/**
* Sencha GXT 3.1.0-beta - Sencha for GWT
* Copyright(c) 2007-2014, Sencha, Inc.
* licensing@sencha.com
*
* http://www.sencha.com/products/gxt/license/
*/
package com.sencha.gxt.widget.core.client.grid.filters;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.sencha.gxt.data.shared.ListStore;
import com.sencha.gxt.widget.core.client.event.CheckChangeEvent;
import com.sencha.gxt.widget.core.client.event.CheckChangeEvent.CheckChangeHandler;
import com.sencha.gxt.widget.core.client.menu.CheckMenuItem;
import com.sencha.gxt.widget.core.client.menu.Menu;
/**
* A menu of list items for use with a {@link ListFilter}.
*
* @param <M> the model type
* @param <V> the {@link ListStore} type
*/
public class ListMenu<M, V> extends Menu {
private ListFilter<M, V> filter;
private List<V> selected;
private ListStore<V> store;
private CheckChangeHandler<CheckMenuItem> handler = new CheckChangeHandler<CheckMenuItem>() {
@Override
public void onCheckChange(CheckChangeEvent<CheckMenuItem> event) {
ListMenu.this.onCheckChange(event);
}
};
private Map<CheckMenuItem, V> map = new HashMap<CheckMenuItem, V>();
/**
* Creates a list menu for use with the specified filter and store.
*
* @param filter the filter that uses this list menu
* @param store contains the filter items to appear in the menu
*/
public ListMenu(ListFilter<M, V> filter, ListStore<V> store) {
this.filter = filter;
this.store = store;
selected = new ArrayList<V>();
}
/**
* Returns the list filter associated with this list menu.
*
* @return the list filter for this menu
*/
public ListFilter<M, V> getFilter() {
return filter;
}
/**
* Returns the currently selected filter items from the list menu.
*
* @return the selected filter items
*/
public List<V> getSelected() {
return getValue();
}
/**
* Returns the currently selected filter items from the list menu.
*
* @return the selected filter items
*/
public List<V> getValue() {
return new ArrayList<V>(selected);
}
/**
* Sets the selected filter items for the list menu.
*
* @param selected the selected filter items
*/
public void setSelected(List<V> selected) {
this.selected = new ArrayList<V>(selected);
}
protected void onCheckChange(CheckChangeEvent<CheckMenuItem> event) {
CheckMenuItem item = event.getItem();
V m = map.get(item);
if (item.isChecked()) {
if (!selected.contains(m)) {
selected.add(m);
}
} else {
selected.remove(m);
}
filter.onCheckChange(event);
}
@Override
protected void onShow() {
super.onShow();
clear();
List<Object> values = new ArrayList<Object>();
map.clear();
for (int i = 0; i < store.size(); i++) {
V m = store.get(i);
if (!values.contains(m)) {
values.add(m);
CheckMenuItem item = new CheckMenuItem();
item.setText(m == null ? "" : m.toString());
item.setChecked(selected.contains(m));
item.setHideOnClick(false);
item.addCheckChangeHandler(handler);
add(item);
map.put(item, m);
}
}
}
}