Configuration

An object that defines configuration options for the LinearGauge widget.

animation

Specifies animation options.

Type:

Object

To make your gauge "live", enable animation for it by setting the enabled option of the animation object to true. In this instance, the gauge indicators will appear in motion. In addition, within the animation object, you can set an appropriate easing mode using the easing option and specify how long the animation should run using the duration option.

Show Example:
jQuery

In this example, the animation.duration option is changed to 2000 ms. In addition, the animation easing mode is changed to 'linear' using the animation.easing option. Switch between the radio buttons to see how the gauge animation performs with these settings.


                                    

                                    

containerBackgroundColor

Specifies the color of the parent page element.

Type:

String

Default Value: 'none'

Set this property to the color of the parent page element. Certain elements of the widget will use this color so that they coordinate with the page. Currently, different auxiliary separators use the container background color, so there is no need to set a custom color for them.

Show Example:
jQuery

In this example, the containerBackgroundColor option is set to olive.


                                    

                                    

elementAttr

Specifies the attributes to be attached to the widget's root element.

Type:

Object

Default Value: {}

You can configure this option in an ASP.NET MVC Control as follows:

Razor C#
Razor VB
@(Html.DevExtreme().WidgetName()
    .ElementAttr("class", "class-name")
    // ===== or =====
    .ElementAttr(new {
        @id = "elementId",
        @class = "class-name"
    })
    // ===== or =====
    .ElementAttr(new Dictionary<string, object>() {
        { "id", "elementId" },
        { "class", "class-name" }
    })

)
@(Html.DevExtreme().WidgetName() _
    .ElementAttr("class", "class-name")
    ' ===== or =====
    .ElementAttr(New With {
        .id = "elementId",
        .class = "class-name"
    })
    ' ===== or =====
    .ElementAttr(New Dictionary(Of String, Object) From {
        { "id", "elementId" },
        { "class", "class-name" }
    })
)

export

Configures the exporting and printing features.

Type:

Object

These features allow a user to export your widget into a document or print it. When exporting is enabled, the "Exporting/Printing" button appears in the widget. A click on it invokes a drop-down menu that lists exporting and printing commands. The following formats are supported for exporting into: PNG, PDF, JPEG, SVG and GIF.

NOTE
IE9 and Safari on Mac OS do not implement an API for saving files. Therefore, exporting in these browsers requires setting up a server-side proxy. For details, refer to the proxyUrl option description.
See Also

Watch Video

geometry

Specifies the options required to set the geometry of the LinearGauge widget.

Type:

Object

Show Example:
jQuery

In this example, the gauge is oriented vertically.


                                    

                                    

loadingIndicator

Configures the loading indicator.

Type:

Object

When the widget visualizes local data, loading is instant. But when the widget is bound to a remote data source, loading may takes a considerable amount of time. To keep the viewer's attention, the widget can display a loading indicator.

DevExtreme HTML5 Charts LoadingIndicator

To activate the loading indicator, assign true to the loadingIndicator.show option. Once data is loaded, the loading indicator will be hidden automatically.

See Also

margin

Generates space around the widget.

Type:

Object

WidgetMargin DevExtreme ChartJS

onDisposing

A handler for the disposing event. Executed when the widget is removed from the DOM using the remove(), empty(), or html() jQuery methods only.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null

onDrawn

A handler for the drawn event. Executed when the widget has finished drawing itself.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null
Cannot be used in themes.

onExported

A handler for the exported event. Executed after data from the widget is exported.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null

onExporting

A handler for the exporting event. Executed before data from the widget is exported.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

fileName:

String

The name of the file to which the widget is about to be exported.

cancel:

Boolean

Assign true to this field if you need to prevent exporting.

format:

String

The resulting file format. One of PNG, PDF, JPEG, SVG and GIF.

Default Value: null

onFileSaving

A handler for the fileSaving event. Executed before a file with exported data is saved on the user's local storage.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

element:

Element (jQuery or HTML)

The widget's container.

fileName:

String

The name of the file to be saved.

format:

String

The format of the file to be saved.
Possible Values: 'PNG' | 'PDF' | 'JPEG' | 'SVG' | 'GIF'

data:

BLOB

Exported data as a BLOB.

cancel:

Boolean

Assign true to this field if you need to prevent the file from being saved.

Default Value: null

onIncidentOccurred

A handler for the incidentOccurred event. Executed when an error or warning appears in the widget.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

target: any

Information about the occurred incident.

Default Value: null

When an error or warning appears, the widget notifies you by passing a message to the browser console. This message contains the ID of the incident, a brief description, and a link to the Errors and Warnings section where further information about this incident can be found. However, you can handle errors and warnings in the way that you require. To do this, implement a callback function performing the required actions and assign it to the onIncidentOccurred option. Within this function, you can use information about the incident that occurred. This information can be accessed from the target field of the object passed to the callback function as a parameter. This information includes the following.

  • id
    Contains the ID of the incident. The full list of IDs can be found in the Errors and Warnings section.
  • type
    Contains the type of the incident. This field equals "error" for errors or "warning" for warnings.
  • args
    Contains the argument of the incident's message. The content of this field varies greatly, depending on the incident. For example, it may contain the name of the data source field that was not specified correctly, or the name of the option that was not set properly.
  • text
    Contains the text passed to the browser console. This text includes the content of the args field, if there are any.
  • widget
    Contains the name of the widget that produced the error or warning.
  • version
    Contains the currently used version of the DevExtreme library.

onInitialized

A handler for the initialized event. Executed only once, after the widget is initialized.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

element:

Element (jQuery or HTML)

The widget's container.

Default Value: null

You cannot access elements in the widget because this handler is executed before they are ready. Use the onContentReady handler instead.

onOptionChanged

A handler for the optionChanged event. Executed after an option of the widget is changed.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

name:

String

The option's short name.

fullName:

String

The option's full name.

value: any

The option's new value.

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null

onTooltipHidden

A handler for the tooltipHidden event.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

target:

Object

The object containing the hovered indicator's index.

Default Value: null
Cannot be used in themes.

The indicator's tooltip becomes invisible when a user hovers the mouse cursor over another indicator or moves it outside the widget.

When a tooltip is made hidden, you can perform specific actions by handling the tooltipHidden event. To do this, implement a handling function and assign it to this option. When implementing a handling function, use the object passed to it as its parameter. This object will provide you with the widget instance, its container and the object describing the hovered indicator. You can use its index field to get the index of the hovered subvalue indicator (the index of the main value indicator is undefined).

onTooltipShown

A handler for the tooltipShown event.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

target:

Object

The object containing the hovered indicator's index.

Default Value: null
Cannot be used in themes.

The tooltip appears when a user hovers the mouse cursor over an indicator.

When a tooltip appears, you can perform specific actions by handling the tooltipShown event. To do this, implement a handling function and assign it to this option. When implementing this function, use the object passed to it as its parameter. This object will provide you with the widget instance, its container and the object describing the hovered indicator. You can use its index field to get the index of the hovered subvalue indicator (the index of the main value indicator is undefined).

pathModified

Notifies the widget that it is embedded into an HTML page that uses a tag modifying the path.

Type:

Boolean

Default Value: false
Cannot be used in themes.

If you place the widget on a page that uses a tag modifying the path (<base>, <iframe>, etc.), some of the widget elements may get mixed up or disappear. To solve this problem, set the pathModified option to true.

See Also

rangeContainer

Specifies gauge range container options.

Type:

Object

For the purpose of more intelligible data visualization, you can combine values into ranges and color each range differently. For instance, you can indicate the range of warm and cold temperatures. To set the ranges, assign an array of objects defining the ranges to the ranges property of the rangeContainer configuration object. In addition, you can specify the orientation of the ranges relative to an invisible scale line, and an offset from this line using the rangeContainer properties.

Show Example:
jQuery

In this example, a number of options within the rangeContainer configuration object is changed. The range container is divided into ranges that are defined by the ranges option. These ranges are moved from the scale to a 5-pixel distance using the offset option. In addition, the backgroundColor option is set to firebrick.


                                    

                                    

redrawOnResize

Specifies whether to redraw the widget when the size of the parent browser window changes or a mobile device rotates.

Type:

Boolean

Default Value: true
Cannot be used in themes.

When this option is set to true, the widget will be redrawn automatically in case the size of its parent window changes.

NOTE
To redraw the widget after the size of its container has changed, call the render() method of the widget's instance.

rtlEnabled

Switches the widget to a right-to-left representation.

Type:

Boolean

Default Value: false
Cannot be used in themes.

When this option is set to true, the widget text flows from right to left, and the layout of elements is reversed. To switch the entire application/site to the right-to-left representation, assign true to the rtlEnabled field of the object passed to the DevExpress.config(config) method.

JavaScript
DevExpress.config({
    rtlEnabled: true
});

scale

Specifies the gauge's scale options.

Type:

Object

To divide a scale, set its startValue and endValue properties. The scale's major and minor ticks will be calculated automatically. Major ticks will be shown by default. To show minor ticks, set their visible property to true. You can set custom major and minor tick intervals, show custom major and minor ticks, and format tick labels. These and other scale options are available in the scale configuration object.

Show Example:
jQuery

In this example, several options of the gauge scale are changed. The scale is divided using the startValue and endValue options. Both the major and minor scale ticks are colored in black. In addition, the scale labels are displayed in a currency format.


                                    

                                    

size

Specifies the widget's size in pixels.

Type:

Object

Default Value: undefined

The widget occupies its container's entire area by default. Use the size object to specify the widget's size if it should be different from that of its container. Assign 0 to size object's height and width options to hide the widget.

Show Example:
jQuery

In this example, the size of the LinearGauge widget is less than the container size.


                                    

                                    

subtitle

Deprecated

Use the subtitle option instead.

Specifies a subtitle for the widget.

Type:

Object

|

String

Use this property to set the text to be displayed as a gauge subtitle (the text below the title). If you need to specify the subtitle's font, assign an object to the subtitle property with the required options specified. In this instance, set the subtitle's text using the text property. When text is not specified for a subtitle, the widget is displayed without a subtitle.

subvalueIndicator

Specifies the appearance options of subvalue indicators.

Type:

Object

The LinearGauge widget can display one main value and several subvalues. The gauge's main value and subvalues are indicated by special pointers. You can customize the appearance of these pointers using the valueIndicator and subvalueIndicator configuration objects correspondingly.

The subvalue indicator is a pointer, which designates an extra value on a scale. There are several types of subvalue indicators. Set the required one by using the type option, and then specify the options that are specific to this type, if needed. To learn the options that can be specified for a particular type, refer to one of the following sections.

View Demo

Show Example:
jQuery

subvalues

Specifies a set of subvalues to be designated by the subvalue indicators.

Type:

Array<Number>

Default Value: undefined
Cannot be used in themes.

In addition to one main value, you can indicate several extra values on a gauge. These are called subvalues. To specify the subvalues, assign an array with them to the subvalues field.

You can obtain and change the subvalues at runtime. In order to do this, use the subvalues() and subvalues(subvalues) methods. Note that in that case, you need to initialize the subvalues option at least with an empty array.

JavaScript
var gaugeOptions = {
    // ...
    subvalues: []    
}

Subvalues are designated by subvalue indicators. You can customize the appearance of these indicators using the subvalueIndicator configuration object.

Show Example:
jQuery

In this example, several subvalues are displayed on the gauge.


                                    

                                    

theme

Sets the name of the theme the widget uses.

Type:

String

Default Value: 'generic.light'
Accepted Values: 'generic.light' | 'generic.dark' | 'generic.contrast' | 'generic.carmine' | 'generic.darkmoon' | 'generic.softblue' | 'generic.darkviolet' | 'generic.greenmist' | 'android5.light' | 'ios7.default'

A theme is a widget configuration that gives the widget a distinctive appearance. Use can use one of the predefined themes or create a custom one. Changing the option values in the widget's configuration object overrides the theme's corresponding values.

NOTE
The following themes were deprecated or renamed: 'desktop', 'desktop-dark', 'android', 'android-holo-light', 'ios', 'win8', 'win8-white', 'win8.white', 'win8.black'. In new applications, use themes listed in the accepted values.

When using the widget as an ASP.NET MVC Control, specify this option using the VizTheme enum. This enum accepts the following values: GenericLight, GenericDark, GenericContrast, GenericCarmine, GenericDarkMoon, GenericSoftBlue, GenericDarkViolet, GenericGreenMist, Android5Light, IOS7Default, Win10Black and Win10White.

Show Example:
jQuery

In this example, a custom theme is implemented and applied to a gauge. In addition, you can change the type of the value indicator using the drop-down menu under the gauge. Note that options for the value indicator of each type are specified in separate objects within the gauge.valueIndicator configuration object.


                                    

                                    

title

Configures the widget's title.

Type:

Object

|

String

The widget's title is a short text that usually indicates what is visualized. If you need to specify the title's text only, assign it directly to the title option. Otherwise, set this option to an object with the text and other fields specified.

The title can be accompanied by a subtitle elaborating on the visualized subject using the title.subtitle object.

Show Example:
jQuery

In this example, the title text is assigned directly to the title field.


                                    

                                    

tooltip

Configures tooltips.

Type:

Object

A tooltip is a miniature rectangle displaying the value of a gauge's indicator. A tooltip appears when the end-user hovers the cursor over an indicator. You can enable/disable tooltips, change their appearance and format their text using fields of the tooltip configuration object.

Show Example:
jQuery

In this example, a number of the tooltip options are changed. The tooltip value is displayed in a currency format with the precision of 2. In addition, the font size and weight options are changed. To see the tooltip, hover over the red range bar.


                                    

                                    

value

Specifies the main value on a gauge.

Type:

Number

Default Value: undefined
Cannot be used in themes.

The main value is designated by the value indicator. To customize the appearance of the value indicator, use the valueIndicator configuration object.

You can obtain and change the gauge value at runtime. In order to do this, use the value() and value(value) methods.

Only one main value can be indicated on a gauge. Besides the main gauge value, you can indicate several extra values. Refer to the subvalues option description for more information.

Show Example:
jQuery

valueIndicator

Specifies the appearance options of the value indicator.

Type:

Object

The value indicator is a pointer that designates the main value of the gauge. There are several types of value indicators. Set the required one by using the type option, and then specify the options that are specific to this type, if needed. To learn about the options that can be specified for a particular type, refer to one of the following sections.

View Demo

Show Example:
jQuery

In this example, the gauge value is indicated by a circle. The appearance of this circle is customized using the color and length options.