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- /*
- * Copyright 2000-2016 Vaadin Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
-
- package com.vaadin.v7.client.ui;
-
- import java.util.ArrayList;
- import java.util.List;
-
- import com.google.gwt.event.dom.client.ChangeEvent;
- import com.google.gwt.user.client.ui.ListBox;
- import com.vaadin.client.BrowserInfo;
- import com.vaadin.client.UIDL;
- import com.vaadin.client.ui.Field;
-
- public class VNativeSelect extends VOptionGroupBase implements Field {
-
- public static final String CLASSNAME = "v-select";
-
- protected ListBox select;
-
- private boolean firstValueIsTemporaryNullItem = false;
-
- public VNativeSelect() {
- super(new ListBox(false), CLASSNAME);
- select = getOptionsContainer();
- select.setVisibleItemCount(1);
- select.addChangeHandler(this);
- select.setStyleName(CLASSNAME + "-select");
-
- updateEnabledState();
- }
-
- protected ListBox getOptionsContainer() {
- return (ListBox) optionsContainer;
- }
-
- @Override
- public void buildOptions(UIDL uidl) {
- select.clear();
- firstValueIsTemporaryNullItem = false;
-
- if (isNullSelectionAllowed() && !isNullSelectionItemAvailable()) {
- // can't unselect last item in singleselect mode
- select.addItem("", (String) null);
- }
- boolean selected = false;
- for (final Object child : uidl) {
- final UIDL optionUidl = (UIDL) child;
- select.addItem(optionUidl.getStringAttribute("caption"),
- optionUidl.getStringAttribute("key"));
- if (optionUidl.hasAttribute("selected")) {
- select.setItemSelected(select.getItemCount() - 1, true);
- selected = true;
- }
- }
- if (!selected && !isNullSelectionAllowed()) {
- // null-select not allowed, but value not selected yet; add null and
- // remove when something is selected
- select.insertItem("", (String) null, 0);
- select.setItemSelected(0, true);
- firstValueIsTemporaryNullItem = true;
- }
- }
-
- @Override
- protected String[] getSelectedItems() {
- final List<String> selectedItemKeys = new ArrayList<String>();
- for (int i = 0; i < select.getItemCount(); i++) {
- if (select.isItemSelected(i)) {
- selectedItemKeys.add(select.getValue(i));
- }
- }
- return selectedItemKeys.toArray(new String[selectedItemKeys.size()]);
- }
-
- @Override
- public void onChange(ChangeEvent event) {
-
- if (select.isMultipleSelect()) {
- client.updateVariable(paintableId, "selected", getSelectedItems(),
- isImmediate());
- } else {
- client.updateVariable(paintableId, "selected",
- new String[] { "" + getSelectedItem() }, isImmediate());
- }
- if (firstValueIsTemporaryNullItem) {
- // remove temporary empty item
- select.removeItem(0);
- firstValueIsTemporaryNullItem = false;
- /*
- * Workaround to achrome bug that may cause value change event not
- * to fire when selection is done with keyboard.
- *
- * http://dev.vaadin.com/ticket/10109
- *
- * Problem is confirmed to exist only on Chrome-Win, but just
- * execute in for all webkits. Probably exists also in other
- * webkits/blinks on windows.
- */
- if (BrowserInfo.get().isWebkit()) {
- select.getElement().blur();
- select.getElement().focus();
- }
-
- }
- }
-
- @Override
- public void setHeight(String height) {
- select.setHeight(height);
- super.setHeight(height);
- }
-
- @Override
- public void setWidth(String width) {
- select.setWidth(width);
- super.setWidth(width);
- }
-
- @Override
- public void setTabIndex(int tabIndex) {
- getOptionsContainer().setTabIndex(tabIndex);
- }
-
- @Override
- protected void updateEnabledState() {
- select.setEnabled(isEnabled() && !isReadonly());
- }
-
- @Override
- public void focus() {
- select.setFocus(true);
- }
-
- /**
- * @return the root select widget
- */
- public ListBox getSelect() {
- return getOptionsContainer();
- }
-
- }
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