On Thu, Mar 19, 2015 at 9:26 AM, Murphy, John <jmur...@comsonics.com> wrote:
> Hello GNU Radio'ers, > > I have a GRC flowgraph with a custom C++ block that feeds a stream of > vectors of floats to the QT GUI Vector Sink. Which particular internal > vector of floats gets streamed out of the custom C++ block is set on > the fly from a QT GUI Chooser. I am using the autoscale on the QT GUI > Vector Sink. > > The autoscale is okay but I do come up against shortcomings with it > and I could do better if I could somehow have the C++ code for the > custom C++ block (or the stuff in the GRC flowgraph, but that seems > more difficult to me) call some function to change the QT GUI Vector > Sink Y Axis Min and Max on the fly when the param choosing the vector > is changed. > > Would someone please indicate how to do this, if it can be done? And > perhaps provide a link to a similar example on the web to work from, > if such exists? > > Thanks, > John > In the Vector Sink's properties, you can set a variable for the y-min and y-max. When you change the variable (via a slider or in any other way), it will change the y axis settings. Tom
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