> -----Original Message----- > From: Alexandru Csete [mailto:oz9...@gmail.com] > Sent: Wednesday, 5 January 2011 12:47 AM > To: Mike Cornelius > Cc: Tom Rondeau; discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] gr_qtgui, SWIG. QT Signals and such > > Greetings, > > Few months ago I started experimenting with using Qt and the gr-qtgui > component and I found it to be much easier to work with that wxPython. >
Hi Alex, Credit where credit is due, It was actually your gqrx project that got me started on this :) I noticed in your screenshots that you had changed the plot colours and I thought 'That looks nicer, I wonder how he did that ?', of course once I started playing around with the qtgui code I figured there were a few more things that I could fiddle with. > I found the additional controls to be useful when they are needed but > they take up quite a lot pf vertical space. In the present > configuration they consume about 1/3 of the vertical space and this > doesn't leave much room for application widgets on e.g. laptop screens > which are usually limited to less than 800 pixels. > Furthermore the current control isn't ideally suited to having more than 1 plot on an UI or to small plot areas. I don't want to neglect the existing control though as having to put together a custom layout is probably more trouble than it's worth in a lot of cases. I think adding interfaces to the existing control for things like the markers, grids, colours and the form controls would be useful too. > On Tue, Jan 4, 2011 at 10:00 AM, Mike Cornelius <d...@drelectro.com> > wrote: > > On Tue, Jan 4, 2011 at 2:42 AM, Tom Rondeau <trondeau1...@gmail.com> > wrote: > >> On Mon, Jan 3, 2011 at 2:53 AM, Mike Cornelius <d...@drelectro.com> > wrote: > >>> - Added a center frequency marker and interface > >>> - Changed zoomer to use drag select rather than click select > >> > >> I'm not sure what you mean by this. Probably GUI lingo that I'm not > >> familiar with. Could you explain? > > > > The CF marker is a vertical line in the centre of the spectrum plot > window, > > it's a handy visual tuning aid (like Marker->CF on an a spectrum > analyser). > > May I suggest to make it a generic marker that can be placed anywhere > not just at the center. Also, enabling the major grids of the QwtPlot > widget will add a vertical line at 0. > Absolutely. > > Presently the zoom function in gr_qtgui works as 'click - drag - > click' I > > changed it to 'button down - drag - button up' > > To me 'button down - drag - button up' already zooms on all gr-qtgui > plots. 'click - drag - click' does nothing... > I wonder if this is some desktop specific setting? I use Gnome desktop. > > Alex Hmm interesting, I use Gnome too (Ubuntu 10.4) The change was trivial, in FrequencyDisplayPlot.cc I changed:- _zoomer->setSelectionFlags(QwtPicker::RectSelection | QwtPicker::ClickSelection); to _zoomer->setSelectionFlags(QwtPicker::RectSelection | QwtPicker::DragSelection); Mike _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
