Fwd: Re: Subsurface mobile downloadfromdivecomputer

Tue Apr 26 06:50:27 PDT 2016

I didn't received. looking now.

On Tue, Apr 26, 2016 at 4:28 AM, Willem Ferguson <
willemferguson at zoology.up.ac.za> wrote:

> Tomaz,
>
> I do not know whether you received this mail.
> I sent this on Apr 22nd and on 24th.
>
> Kind regards,
> willem
>
>
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> From: 42 2016 <>
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> Subject: Fwd: Re: Subsurface mobile downloadfromdivecomputer
> Reply-To: willemferguson at zoology.up.ac.za
> References: <571A631D.6040309 at zoology.up.ac.za>
> <571A631D.6040309 at zoology.up.ac.za>
> To: Tomaz Canabrava <tcanabrava at kde.org> <tcanabrava at kde.org>
> From: Willem Ferguson <willemferguson at zoology.up.ac.za>
> <willemferguson at zoology.up.ac.za>
> Organization: University of Pretoria
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> <571C877A.7000901 at zoology.up.ac.za>
> Date: Sun, 24 Apr 2016 10:44:42 +0200
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> Tomaz,
> I do not know whether you received this mail.
> Kind regards,
> willem
>
>
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> From: 02 2016 <>
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> Reply-To: willemferguson at zoology.up.ac.za
> Subject: Re: Subsurface mobile downloadfromdivecomputer
> References: <571A2BB5.1010205 at zoology.up.ac.za>
> <571A2BB5.1010205 at zoology.up.ac.za>
> <CACk01_y362=c54_ogsPksbfOd7xYpUgMOiUvXqqo+JJamAjM6Q at mail.gmail.com>
> <CACk01_y362=c54_ogsPksbfOd7xYpUgMOiUvXqqo+JJamAjM6Q at mail.gmail.com>
> To: Tomaz Canabrava <tcanabrava at kde.org> <tcanabrava at kde.org>
> Cc: Subsurface Mailing List <subsurface at subsurface-divelog.org>
> <subsurface at subsurface-divelog.org>
> From: Willem Ferguson <willemferguson at zoology.up.ac.za>
> <willemferguson at zoology.up.ac.za>
> Organization: University of Pretoria
> Message-ID: <571A631D.6040309 at zoology.up.ac.za>
> <571A631D.6040309 at zoology.up.ac.za>
> Date: Fri, 22 Apr 2016 19:45:01 +0200
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> On 22/04/2016 15:55, Tomaz Canabrava wrote:
>
>
>
> On Fri, Apr 22, 2016 at 10:48 AM, Willem Ferguson <
> <willemferguson at zoology.up.ac.za>willemferguson at zoology.up.ac.za> wrote:
>
>>
>> I am forced to ask help. I have now spent about three weeks to solve this
>> problem and I am making no headway whatsoever, probably because my
>> understanding is limited. It is setting up the table to display the
>> uploaded dives. I use a TableView to do this. QML creates it and I can set
>> its attributes. Using the widget code in the present
>> downloadfromdivecomputer.cpp, I pass a model to QML.  But when I specify
>> the model I get a segfault when executing the mobile code on Fedora. I know
>> which C++ instruction throws the segfault but it does not help very much in
>> this case. I just cannot get QML to accept and make use of the model. An
>> important obstacle is the poor error messaging when working with QML.
>>
>> I need someone better qualified than myself to look through the code and
>> tell me where I go wrong. It appears this is a bit of a quieter period in
>> the development cycle. Would any one be prepared to look at it at all?
>> Alternatively, is there a different approach I can take to locate the issue
>> of how QML sees the model?
>>
>
> you forgot to send the code. :)
> usually:
>
> - Mark all methods you wanna call with Q_INVOKABLE
> - export the model to the qml engine
> - access it directly via the name that you used.
>
> send the diff code and I can take a look today
>
>
>> Kind regards,
>> willem
>> ___________
>>
>
> Tomaz,
> The code was not meant to be attached. Here it is as a Dropbox link, all
> 45 MB of it as a tar.gz.
>
> https://www.dropbox.com/sh/nmrzgw10ylq5ii2/AAAX0tbnx97tKQm8wVFzQbb4a?dl=0
>
> The reason is that this is a pretty old version of Subsurface and I do not
> know how to diff an old version in a way that you can easily access it.
> Explanation: For downloading, I removed almost all of the code that is NOT
> widget-oriented from desktopwidgets/downloadfromdivecomputer.cpp and put it
> in subsurface-core/downloadmanager.cpp, together with a few mobile-oriented
> methods. download manager.cpp contains three main sections:
> Class DiveImportedModel :  The class dealing with displaying downloaded
> dives
> Class Downloadmanager:  The class controlling the download process
> Class Downloadthread:  The class doing the actual work.
>
> Downloadmanager includes, as a member, DiveImportedModel (see
> downloadfromdivecomputer.h), possibly the crux of the problem.  It will
> also include Downloadthread as a member.
> The QML interface for the C++ is
> qt-mobile/qml/DownloadFromDiveComputer.qml.
>
> DownloadFromDiveComputer.qml has, around line 95, two blocks of code that
> are alternatives. One of the two code blocks needs to be commented out.
> If one compiles the mobile code with code block A commented out, the code
> compiles and runs on Linux (I use F23). When it runs, you can, within
> Subsurface-mobile do:
> Select main menu on left
> Select Manage dives
> Select Download dives
>
> In the bottom half of the screen is an empty table but with appropriate
> headings. This is where the downloaded dives are shown after download. The
> class DiveImportedModel controls this table. I wish to replace code block B
> with the simple instruction comprising code block A.
>
> Now disable Code block B and enable code block A.
> The program crashes upon launching.
>
> The crash is caused by line 67 in subsurface/subsurface-mobile-helper.cpp
> (setContextProperty(downloadhelper.....)
>
> Any advice will really be appreciated.
>
> Kind regards,
> willem
>
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