Re: [Discuss-gnuradio] Load Preset parameters in block

2016-06-20 Thread Mark Arlinghaus 
Maybe "defaults" is not the correct word to describe what I am trying to 
accomplish.  The parameter values that pop up when you first drop the block 
down onto a flowgraph aren't necessarily important.  But once the user double 
clicks the block to open the properties dialog, I want them to be able to 
select from a drop down menu list of presets that will auto-fill the rest of 
the parameters according to which option was selected.  Note that I would like 
the user to still be able to change the values that were "auto-filled" 
previously, so they can enter a setup that deviates slightly from the preset 
without having to enter all of the parameters manually.

I can add all of the necessary info in the xml file.  I just don't know how to 
set the parameters to the proper values based on the selected option.  It seems 
like there should be some mechanism to do it because I can hide or show 
parameters based on the selected options (conditional statements seem to work 
inside of  tags), so there must be some callback mechanism in place.  But 
no way to change the values of the parameters based on a selected option?

Mark

From: Marcus D. Leech [mle...@ripnet.com]
Sent: Monday, June 20, 2016 3:49 PM
To: Mark Arlinghaus; discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] Load Preset parameters in block

On 06/20/2016 03:17 PM, Mark Arlinghaus wrote:
Hi Marcus,

Thank you for your quick response.  Sorry I wasn't clear.  I'm actually talking 
about GRC construction.  Once the code is running the parameters won't need to 
be changed.  If we need to change the parameters, stopping the flowgraph is 
acceptable.  It's really just meant to make the block slightly easier/faster to 
set up by the user.  I'm hoping that this makes the solution simpler!?

Mark
Defaults for block parameters in GRC are defined in the .xml description of the 
block, but there's no way to override what ever is in
  the .xml when you first instantiate a block in GRC.



From: Discuss-gnuradio 
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 on behalf of Marcus D. Leech 
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Subject: Re: [Discuss-gnuradio] Load Preset parameters in block

On 06/20/2016 02:15 PM, Mark Arlinghaus wrote:
Hello,

Is there a way to load preset default parameters in a block.  For example, I 
have a channel model block that takes several parameters, such as the doppler 
spread, path delays, path gains, doppler spectrum, etc., and I want to have 
presets that will auto-populate the parameters in the GRC block for pre-defined 
channel models.  I can make a drop-down menu that has the pre-defined channel 
models, but I don't know how to change the values that populate in the other 
parameters.  I would like to do this using the xml file.  Is there a way to put 
a conditional parameter in the  tags that would depend on the setting in 
the drop down menu (It seems conditionals can be used in the  and 
 tags, but not inside the  tags)?  Is there a way to do it using 
the  tags?  Is there a list of valid options and what they do anywhere?  
It seems the  val:XXX <\opt> tags might do it, but I can't seem to get any 
of them to work.

Although I could pass in a preset parameter to the C++ function and simply 
override everything coming from the GUI, I'd rather have it populate the 
parameters in the block, but still let them be changed.  This way, if someone 
wanted to load the settings for a "Channel X" preset, except with a different 
Doppler spread, it could be done easily.

Note this is a similar problem as posted here:
https://lists.gnu.org/archive/html/discuss-gnuradio/2015-02/msg00016.html,
 but it doesn't appear the previous question was ever answered.

Thank you in advance for your help.

Mark Arlinghaus



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It's not clear whether you're talking about *runtime* or during GRC 
construction.

For runtime, I'd write a little Python module that contains a function for each 
parameter:

setter_function(configfilename, command-line-parameter, widget-control-value)

You then have logic in the function to determine the priority of what gets 
returned:

config-->command-line-->widget-control-value

I've done that in the past.



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Re: [Discuss-gnuradio] Load Preset parameters in block

2016-06-20 Thread Marcus D. Leech 

On 06/20/2016 03:17 PM, Mark Arlinghaus wrote:

Hi Marcus,

Thank you for your quick response.  Sorry I wasn't clear.  I'm 
actually talking about GRC construction.  Once the code is running the 
parameters won't need to be changed.  If we need to change the 
parameters, stopping the flowgraph is acceptable.  It's really just 
meant to make the block slightly easier/faster to set up by the user. 
 I'm hoping that this makes the solution simpler!?


Mark
Defaults for block parameters in GRC are defined in the .xml description 
of the block, but there's no way to override what ever is in

  the .xml when you first instantiate a block in GRC.




*From:* Discuss-gnuradio 
[discuss-gnuradio-bounces+marlinghaus=girdsystems@gnu.org] on 
behalf of Marcus D. Leech [mle...@ripnet.com]

*Sent:* Monday, June 20, 2016 3:09 PM
*To:* discuss-gnuradio@gnu.org
*Subject:* Re: [Discuss-gnuradio] Load Preset parameters in block

On 06/20/2016 02:15 PM, Mark Arlinghaus wrote:

Hello,

Is there a way to load preset default parameters in a block.  For 
example, I have a channel model block that takes several parameters, 
such as the doppler spread, path delays, path gains, doppler 
spectrum, etc., and I want to have presets that will auto-populate 
the parameters in the GRC block for pre-defined channel models.  I 
can make a drop-down menu that has the pre-defined channel models, 
but I don't know how to change the values that populate in the other 
parameters.  I would like to do this using the xml file.  Is there a 
way to put a conditional parameter in the  tags that would 
depend on the setting in the drop down menu (It seems conditionals 
can be used in the  and  tags, but not inside the 
 tags)?  Is there a way to do it using the  tags?  Is 
there a list of valid options and what they do anywhere?  It seems 
the  val:XXX <\opt> tags might do it, but I can't seem to get 
any of them to work.


Although I could pass in a preset parameter to the C++ function and 
simply override everything coming from the GUI, I'd rather have it 
populate the parameters in the block, but still let them be changed.  
This way, if someone wanted to load the settings for a "Channel X" 
preset, except with a different Doppler spread, it could be done easily.


Note this is a similar problem as posted here:
https://lists.gnu.org/archive/html/discuss-gnuradio/2015-02/msg00016.html, 
 but it doesn't appear the previous question 
was ever answered.


Thank you in advance for your help.

Mark Arlinghaus


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It's not clear whether you're talking about *runtime* or during GRC 
construction.


For runtime, I'd write a little Python module that contains a function 
for each parameter:


setter_function(configfilename, command-line-parameter, 
widget-control-value)


You then have logic in the function to determine the priority of what 
gets returned:


config-->command-line-->widget-control-value

I've done that in the past.




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Re: [Discuss-gnuradio] Load Preset parameters in block

2016-06-20 Thread Mark Arlinghaus 
Hi Marcus,

Thank you for your quick response.  Sorry I wasn't clear.  I'm actually talking 
about GRC construction.  Once the code is running the parameters won't need to 
be changed.  If we need to change the parameters, stopping the flowgraph is 
acceptable.  It's really just meant to make the block slightly easier/faster to 
set up by the user.  I'm hoping that this makes the solution simpler!?

Mark

From: Discuss-gnuradio 
[discuss-gnuradio-bounces+marlinghaus=girdsystems@gnu.org] on behalf of 
Marcus D. Leech [mle...@ripnet.com]
Sent: Monday, June 20, 2016 3:09 PM
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] Load Preset parameters in block

On 06/20/2016 02:15 PM, Mark Arlinghaus wrote:
Hello,

Is there a way to load preset default parameters in a block.  For example, I 
have a channel model block that takes several parameters, such as the doppler 
spread, path delays, path gains, doppler spectrum, etc., and I want to have 
presets that will auto-populate the parameters in the GRC block for pre-defined 
channel models.  I can make a drop-down menu that has the pre-defined channel 
models, but I don't know how to change the values that populate in the other 
parameters.  I would like to do this using the xml file.  Is there a way to put 
a conditional parameter in the  tags that would depend on the setting in 
the drop down menu (It seems conditionals can be used in the  and 
 tags, but not inside the  tags)?  Is there a way to do it using 
the  tags?  Is there a list of valid options and what they do anywhere?  
It seems the  val:XXX <\opt> tags might do it, but I can't seem to get any 
of them to work.

Although I could pass in a preset parameter to the C++ function and simply 
override everything coming from the GUI, I'd rather have it populate the 
parameters in the block, but still let them be changed.  This way, if someone 
wanted to load the settings for a "Channel X" preset, except with a different 
Doppler spread, it could be done easily.

Note this is a similar problem as posted here:
https://lists.gnu.org/archive/html/discuss-gnuradio/2015-02/msg00016.html,
 but it doesn't appear the previous question was ever answered.

Thank you in advance for your help.

Mark Arlinghaus



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It's not clear whether you're talking about *runtime* or during GRC 
construction.

For runtime, I'd write a little Python module that contains a function for each 
parameter:

setter_function(configfilename, command-line-parameter, widget-control-value)

You then have logic in the function to determine the priority of what gets 
returned:

config-->command-line-->widget-control-value

I've done that in the past.


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Re: [Discuss-gnuradio] Load Preset parameters in block

2016-06-20 Thread Marcus D. Leech 

On 06/20/2016 02:15 PM, Mark Arlinghaus wrote:

Hello,

Is there a way to load preset default parameters in a block. For 
example, I have a channel model block that takes several parameters, 
such as the doppler spread, path delays, path gains, doppler spectrum, 
etc., and I want to have presets that will auto-populate the 
parameters in the GRC block for pre-defined channel models.  I can 
make a drop-down menu that has the pre-defined channel models, but I 
don't know how to change the values that populate in the other 
parameters.  I would like to do this using the xml file.  Is there a 
way to put a conditional parameter in the  tags that would 
depend on the setting in the drop down menu (It seems conditionals can 
be used in the  and  tags, but not inside the  
tags)? Is there a way to do it using the  tags?  Is there a list 
of valid options and what they do anywhere?  It seems the  
val:XXX <\opt> tags might do it, but I can't seem to get any of them 
to work.


Although I could pass in a preset parameter to the C++ function and 
simply override everything coming from the GUI, I'd rather have it 
populate the parameters in the block, but still let them be changed.  
This way, if someone wanted to load the settings for a "Channel X" 
preset, except with a different Doppler spread, it could be done easily.


Note this is a similar problem as posted here:
https://lists.gnu.org/archive/html/discuss-gnuradio/2015-02/msg00016.html, 
 
but it doesn't appear the previous question was ever answered.


Thank you in advance for your help.

Mark Arlinghaus


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Discuss-gnuradio@gnu.org
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It's not clear whether you're talking about *runtime* or during GRC 
construction.


For runtime, I'd write a little Python module that contains a function 
for each parameter:


setter_function(configfilename, command-line-parameter, 
widget-control-value)


You then have logic in the function to determine the priority of what 
gets returned:


config-->command-line-->widget-control-value

I've done that in the past.


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