CrudifierTable.java

/**
 * Copyright (C) 2014 Premium Minds.
 *
 * This file is part of wicket-crudifier.
 *
 * wicket-crudifier is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any
 * later version.
 *
 * wicket-crudifier is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with wicket-crudifier. If not, see <http://www.gnu.org/licenses/>.
 */
package com.premiumminds.wicket.crudifier.table;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.wicket.AttributeModifier;
import org.apache.wicket.ajax.AjaxEventBehavior;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.markup.head.CssHeaderItem;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.list.ListItem;
import org.apache.wicket.markup.html.list.ListView;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.markup.repeater.RepeatingView;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.LoadableDetachableModel;
import org.apache.wicket.model.StringResourceModel;
import org.apache.wicket.request.resource.CssResourceReference;
import org.apache.wicket.request.resource.ResourceReference;

import com.premiumminds.wicket.crudifier.IObjectRenderer;

public abstract class CrudifierTable<T> extends Panel {
	private static final long serialVersionUID = -6553624504699750680L;
	private static final ResourceReference CSS = new CssResourceReference(CrudifierTable.class, "CrudifierTable.css");

	private List<IColumn<T>> columns = new ArrayList<IColumn<T>>();
	private RepeatingView headers = new RepeatingView("headers");

	private boolean clickable = false;

	private ListView<T> listView;
	private WebMarkupContainer table;

	private Map<Class<?>, IObjectRenderer<?>> renderers;

	public CrudifierTable(String id, Map<Class<?>, IObjectRenderer<?>> renderers) {
		super(id);

		this.renderers = renderers;

		add(table = new WebMarkupContainer("table"));

		table.add(headers);

		IModel<List<T>> modelList = new LoadableDetachableModel<List<T>>() {
			private static final long serialVersionUID = 3296835301481871094L;

			@Override
			protected List<T> load() {
				return CrudifierTable.this.load(0, 0);
			}
		};

		table.add(listView = new ListView<T>("list", modelList) {
			private static final long serialVersionUID = -2293426877086666745L;

			@Override
			protected void populateItem(final ListItem<T> item) {
				RepeatingView columns = new RepeatingView("columns");
				for(final IColumn<T> column : CrudifierTable.this.columns){
					columns.add(column.createComponent(columns.newChildId(), item.getModelObject(), CrudifierTable.this, CrudifierTable.this.renderers));
				}

				item.add(columns);
				CrudifierTable.this.populateItem(item);
				return;
			}
		}.setReuseItems(true));
	}

	public CrudifierTable(String id){
		this(id, new HashMap<Class<?>, IObjectRenderer<?>>());
	}

	@Override
	protected void onConfigure() {
		super.onConfigure();

		headers.removeAll();
		for(IColumn<T> column : columns){
			StringResourceModel stringResourceModel = new StringResourceModel(column.getPropertyName()+".label", this, null);
			stringResourceModel.setDefaultValue(column.getPropertyName());
			headers.add(new Label(headers.newChildId(), stringResourceModel));
		}
	}

	@Override
	public void renderHead(IHeaderResponse response) {
		super.renderHead(response);
		response.render(CssHeaderItem.forReference(CSS));
	}

	public void addColumn(IColumn<T> column){
		columns.add(column);
	}

	public boolean isClickable() {
		return clickable;
	}

	public void setClickable(boolean clickable) {
		this.clickable = clickable;
	}

	protected void populateItem(final ListItem<T> item) {
		if(isClickable()){
			item.add(new AjaxEventBehavior("click") {
				private static final long serialVersionUID = -4889154387600763576L;
				@Override
				protected void onEvent(AjaxRequestTarget target) {
					onSelected(target, item.getModel());
				}
			});
			item.add(AttributeModifier.append("class", "hover"));
		}
		return;
	}

	protected abstract List<T> load(int page, int maxPerPage);

	protected void onSelected(AjaxRequestTarget target, IModel<T> model){ }

	public void refresh(){
		listView.removeAll();
	}

	public Map<Class<?>, IObjectRenderer<?>> getRenderers() {
		return renderers;
	}

	public WebMarkupContainer getTableComponent(){
		return table;
	}
	
	public CrudifierTable<T> setReuseItems(boolean reuseItems){
		listView.setReuseItems(reuseItems);
		return this;
	}
	
	public boolean getReuseItems(){
		return listView.getReuseItems();
	}
}