Experimental Physics and
Industrial Control System

Andrew Rhyder <[email protected]> · Sat, 26 Mar 2011 17:47:14 +1100

Yes, you're right Emmanuel, nothing more is required but the QCaLabel.
Glad you like the documentation, although I'm sure you will quickly discover it is way shorter than it should be. Or was that your tongue-in-cheek point!
Andrew
________________________________________
From: [email protected] [[email protected]]
Sent: Friday, 25 March 2011 12:21 PM
To: Andrew Rhyder
Cc: EPICS tech-talk
Subject: Re: epicsqt first try

On 09:31 Tue 22 Mar     , Andrew Rhyder wrote:
> There is not much wrong with your code below, but I believe you always need to create widgets like QLabels (our EPICS flavor or otherwise) within a main window widget.

No need of main window
or layout
or "how to use Qt" book. ;-)

> Also, the CA connection is not established automatically, you have to call the 'activate()' method once the widget is created.

Ok, that was the missing part

#include <QApplication>
#include <QCaLabel.h>
int main(int argc, char *argv[])
{
  QApplication a(argc, argv);
  QCaLabel label("DMC2183:1:DscrptnSI");
  label.activate();
  label.show();
  return a.exec();
}

> Calling 'activate()' is a minor overhead that I would like to avoid for simple widgets that could otherwise just 'go' but allows for widgets that take multiple PVs and then require macro substitution to be applied to those PVs.

I love the ASgui utility
The documentation is quite good to get you started (once you find and read it ;)
I would love to see more advanced widgets.
Overall this ca_framework is...
... awesome!
--
Emmanuel
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System