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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; see Applying Formatting Rules for some examples.

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

Basic Settings

 

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Basic Settings

FieldDescription
Rule Expression

Expression to be evaluated on order to determine should the Style be applied. This expression takes PhixFlow Internal Variables. See examples below. For more help on expressions, see Regular Expressions and Expressions and PhixScripts.

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.

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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"
  • Style: BackgroundColour-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.

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Formatting Rule Expressions

Variables

In formatting rules, you can use the following Internal Variables.

  • To determine the maximised state of a screen, use _screen. In a formatting rule, use the state of this variable to set the button icon. This means the button can match the current maximised state of the
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  • To act on a specific record
, use: _form, _grid and _current. The record depends on the structure of components on the screen, as shown in the following table.
  • use one of the following:
Formatting expression variable
Where can the variable be used?

Description

View

directly on a screenform on a screenview on a formform on a cardgrid on a card

Form

Card

Form Fields

_form 

 acts

Acts on the record

na

Provides access the the data 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
na

.

e.g. _form.MyAttribute

n/a

Yes

Yes

Yes

_grid 

Acts on the record(s)

References the record currently selected on a grid.

e.g. _grid.MyColumn

Yes, can be used in actions to get details of the selected record.Yes, can be used to reference a selected grid item.Yes, can be used to reference a selected grid item.Yes, can be used to reference a selected grid item.

_current 

Acts on the record(s)


use _current in expressions for the CSS Properties of grid rows or cards.

e.g. _current.AnyColumn

currently displayed in the grid

n/acurrently displayed in the cardn/a

_selected 

Acts on the record

currently displayed in the grid

The currently selected item, i.e. The selected record or card.

e.g. _selected.AnyField

n/aCurrently selected field

Currently selected card or field on the card.

n/a

_field.Value

The value held in the form field.

The value held in the form field.

e.g. if _field.value > 100

n/aAccess the value in the fieldAccess the value in the fieldn/a

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.

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Learn More

For links to all pages in this topic, see Designing Screens.