Package com.vaadin.flow.component.charts.events

Class PointDragStartEvent

java.lang.Object

java.util.EventObject

com.vaadin.flow.component.ComponentEvent<Chart>

com.vaadin.flow.component.charts.events.PointDragStartEvent

All Implemented Interfaces:

HasItem, HasSeries, Serializable

@DomEvent("point-drag-start")
public class PointDragStartEvent
extends ComponentEvent<Chart>
implements HasItem

Fired when starting to drag a point.

See Also:

• Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor	Description
PointDragStartEvent(Chart source, boolean fromClient, int seriesIndex, int pointIndex, String pointId, String category, Double start, Double end, String parent, Double x, Double y)

Method Summary

Modifier and Type	Method	Description
String	getCategory()
Instant	getEnd()
String	getItemId()	The ID of the series item that is associated with the event.
int	getItemIndex()	Returns the index of the series item, that is associated with this event, in HasSeries.getSeries().
String	getParent()
int	getSeriesItemIndex()	Returns the index of the series
Instant	getStart()
Double	getxValue()
Double	getyValue()

Methods inherited from class com.vaadin.flow.component.ComponentEvent

getSource, isFromClient, unregisterListener

Methods inherited from class java.util.EventObject

toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.vaadin.flow.component.charts.events.HasItem

getItem, getSource

Methods inherited from interface com.vaadin.flow.component.charts.events.HasSeries

getSeries

Constructor Details

PointDragStartEvent

public PointDragStartEvent(Chart source,
 boolean fromClient,
 @EventData("event.detail.point.series.index")
 int seriesIndex,
 @EventData("event.detail.point.index")
 int pointIndex,
 @EventData("event.detail.point.id")
 String pointId,
 @EventData("event.detail.point.category")
 String category,
 @EventData("event.detail.point.start")
 Double start,
 @EventData("event.detail.point.end")
 Double end,
 @EventData("event.detail.point.parent")
 String parent,
 @EventData("event.detail.point.x")
 Double x,
 @EventData("event.detail.point.y")
 Double y)

Method Details

getCategory

public String getCategory()

Specified by:

getCategory in interface HasItem

getItemIndex

public int getItemIndex()

Description copied from interface: HasItem

Returns the index of the series item, that is associated with this event, in HasSeries.getSeries(). Can be used to identify the item within the series.

Example for ListSeries:

 int itemIndex = event.getItemIndex();
 ListSeries series = (ListSeries) event.getSeries();
 Number datum = series.getData()[itemIndex];
 

Specified by:

getItemIndex in interface HasItem

Returns:

the index of the item in the series

See Also:

• HasItem.getItem()
• HasItem.getItemId()

getItemId

public String getItemId()

Description copied from interface: HasItem

The ID of the series item that is associated with the event. Can be used to identify the item within the series.

Example for NodeSeries:

 String id = this.getItemId();
 NodeSeries series = (NodeSeries) this.getSeries();
 Optional<Node> nodeForId = series.getNodes().stream()
         .filter(node -> node.getId().equals(id)).findFirst();
 

Only AbstractSeriesItem and Node support setting an ID. For other types of series items this property will always return null. For AbstractSeriesItem the ID is optional. Unless the developer has explicitly set an ID for the item associated with the event, this property will be null. See HasItem.getItem() or HasItem.getItemIndex() for alternatives.

Specified by:

getItemId in interface HasItem

Returns:

the ID of the series item associated with the event, or null if the series item has no ID

See Also:

• HasItem.getItem()
• HasItem.getItemIndex()

getSeriesItemIndex

public int getSeriesItemIndex()

Description copied from interface: HasSeries

Returns the index of the series

Specified by:

getSeriesItemIndex in interface HasSeries

Returns:

getStart

public Instant getStart()

Returns:

Supported only in Gantt charts: Returns the start date of the point at the moment the dragging started.

getEnd

public Instant getEnd()

Returns:

Supported only in Gantt charts: Returns the end date of the point at the moment the dragging started.

getParent

public String getParent()

Returns:

Returns the id of the point parent at the moment the dragging started.

getxValue

public Double getxValue()

Returns:

Returns the x value of the point at the moment the dragging started.

getyValue

public Double getyValue()

Returns:

Returns the y value of the point at the moment the dragging started.