topic Re: How to do javascript calculation in the form field in Alfresco Forum

How to do javascript calculation in the form field

sprincess — Thu, 09 Mar 2017 07:56:45 GMT

Hi, I'm new to Alfresco Activiti.I've already desgin a flow on activiti-app with a simple form.In the form, there are a textbox id named "cal", a dropdown field id named "quantity" and amount field named "amount".What I want to do is use javascript to do auto calculation when value is changed on the

Re: How to do javascript calculation in the form field

gdharley — Thu, 09 Mar 2017 20:06:38 GMT

Hi Mandy,

Based on your most recent inquiry I believe you have found the "helper" function, but as a matter of documentation here it is again:

scope.findFormFieldWithId(scope.allFormFields, 'quantity')

This will get you a JSON object and depending on the type of field it is you can retrieve the value, id or name.

Cheers,
Greg

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Re: How to do javascript calculation in the form field

sprincess — Fri, 10 Mar 2017 02:17:37 GMT

Many thanks for your kindly feedback.

I found it just by google, but it seems there are lack of information on google.

I wonder to know what is the "helper" function?

May I know where I could find it? thanks!

BR,

Mandy

Re: How to do javascript calculation in the form field

gdharley — Fri, 10 Mar 2017 15:49:16 GMT

Unfortunately nothing is documented. I had to find all this by crawling through the source.
There are a few "Helper" functions defined in render-form.js

1. setItemVisibility - runs the visibility logic for the form

2. findFormFieldWithId - locates a specific form field within a collection

3. prepareFormFields - populate data into typeahead, table, dropdown etc from defined REST calls.

Im sure there are others, but since none are documented, it is hard to know what is going to change in the future so have to be careful what you use.

Greg

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