Re: [Discuss-gnuradio] Questions about the qt frequency display.

[Marcus D. Leech]

On 02/05/2011 9:54 AM, Tom Rondeau wrote:
> Ok, that makes sense. It seems pretty easy, too, although I'm not sure 
> it's possible.
>
> Josh, can you have a parameter setting in a GRC block that is no a 
> constructor argument? Instead, it's an accessor function that gets 
> called to set a value after the block is instantiated?
>
> Tom
I'll answer on Josh' behalf, since he's probably not awake yet, over 
there on the left coast :-)

Yes, a *lot* of the runtime-changeable parameters in GRC are actually 
implemented as calls to object methods, not just constructor functions.
  Check out the XML sometime to get a feel for how this works.  The XML 
files for GRC objects basically describe the properties of parameters, and
  which methods to call to change those parameters.  Which is how 
things like "frequency" on a UHD source block get changed at runtime.