[Qgis-developer] QWT polar for qgis 3?

[Nyall Dawson]

On 30 September 2016 at 15:39, Neumann, Andreas <a.neumann at carto.net> wrote:
> Hi,
>
> I vaguely remember that it is used to display the satellite constellation of
> GPS receivers. Potentially also used by some Python plugins.

Yeah - that's the only place it's used in QGIS itself.

>
> qwt and qwt-polars did cause quite a few troubles for me during compiling in
> the past.
>
> Given that qt5 has a charting component that also includes polar charts
> (http://doc.qt.io/qt-5/qtcharts-index.html), I would appreciate to get rid
> of the qwtpolar dependency.

Only problem is that QtCharts are Qt >= 5.7 only.

Last time we discussed this the conclusion was that it'd be moderately
straightforward to reimplement the satellite widget as a custom widget
ourselves. But no-one's done this and I think we can remove it until
someone steps up to port it/fund a port.

Nyall


>
> Andreas
>
> On 2016-09-30 07:35, Nathan Woodrow wrote:
>
> Where is it used?
>
>
> On Fri, 30 Sep 2016 3:10 pm Nyall Dawson <nyall.dawson at gmail.com> wrote:
>>
>> Just wanted to raise this discussion again now that we've dropped qt4
>> compatibility.
>>
>> Should we remove all references to qwt polar from the source and
>> remove the associated cmake flag? AFAIK it can't be used with qt5 and
>> the flag causes a lot of issues for new builders who don't know that
>> they need to disable it.
>>
>> Nyall
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