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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.ui;
import java.util.Collection;
import com.vaadin.event.FieldEvents.BlurEvent;
import com.vaadin.event.FieldEvents.BlurListener;
import com.vaadin.event.FieldEvents.BlurNotifier;
import com.vaadin.event.FieldEvents.FocusAndBlurServerRpcDecorator;
import com.vaadin.event.FieldEvents.FocusEvent;
import com.vaadin.event.FieldEvents.FocusListener;
import com.vaadin.event.FieldEvents.FocusNotifier;
import com.vaadin.server.data.DataProvider;
import com.vaadin.shared.Registration;
import com.vaadin.shared.data.DataCommunicatorConstants;
import com.vaadin.shared.ui.nativeselect.NativeSelectState;
/**
* A simple drop-down select component. Represented on the client side by a
* "native" HTML {@code <select>} element. Lacks advanced features such as lazy
* loading, filtering, and adding new items.
*
* @author Vaadin Ltd.
*
* @param <T>
* the data item type
*
* @see com.vaadin.ui.ComboBox
*/
public class NativeSelect<T> extends AbstractSingleSelect<T>
implements FocusNotifier, BlurNotifier {
/**
* Creates a new {@code NativeSelect} with an empty caption and no items.
*/
public NativeSelect() {
registerRpc(new FocusAndBlurServerRpcDecorator(this, this::fireEvent));
addDataGenerator((item, json) -> json
.put(DataCommunicatorConstants.DATA, String.valueOf(item)));
}
/**
* Creates a new {@code NativeSelect} with the given caption and no items.
*
* @param caption
* the component caption to set, null for no caption
*/
public NativeSelect(String caption) {
this();
setCaption(caption);
}
/**
* Creates a new {@code NativeSelect} with the given caption, containing the
* data items in the given collection.
*
* @param caption
* the component caption to set, null for no caption
* @param items
* the data items to use, not null
*/
public NativeSelect(String caption, Collection<T> items) {
this(caption);
setItems(items);
}
/**
* Creates a new {@code NativeSelect} with the given caption, using the
* given {@code DataProvider} as the source of data items.
*
* @param caption
* the component caption to set, null for no caption
* @param dataProvider
* the source of data items to use, not null
*/
public NativeSelect(String caption, DataProvider<T, ?> dataProvider) {
this(caption);
setDataProvider(dataProvider);
}
@Override
public Registration addFocusListener(FocusListener listener) {
addListener(FocusEvent.EVENT_ID, FocusEvent.class, listener,
FocusListener.focusMethod);
return () -> removeListener(FocusEvent.EVENT_ID, FocusEvent.class,
listener);
}
@Override
@Deprecated
public void removeFocusListener(FocusListener listener) {
removeListener(FocusEvent.EVENT_ID, FocusEvent.class, listener);
}
@Override
public Registration addBlurListener(BlurListener listener) {
addListener(BlurEvent.EVENT_ID, BlurEvent.class, listener,
BlurListener.blurMethod);
return () -> removeListener(BlurEvent.EVENT_ID, BlurEvent.class,
listener);
}
@Override
@Deprecated
public void removeBlurListener(BlurListener listener) {
removeListener(BlurEvent.EVENT_ID, BlurEvent.class, listener);
}
@Override
protected NativeSelectState getState() {
return getState(true);
}
@Override
protected NativeSelectState getState(boolean markAsDirty) {
return (NativeSelectState) super.getState(markAsDirty);
}
}
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