sk.lazyman.gizmo.component.data.CountToolbar.java Source code

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Here is the source code for sk.lazyman.gizmo.component.data.CountToolbar.java

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/*
 * Copyright 2015 Viliam Repan (lazyman)
 *
 * 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 sk.lazyman.gizmo.component.data;

import org.apache.wicket.AttributeModifier;
import org.apache.wicket.extensions.markup.html.repeater.data.table.AbstractToolbar;
import org.apache.wicket.extensions.markup.html.repeater.data.table.DataTable;
import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.navigation.paging.IPageable;
import org.apache.wicket.markup.repeater.data.DataViewBase;
import org.apache.wicket.model.AbstractReadOnlyModel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.StringResourceModel;
import sk.lazyman.gizmo.util.LoadableModel;

/**
 * @author lazyman
 */
public class CountToolbar extends AbstractToolbar {

    private static final String ID_TD = "td";
    private static final String ID_COUNT = "count";

    public CountToolbar(DataTable<?, ?> table) {
        super(table);
    }

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

        WebMarkupContainer td = new WebMarkupContainer(ID_TD);
        td.add(AttributeModifier.replace("colspan", new AbstractReadOnlyModel<String>() {

            @Override
            public String getObject() {
                return String.valueOf(getTable().getColumns().size());
            }
        }));
        add(td);

        Label count = new Label(ID_COUNT, createModel());
        count.setRenderBodyOnly(true);
        td.add(count);
    }

    private IModel<String> createModel() {
        return new LoadableModel<String>() {

            @Override
            protected String load() {
                long from = 0;
                long to = 0;
                long count = 0;

                IPageable pageable = getTable();
                if (pageable instanceof DataViewBase) {
                    DataViewBase view = (DataViewBase) pageable;

                    from = view.getFirstItemOffset() + 1;
                    to = from + view.getItemsPerPage() - 1;
                    long itemCount = view.getItemCount();
                    if (to > itemCount) {
                        to = itemCount;
                    }
                    count = itemCount;
                } else if (pageable instanceof DataTable) {
                    DataTable table = (DataTable) pageable;

                    from = table.getCurrentPage() * table.getItemsPerPage() + 1;
                    to = from + table.getItemsPerPage() - 1;
                    long itemCount = table.getItemCount();
                    if (to > itemCount) {
                        to = itemCount;
                    }
                    count = itemCount;
                }

                if (count > 0) {
                    return new StringResourceModel("CountToolbar.label", CountToolbar.this, null,
                            new Object[] { from, to, count }).getString();
                }

                return new StringResourceModel("CountToolbar.noFound", CountToolbar.this, null).getString();
            }
        };
    }
}