laxar-input-control
v3.0.0
Published
> An AngularJS directive that adds powerful interactive validation to form elements, for LaxarJS widgets.
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laxar-input-control
An AngularJS directive that adds powerful interactive validation to form elements, for LaxarJS widgets.
This directive can be used in combination with ngModel
to enrich a simple input field with type information in order to perform automatic syntactical validation, parsing and formatting.
Additionally it is possible to add semantic validators based on simple AngularJS directives using a simple interface of a controller defined within the input directive.
Whenever there is an error (be it semantic or syntactic) a tooltip is shown as long as the input field is focused.
Additionally the input field and its label (associated through nesting or by for
+id
attribute) receives the class ax-error
.
Installation
To use this control you should install it into your LaxarJS v2 project:
npm install --save laxar-input-control
This control only works for LaxarJS widget that are targeting AngularJS v1.
Usage
Add the axInput
directive to your form controls, along with ngModel
.
Supported value types for ax-input
are string
, decimal
, integer
, date
and time
.
Examples
A required decimal input with maximum value:
<input ng-model="someDecimal"
ax-input="decimal"
ax-input-maximum-value="100000"
ax-input-required="true">
A date input with value range and date picker UI. The latter requires the laxar-date-picker-control:
<input ng-model="someDate"
ax-input="date"
ax-input-range="'2010-01-02, 2014-03-01'"
ax-input-required="true"
ax-date-picker>
A decimal input with special formatting:
<input ng-model="someDecimal"
ax-input="decimal"
ax-input-formatting="{groupingSeparator: '_', decimalPlaces: 4}">
Builtin Validation Directives
Basic semantic validation directives that are already available are:
ax-input-required
(all types): Requires a value to be entered into the input fieldax-input-maximum-value="$maximum"
(all except string): requires the value to be below or equal to$maximum
. For dates the value'now'
can also be used.ax-input-minimum-value="$minimum"
(all except string): requires the value to be greater or equal to$minimum
. For dates also the value'now'
can be used.ax-input-range="$minimum, $maximum"
(all except string): requires the value to be greater or equal to$minimum
AND below or equal to$maximum
ax-input-maximum-length="$maximumLength"
(string only): requires the string's length to be below or equal to$maximumLength
ax-input-minimum-length="$minimumLength"
(string only): requires the string's length to be greater than or equal to$minimumLength
ax-input-tooltip-placement
(all types): if set, this string (left/right/bottom/top) is forwarded to the bootstrap tooltip component to determine tooltip placement on screen. Otherwise, the position is determined automatically depending on the type of form element and its position on screen (left/right for select boxes, top/bottom for other controls).ax-input-tooltip-on-parent
: if set, the tooltip is attached to the parent of the form control.ax-input-display-errors-immediately="$immediately"
: If$immediately
evaluates totrue
, validation errors are presented to the user immediately by CSS styling and tooltip. Otherwise, errors are only shown when the field has been changed (ngModelController.$dirty
) or after the eventaxInput.validate
has been received. The default istrue
but may be changed tofalse
in future major releases. It can be changed using the configurationcontrols.laxar-input-control.displayErrorsImmediately
.The complementary event
axInput.setPristine
may be broadcast to reset the (visual) validation state. It has the same effect as calling$setPristine()
on the AngularJS form controller or on the model controller associated with anaxInput
directive.
Writing a custom semantic validator is as easy as writing a directive requiring the axInputController and calling addSemanticValidator
with the validator function as first argument and an error message generator function as second argument.
A look at the included semantic validators should be sufficient to know how this works.
Formatting of the displayed value can be controlled using the ax-input-formatting
attribute.
This takes an object having the following entries:
- groupingSeparator (default:
.
): Grouping seperator for decimal and integer values - decimalSeparator (default:
,
): Decimal separator for decimal values - decimalPlaces (default: 2): Number of decimal places to display. Applies rounding if necessary.
- decimalTruncation (default:
FIXED
): How to treat insignificant decimal places (trailing zeros):FIXED
: uses a fraction length of exactlydecimalPlaces
, padding with zerosBOUNDED
: uses a fraction length up todecimalPlaces
, no paddingNONE
: unbounded fraction length (only limited by numeric precision), no padding
- dateFormat (default:
MM/DD/YYYY
): Format for date values - dateTwoDigitYearWrap (default: 68): the two digit year value where below or equal 20xx is assumed and above 19xx
- timeFormat: (default:
HH:mm
): Format for time values - dateFallbackFormats: an array of formats to try parsing the value when using
dateFormat
fails - timeFallbackFormats: an array of formats to try parsing the value when using
timeFormat
fails
Formats for date and time are given in Moment.js syntax.
Custom Validation Messages
The axInput
control comes with a default set of validation messages for its builtin validators, available for german (de
) and english (en
and en_GB
) localization.
Although we may add some more localizations in the future (hey, this could be the chance for your first contribution ;-)) it may always be necessary to use custom validation messages in a widget.
This can be achieved by using the axInputValidationMessage
directive.
Its value can be any valid AngularJS expression, that evaluates to either a map defining translations for any of the keys found in the provided messages.json file, or a single string that should be used for any kind of validation error.
Example: Using a simple constant within a template
<input ng-model="value"
ax-input="decimal"
ax-input-validation-message="'Please insert a correct decimal number.'">
Example: Binding to the scope of e.g. a widget
<input ng-model="value"
ax-input="decimal"
ax-input-validation-message="validationMessages">
$scope.value = 13;
$scope.validationMessages = {
SYNTAX_TYPE_DECIMAL: 'Insert a valid decimal number!',
// ... more messages
};