src/main/java/eu/etaxonomy/cdm/vaadin/component/PagerComponent.java

   1 /**
   2 * Copyright (C) 2018 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9 package eu.etaxonomy.cdm.vaadin.component;
  10
  11 import java.util.ArrayList;
  12 import java.util.List;
  13
  14 import com.vaadin.server.FontAwesome;
  15 import com.vaadin.server.Resource;
  16 import com.vaadin.ui.Button;
  17 import com.vaadin.ui.Component;
  18 import com.vaadin.ui.GridLayout;
  19 import com.vaadin.ui.themes.ValoTheme;
  20
  21 import eu.etaxonomy.cdm.api.service.pager.Pager;
  22
  23 /**
  24  * @author a.kohlbecker
  25  * @since Jul 3, 2018
  26  *
  27  */
  28 public class PagerComponent extends GridLayout {
  29
  30     private static final long serialVersionUID = 3097302030025769906L;
  31
  32     // String viewStateTemplate;
  33
  34     private PagerClickListener pagerClickListener;
  35
  36     /**
  37      *
  38      * @param viewStateBase
  39      *            template where <code>$1%d</code> is being used as placeholder
  40      *            for the page index. E.g. <code>list/all/$1%d</code>
  41      */
  42     public PagerComponent(PagerClickListener pagerClickListener){
  43         super(1, 1);
  44         this.pagerClickListener = pagerClickListener;
  45         // this.viewStateTemplate = viewStateTemplate;
  46     }
  47
  48     public void updatePager(Pager<?> pager){
  49         List<Component> pagerComponents = new ArrayList<>();
  50
  51         if(pager.getCurrentIndex() > 0){
  52             pagerComponents.add(pagerButton(0, null, FontAwesome.ANGLE_DOUBLE_LEFT));
  53             pagerComponents.add(pagerButton(pager.getCurrentIndex() - 1, null, FontAwesome.ANGLE_LEFT));
  54         }
  55         for(Integer index : pager.getIndices()){
  56             Button button = pagerButton(index, index.toString(), null);
  57             if(index.intValue() == pager.getCurrentIndex()){
  58                 button.addStyleName(ValoTheme.BUTTON_BORDERLESS_COLORED);
  59             }
  60             pagerComponents.add(button);
  61         }
  62
  63         if(pager.getCurrentIndex() != pager.getPagesAvailable()-1){
  64             pagerComponents.add(pagerButton(pager.getCurrentIndex() + 1, null, FontAwesome.ANGLE_RIGHT));
  65             pagerComponents.add(pagerButton(pager.getPagesAvailable() - 1, null, FontAwesome.ANGLE_DOUBLE_RIGHT));
  66         }
  67         Button rangeIndicator = new Button("[ " + pager.getFirstRecord() + " - " + pager.getLastRecord() + " / " + pager.getCount() + " ]");
  68         rangeIndicator.addStyleName(ValoTheme.BUTTON_BORDERLESS);
  69         rangeIndicator.setEnabled(false); // just a label
  70         pagerComponents.add(rangeIndicator);
  71
  72         removeAllComponents();
  73         setColumns(pagerComponents.size() + 1);
  74         addComponents(pagerComponents.toArray(new Component[pagerComponents.size()]));
  75     }
  76
  77     /**
  78      * @param i
  79      * @param string
  80      * @param backward
  81      * @return
  82      */
  83     private Button pagerButton(int index, String caption, Resource icon) {
  84         Button b = new Button(caption, icon);
  85         b.addStyleName(ValoTheme.BUTTON_BORDERLESS);
  86         b.addClickListener(e -> pagerClickListener.pageIndexClicked(index));
  87         return b;
  88     }
  89
  90     public interface PagerClickListener {
  91
  92         public void pageIndexClicked(Integer index);
  93     }
  94 }