private void setDefaultText() {
String dataPlaceHolder = selectElement.getAttribute("data-placeholder");
if (dataPlaceHolder != null && dataPlaceHolder.length() > 0) {
defaultText = dataPlaceHolder;
} else if (isMultiple) {
if (options.getPlaceholderTextMultiple() != null) {
defaultText = options.getPlaceholderTextMultiple();
} else if (options.getPlaceholderText() != null) {
defaultText = options.getPlaceholderText();
} else {
defaultText = "Select Some Options";
}
} else {
if (options.getPlaceholderTextSingle() != null) {
defaultText = options.getPlaceholderTextSingle();
} else if (options.getPlaceholderText() != null) {
defaultText = options.getPlaceholderText();
} else {
defaultText = "Select an Option";
}
}
String dataNoResultsText = selectElement.getAttribute("data-no_results_text");
if (dataNoResultsText != null && dataNoResultsText.length() > 0) {
resultsNoneFound = dataNoResultsText;
} else if (options.getNoResultsText() != null) {
resultsNoneFound = options.getNoResultsText();
} else {
resultsNoneFound = "No results match";
}
}
@Override
public void onBrowserEvent(
Context context,
Element parent,
String value,
NativeEvent event,
ValueUpdater<String> valueUpdater) {
super.onBrowserEvent(context, parent, value, event, valueUpdater);
String type = event.getType();
if ("change".equals(type)) {
HasOptions key = (HasOptions) context.getKey();
SelectElement select = parent.getFirstChild().cast();
String newValue = null;
if (key.hasOptions()) {
List<String> options = key.getOptions();
int optionsPreambleSize =
key.getOptionsPreamble() == null ? 0 : key.getOptionsPreamble().size();
int selectedOptionIndex = select.getSelectedIndex() - optionsPreambleSize;
if (selectedOptionIndex >= 0) newValue = options.get(selectedOptionIndex);
} else newValue = key.getNoOptionsString();
setViewData(key, newValue);
finishEditing(parent, newValue, key, valueUpdater);
if (valueUpdater != null) {
valueUpdater.update(newValue);
}
}
}
public void addItemGroup(ItemGroup itemGroup) {
SelectElement select = getSelectElement();
OptGroupElement optGroup = createOptGroupElement(itemGroup.getItem(), itemGroup.getClassName());
for (Item item : itemGroup.getItems()) {
optGroup.appendChild(createOption(item));
}
select.appendChild(optGroup);
}
private void insertItem(String item, Direction dir, String value, String optionStyle) {
SelectElement select = getSelectElement();
OptionElement option = createOption(item, dir, value);
if (optionStyle != null) {
option.setClassName(optionStyle);
}
select.appendChild(option);
}
private String buildContainerId() {
String id = null;
String selectElementId = selectElement.getId();
if (selectElementId != null && selectElementId.length() > 0) {
id = containerIdRegExp.replace(selectElementId, "_");
} else {
id = generateContainerId();
selectElement.setId(id);
}
id += "_chzn";
return id;
}
/**
* Creates an <code><option></code> element and inserts it as a child of the specified
* <code><select></code> element. If the index is less than zero, or greater than or equal
* to the length of the list, then the option element will be appended to the end of the list.
*
* @param selectElem the <code><select></code> element
* @param item the text of the new item; cannot be <code>null</code>
* @param value the <code>value</code> attribute for the new <code><option></code>; cannot
* be <code>null</code>
* @param index the index at which to insert the child
*/
public static void insertListItem(Element selectElem, String item, String value, int index) {
assert !PotentialElement.isPotential(selectElem) : "Cannot insert into a PotentialElement";
SelectElement select = selectElem.<SelectElement>cast();
OptionElement option = Document.get().createOptionElement();
option.setText(item);
option.setValue(value);
if ((index == -1) || (index == select.getLength())) {
select.add(option, null);
} else {
OptionElement before = select.getOptions().getItem(index);
select.add(option, before);
}
}
private void setDefaultValues() {
clickTestAction =
new Function() {
@Override
public boolean f(Event e) {
return testActiveClick(e);
}
};
activateAction =
new Function() {
@Override
public boolean f(Event e) {
return activateField(e);
}
};
activeField = false;
mouseOnContainer = false;
resultsShowing = false;
NodeList<OptionElement> optionsList = selectElement.getOptions();
allowSingleDeselect =
options.isAllowSingleDeselect()
&& optionsList.getLength() > 0
&& "".equals(optionsList.getItem(0).getText());
choices = 0;
css = Resources.INSTANCE.css();
}
private void resultSelect(Event e) {
if (resultHighlight != null) {
GQuery high = resultHighlight;
String highId = high.attr("id");
resultClearHighlight();
if (isMultiple) {
resultDeactivate(high);
} else {
searchResults.find("." + css.resultSelected()).removeClass(css.resultSelected());
resultSingleSelected = high;
selectedItem.removeClass(css.chznDefault());
}
high.addClass(css.resultSelected());
int position = Integer.parseInt(highId.substring(highId.lastIndexOf("_") + 1));
OptionItem item = (OptionItem) selectItems.get(position);
item.setSelected(true);
selectElement.getOptions().getItem(item.getOptionsIndex()).setSelected(true);
if (isMultiple) {
choiceBuild(item);
} else {
selectedItem.find("span").text(item.getText());
if (allowSingleDeselect) {
singleDeselectControlBuild();
}
}
if (!e.getMetaKey() || !isMultiple) {
resultsHide();
}
searchField.val("");
if (isMultiple || currentValue == null || !currentValue.equals($selectElement.val())) {
String value = selectElement.getOptions().getItem(item.getOptionsIndex()).getValue();
fireEvent(new ChosenChangeEvent(value, this));
}
currentValue = $selectElement.val();
searchFieldScale();
}
}
private void resultsBuild() {
selectItems = new SelectParser().parse(selectElement);
if (isMultiple && choices > 0) {
searchChoices.find("li." + css.searchChoice()).remove();
choices = 0;
} else if (!isMultiple) {
selectedItem.addClass(css.chznDefault()).find("span").text(defaultText);
if (selectElement.getOptions().getLength() <= options.getDisableSearchThreshold()) {
container.addClass(css.chznContainerSingleNoSearch());
} else {
container.removeClass(css.chznContainerSingleNoSearch());
}
}
SafeHtmlBuilder content = new SafeHtmlBuilder();
for (int i = 0; i < selectItems.length(); i++) {
SelectItem item = selectItems.get(i);
if (item.isGroup()) {
SafeHtml result = resultAddGroup((GroupItem) item);
if (result != null) {
content.append(result);
}
} else {
OptionItem optionItem = (OptionItem) item;
if (optionItem.isEmpty()) {
continue;
}
SafeHtml optionHtml = resultAddOption(optionItem);
if (optionHtml != null) {
content.append(optionHtml);
}
if (optionItem.isSelected() && isMultiple) {
choiceBuild(optionItem);
} else if (optionItem.isSelected() && !isMultiple) {
selectedItem.removeClass(css.chznDefault()).find("span").text(optionItem.getText());
if (allowSingleDeselect) {
singleDeselectControlBuild();
}
}
}
}
searchFieldDisabled();
showSearchFieldDefault();
searchFieldScale();
searchResults.html(content.toSafeHtml().asString());
}
@Override
public void onBrowserEvent(
final Context context,
final Element parent,
final String value,
final NativeEvent event,
final ValueUpdater<String> valueUpdater) {
super.onBrowserEvent(context, parent, value, event, valueUpdater);
final String type = event.getType();
if ("change".equals(type)) {
final Object key = context.getKey();
final SelectElement select = parent.getFirstChild().cast();
final String newValue = options.get(select.getSelectedIndex());
setViewData(key, newValue);
finishEditing(parent, newValue, key, valueUpdater);
if (valueUpdater != null) {
valueUpdater.update(newValue);
}
}
}
private void searchFieldDisabled() {
isDisabled = selectElement.isDisabled();
if (isDisabled) {
container.addClass(css.chznDisabled());
InputElement.as(searchField.get(0)).setDisabled(true);
if (!isMultiple) {
selectedItem.unbind("focus", activateAction);
}
} else {
container.removeClass(css.chznDisabled());
InputElement.as(searchField.get(0)).setDisabled(false);
if (!isMultiple) {
selectedItem.bind("focus", activateAction);
}
}
}
private void resultsReset(Event e) {
OptionElement firstoption = selectElement.getOptions().getItem(0);
if (firstoption != null) {
firstoption.setSelected(true);
}
selectedItem.find("span").text(defaultText);
if (!isMultiple) {
selectedItem.addClass(css.chznDefault());
}
showSearchFieldDefault();
resultsResetCleanup();
fireEvent(new ChosenChangeEvent(null, this));
if (activeField) {
resultsHide();
}
}
protected void init(SelectElement element, ChosenOptions options, EventBus eventBus) {
this.selectElement = element;
this.options = options;
this.eventBus = eventBus;
this.$selectElement = $(selectElement);
setDefaultValues();
this.isMultiple = selectElement.isMultiple();
setDefaultText();
setup();
bind();
finishSetup();
}
private void resultDeselect(int index) {
OptionItem item = (OptionItem) selectItems.get(index);
item.setSelected(false);
// select option in original element
OptionElement option = selectElement.getOptions().getItem(item.getOptionsIndex());
option.setSelected(false);
$("#" + containerId + "_o_" + index)
.removeClass(css.resultSelected())
.addClass(css.activeResult())
.show();
resultClearHighlight();
winnowResults();
fireEvent(new ChosenChangeEvent(option.getValue(), false, this));
searchFieldScale();
}
/**
* This constructor may be used by subclasses to explicitly use an existing element. This element
* must be a <select> element.
*
* @param element the element to be used
*/
protected ListBox(Element element) {
super(element);
SelectElement.as(element);
}