HideablePagingNavigator.java

package fr.openwide.core.wicket.more.markup.html.navigation.paging;

import org.apache.wicket.AttributeModifier;
import org.apache.wicket.markup.html.link.AbstractLink;
import org.apache.wicket.markup.html.navigation.paging.IPageable;
import org.apache.wicket.markup.html.navigation.paging.IPagingLabelProvider;
import org.apache.wicket.markup.html.navigation.paging.PagingNavigationLink;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.ResourceModel;

public class HideablePagingNavigator extends Panel {

	private static final long serialVersionUID = 1L;

	private static final int DEFAULT_VIEW_SIZE = 11;
	
	private BootstrapPagingNavigation pagingNavigation;
	private final IPageable pageable;
	private final IPagingLabelProvider labelProvider;
	private int viewSize;
	private AbstractLink first;
	private AbstractLink last;
	
	public HideablePagingNavigator(String id, IPageable pageable) {
		this(id, pageable, null);
	}
	
	public HideablePagingNavigator(final String id, final IPageable pageable, int viewSize) {
		this(id, pageable, null, viewSize);
	}
	
	public HideablePagingNavigator(final String id, final IPageable pageable, final IPagingLabelProvider labelProvider) {
		this(id, pageable, labelProvider, -1);
	}
	
	public HideablePagingNavigator(final String id, final IPageable pageable, final IPagingLabelProvider labelProvider, int viewSize) {
		super(id);
		this.pageable = pageable;
		this.labelProvider = labelProvider;
		if (viewSize > 0) {
			this.viewSize = viewSize;
		} else {
			this.viewSize = DEFAULT_VIEW_SIZE;
		}
	}

	public final IPageable getPageable() {
		return pageable;
	}

	@Override
	protected void onInitialize() {
		super.onInitialize();
		
		// Get the navigation bar and add it to the hierarchy
		pagingNavigation = newNavigation("navigation", pageable, labelProvider);
		pagingNavigation.setViewSize(viewSize);
		add(pagingNavigation);
		
		// Add additional page links
		first = newPagingNavigationLink("first", pageable, 0);
		first.add(new AttributeModifier("title", new ResourceModel("PagingNavigator.first")));
		add(first);
		last = newPagingNavigationLink("last", pageable, -1);
		last.add(new AttributeModifier("title", new ResourceModel("PagingNavigator.last")));
		add(last);
	}
	
	@Override
	protected void onConfigure() {
		super.onConfigure();
		IPageable pageable = getPageable();
		setVisible(pageable.getPageCount() > 1);
	}
	
	@Override
	protected void onBeforeRender() {
		super.onBeforeRender();
		first.setVisible(!pagingNavigation.isBeginning());
		last.setVisible(!pagingNavigation.isEnding());
	}

	protected AbstractLink newPagingNavigationLink(String id, IPageable pageable, int pageNumber) {
		return new PagingNavigationLink<Void>(id, pageable, pageNumber);
	}

	protected BootstrapPagingNavigation newNavigation(final String id, final IPageable pageable,
		final IPagingLabelProvider labelProvider) {
		return new BootstrapPagingNavigation(id, pageable, labelProvider);
	}

}