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XY Graph - Single series with different color [message #1786493]

Fri, 04 May 2018 11:49

Elip Dkc

Messages: 2
Registered: May 2018

Junior Member

I would like to change the color of trace line if it is in an alarm state, i.e., if it is higher or lower than some thd value such that the color should be red or green.

I don't know if it is possible but can you provide your suggestions, examples or some related documentation?

Thanks

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Re: XY Graph - Single series with different color [message #1786534 is a reply to message #1786493]

Sun, 06 May 2018 10:10

Wim Jongman

Messages: 493
Registered: July 2009

Senior Member

Hey Elip,

That should not be very hard. There are some snippets here [1], the GraphDemo should be a good starting point. Just copy the plain source and paste it into your source folder and run as java application or check out the project from git.

[1] http://git.eclipse.org/c/nebula/org.eclipse.nebula.git/plain/examples/org.eclipse.nebula.snippets/src/org/eclipse/nebula/snippets/visualization/

Cheers,

Wim

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Re: XY Graph - Single series with different color [message #1786536 is a reply to message #1786534]

Sun, 06 May 2018 13:59

Elip Dkc

Messages: 2
Registered: May 2018

Junior Member

Hi Wim,

Thanks for your response. But i think i didn't explain myself well. I already looked at these examples. They have multiple lines with different colors but i look for a single line with some parts red, some parts green.

It seems like:

http://www.woorimtech.com/img_up/shop_pds/adm1188/design/2014/golden/multiplecolorline.gif

[Updated on: Mon, 07 May 2018 07:09]

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Re: XY Graph - Single series with different color [message #1786620 is a reply to message #1786536]

Tue, 08 May 2018 14:52

Wim Jongman

Messages: 493
Registered: July 2009

Senior Member

You can add a listener to the data provider like so. I don't think you can change the line color of a trace but maybe you can add a figure on that point?

  trace2Provider.addDataProviderListener(provider -> {
			double yValue = provider.getSample(provider.getSize() - 1).getYValue();
			if (yValue < 0) {
				System.out.println("dropped below zero " + yValue);
			} else {
				System.out.println("dropped above zero " + yValue);
			}
		});

[Updated on: Tue, 08 May 2018 14:53]

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