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package com.vaadin.tests.components.grid;
import java.util.ArrayList;
import java.util.List;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.data.bean.Person;
import com.vaadin.ui.Button;
import com.vaadin.ui.Grid;
import com.vaadin.ui.renderers.NumberRenderer;
public class GridFrozenColumnNPE extends SimpleGridUI {
private Grid<Person> grid;
@Override
protected void setup(VaadinRequest request) {
grid = new Grid<Person>();
grid.setSizeFull();
init();
getLayout().addComponent(grid);
grid.setFrozenColumnCount(1);
Button button = new Button("change frozen count");
button.addClickListener(event -> {
reInit();
});
getLayout().addComponent(button);
}
@Override
protected List<Person> createPersons() {
List<Person> persons = new ArrayList<>();
for (int i = 0; i < 10; ++i) {
Person person = new Person();
person.setFirstName("First " + i);
person.setLastName("Last" + i);
person.setAge(i);
persons.add(person);
}
return persons;
}
protected void init() {
grid.addColumn(Person::getFirstName);
grid.addColumn(Person::getLastName);
grid.addColumn(Person::getAge, new NumberRenderer());
grid.setItems(createPersons());
grid.setFrozenColumnCount(1);
grid.setFrozenColumnCount(2);
}
protected void reInit() {
grid.removeAllColumns();
init();
}
}
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