Example usage for com.google.gwt.user.client.ui SimpleGwtSuggestBox SimpleGwtSuggestBox

Introduction

In this page you can find the example usage for com.google.gwt.user.client.ui SimpleGwtSuggestBox SimpleGwtSuggestBox.

Prototype

public SimpleGwtSuggestBox(final SuggestOracle suggestOracle) 

Source Link

Document

Creates a new SimpleGwtSuggestBox.

Usage

From source file:com.googlecode.simplegwt.combobox.client.ui.ComboBox.java

License:Apache License

/**
 * Creates a new <code>ComboBox</code>.
 * /*ww  w. j  a v a2 s  .  c o m*/
 * @param openIconImage
 * @param oracle
 */
public ComboBox(final Image openIconImage, final ComboBoxOracle<T> oracle) {
    this.oracle = oracle;
    suggestBox = new SimpleGwtSuggestBox(oracle.getSuggestOracle());

    final ShowSuggestionsCommand command = new ShowSuggestionsCommand(suggestBox);

    openIcon = new CommandIcon(openIconImage, command);

    final HorizontalPanel layout = new HorizontalPanel();
    final FocusPanel iconWrapper = new FocusPanel();
    iconWrapper.setStylePrimaryName("openIconWrapper");
    iconWrapper.add(openIcon);
    iconWrapper.addClickHandler(new ClickHandler() {
        public void onClick(ClickEvent event) {
            selectedIndex = -1;
            iconWrapper.setFocus(true);
            command.execute();
        }
    });

    KeyDownHandler keyDownHandler = new KeyDownHandler() {
        public void onKeyDown(KeyDownEvent event) {
            boolean navKey = false;

            if (!suggestBox.isSuggestionListShowing()) {
                selectedIndex = -1;
            }

            switch (event.getNativeKeyCode()) {
            case KeyCodes.KEY_UP:
                selectedIndex--;
                navKey = true;
                break;
            case KeyCodes.KEY_DOWN:
                selectedIndex++;
                navKey = true;
                break;
            case KeyCodes.KEY_ESCAPE:
                suggestBox.hideSuggestionList();
                break;
            case KeyCodes.KEY_ENTER:
            case KeyCodes.KEY_TAB:
                if (suggestBox.getSuggestionMenuSelectedItemIndex() < 0) {
                    suggestBox.hideSuggestionList();
                } else if (suggestBox.isSuggestionListShowing()) {
                    suggestBox.doSelectedItemAction();
                }
                break;
            }

            if (navKey) {
                if (selectedIndex > -1) {
                    if (!suggestBox.isSuggestionListShowing()) {
                        command.execute();
                    }

                    suggestBox.selectItem(selectedIndex);
                } else if (selectedIndex < -1) {
                    selectedIndex = -1;
                }

                event.stopPropagation();
                event.preventDefault();
            }
        }
    };

    suggestBox.addKeyDownHandler(keyDownHandler);
    iconWrapper.addKeyDownHandler(keyDownHandler);

    layout.add(suggestBox);
    layout.add(iconWrapper);

    initWidget(layout);

    setStylePrimaryName("simpleGwt-ComboBox");

    new HoverStyler().registerOn(iconWrapper);
}

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