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package com.vaadin.tests.components.grid.basics;
import java.util.List;
import com.vaadin.data.provider.DataProvider;
import com.vaadin.data.provider.ListDataProvider;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractReindeerTestUI;
import com.vaadin.ui.Button;
import com.vaadin.ui.Grid;
/**
* @author Vaadin Ltd
*
*/
public class RefreshDataProvider extends AbstractReindeerTestUI {
@Override
protected void setup(VaadinRequest request) {
Grid<DataObject> grid = new Grid<>();
List<DataObject> data = DataObject.generateObjects();
ListDataProvider<DataObject> dataProvider = DataProvider
.ofCollection(data);
grid.setDataProvider(dataProvider);
grid.setDataProvider(dataProvider);
grid.addColumn(DataObject::getCoordinates).setCaption("Coordinates")
.setId("Coordinates");
addComponent(grid);
Button update = new Button("Update data",
event -> updateData(dataProvider, data));
update.setId("update");
addComponent(update);
Button add = new Button("Add data",
event -> addData(dataProvider, data));
add.setId("add");
addComponent(add);
Button remove = new Button("Remove data",
event -> removeData(dataProvider, data));
remove.setId("remove");
addComponent(remove);
}
private void updateData(DataProvider<DataObject, ?> dataProvider,
List<DataObject> data) {
data.get(0).setCoordinates("Updated coordinates");
dataProvider.refreshAll();
}
private void addData(DataProvider<DataObject, ?> dataProvider,
List<DataObject> data) {
DataObject dataObject = new DataObject();
dataObject.setCoordinates("Added");
data.add(0, dataObject);
dataProvider.refreshAll();
}
private void removeData(DataProvider<DataObject, ?> dataProvider,
List<DataObject> data) {
data.remove(0);
dataProvider.refreshAll();
}
}
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