Number Component

What it does

The number component is designed to enter integer or decimal numbers. See Currency for a similar component designed to enter currency amounts.

Number field with unit

Basic usage

You use the number component like a regular input field, for example:

<fr:number ref="my-number">
  <xf:label>Quantity</xf:label>
</fr:number>

Datatype

fr:number must be bound to either of:

  • xs:decimal
  • xs:integer [SINCE Orbeon Forms 2016.1]

Parameters

fr:number supports parameters, which you can set via properties or directly on fr:number:

  • prefix: optional prefix shown before the number
  • suffix: optional suffix shown after the number
  • digits-after-decimal: digits to show after the decimal point (by default 0, which means the number is an integer)
  • decimal-separator: single character to use as decimal separator
    • use . or , only
  • grouping-separator: single character to use as thousands separator separator (can be blank)
  • round-when-formatting: when formatting the number for display, whether to round the value to digits-after-decimal if there are more digits after the decimal point or not. The default is false.
    • SINCE Orbeon Forms 2016.1
    • Rounding uses the half to even method.
  • round-when-storing: when storing the number entered by the user, whether to round the value to digits-after-decimal if there are more digits after the decimal point or not. The default is false.
    • SINCE Orbeon Forms 2016.1
    • Rounding uses the half to even method.
  • pattern
    • SINCE Orbeon Forms 2016.1
    • overrides the HTML pattern attribute

These are the default values of the properties:

<property
    as="xs:string"
    name="oxf.xforms.xbl.fr.number.prefix"
    value=""/>
<property
    as="xs:string"
    name="oxf.xforms.xbl.fr.number.suffix"
    value=""/>
<property
    as="xs:string"
    name="oxf.xforms.xbl.fr.number.digits-after-decimal"
    value="0"/>
<property
    as="xs:string"
    name="oxf.xforms.xbl.fr.number.decimal-separator"
    value="."/>
<property
    as="xs:string"
    name="oxf.xforms.xbl.fr.number.grouping-separator"
    value=","/>
<property
    as="xs:boolean"
    name="oxf.xforms.xbl.fr.number.round-when-formatting"
    value="false"/>
<property
    as="xs:boolean"
    name="oxf.xforms.xbl.fr.number.round-when-storing"
    value="false"/>

Validation vs. formatting

The digits-after-decimal parameter controls how the value entered by the user gets formatted when the field displays it. This does not impact validation of the data at all.

[SINCE Orbeon Forms 2016.1]

In order to validate the number to have a specific number of decimal digits, the xxf:fraction-digits() function should be used.

Mobile support

[SINCE Orbeon Forms 2016.1]

On iOS, when the control identifies that the value is a non-negative integer, it shows a numeric keypad:

iOS numeric keypad

This is the case if:

Otherwise, the control shows the numeric pane of the regular keyboard:

iOS numeric keypad

Examples

Use of a suffix

Here is an example with a suffix:

Number field with suffix

<fr:number ref="my-number" suffix="m/s">
    <xf:label>Number</xf:label>
    <xf:hint>Number field with validation</xf:hint>
</fr:number>

Rounding

[SINCE Orbeon Forms 2016.1]

Rouding when formatting only

Assume the following properties or corresponding attributes:

<property
    as="xs:string"
    name="oxf.xforms.xbl.fr.number.digits-after-decimal"
    value="2"/>
<property
    as="xs:boolean"
    name="oxf.xforms.xbl.fr.number.round-when-formatting"
    value="true"/>
<property
    as="xs:boolean"
    name="oxf.xforms.xbl.fr.number.round-when-storing"
    value="false"/>

Scenario:

  • User types "12345.678".
  • Because round-when-storing is false, the value is not rounded and stored as is in the data.
  • When the user focuses out of the field, the value is formatted and rounded, because round-when-formatting is set to true.
  • Field displays "12,345.68".

This is useful if you want to keep the full precision of decimal values in the data, but format them nicely to a given number of decimals.

Rounding when formatting and when storing

Assume the following properties or corresponding attributes:

<property
    as="xs:string"
    name="oxf.xforms.xbl.fr.number.digits-after-decimal"
    value="2"/>
<property
    as="xs:boolean"
    name="oxf.xforms.xbl.fr.number.round-when-formatting"
    value="true"/>
<property
    as="xs:boolean"
    name="oxf.xforms.xbl.fr.number.round-when-storing"
    value="true"/>

Scenario:

  • User types "12345.678".
  • Because round-when-storing is true, the value is rounded and stored as "12345.68" in the data.
  • When the user focuses out of the field, the value is formatted and rounded, because round-when-formatting is set to true.
  • Field displays "12,345.68".

NOTE: Here rounding during formatting doesn't change the value since it was rounded when stored in the first place.

This is useful if you don't want to keep the full precision of decimal values in the data and want to force a maximum number of digits after the decimal point.

See also

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