Element: <oj-led-gauge>

Oracle® JavaScript Extension Toolkit (JET)
18.1.0
G25382-01

Since:
  • 0.7.0
Module:
  • ojgauge

Note: This component is deprecated since 13.1.0. Use Badge classes or icons instead.

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Attributes

Methods

Type Definitions

Other Topics


JET LED Gauge

LED gauges are used to highlight a specific metric value in relation to its thresholds.


<oj-led-gauge
  value='63'
  min='0'
  max='100'
  thresholds='[{"max": 33}, {"max": 67}, {}]'>
</oj-led-gauge>

Touch End User Information

This element has no touch interaction.

Keyboard End User Information

This element has no keyboard interaction.

Performance

Tracking Resize

By default, the element will track resizes and render at the new size. This functionality adds a small overhead to the initial render for simple elements like gauges or spark charts, which become noticable when using large numbers of these simple elements. To disable resize tracking, set trackResize to off. The application can manually request a re-render at any time by calling the refresh function.

Accessibility

The application is responsible for populating the shortDesc value in the component properties object with meaningful descriptors when the component does not provide a default descriptor.

Reading direction

As with any JET component, in the unusual case that the directionality (LTR or RTL) changes post-init, the component must be refresh()ed.


Usage

Signature:

interface LedGaugeElement

Typescript Import Format
//To typecheck the element APIs, import as below.
import { LedGaugeElement } from "ojs/ojgauge";

//For the transpiled javascript to load the element's module, import as below
import "ojs/ojgauge";

For additional information visit:

Note: Application logic should not interact with the component's properties or invoke its methods until the BusyContext indicates that the component is ready for interaction.


Styling

CSS Variables

See JET CSS Variables for additional details.
metricLabel
Name Type Description
----oj-gauge-metric-label-font-weight <font_weight> Font weight for metric label.
markerSize
Name Type Description
--oj-led-gauge-sm-size <length> Led gauge small size
--oj-led-gauge-md-size <length> Led gauge medium size
--oj-led-gauge-lg-size <length> Led gauge large size

Slots

JET components that allow child content support slots. Please see the slots section of the JET component overview doc for more information on allowed slot content and slot types.

contextMenu

The contextMenu slot is set on the oj-menu within this element. This is used to designate the JET Menu that this component should launch as a context menu on right-click, Shift-F10, Press & Hold, or component-specific gesture. If specified, the browser's native context menu will be replaced by the JET Menu specified in this slot.

The application can register a listener for the Menu's ojBeforeOpen event. The listener can cancel the launch via event.preventDefault(), or it can customize the menu contents by editing the menu DOM directly, and then calling refresh() on the Menu.

To help determine whether it's appropriate to cancel the launch or customize the menu, the ojBeforeOpen listener can use component API's to determine which table cell, chart item, etc., is the target of the context menu. See the JSDoc of the individual components for details.

Keep in mind that any such logic must work whether the context menu was launched via right-click, Shift-F10, Press & Hold, or component-specific touch gesture.

tooltipTemplate

The tooltipTemplate slot is used to specify custom tooltip content. The slot content must be a single <template> element. This slot takes precedence over the tooltip.renderer property if specified.

When the template is executed, the component's binding context is extended with the following properties:

  • $current - an object that contains information for the gauge. (See oj.ojLedGauge.TooltipContext or the table below for a list of properties available on $current)
Properties of $current:
Name Type Description
color string The indicator color of the gauge.
componentElement Element The LED gauge HTML element.
label string The computed metric label.
parentElement Element The tooltip element. The function can directly modify or append content to this element.

Attributes

border-color :string

The border color of the gauge. Only applies when thresholds are not defined. The default value varies based on theme.
Names
Item Name
Property borderColor
Property change event borderColorChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-border-color-changed

color :string

The color of the gauge. Only applies when thresholds are not defined. The default value varies based on theme.
Names
Item Name
Property color
Property change event colorChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-color-changed

label :Object

An object defining the label.
Names
Item Name
Property label
Property change event labelChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-label-changed

label.style :Partial<CSSStyleDeclaration>

The CSS style object defining the style of the label. The following style properties are supported: color, cursor, fontFamily, fontSize, fontStyle, fontWeight, textDecoration.
Default Value:
  • {}
Names
Item Name
Property label.style

(nullable) label.text :string

The text for the label.
Default Value:
  • ""
Names
Item Name
Property label.text

marker-size :"sm"|"md"|"lg"|"fit"

Specifies the size of the led gauge.
Supported Values:
Value Description
fit The size of the led will be determined based on application styling. If no explicit component size is specified, a default size will be used.
lg Large size, as determined by the theme, will be used for the gauge.
md Medium size, as determined by the theme, will be used for the gauge.
sm Small size, as determined by the theme, will be used for the gauge.
Default Value:
  • "fit"
Names
Item Name
Property markerSize
Property change event markerSizeChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-marker-size-changed

max :number

The maximum value of the gauge.
Default Value:
  • 100
Names
Item Name
Property max
Property change event maxChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-max-changed

metric-label :Object

An object defining the value label.
Names
Item Name
Property metricLabel
Property change event metricLabelChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-metric-label-changed

(nullable) metric-label.converter :oj.Converter.<string>

The converter used to format the labels. When using a converter, scaling should be set to none, as the formatted result may not be compatible with the scaling suffixes.
Default Value:
  • null
Names
Item Name
Property metricLabel.converter

(nullable) metric-label.rendered :string

Defines if the label is rendered.
Supported Values:
Value
off
on
Default Value:
  • "off"
Names
Item Name
Property metricLabel.rendered

(nullable) metric-label.scaling :string

The scaling behavior of the labels. When using a converter, scaling should be set to none, as the formatted result may not be compatible with the scaling suffixes.
Supported Values:
Value
auto
billion
million
none
quadrillion
thousand
trillion
Default Value:
  • "auto"
Names
Item Name
Property metricLabel.scaling

metric-label.style :Partial<CSSStyleDeclaration>

The CSS style object defining the style of the label. The following style properties are supported: color, cursor, fontFamily, fontSize, fontStyle, fontWeight, textDecoration.
Default Value:
  • {}
Names
Item Name
Property metricLabel.style

(nullable) metric-label.text :string

The text for the label. If specified, text will overwrite the numeric value that is displayed by default. The converter, scaling, and textType attributes are ignored when text is specified.
Default Value:
  • ""
Names
Item Name
Property metricLabel.text

(nullable) metric-label.text-type :string

Defines whether the label is a number or a percentage of the total value.
Supported Values:
Value
number
percent
Default Value:
  • "number"
Names
Item Name
Property metricLabel.textType

min :number

The minimum value of the gauge.
Default Value:
  • 0
Names
Item Name
Property min
Property change event minChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-min-changed

rotation :90|180|270|0

The rotation angle for the gauge. Useful for changing the direction of triangle or arrow gauges.
Supported Values:
Value
0
180
270
90
Default Value:
  • 0
Names
Item Name
Property rotation
Property change event rotationChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-rotation-changed

size :number

Fraction of area to use. Values range from 0 to 1.
Default Value:
  • 1
Names
Item Name
Property size
Property change event sizeChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-size-changed

svg-class-name :string

The CSS style class to apply to the gauge. The style class and inline style will override any other styling specified through the properties. For tooltip interactivity, it's recommended to also pass a representative color to the color attribute.
Default Value:
  • ""
Names
Item Name
Property svgClassName
Property change event svgClassNameChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-svg-class-name-changed

svg-style :Partial<CSSStyleDeclaration>

The inline style to apply to the gauge. The style class and inline style will override any other styling specified through the properties. For tooltip interactivity, it's recommended to also pass a representative color to the color attribute. Only SVG CSS style properties are supported.
Default Value:
  • {}
Names
Item Name
Property svgStyle
Property change event svgStyleChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-svg-style-changed

thresholds :Array.<oj.ojLedGauge.Threshold>

An array of objects with the following properties defining the thresholds for the gauge.
Default Value:
  • []
Names
Item Name
Property thresholds
Property change event thresholdsChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-thresholds-changed

tooltip :Object

An object containing an optional callback function for tooltip customization.
Names
Item Name
Property tooltip
Property change event tooltipChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-tooltip-changed

tooltip.renderer :((context: ojLedGauge.TooltipContext) => ({insert: Element|string}|{preventDefault: boolean}))

A function that returns a custom tooltip. The function takes a tooltip context argument, provided by the gauge, and should return an object that contains only one of the two properties:
  • insert: HTMLElement | string - An HTML element, which will be appended to the tooltip, or a tooltip string.
  • preventDefault: true - Indicates that the tooltip should not be displayed. It is not necessary to return {preventDefault:false} to display tooltip, since this is a default behavior.
Default Value:
  • null
Names
Item Name
Property tooltip.renderer

track-resize :"on"|"off"

Defines whether the element will automatically render in response to changes in size. If set to off, then the application is responsible for calling refresh to render the element at the new size.
Supported Values:
Value
off
on
Default Value:
  • "on"
Names
Item Name
Property trackResize
Property change event trackResizeChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-track-resize-changed

translations :object|null

A collection of translated resources from the translation bundle, or null if this component has no resources. Resources may be accessed and overridden individually or collectively, as seen in the examples.

If the component does not contain any translatable resource, the default value of this attribute will be null. If not, an object containing all resources relevant to the component.

If this component has translations, their documentation immediately follows this doc entry.

Names
Item Name
Property translations
Property change event translationsChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-translations-changed

(nullable) translations.accessible-contains-controls :string

Used to describe a container that contains controls.

See the translations attribute for usage examples.

Since:
  • 13.0.0
Names
Item Name
Property translations.accessibleContainsControls

(nullable) translations.component-name :string

Used to describe the data visualization type for accessibility.

See the translations attribute for usage examples.

Default Value:
  • "Gauge"
Names
Item Name
Property translations.componentName

(nullable) translations.label-and-value :string

Used to display a label and its value.

See the translations attribute for usage examples.

Default Value:
  • "{0}: {1}"
Names
Item Name
Property translations.labelAndValue

(nullable) translations.label-clear-selection :string

Text shown for clearing multiple selection on touch devices.

See the translations attribute for usage examples.

Default Value:
  • "Clear Selection"
Names
Item Name
Property translations.labelClearSelection

(nullable) translations.label-count-with-total :string

Used to display a count out of a total.

See the translations attribute for usage examples.

Default Value:
  • "{0} of {1}"
Names
Item Name
Property translations.labelCountWithTotal

(nullable) translations.label-data-visualization :string

Label for data visualizations used for accessibility.

See the translations attribute for usage examples.

Default Value:
  • "Data Visualization"
Names
Item Name
Property translations.labelDataVisualization

(nullable) translations.label-invalid-data :string

Text shown when the component receives invalid data.

See the translations attribute for usage examples.

Default Value:
  • "Invalid data"
Names
Item Name
Property translations.labelInvalidData

(nullable) translations.label-no-data :string

Text shown when the component receives no data.

See the translations attribute for usage examples.

Default Value:
  • "No data to display"
Names
Item Name
Property translations.labelNoData

(nullable) translations.state-collapsed :string

Used to describe the collapsed state for accessibility.

See the translations attribute for usage examples.

Default Value:
  • "Collapsed"
Names
Item Name
Property translations.stateCollapsed

(nullable) translations.state-drillable :string

Used to describe a drillable object for accessibility.

See the translations attribute for usage examples.

Default Value:
  • "Drillable"
Names
Item Name
Property translations.stateDrillable

(nullable) translations.state-expanded :string

Used to describe the expanded state for accessibility.

See the translations attribute for usage examples.

Default Value:
  • "Expanded"
Names
Item Name
Property translations.stateExpanded

(nullable) translations.state-hidden :string

Used to describe the hidden state for accessibility.

See the translations attribute for usage examples.

Default Value:
  • "Hidden"
Names
Item Name
Property translations.stateHidden

(nullable) translations.state-isolated :string

Used to describe the isolated state for accessibility.

See the translations attribute for usage examples.

Default Value:
  • "Isolated"
Names
Item Name
Property translations.stateIsolated

(nullable) translations.state-maximized :string

Used to describe the maximized state for accessibility.

See the translations attribute for usage examples.

Default Value:
  • "Maximized"
Names
Item Name
Property translations.stateMaximized

(nullable) translations.state-minimized :string

Used to describe the minimized state for accessibility.

See the translations attribute for usage examples.

Default Value:
  • "Minimized"
Names
Item Name
Property translations.stateMinimized

(nullable) translations.state-selected :string

Used to describe the selected state for accessibility.

See the translations attribute for usage examples.

Default Value:
  • "Selected"
Names
Item Name
Property translations.stateSelected

(nullable) translations.state-unselected :string

Used to describe the unselected state for accessibility.

See the translations attribute for usage examples.

Default Value:
  • "Unselected"
Names
Item Name
Property translations.stateUnselected

(nullable) translations.state-visible :string

Used to describe the visible state for accessibility.

See the translations attribute for usage examples.

Default Value:
  • "Visible"
Names
Item Name
Property translations.stateVisible

type :"arrow"|"diamond"|"square"|"rectangle"|"triangle"|"star"|"human"|"circle"|string

The shape of the LED gauge. Can take the name of a built-in shape or the SVG path commands for a custom shape.
Supported Values:
Value Argument
arrow <optional>
circle <optional>
diamond <optional>
human <optional>
rectangle <optional>
square <optional>
star <optional>
triangle <optional>
Default Value:
  • "circle"
Names
Item Name
Property type
Property change event typeChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-type-changed

value :number|null

The metric value.
Supports writeback:
  • true
Names
Item Name
Property value
Property change event valueChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-value-changed

visual-effects :"none"|"auto"

Defines whether the theme specific visual effects such as overlays and gradients are applied to the gauge.
Supported Values:
Value
auto
none
Default Value:
  • "auto"
Names
Item Name
Property visualEffects
Property change event visualEffectsChanged
Property change listener attribute (must be of type function, see Events and Listeners for additional information.) on-visual-effects-changed

Methods

getMetricLabel : {string}

Returns the gauge's formatted metric label.
Returns:

The formatted metric label.

Type
string

getProperty(property) : {any}

Retrieves the value of a property or a subproperty. The return type will be the same as the type of the property as specified in this API document. If the method is invoked with an incorrect property/subproperty name, it returns undefined.
Parameters:
Name Type Description
property string The property name to get. Supports dot notation for subproperty access.
Since:
  • 4.0.0
Returns:
Type
any
Example

Get a single subproperty of a complex property:

let subpropValue = myComponent.getProperty('complexProperty.subProperty1.subProperty2');

refresh : {void}

Refreshes the component.
Returns:
Type
void

setProperties(properties) : {void}

Performs a batch set of properties. The type of value for each property being set must match the type of the property as specified in this API document.
Parameters:
Name Type Description
properties Object An object containing the property and value pairs to set.
Since:
  • 4.0.0
Returns:
Type
void
Example

Set a batch of properties:

myComponent.setProperties({"prop1": "value1", "prop2.subprop": "value2", "prop3": "value3"});

setProperty(property, value) : {void}

Sets a property or a subproperty (of a complex property) and notifies the component of the change, triggering a [property]Changed event. The value should be of the same type as the type of the attribute mentioned in this API document.
Parameters:
Name Type Description
property string The property name to set. Supports dot notation for subproperty access.
value any The new value to set the property to.
Since:
  • 4.0.0
Returns:
Type
void
Example

Set a single subproperty of a complex property:

myComponent.setProperty('complexProperty.subProperty1.subProperty2', "someValue");

Type Definitions

Threshold

Properties:
Name Type Argument Description
borderColor string <optional>
 The border color of the threshold.
color string <optional>
 The color of the threshold.
max number <optional>
 The upper bound of the threshold. This value is ignored for the final threshold, which uses the maximum value of the gauge.
shortDesc string <optional>
 Specific description for the threshold and overwrites the shortDesc specified on gauge. This is used for accessibility and also for customizing the tooltip text.

TooltipContext

Properties:
Name Type Description
color string The indicator color of the gauge.
componentElement Element The LED gauge HTML element.
label string The computed metric label.
parentElement Element The tooltip element. The function can directly modify or append content to this element.