Re: [Discuss-gnuradio] QT graphical sink: how set dimension?

[Marcus Müller]

I know there's the Qt Tab widget (look under "GUI widgets"), but I
haven't played around with that.

Regarding protected python code:
Well, the problem is that the python code Generator class re-generates
the python code from scratch each time and doesn't even try to read
what's there already. That really makes debugging the code generation
easier; there's no chance some modification might damage the "stub" code.
However, it means that modifications don't survive, indeed.

In many circumstances, there might be an elegant workaround: If you've
got a relatively recent GNU Radio, your GRC will contain "Python
Module", which you can use to have python code that gets automatically
written to a different .py file when the Python code is generated; that
way, you can have your own functions that you can call e.g. in your
block properties.

But I think your idea is pretty interesting, anyway. Maybe there's
already thoughts on that or similar concepts; I just don't know :)

Best regards,
Marcus

On 31.03.2016 14:18, Vitt Benv wrote:
> Tnx Marcus, you are right, I'm speaking about "graphical" properties.
> I was aware about "GUI Hint" and I tried this but only to put widgets
> in rows x columns positions.... but now I know about the subsequent
> parameter: I'll test those.
>
>  Now I miss only Tabs as Notebook was used, but never mind, I'll try
> another way!
>
> About GRC I think it's a good "starting point" but then some extra
> code does the job.
>
> A useful feature in GRC could be to have some kind of protection on
> added code between builds... if I recall right there was an IDE
> (WxGlade... maybe...) who understood a simple tag as:
>
> ....
> ### PROTECTED CODE ###
>
> ... added code
>
> ###
> ....
>
> so that in subsequent build that wasn't overwritten ( actually it
> happened several times, sgrunt!).
>
> Tnx again, ciao ^__^
>
> Victor
>
> 2016-03-31 13:40 GMT+02:00 Marcus Müller <address@hidden>:
>> Hi Victor,
>>
>> what specifically are you referring to when you say "dimension" of your
>> graphical sinks; do you mean the "logical" size (in points of the FFT)
>> or the "graphical" size (in pixels of the widget, or the window)?
>>
>> You can specify the heights of the widgets manually, but that would
>> require you to interfere with Qt taking care of window layout (and is
>> not a good idea most of the time); if possible, prefer to use a relative
>> grid layout as explained below.
>>
>> The equivalent to WX' Notebook, there's the QT "GUI Hint" property. It's
>> pretty awesome, if you want to have a grid kind of layout; its format is
>>
>> row,column, row_span, column_span
>>
>> So, if you want something like
>>
>> +-------+-------+
>> | Time  | Freq  |
>> | Plot  | Plot  |
>> +-------+-------+
>> |    Slider     |
>> +---------------+
>>
>> The GUI hints would be
>>
>> time plot: 0,0, 1,1  (first (=0.) row, first column, one row high x one
>> column wide)
>> freq plot: 0,1, 1,1 (first row, second column, 1x1 )
>> slider: 1,0,1,2 (second row, first column, 1 high x 2 wide)
>>
>> Generally, it's possible (though not directly from GRC without writing
>> your own Python) to embed your Visualization into your own Qt
>> Application; there's a few projects out there that do that, but I don't
>> think we really have a best practice guide for that just yet :)
>>
>> Cheers,
>> Marcus
>> On 31.03.2016 12:45, Vitt Benv wrote:
>>> Good morning,
>>> I'm exploring QT graphical, to begin lo leave WX widget....
>>> I'm looking for good infos about resizing / fix the dimensions of my
>>> two graphical sinks ( frequency / spectrogram), Googled around but no
>>> clear infos :-(
>>> Moreover in WX there's a Notebook container, very useful with crowded
>>> GUI.... there's an equivalent in QT?
>>> Tnx in advance for any answer.
>>>
>>> Victor, I3VFJ
>>>
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