[IDEA] add a 'format' attribute to EditTextWidget (and maybe others)

[ittayd]

Is your feature request related to a problem? Please describe.
When creating calculatros, a lot of time a field will hold an accurate number (e.g. 293.70629370629365), but I want to see something rounded (293.71). The accurate number may come because of some calculation derived from other fields (the edit text widget is used to override it, so then the user can type what they want)

Describe the solution you'd like
A format attribute can hold a filter to format the value before setting it in the input element.

Describe alternatives you've considered

Additional context

[kookma]

I think when you store the value in the field you can format it!
In other words, if the meaningful number of digits after floating point is 2, then storing and calculating with 16 digits has no meaning!

[pmario]

We do have the "fixed" operator https://tiddlywiki.com/#fixed%20Operator that will allow you to change the value in the field when storing it.

But

I think what you really want is to keep the "exact" number in the field and just show it with a fixed value.

I think that request is valid.

But we have to define, how the input-field should behave if it gets focus.

• Should it show the "fixed" value - or
• should it show the "real" value

IMO this depends on what should be done with those values. As soon as money comes into play these questions become important. Because:

• rounding up 10 values and then adding them is significantly different to
• adding 10 values and then rounding up the sum

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An other question is:

• What if the value is an integer and should be formatted eg: 10.00 without converting it to a float.
• So the input 20 has to write the value 2000 into the field

So while the request seems to be a simple modification. IMO it is not. There will be quite some thinking, which has to go into it.