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/*
* Copyright 2011 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.event;
import java.io.Serializable;
import java.lang.reflect.Method;
import com.vaadin.data.Item;
import com.vaadin.data.Property;
import com.vaadin.event.MouseEvents.ClickEvent;
import com.vaadin.shared.MouseEventDetails;
import com.vaadin.ui.Component;
/**
*
* Click event fired by a {@link Component} implementing
* {@link com.vaadin.data.Container} interface. ItemClickEvents happens on an
* {@link Item} rendered somehow on terminal. Event may also contain a specific
* {@link Property} on which the click event happened.
*
* @since 5.3
*
*/
@SuppressWarnings("serial")
public class ItemClickEvent extends ClickEvent implements Serializable {
private Item item;
private Object itemId;
private Object propertyId;
public ItemClickEvent(Component source, Item item, Object itemId,
Object propertyId, MouseEventDetails details) {
super(source, details);
this.item = item;
this.itemId = itemId;
this.propertyId = propertyId;
}
/**
* Gets the item on which the click event occurred.
*
* @return item which was clicked
*/
public Item getItem() {
return item;
}
/**
* Gets a possible identifier in source for clicked Item
*
* @return
*/
public Object getItemId() {
return itemId;
}
/**
* Returns property on which click event occurred. Returns null if source
* cannot be resolved at property leve. For example if clicked a cell in
* table, the "column id" is returned.
*
* @return a property id of clicked property or null if click didn't occur
* on any distinct property.
*/
public Object getPropertyId() {
return propertyId;
}
public static final Method ITEM_CLICK_METHOD;
static {
try {
ITEM_CLICK_METHOD = ItemClickListener.class.getDeclaredMethod(
"itemClick", new Class[] { ItemClickEvent.class });
} catch (final java.lang.NoSuchMethodException e) {
// This should never happen
throw new java.lang.RuntimeException();
}
}
public interface ItemClickListener extends Serializable {
public void itemClick(ItemClickEvent event);
}
/**
* The interface for adding and removing <code>ItemClickEvent</code>
* listeners. By implementing this interface a class explicitly announces
* that it will generate an <code>ItemClickEvent</code> when one of its
* items is clicked.
* <p>
* Note: The general Java convention is not to explicitly declare that a
* class generates events, but to directly define the
* <code>addListener</code> and <code>removeListener</code> methods. That
* way the caller of these methods has no real way of finding out if the
* class really will send the events, or if it just defines the methods to
* be able to implement an interface.
* </p>
*
* @since 6.5
* @see ItemClickListener
* @see ItemClickEvent
*/
public interface ItemClickNotifier extends Serializable {
/**
* Register a listener to handle {@link ItemClickEvent}s.
*
* @param listener
* ItemClickListener to be registered
*/
public void addListener(ItemClickListener listener);
/**
* Removes an ItemClickListener.
*
* @param listener
* ItemClickListener to be removed
*/
public void removeListener(ItemClickListener listener);
}
}
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