ComboBoxWidgetViewImpl.java 文件源码

@PostConstruct
public void init() {
    // Configure valueField and customValueField controls
    valueComboBox.init(this,
                       true,
                       valueField,
                       customValueField,
                       false,
                       false,
                       CUSTOM_PROMPT,
                       ENTER_TYPE_PROMPT);
    customValueField.addKeyDownHandler((KeyDownEvent event) -> {
        int iChar = event.getNativeKeyCode();
        if (iChar == ' ') {
            event.preventDefault();
        }
    });
}