Thu, 18 Dec 2014 18:07:18 +0100 David van rijn <davidvanr...@gmail.com>:
Thanks for the feedback :)
I had already looked a bit at the monav stuff because i had it on my
N900, but like you said, it seems abandoned, so i didn't feel like
using it.
But the Mapbox GL definitely looks primising, i will have a look at it
later.
I did not know about the qml pinchmap. I have tried out modrana
though, and it seems a bit crude, because it's written in python, and
i can imagine (correct me if i'm wrong) that implementing the whole
element in qml is a bit recource-unfriendly if you compare it to the
low-level c++ /updatePaintNode()/ method.
Well, I'm actually to this day kinda surprised how well it works,
considering how it is implemented. Most probably thanks to the original
clever idea the AGTL developer had of using a fixed tile grid and just
shifting the coordinates of the tiles in the grid when panning the map.
The QtQuick image cache then takes care of all the tile caching for you
and it works surprisingly well. On the other hand the hack[0][1] I had
to implement to enable really asynchronous tile download with caching is
just plain crazy, but works. :)
The QML-only nature of the widget also helps to avoid more C/C++
dependencies that unlike the pure-Python/QML based modRana would need to
be compiled for the various platforms where modRana is running and it
also makes it easier to adapt it to the various specific modRanas needs. :)
Still I would not mind adding support for an alternative map widget,
integrating it with the current one or maybe even using it by default if
fits to modRanas requirements better than the current solution. :)
I think it would be really cool if it is possible to have all apps use
the same maps, and have those be configurable somewhere central (like
in the settings app).
Actually I've tried to propose a common map data storage location for
the Jollas micro SD card a while ago on this list[3] in a thread called
"[SailfishDevel] [RFC] Well known map data path" but it unfortunately
did not get any traction back then. So maybe the proposal can be
salvaged or even extended to cover map data sharing in internal storage ?
BTW, shared map data storage worked/works quite nicely on the N900 -
there is /home/user/MyDocs/.maps folder that various third part mapping
and navigation apps (modRana, Mappero, Maep, Cloud GPS, etc.) use for
storing & sharing map tiles. So it would be nice to have the same thing
also on the Jolla/Sailfish OS. :)
Actually, there already seem to be some early positive results from
users enabling tile sharing between modRana and Poor Maps[3]. :)
cheers,
David
Regards
Martin
[0]
https://github.com/M4rtinK/modrana/blob/master/modules/gui_modules/gui_qt5/gui_qt5.py#L549
[1]
https://github.com/M4rtinK/modrana/blob/master/modules/gui_modules/gui_qt5/qml/Tile.qml#L35
[2] https://lists.sailfishos.org/pipermail/devel/2014-March/003731.html
[3] http://talk.maemo.org/showthread.php?p=1451148#post1451148
2014-12-18 0:16 GMT+01:00 Martin Kolman <martin.kol...@gmail.com
<mailto:martin.kol...@gmail.com>>:
Wed, 17 Dec 2014 16:04:31 +0100 David van rijn
<davidvanr...@gmail.com> <mailto:davidvanr...@gmail.com>:
Hello,
Hi!
I am writing a qml component to display a slippy map (eg. google
maps).
(You can look at the code at
https://github.com/unsanded/harbour-mapp.)
The idea is to be able to add maps in qml by just typing
something like:
SlippyMap{
GoogleMapsProvider{
apiKey: "blabla"
}
}
I have a few questions about this:
- Can it, at some point, become a library for others to use?
Could be certainly interesting and useful! :)
- What is the best way to implement offline maps/routing?
For offline routing the routino routing utility[0] currently looks
like the best bet for Sailfish.
I have already managed to build it's package for Sailfish[1] and
it appears to be working fine. :)
Another candidate could be the Monav[2] routing daemon, but it's
upstream is dead, it depends on Qt 4 and its source
code has been bit-rotting rather badly.
As for offline map rendering, the Mapbox GL native widget[3] looks
like the best bet, if it could be wrapped in a QML element! :)
I even suggested the QML integration to the Mapbox people, but
they unfortunately replied that they are not interested in doing
that themselves (most probably not to canobalize their iOS &
Android SDKs with a superio solution ;-) ).
- Is anyone eager to join the project?
- any other feedback?
Many current Sailfish OS applications are using the QML-only
PinchMap QML element, originally from AGTL, for example:
* modRana[4]
* FourSail[5]
On the other hand the Poor Maps application has a custom solution
based on enhanced QtLocation Map element.
So maybe have a look how these work and what features these
applications expect as inspiration work on your project. :)
Cheers,
David
Best Wishes
Martin Kolman
(main modRana developer)
[0] http://www.routino.org/
[1]
https://build.merproject.org/package/show/home:MartinK:sailfish/routino
[2] https://code.google.com/p/monav/
[3] https://github.com/mapbox/mapbox-gl-native/
[4]
https://github.com/M4rtinK/modrana/blob/master/modules/gui_modules/gui_qt5/qml/PinchMap.qml
[5]
https://gitorious.org/foursail/foursail/source/31644f69c670f5f012f98bee641e1b7e50ba4e1f:qml/PinchMap.qml
_______________________________________________
SailfishOS.org Devel mailing list
To unsubscribe, please send a mail to
devel-unsubscr...@lists.sailfishos.org
<mailto:devel-unsubscr...@lists.sailfishos.org>
_______________________________________________
SailfishOS.org Devel mailing list
To unsubscribe, please send a mail to devel-unsubscr...@lists.sailfishos.org
_______________________________________________
SailfishOS.org Devel mailing list
To unsubscribe, please send a mail to devel-unsubscr...@lists.sailfishos.org
