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package com.vaadin.tests.components.combobox;
import java.util.ArrayList;
import java.util.Objects;
import com.vaadin.annotations.Widgetset;
import com.vaadin.data.provider.ListDataProvider;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractTestUI;
import com.vaadin.ui.Button;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.VerticalLayout;
@Widgetset("com.vaadin.DefaultWidgetSet")
public class ComboBoxPageLengthZeroRefreshItemAfterDataProviderUpdate
extends AbstractTestUI {
private static final class Bean {
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
Bean bean = (Bean) o;
return Objects.equals(name, bean.name);
}
@Override
public int hashCode() {
return Objects.hash(name);
}
private String name;
public Bean(String name) {
setName(name);
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
private ArrayList<Bean> list = new ArrayList<>();
private ArrayList<Bean> list2 = new ArrayList<>();
private int counter = 0;
@Override
protected void setup(VaadinRequest request) {
HorizontalLayout root = new HorizontalLayout();
root.setSizeFull();
VerticalLayout leftLayout = new VerticalLayout();
VerticalLayout rightLayout = new VerticalLayout();
root.addComponent(leftLayout);
root.addComponent(rightLayout);
addComponent(root);
final ComboBox<Bean> comboBoxPageLengthZero = new ComboBox<>();
comboBoxPageLengthZero.setId("combo-0");
comboBoxPageLengthZero.setPageLength(0);
final ComboBox<Bean> comboBoxRegular = new ComboBox<>();
comboBoxRegular.setId("combo-n");
comboBoxPageLengthZero.setItemCaptionGenerator(bean -> bean.getName());
comboBoxRegular.setItemCaptionGenerator(bean -> bean.getName());
ListDataProvider<Bean> dataProvider = new ListDataProvider<>(list);
ListDataProvider<Bean> dataProvider2 = new ListDataProvider<>(list2);
comboBoxPageLengthZero.setDataProvider(dataProvider);
comboBoxRegular.setDataProvider(dataProvider2);
createComponents(leftLayout, comboBoxPageLengthZero, dataProvider,
true);
createComponents(rightLayout, comboBoxRegular, dataProvider2, false);
}
private void createComponents(VerticalLayout layout,
ComboBox<Bean> comboBox, ListDataProvider<Bean> dataProvider,
boolean pageLengthZero) {
Button updateValues = new Button(
"1. Refresh backing list and dataprovider, select first item",
e -> {
Bean selected = null;
if (pageLengthZero) {
list.clear();
list.add(new Bean("foo" + (++counter)));
list.add(new Bean("foo" + (++counter)));
selected = list.get(0);
} else {
list2.clear();
list2.add(new Bean("bar" + (++counter)));
list2.add(new Bean("bar" + (++counter)));
selected = list2.get(0);
}
dataProvider.refreshAll();
comboBox.setValue(selected);
});
updateValues.setId(pageLengthZero ? "update-0" : "update-n");
Button refresh = new Button(
"2. Update item returned by combobox's getValue and call refreshItem on data provider",
e -> {
Bean currentValue = comboBox.getValue();
currentValue.setName(currentValue.getName() + "(updated)");
dataProvider.refreshItem(currentValue);
});
refresh.setId(pageLengthZero ? "refresh-0" : "refresh-n");
layout.addComponents(updateValues, refresh, comboBox);
}
}
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