Experimental Physics and
Industrial Control System

Peter Milne <[email protected]> · Fri, 21 Dec 2012 08:56:44 +0000

Hi John

We do this by adding a pause button with a javascript action to disable

the waveforms. It works, but the graph widget "pinks out", that's a

feature of course. Pavel's idea to disable at the IOC may be better, but

it does mean that all scope displays freeze, while the local disable is

just that, local.

Cheers

Peter

example javascript (8 traces on display):

importPackage(Packages.org.csstudio.opibuilder.scriptUtil);

var pause = display.getVar("pause");
var xygraph=display.getWidget("XY Graph");

if(pause == null || pause==false){
	display.setVar("pause", true);
	for (var tr = 0; tr < 8; ++tr){
		var key = "trace_"+tr+"_y_pv";
		display.setVar(key, xygraph.getPropertyValue(key));	
		xygraph.getPV(key).stop();
	}
	widget.setPropertyValue("text", "Resume");
}else{
	display.setVar("pause", false);
	for (var tr = 0; tr < 8; ++tr){
		var key = "trace_"+tr+"_y_pv";

		xygraph.setPropertyValue(key, display.getVar(key));
		xygraph.getPV(key).start();
	}
    widget.setPropertyValue("text", "Pause");
}

On 12/21/2012 07:41 AM, Pavel Maslov wrote:

Hi John,

Is there an option "Plot n points and stop" in CSS Boy?
Another solution would be to implement a record that will use the SDIS
field of your waveform record to switch it back and forth (1 to 0). So
you will click the button and it stops updating data from the scope.
Click again, and - presto! - new data has arrived.

On Fri, Dec 21, 2012 at 2:28 AM, John Dobbins <[email protected]
<mailto:[email protected]>> wrote:

    Hello All,

    I am using a CSS XY graph to display a waveform. The graph actually
    displays the last n values on the waveform presenting an
    oscilloscope like trace. I would like to be able to pause the
    display. Can someone recommend a way of doing this?

    Regards,

    John Dobbins

    Lab for Elementary Particle Physics
    Cornell University

--
Best regards,

Pavel Maslov, MS
Controls Engineer at Pulsed power Lab
Efremov Institute for Electro-Physical Apparatus
St. Petersburg, Russia

Mobile: +7 (951) 672 22 19
Landline: +7 (812) 461 01 01

--
Peter Milne			[email protected]
D-TACQ Solutions Ltd		www.d-tacq.com

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System