Vaadin 8.1 - Grid Drag and Drop example

gistfile1.txt

package com.example;

import com.vaadin.shared.ui.grid.DropMode;
import com.vaadin.ui.Grid;
import com.vaadin.ui.GridDragSource;
import com.vaadin.ui.GridDropTarget;
import com.vaadin.ui.VerticalLayout;

import java.util.List;

/**
 * @author Alejandro Duarte.
 */
public class GridDragAndDrop extends VerticalLayout {

    private Service service = new Service();
    private List<Person> people = service.findAll();
    private Person dragged = null;

    public GridDragAndDrop() {

        Grid<Person> grid = new Grid<>(Person.class);
        grid.setWidth("360px");
        grid.setHeight("300px");
        grid.setColumns("id", "firstName");
        grid.getColumn("id").setWidth(100);
        grid.setItems(people);

        GridDragSource<Person> source = new GridDragSource<>(grid);
        source.addGridDragStartListener(e -> {
            dragged = e.getDraggedItems().iterator().next();
        });

        GridDropTarget<Person> target = new GridDropTarget<>(grid, DropMode.ON_TOP_OR_BETWEEN);
        target.addGridDropListener(e -> {
            int index = people.indexOf(e.getDropTargetRow());
            people.remove(dragged);
            people.add(index, dragged);
            grid.getDataProvider().refreshAll();
        });

        addComponent(grid);
    }
}

@Legioth would it be hard to add a shorthand for single select mode to return just a single row?