Events

This section describes events fired by this widget.

disposing

Fires when the widget is being removed.

Event Handler Argument:
Provides function parameters.
Object structure:
component: Object
Provides access to the widget instance.
element: jQuery
An HTML element of the widget.
model: Object
Provides access to the data that is available for binding against the element. Available only in the Knockout approach.

Instead, you can use the onDisposing option to handle the event.

See Also
NOTE
This event fires only if the widget is removed using the remove(), empty(), or html() jQuery methods.

drawn

Fires when the widget has finished drawing itself.

Event Handler Argument:
Information about the event.
Object structure:
component: Object
The widget instance.
element: Object
The widget's container.
Cannot be used in themes.

exported

Fires after data from the widget is exported.

Event Handler Argument:
Information about the event.
Object structure:
component: Object
The widget instance.
element: jQuery
The widget's container.
model: Object
Data that is available for binding against the element. Available only in Knockout and AngularJS approaches.

To perform a custom action after data from the widget is exported, implement a handler for this event. For example, this handler can notify the user that the exporting has been completed. Within this handler, you can use the object passed to it as the parameter.

See Also
  • exporting - an event that fires before data from the widget is exported.
  • fileSaving - an event that fires before a file with exported data is saved on the user's local storage.

exporting

Fires before data from the widget is exported.

Event Handler Argument:
Information about the event.
Object structure:
component: Object
The widget instance.
element: jQuery
The widget's container.
model: Object
Data that is available for binding against the element. Available only in the Knockout approach.
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.

To perform a custom action before data from the widget is exported, implement a handler for this event. Within this handler, you can use the object passed to it as the parameter. For example, using the cancel field of this object, you can cancel exporting.

See Also
  • exported - an event that fires after data from the widget is exported.
  • fileSaving - an event that fires before a file with exported data is saved on the user's local storage.

fileSaving

Fires before a file with exported data is saved on the user's local storage.

Event Handler Argument:
Information about the event.
Object structure:
component: Object
The widget instance.
element: jQuery
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.

To perform a custom action before a file with exported data is saved on the user's local storage, implement a handler for this event. Within this handler, you can use the object passed to it as the parameter. For example, using the cancel field of this object, you can cancel file saving.

See Also
  • exporting - an event that fires before data from the widget is exported.
  • exported - an event that fires after data from the widget is exported.

incidentOccurred

Fires when an error or warning appears in a widget.

Event Handler Argument:
Information about the event.
Object structure:
component: Object
The widget instance.
element: Object
The widget's container.
target: Object
Information about the occurred incident.

When implementing a handling function for this event, you can access information about the occurred incident using the target field of the function's argument. 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 is any.
  • widget
    Contains the name of the widget that produced the error or warning.
  • version
    Contains the currently used version of the ChartJS library.
See Also

initialized

Raised only once, after the widget is initialized.

Event Handler Argument:
Information about the event.
Object structure:
component: Object
The widget instance.
element: jQuery
The widget's container.

Main article: onInitialized

See Also

optionChanged

Fires after an option of the component is changed.

Event Handler Argument:
Provides function parameters.
Object structure:
component: Object
Provides access to the widget instance.
name: String
Specifies the name of the option whose value is changed.
fullName: String
Specifies a full name of the option whose value is changed. The full name is formed by concatenating the names of the options that are presented in the hierarchy of the given option. The names are delimited by commas.
value: any
Specifies a new value for the option.
element: jQuery
An HTML element of the widget.
model: Object
Provides access to the data that is available for binding against the element. Available only in the Knockout approach.

Instead, you can use the onOptionChanged option to handle the event.

See Also

tooltipHidden

Fires when a sparkline's tooltip becomes hidden.

Event Handler Argument:
Information about the event.
Object structure:
component: Object
The widget instance.
element: Object
The widget's container.
Cannot be used in themes.

The sparkline's tooltip becomes invisible when a user moves the mouse cursor outside of the widget.

When a tooltip is made hidden, you can perform specific actions by handling this event. To do this, implement a handling function and assign it to the onTooltipHidden option. When implementing a handling function, use the object passed to it as its parameter. This object will provide you with the widget instance and its container.

See Also

tooltipShown

Fires when a sparkline tooltip appears.

Event Handler Argument:
Information about the event.
Object structure:
component: Object
The widget instance.
element: Object
The widget's container.
Cannot be used in themes.

The sparkline tooltip appears when a user hovers the mouse cursor over it.

When a tooltip appears, you can perform specific actions by handling this event. To do this, implement a handling function and assign it to the onTooltipShown* option. When implementing this function, use the object passed to it as its parameter. This object will provide you with the widget instance and its container.

See Also