ubuntu-phone team mailing list archive

[Tal Zion <talzion12@xxxxxxxxx>]

I haven't written a scope yet but I have implemented what you described in
bullet point 1 in my app. Here is my RequestManager
<http://bazaar.launchpad.net/~nogzatalz/downow/trunk/view/head:/src/downow/search/RequestManager.cpp>
class which delays requests as you described. It is pretty simple and
generic. Regarding number 4 I'd suggest QtConcurrent
<http://qt-project.org/doc/qt-5/qtconcurrent-index.html> for general
background processing and QNetworkAccessManager
<http://qt-project.org/doc/qt-5/qnetworkaccessmanager.html> for
asynchronous HTTP requests if you're using Qt. If you're not using Qt I'd
suggest Boost.Asio
<http://www.boost.org/doc/libs/1_56_0/doc/html/boost_asio.html> which
provides you with a run loop, asynchronous IO, and TCP sockets and also
Boost.Thread <http://www.boost.org/doc/libs/1_56_0/doc/html/thread.html>.

On Mon, Nov 3, 2014 at 9:55 PM, Robert Schroll <rschroll@xxxxxxxxx> wrote:

> Hi all,
>
> I started playing around with scopes and have run into a few questions. If
> there's a better place to ask about this, please let me know.  Otherwise:
>
> 1) Is it possible to delay a query until the user hits "Enter"?  Or
> failing that, until a second or so has passed from the last key stroke? I'm
> experimenting with a service that rate-limits queries, and the partial
> queries won't lead to useful results anyway.  I'd prefer an explicit
> indication from the user that they're done, but I'm not sure if that's
> possible.  I'm guessing that the delay is possible, but I don't know if
> that should go in the client or the query or somewhere else.
>
> 2) Is it possible to display images without any rescaling or cropping?  I
> can tell the service the maximum size for images, but the actual size and
> aspect ratio will depend on the content.  Both in the query and the
> preview, I'd like to insert those images as-is, but the defaults rescale
> and, in the query view, crop them.
>
> In a related issue, I've set ShapeImages=false in the .ini file, but that
> doesn't seem to have any effect.  That could be related to...
>
> 3) How do you get an updated .ini file to be used?  I'm testing on an
> emulator (r243), and it seems to be caching the old .ini files. The only
> way I can get it to recognize an updated one is to restart the emulator.
> Surely there's a better way?
>
> 4) Is there some guide to making asynchronous queries?  The tutorials I'm
> working off of seem to be synchronous, although the docs suggest the
> different parts may be running in different threads.  But I'd like to fire
> off a query, get and display some results, and then fire off some more
> queries based on those results and display them when those replies get
> back.  I've never worked with asynchronous code in C++, so a pointer to a
> C++ tutorial may be helpful.  This may be relevant for (1).
>
> Thanks,
> Robert
>
>
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