[QGIS-Developer] Best Qgis python plot library

[Benjamin Jakimow]

Hi Jorge,

to my experience PyQtGraph might fit your needs best.
It is fast, it's easy to realize interactions between GUI and Backend 
(in both directions!) and it uses many
concepts that are commin in the Qt/PyQt world. You can easily deliver it 
as subpackage of your own project (~2.5 MB, MIT/X11 license) [1]

I recently started to use plotly too, but not for GUI programming. Nice 
to use as well, better default styles and much better documented than 
PyQtGraph.
Otherwise it's probably harder to be used in a GUI and to realize GUI 
<-> Backend interactions, e.g. if you want to update your plot fast or 
react on mouse clicks (please correct me if I'm wrong).

I'd love to see QtCharts [3] as part of QGIS distributions, as it is 
probably closest to common Qt paradigms like Model/View programming.

Greetings,

Benjamin

[1] 
https://pyqtgraph.readthedocs.io/en/latest/how_to_use.html#embedding-pyqtgraph-as-a-sub-package-of-a-larger-project

[2] https://doc.qt.io/qt-5/qtcharts-overview.html

[3] https://doc.qt.io/qt-5/qtcharts-overview.html

On 2021-06-10 22:49, jorgealmerio at yahoo.com.br wrote:

> Hi all,
> 
> I want to create o plot chart as a widget in my plugin. I already used 
> MatPlotLib in the past, but I don't know it is the best choice.
> 
> I know some plugins use PyQtGraph and others PyQwt (I think it was 
> deceased for Qt5)
> 
> Some features I consider relevant:
> 
> 1) Works native in Qgis enviroment, no need to install anything.
> 
> 2) Fast
> 
> 3) Easy to code
> 
> 4) Will not be discontinued in the near future
> 
> What is the library best option?
> 
> Thanks in advance
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-- 
--
Benjamin Jakimow, Doctoral Researcher
Earth Observation Lab | Geography Department | Humboldt-Universität zu 
Berlin

e-mail: benjamin.jakimow at geo.hu-berlin.de

phone:  +49 (0) 30 2093 6894
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