Re: widget celltable how clear before re-populate

Hi John,

Is this applicable for DataGrid too?

Please see here for details.

Thanks,

Mohit

On Tuesday, 9 November 2010 01:11:35 UTC+5:30, Jeff Schwartz wrote:

Using one of the concrete classes AsyncDataProvider or ListDataProvider whose base class is AbstractDataProvider provides a very efficient mechanism for accessing your widget's underlying data source as well as for manipulating the display of the data itself.

Once a ListDataProvider is setup you can do similar to below:

dataProvider.getList().add(someObjectsList); // add a new SomeObject to the list
sortSomeObjectsList(dataProvider.getList()); // call a method to sort the list
dataProvider.refresh(); // tell all widgets using the data provider to refresh themselves because the data has changed

You can also add & replace lists in a ListDataProvider with:

dataProvider.setList(someObjectsList);

To set up a ListDataProvider:

ListDataProvider<SomeObject> dataProvider = new ListDataProvider<SomeObject>(); // strongly typed declaration - notice the use of type T in the declaration which is the type specifier for the type of objects in the list
dataProvider.setList(someObjectsList); // the list of objects to be provided by the ListDataProvider
dataProvider.addDataDisplay(myCellWidget); // the widget the ListDataProvider is providing the data to

Jeff

On Mon, Nov 8, 2010 at 1:22 PM, John LaBanca <jlab...@google.com> wrote:

You can push new data into the widget using CellTable#setRowData() in conjunction with CellTable#setRowCount().  If you want to clear the data first, do the following:

myCellTable.setRowCount(0); // Clears all data

myCellTable.setRowCount(20, true); // Set the size of the new data

myCellTable.setRowData(0, myData); // Set the new data

In GWT 2.1.1, there is a new method CellTable#setRowData(List) that clears all existing data and replaces it with the specified list.

Thanks,
John LaBanca
jlab...@google.com

On Mon, Nov 8, 2010 at 5:13 AM, alf <alber...@gmail.com> wrote:

we are render a celltable widget nice when i push a boton. the
problems is when i will push the botton again i create other widget
and adding. How can clear all item adn populate the sam widget with
new datas.

thanks and excuse for by bad english ans newbie question i have spent
hours fiding examples in doc

al

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