Using theme with QTGUI qss files makes transition lines between points on QT GUI Constellation Sink

GNU Radio
1

The new GRC theme system using qss files looks pretty neat and seems
very
user configurable. Thanks.

To use this, with my build-gnuradio installed setup, I had to create a
new
file under my home user folder at /home/me/.gnuradio/config.conf and I
had
to add the following to that file.

[QTGUI]
qss = /usr/local/share/gnuradio/themes/alt.qss

To go back to the normal theme I just commented out that line, like
so…

[QTGUI]
#qss = /usr/local/share/gnuradio/themes/alt.qss

All this works just fine.

BUT

I did run into one issue using this with a QT GUI Constellation Sink.

The constellation points have the lines turned on running between them
(ie
so they look like a transition diagram instead of what I think of as a
constellation diagram).

So before I asked for help here I thought I’d have some fun with it and
tried some stuff on my own.

I tried adding the following to the alt.qss file in my
/usr/local/share/gnuradio/themes folder (had to change file permissions
on
the qss files to do this with my editor - but I am guessing the
permissions
change is not an issue).

ConstellationDisplayPlot {
qproperty-line_style1: None;
qproperty-line_style2: None;
qproperty-line_style3: None;
}

I put this between the VectorDIsplayPlot entries and the QwtPlotCanvas
entries.
I also tried replacing the similar lines in DisplayPlot with the
selections
for “None” I show above.

None of that changed the constellation to remove the lines between
points.

To make sure I was having ‘some’ effect, I tried making the background
for
the whole plot an ugly green color (changing the top QWidget
background-color) and that worked, so I am at least affecting something
with that file if I had the syntax and context correct.

I did the requesite Google search on “QtCore.Qt.DashLine” to see if
there
was a syntax aside from “None” that would be correct, but while I could
find syntax for several other line choices I did not a find syntax for a
choice for no line. So it is possible the issue is deeper than just a
qss
configuration line.

SO

Any idea how to make the QT constellation plots not have the transition
lines between points when using one of the qss sheets?

Thanks,

  • John
2

Try removing these lines from the DisplayPlot {} section:

qproperty-line_style1: SolidLine;
qproperty-line_style2: DashLine;
qproperty-line_style3: DotLine;

Since the lines are also in Frequency plot and Vector plot sections,
that change should not affect them.
It might mess up a Time plot, but then you can just add those lines to
that section to fix it.

— Seth