Re: [Discuss-gnuradio] wxPython programming

[James Cooley]

Hi Chuck/All

I have a rough version of exactly what you seek that I did today! See 
attached. Not cleaned, no guarantees, but suggestions/improvements 
welcome. I have a wrapper class, gr_powermate which wraps the standard 
python powermate lib posted recently.

Also, I got tired of setting and calculating a separate front-end freq. 
So with this, there is ONE notion of freq. THere's a func that sets the 
front end and usrp accordingly.

This amounts to a nearly full featured scanner.


The gist of your problem was solved by using a wx EVT_IDLE, like so:

       # add an idle handler
       self.frame.Bind(wx.EVT_IDLE, self.onIdle)

Be careful. So the onIdle handler is called when ever wx isn't busy. wx 
is busy a lot, so make sure you don't block for too long. There's 
probably a more elegant way to not block. For me, I just made sure the 
powermate stuff was quick! It scans for 50ms at a time then gives up.

See

http://wiki.wxpython.org/index.cgi/LongRunningTasks

for some discussion. Enjoy!

-jamie

By the way, I guess squelch can't be changed on the fly? That would be 
nice. So, the control does nothing right now.






cswiger wrote:

> Gang - I'm paradigm shifting from python to wxpython and having
> a terrible time of it, but it must be done.
>
> Basically, where do you put an input processing loop in wxpython?
> Or will it have to be changed to event driven somehow?
>
> I tried putting a loop at the end of:
>
>
> class app_flow_graph (stdgui.gui_flow_graph):
>    def __init__(self, frame, panel, vbox, argv):
>        stdgui.gui_flow_graph.__init__ (self, frame, panel, vbox, argv)
>
>         [create windows, connect blocks and handle events]
>
>         while 1:
>                 process input
>
>
> but that, naturally, blocks the window from ever being drawn.
> Shouldn't it go in app.MainLoop() somewhere?
>
> I've been able to create a frame, play a file and change freq with
> a text control a-ok. Basically I want to control the radio with a
> knob and display the status in a window.
>
> TIA.
>
> --Chuck
>
>
>
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>

gr_powermate.py
Description: application/python

nbfm_rcv_ctrl.py
Description: application/python