On Sat, May 19, 2012 at 11:09 AM, Steve <ctx50...@centurytel.net> wrote:
> On 05/19/2012 11:06 AM, Tom Rondeau wrote: > > > Alright, but that sounds like it's in the right direction. You > > probably need to get a reference to the qApp and then execute that. > > Take a look at some of the Python examples and how they work with the > > qApp and then run the "exec_()" method with it. That gets the Qt > > engine running. > > > > > > Calling the block function exec_() (which calls exec() for the > QApplication) was what was needed. And setting the widget to be visible. > That makes a window pop up with the spectrum. But for some reason the > performance is very bad. > I'm working on Qt performance in a separate branch. For now, though, if by "performance is very bad" you mean "update rate is slow", then change the line in qtgui_sink_c which says: set_update_time(0.5); to: set_update_time(0.05); This will use a 20fps update rate instead of the default (strangely) 2fps. --n > > A couple of other things. exec() does not return till the QApplication > exits. And it must be called from the main thread. At least that is the > error output I got when I tried to call it from a boost thread. To use > it I would have to redesign my application. So I probably won't be > spending any more time with it. > > stephen > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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