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package com.vaadin.tests.components.combobox;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import com.vaadin.server.VaadinRequest;
import com.vaadin.shared.ui.ContentMode;
import com.vaadin.shared.ui.combobox.ComboBoxClientRpc;
import com.vaadin.ui.Button;
import com.vaadin.ui.CheckBox;
import com.vaadin.ui.ComboBox;
import com.vaadin.ui.Label;
import com.vaadin.ui.Notification;
public class ComboBoxSelectingNewItemValueChange extends ComboBoxSelecting {
final class CustomComboBox extends ComboBox<String> {
private CustomComboBox(String caption, Collection<String> options) {
super(caption, options);
}
public ComboBoxClientRpc getComboBoxClientRpc() {
return getRpcProxy(ComboBoxClientRpc.class);
}
}
CustomComboBox comboBox;
List<String> items = new ArrayList<>();
int valueChangeEventCount = 0;
int selectionChangeEventCount = 0;
Label valueLabel = new Label();
Label valueChangeLabel = new Label(null, ContentMode.HTML);
CheckBox delay = new CheckBox("Slow adding process", false);
CheckBox reject = new CheckBox("Reject new values", false);
CheckBox noSelection = new CheckBox("Don't select new values", false);
@Override
protected void setup(VaadinRequest request) {
initItems();
comboBox = new CustomComboBox(null, items);
comboBox.setTextInputAllowed(true);
comboBox.setEmptySelectionAllowed(true);
comboBox.addValueChangeListener(event -> {
String value = event.getValue();
if (value != null) {
valueLabel.setValue(value);
} else {
valueLabel.setValue("null");
}
});
configureNewItemHandling();
comboBox.addValueChangeListener(e -> {
++valueChangeEventCount;
updateLabel(e.isUserOriginated());
});
comboBox.addSelectionListener(e -> {
++selectionChangeEventCount;
updateLabel(e.isUserOriginated());
});
Button checkButton = new Button("Check ComboBox value", e -> {
Notification.show("selected: " + comboBox.getValue());
});
Button resetButton = new Button("Reset options", e -> {
comboBox.setValue(null);
initItems();
comboBox.getDataProvider().refreshAll();
valueLabel.setValue("");
valueChangeLabel.setValue("Reset");
valueChangeEventCount = 0;
selectionChangeEventCount = 0;
});
valueLabel.setId("value");
valueChangeLabel.setId("change");
delay.setId("delay");
reject.setId("reject");
noSelection.setId("noSelection");
resetButton.setId("reset");
addComponents(comboBox, valueLabel, valueChangeLabel, checkButton,
resetButton, delay, reject, noSelection);
}
@SuppressWarnings("deprecation")
protected void configureNewItemHandling() {
comboBox.setNewItemHandler(text -> {
if (Boolean.TRUE.equals(delay.getValue())) {
try {
Thread.sleep(2000);
} catch (InterruptedException e1) {
e1.printStackTrace();
}
}
if (Boolean.TRUE.equals(reject.getValue())) {
valueChangeLabel.setValue("item " + text + " discarded");
comboBox.getComboBoxClientRpc().newItemNotAdded(text);
} else {
items.add(text);
Collections.sort(items);
valueChangeLabel
.setValue("adding new item... count: " + items.size());
if (Boolean.TRUE.equals(noSelection.getValue())) {
comboBox.getComboBoxClientRpc().newItemNotAdded(text);
}
comboBox.getDataProvider().refreshAll();
}
});
}
private void initItems() {
items.clear();
for (char c = 'a'; c <= 'z'; c++) {
for (int i = 0; i < 100; i++) {
items.add("" + c + i);
}
}
}
private void updateLabel(boolean userOriginated) {
valueChangeLabel.setValue("Value change count: " + valueChangeEventCount
+ "\nSelection change count: " + selectionChangeEventCount
+ "\nuser originated: " + userOriginated);
}
@Override
protected String getTestDescription() {
return "New item should trigger value change when accepted "
+ "and restore the field to previous value when rejected.";
}
@Override
protected Integer getTicketNumber() {
return 10284;
}
}
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