Navigation List

navlist.java

package com.asbitec.vbi.framework.client.ui.widgets.list;

import com.asbitec.vbi.framework.client.activity.MenuOption;
import com.asbitec.vbi.framework.client.ui.widgets.cells.MenuOptionCell;
import com.google.gwt.core.shared.GWT;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.resources.client.ClientBundle;
import com.google.gwt.resources.client.CssResource;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.ui.IsWidget;
import com.google.gwt.user.client.ui.Widget;
import com.sencha.gxt.core.client.IdentityValueProvider;
import com.sencha.gxt.core.client.Style.SelectionMode;
import com.sencha.gxt.core.client.resources.CommonStyles;
import com.sencha.gxt.data.shared.ListStore;
import com.sencha.gxt.theme.base.client.listview.ListViewCustomAppearance;
import com.sencha.gxt.widget.core.client.ListView;
import com.sencha.gxt.widget.core.client.selection.SelectionChangedEvent.HasSelectionChangedHandlers;
import com.sencha.gxt.widget.core.client.selection.SelectionChangedEvent.SelectionChangedHandler;

public class NavigationList implements IsWidget, HasSelectionChangedHandlers<MenuOption> {
	private ListView<MenuOption, MenuOption> list;
	private MenuOptionCell cell;
	private ListStore<MenuOption> store;
	private Style style;
	
	public interface Bundle extends ClientBundle {
		
		@Source("NavigationList.css")
		Style css();
	}
	
	public interface Style extends CssResource {
	
		String listWrap();
		
		String listOver();
		
		String listSelect();
		
	}

	public NavigationList(ListStore<MenuOption> store) {
		super();
		this.store = store;
		this.buildUI();
	}
	
	protected void buildUI(){
		final Bundle bundle=GWT.create(Bundle.class);
		bundle.css().ensureInjected();
		style=bundle.css();
		
		ListViewCustomAppearance<MenuOption> appearance=new ListViewCustomAppearance<MenuOption>("." + style.listWrap(), style.listOver(), style.listSelect()) {
			
			
			@Override
			public void renderEnd(SafeHtmlBuilder builder) {
				String markup = new StringBuilder("<div class=\"").append(CommonStyles.get().clear()).append("\"></div>").toString();
		          builder.appendHtmlConstant(markup);
			}

			@Override
			public void renderItem(SafeHtmlBuilder builder, SafeHtml content) {
				builder.appendHtmlConstant("<div class='" + style.listWrap() + "'>");
		          builder.append(content);
		          builder.appendHtmlConstant("</div>");				
			}
		};
		cell=new MenuOptionCell();
		list=new ListView<>(store, new IdentityValueProvider<MenuOption>(), appearance);
		list.setCell(cell);
		list.setBorders(false);
		list.getSelectionModel().setSelectionMode(SelectionMode.SINGLE);
		list.getElement().getStyle().setBackgroundColor("#54A2F9");
		
	}

	@Override
	public Widget asWidget() {
		return list;
	}

	@Override
	public HandlerRegistration addSelectionChangedHandler(SelectionChangedHandler<MenuOption> handler) {
		return this.list.getSelectionModel().addSelectionChangedHandler(handler);
	}

	
	

}