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- /*
- * Copyright 2000-2014 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.client.ui;
-
- import java.util.ArrayList;
- import java.util.Iterator;
-
- import com.google.gwt.event.dom.client.ChangeEvent;
- import com.google.gwt.user.client.ui.ListBox;
- import com.vaadin.client.UIDL;
-
- public class VListSelect extends VOptionGroupBase {
-
- public static final String CLASSNAME = "v-select";
-
- private static final int VISIBLE_COUNT = 10;
-
- protected ListBox select;
-
- private int lastSelectedIndex = -1;
-
- public VListSelect() {
- super(new ListBox(true), CLASSNAME);
- select = getOptionsContainer();
- select.addChangeHandler(this);
- select.addClickHandler(this);
- select.setVisibleItemCount(VISIBLE_COUNT);
- setStyleName(CLASSNAME);
-
- updateEnabledState();
- }
-
- @Override
- public void setStyleName(String style) {
- super.setStyleName(style);
- updateStyleNames();
- }
-
- @Override
- public void setStylePrimaryName(String style) {
- super.setStylePrimaryName(style);
- updateStyleNames();
- }
-
- protected void updateStyleNames() {
- container.setStyleName(getStylePrimaryName());
- select.setStyleName(getStylePrimaryName() + "-select");
- }
-
- protected ListBox getOptionsContainer() {
- return (ListBox) optionsContainer;
- }
-
- @Override
- public void buildOptions(UIDL uidl) {
- int scrollTop = select.getElement().getScrollTop();
- int rowCount = getRows();
- select.setMultipleSelect(isMultiselect());
- select.clear();
- if (!isMultiselect() && isNullSelectionAllowed()
- && !isNullSelectionItemAvailable()) {
- // can't unselect last item in singleselect mode
- select.addItem("", (String) null);
- }
- for (final Iterator<?> i = uidl.getChildIterator(); i.hasNext();) {
- final UIDL optionUidl = (UIDL) i.next();
- select.addItem(optionUidl.getStringAttribute("caption"),
- optionUidl.getStringAttribute("key"));
- if (optionUidl.hasAttribute("selected")) {
- int itemIndex = select.getItemCount() - 1;
- select.setItemSelected(itemIndex, true);
- lastSelectedIndex = itemIndex;
- }
- }
- if (getRows() > 0) {
- select.setVisibleItemCount(getRows());
- }
- // FIXME: temporary hack for preserving the scroll state when the
- // contents haven't been changed obviously. This should be dealt with in
- // the rewrite.
- if (rowCount == getRows()) {
- select.getElement().setScrollTop(scrollTop);
- }
- }
-
- @Override
- protected String[] getSelectedItems() {
- final ArrayList<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) {
- final int si = select.getSelectedIndex();
- if (si == -1 && !isNullSelectionAllowed()) {
- select.setSelectedIndex(lastSelectedIndex);
- } else {
- lastSelectedIndex = si;
- if (isMultiselect()) {
- client.updateVariable(paintableId, "selected",
- getSelectedItems(), isImmediate());
- } else {
- client.updateVariable(paintableId, "selected",
- new String[] { "" + getSelectedItem() }, isImmediate());
- }
- }
- }
-
- @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);
- }
- }
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