/*
* Copyright (c) 2011 Zhihua (Dennis) Jiang
*
* 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.gwtmobile.ui.client.widgets;
import com.google.gwt.event.dom.client.BlurEvent;
import com.google.gwt.event.dom.client.BlurHandler;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.FocusEvent;
import com.google.gwt.event.dom.client.FocusHandler;
import com.google.gwt.event.logical.shared.HasValueChangeHandlers;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.Widget;
import com.gwtmobile.ui.client.utils.Utils;
public class DropDownList extends PanelBase
implements FocusHandler, BlurHandler, ChangeHandler, HasValueChangeHandlers<String> {
ListBox _listBox = new ListBox();
public DropDownList() {
super();
super.add(_listBox);
if (!Utils.isIOS()) {
super.add(new HTMLPanel(""));
super.add(new HTMLPanel(""));
super.add(new HTMLPanel(""));
}
setStyleName("gwtm-DropDownList");
_listBox.addFocusHandler(this);
_listBox.addBlurHandler(this);
_listBox.addChangeHandler(this);
}
@Override
protected void onUnload() {
removeStyleName("Focus");
super.onUnload();
}
@Override
public void onFocus(FocusEvent event) {
addStyleName("Focus");
}
@Override
public void onBlur(BlurEvent event) {
removeStyleName("Focus");
}
@Override
public void onChange(ChangeEvent event) {
int index = _listBox.getSelectedIndex();
String value = _listBox.getValue(index);
ValueChangeEvent.fire(this, value);
}
@Override
public void add(Widget w) {
assert w instanceof DropDownItem : "Can only contain DropDownItem in DropDownList.";
DropDownItem item = (DropDownItem) w;
_listBox.addItem(item.getText(), item.getValue());
}
public String getSelectedText() {
int index = _listBox.getSelectedIndex();
if (index >= 0) {
return _listBox.getItemText(index);
}
else {
return null;
}
}
public String getSelectedValue() {
int index = _listBox.getSelectedIndex();
if (index >= 0) {
return _listBox.getValue(index);
}
else {
return null;
}
}
public ListBox getListBox() {
return _listBox;
}
@Override
public HandlerRegistration addValueChangeHandler(
ValueChangeHandler<String> handler) {
return this.addHandler(handler, ValueChangeEvent.getType());
}
}