.
>
> In the source folder basically everything below marble/src/lib
> is part of the widget. The MarbleWIdget class itself is located at
>
> marble/src/lib/marblewidget.h
>
> MarbleWidget is basically comparable to a widget like QWebView. So it
> contains a ready-made solution for providing everything maps: Parsing of
> different file formats (GPX, KML, etc.), Location API, Plugins, etc.
>
> You've probably followed http://edu.kde.org/marble/obtain.php already for
> compiling Marble, so the next step would be to follow the Tutorial:
>
>
> There is a tutorial (with the API docs referenced) here:
>
> http://techbase.kde.org/Projects/Marble/MarbleCPlusPlus
> http://techbase.kde.org/Projects/Marble/MarbleMarbleWidget
> http://techbase.kde.org/Projects/Marble/MarbleSignalsSlots
> http://techbase.kde.org/Projects/Marble/MarbleGeoPainter
> http://techbase.kde.org/Projects/Marble/LayerInterface
>
> For creating a GeoCaching plugin you might want to read about creating
online
> plugins:
>
> http://techbase.kde.org/Projects/Marble/OnlineServices
>
> You can also join us on #marble on IRC for further questions. There's
also a
> Marble Facebook Group at
>
> http://www.facebook.com/group.php?gid=346064806033
>
>> I'm sure I could (with some work) follow the #include's and find all
>> the required files, but I was wondering if there was a separate
>> download that contained "just" the widget.
>
> The application itself is usually just a very thin layer above the widget.
> The widget provides all the capabilities like location detection, GPX
support,
> KML support and lots of other stuff.
>
>> I was also wondering if there was an API listed anywhere's or if I
>> should just go by the comments in the source code.
>
> http://api.kde.org/4.x-api/kdeedu-apidocs/marble/html/
>
>> My project is still in the very early stages (a few features
>> implemented, replacing a few parts right now). You can check it out at
>> http://code.google.com/p/qgeoview/ if you want to know more.
>
> I'll give it a try. :-)
>
> Best Regards,
>
> Torsten
>
>>
>> Thank You
>> ~Doug Penner
>>
>> _______________________________________________
>> Marble-devel mailing list
>> Marble-devel at kde.org
>> https://mail.kde.org/mailman/listinfo/marble-devel
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