Event when a variable value changed

#1 · November 22, 2019, 9:32 pm

I'm currently working on a project that read values from an .xml file and display them.

The values are the similar format: unit="mm*1/1000" value="8846". I would like to display this both in original and in 8.846 mm format.

It seems easy, but the problem is, I can change the original (8846) value by modify the numbers in a text box, change a trackbar or push + or - buttons parallel. Of course, if the value changed by the text box, I can use the "Text Change" event to do this, if it's changed by trackbar the "Value Changed" event and so on. But I would like to display the mm format when I change any of them.

Is there any possibility to do the division simply by changing the variable value or should I write the script for every component what I use to set up the value?

Other (but not serious), that the .xml file is in UTF8 format, so the accented letters are not displayed correctly.

Thanks in advance.

#2 · November 23, 2019, 7:42 am

Hello,

You can define a subroutine for the mm-code and put the subroutine call everywhere you change the value.

You did not tell where/how you process/parse the XML. There would be the place to handle Format Problems.

Regards

Hans-Peter

#3 · November 23, 2019, 2:41 pm

Hello Hans-Peter,

thank you for your quick reply.

Currently I use this subroutine to do the job (original solution was the same as you mentioned):

:ServoPosInMM
Math "[iSelValueFServo]/1000" "-1" "[iFServoInMM]"
Return

But my problem, that I have to call the subroutine from every component's event list where values changed.

Plus, I have to handle 6 independent parameter (read -> display -> modify-> save to xml) so in this case I need 6 subroutines.

It's not a big deal, but if it was a simplier way (e.g. a script runs automatically when a variable value changed), the code could be smaller. No problem, the method remains the original.

In this xml file we stored several data and parameters for products loaded to a PLC.

I need to modify only 6 lines/product that contain the servo positions, not the whole xml file. To select the required lines and find the values I use your hpwControl plugin wich is a great stuff and does the job perfectly.

#4 · November 23, 2019, 8:03 pm

Hello!

You can use the asMonitor plugin (Andrey Solodyankin).

#5 · November 23, 2019, 10:26 pm

The problem is that there is no line feed. The plugin is Russian-speaking.

--

Somewhere there was a plugin to control file changes .. it would probably be better suited to solve such problems. --

Andrei (as3856)

#6 · November 24, 2019, 11:38 am

Hello Vadim and Andrei,

I've just tried this plugin, but because of Russian language wont' work properly in english version of NeoBook (I use an older version, not the VisualNeo) - as Andrei wrote before.

Thank you for your recommandations!

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#7 · November 24, 2019, 5:43 pm

@jncon

After November 27th I will do the translation. Until this time, very busy. You need to wait a bit.

#8 · November 28, 2019, 2:56 pm

@jncon

I made a help file using google translator.

I will be glad if you correct the translation and publish the corrected version of this file.

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#9 · November 29, 2019, 12:54 pm

Hello Vadim,

many thanks for your effort, I hope I can do it during next week.

BTW, I took a look at the file and it seems correct by and large.

#10 · November 29, 2019, 4:01 pm

Wonderful! :)

Event when a variable value changed - Forum

Event when a variable value changed