com.vaadin.client.data

Class SimpleDataChangeHandler

java.lang.Object

com.vaadin.client.data.SimpleDataChangeHandler

All Implemented Interfaces:

DataChangeHandler

public class SimpleDataChangeHandler
extends Object
implements DataChangeHandler

Helper class for creating a DataChangeHandler for a Widget that does not support lazy loading.

Since:

8.0

Author:

Vaadin Ltd

Method Summary

Modifier and Type	Method and Description
void	dataAdded(int firstRowIndex, int numberOfRows) Called when the new rows have been added to the container.
void	dataAvailable(int firstRowIndex, int numberOfRows) Called when rows requested with DataSource.ensureAvailability(int, int) rows are available.
void	dataRemoved(int firstRowIndex, int numberOfRows) Called when rows have been removed from the data source.
void	dataUpdated(int firstRowIndex, int numberOfRows) Called when the contents of the data source has changed.
void	resetDataAndSize(int newSize) Resets all data and defines a new size for the data.

Methods inherited from class java.lang.Object

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

Method Detail

dataUpdated

public void dataUpdated(int firstRowIndex,
                        int numberOfRows)

Description copied from interface: DataChangeHandler

Called when the contents of the data source has changed. If the number of rows has changed or if rows have been moved around, DataChangeHandler.dataAdded(int, int) or DataChangeHandler.dataRemoved(int, int) should ideally be used instead.

Specified by:

dataUpdated in interface DataChangeHandler

Parameters:

firstRowIndex - the index of the first changed row

numberOfRows - the number of changed rows

dataRemoved

public void dataRemoved(int firstRowIndex,
                        int numberOfRows)

Description copied from interface: DataChangeHandler

Called when rows have been removed from the data source.

Specified by:

dataRemoved in interface DataChangeHandler

Parameters:

firstRowIndex - the index that the first removed row had prior to removal

numberOfRows - the number of removed rows

dataAdded

public void dataAdded(int firstRowIndex,
                      int numberOfRows)

Description copied from interface: DataChangeHandler

Called when the new rows have been added to the container.

Specified by:

dataAdded in interface DataChangeHandler

Parameters:

firstRowIndex - the index of the first added row

numberOfRows - the number of added rows

dataAvailable

public void dataAvailable(int firstRowIndex,
                          int numberOfRows)

Description copied from interface: DataChangeHandler

Called when rows requested with DataSource.ensureAvailability(int, int) rows are available.

Specified by:

dataAvailable in interface DataChangeHandler

Parameters:

firstRowIndex - the index of the first available row

numberOfRows - the number of available rows

resetDataAndSize

public void resetDataAndSize(int newSize)

Description copied from interface: DataChangeHandler

Resets all data and defines a new size for the data.

This should be used in the cases where the data has changed in some unverifiable way. I.e. "something happened". This will lead to a re-rendering of the current Grid viewport

Specified by:

resetDataAndSize in interface DataChangeHandler

Parameters:

newSize - the estimated size of the new data set