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/*
* Copyright 2000-2014 Vaadin Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.vaadin.tests.widgetset.client.grid;
import java.util.Arrays;
import java.util.List;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.RepeatingCommand;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.SimplePanel;
import com.vaadin.client.data.AbstractRemoteDataSource;
import com.vaadin.client.widget.grid.datasources.ListDataSource;
import com.vaadin.client.widgets.Grid;
import com.vaadin.client.widgets.Grid.Column;
public class GridDataChangeHandlerWidget extends Composite {
private final SimplePanel panel = new SimplePanel();
private final Grid<String> grid = new Grid<String>();
public static class DelayedDataSource extends ListDataSource<String> {
public DelayedDataSource(List<String> datasource) {
super(datasource);
}
@Override
public void ensureAvailability(final int firstRowIndex,
final int numberOfRows) {
new Timer() {
@Override
public void run() {
actualEnsureAvailability(firstRowIndex, numberOfRows);
}
}.schedule(500);
}
private void actualEnsureAvailability(int firstRowIndex,
int numberOfRows) {
super.ensureAvailability(firstRowIndex, numberOfRows);
}
}
public static class RemoteDelayedDataSource extends
AbstractRemoteDataSource<String> {
private List<String> rows;
public RemoteDelayedDataSource(List<String> datasource) {
super();
rows = datasource;
}
@Override
protected void requestRows(final int firstRowIndex,
final int numberOfRows,
final RequestRowsCallback<String> callback) {
new Timer() {
@Override
public void run() {
List<String> requested = rows.subList(firstRowIndex,
numberOfRows);
callback.onResponse(requested, requested.size());
}
}.schedule(500);
}
@Override
public Object getRowKey(String row) {
return row;
}
}
public GridDataChangeHandlerWidget() {
initWidget(panel);
panel.setWidget(grid);
grid.setDataSource(new RemoteDelayedDataSource(Arrays.asList("A", "B",
"C", "D", "E")));
grid.addColumn(new Column<String, String>("letter") {
@Override
public String getValue(String row) {
return row;
}
});
Scheduler.get().scheduleFinally(new RepeatingCommand() {
boolean run = false;
@Override
public boolean execute() {
grid.setDataSource(new DelayedDataSource(Arrays.asList("X",
"Y", "Z")));
if (run) {
return false;
}
run = true;
return true;
}
});
}
}
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