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This page is for data modellers or application developers who want to apply special formatting to data that meets specific criteria.

Overview

A formatting rule allows you to specify an expression which evaluated can apply the selected style to the parent object. It allows to apply styles conditionally, depending on current values displayed on the screen.

A formatting rule can be applied to a view attribute or to a component. If you apply a formatting rule to a template, all components created from the template will have a copy of the formatting rule applied.

Basic Settings

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FieldDescription
Rule Expression

Expression to be evaluated on order to determine should the Style be applied. This expression takes PhixFlow Internal Variables including _current, _field, _itemNumber, _screen and _this.

See examples below. For more help on expressions, see Regular Expressions and Expressions and Scripts.

StyleStyle to be applied when the Rule Expression evaluates to true.
OrderOrder of the Rule Expression.
EnabledFlag showing is the Rule Expression enabled.
Stop If TrueFlag showing if other rules shouldn't be applied if the current Rule applies.

Example

For the Status Type attribute in a view, set the properties to:

Properties

For the Status Type attribute in a view, set the properties to:

  • Rule Expression:
    • either    _field.value == "OK"
    • or   _current.StatusSummary=="Validation Passed"
  • StyleBackgroundColour-LightGreen
  • Enabled
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_field.value == "OK" identifies the status type of OK and highlights the cell

_current.StatusSummary=="Validation Passed" identifies the status summary of Validation Passed and then highlights the corresponding status type cell.

Resulting View

This displays the OK field with a green background.

Formatting Rule Expressions

Variables

In formatting rules , the _form, _grid and _current act on a specific record. The record depends on the structure of components on the screen.


Formatting expression variableWhere
View directly on a screenform on a screenview on a formform on a cardgrid on a card
_form   acts on the record

na


currently displayed on the form

currently displayed on the formcurrently displayed on the card

backing the card
_grid  acts on the recordnanana
_current  acts on the recordcurrently displayed in the grid

nacurrently displayed in the gridcurrently displayed in the cardcurrently displayed in the grid


Functions

For quick changes to screen appearance, you want formatting rules to be evaluated quickly. To ensure a quick response, only use the attribute functions that are evaluated by the client rather than the server; see the list of Responsive Attribute Functions.