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php 重写分页器 CLinkPager的实例

发布于：2022-04-24 09:33:16  栏目：技术文档

这篇文章主要介绍了php 重写分页器 CLinkPager的实例的相关资料,希望通过本文能帮助到大家，让大家实现这样的功能，需要的朋友可以参考下

php 重写分页器 CLinkPager的实例

1、自定义的分页器类放在哪里？

有两个位置可以放，第一种是放在 protected/extensions 中，在使用是import进来，或在config文件中import进来；第二种是放在 protected/components 中，作为组件存在，不需要import

2、用派生方式是最好的

  1. class MyPager extends CLinkPager

入口函数是：public function run() ，当显示分页器时run()被调用，里面的输出就会显示在相应位置；其他的完全自定义，如果你不知道上一页、下一页、首页、尾页、总页数、当前页码等信息，可以参考CLinkPager的源码，yii/frameworks/web/widgets/pagers/CLinkPager.php

  1. <?php
  3. class MyPager extends CLinkPager
  4. {
  5.   const CSS_FIRST_PAGE='first';
  6.   const CSS_LAST_PAGE='last';
  7.   const CSS_PREVIOUS_PAGE='previous';
  8.   const CSS_NEXT_PAGE='next';
  9.   const CSS_INTERNAL_PAGE='page';
  10.   const CSS_HIDDEN_PAGE='hidden';
  11.   const CSS_SELECTED_PAGE='selected';
  13.   /**
  14.    * @var string the CSS class for the first page button. Defaults to 'first'.
  15.    * @since 1.1.11
  16.    */
  17.   public $firstPageCssClass=self::CSS_FIRST_PAGE;
  18.   /**
  19.    * @var string the CSS class for the last page button. Defaults to 'last'.
  20.    * @since 1.1.11
  21.    */
  22.   public $lastPageCssClass=self::CSS_LAST_PAGE;
  23.   /**
  24.    * @var string the CSS class for the previous page button. Defaults to 'previous'.
  25.    * @since 1.1.11
  26.    */
  27.   public $previousPageCssClass=self::CSS_PREVIOUS_PAGE;
  28.   /**
  29.    * @var string the CSS class for the next page button. Defaults to 'next'.
  30.    * @since 1.1.11
  31.    */
  32.   public $nextPageCssClass=self::CSS_NEXT_PAGE;
  33.   /**
  34.    * @var string the CSS class for the internal page buttons. Defaults to 'page'.
  35.    * @since 1.1.11
  36.    */
  37.   public $internalPageCssClass=self::CSS_INTERNAL_PAGE;
  38.   /**
  39.    * @var string the CSS class for the hidden page buttons. Defaults to 'hidden'.
  40.    * @since 1.1.11
  41.    */
  42.   public $hiddenPageCssClass=self::CSS_HIDDEN_PAGE;
  43.   /**
  44.    * @var string the CSS class for the selected page buttons. Defaults to 'selected'.
  45.    * @since 1.1.11
  46.    */
  47.   public $selectedPageCssClass=self::CSS_SELECTED_PAGE;
  48.   /**
  49.    * @var integer maximum number of page buttons that can be displayed. Defaults to 10.
  50.    */
  51.   public $maxButtonCount=10;
  52.   /**
  53.    * @var string the text label for the next page button. Defaults to 'Next >'.
  54.    */
  55.   public $nextPageLabel;
  56.   /**
  57.    * @var string the text label for the previous page button. Defaults to '< Previous'.
  58.    */
  59.   public $prevPageLabel;
  60.   /**
  61.    * @var string the text label for the first page button. Defaults to '<< First'.
  62.    */
  63.   public $firstPageLabel;
  64.   /**
  65.    * @var string the text label for the last page button. Defaults to 'Last >>'.
  66.    */
  67.   public $lastPageLabel;
  68.   /**
  69.    * @var string the text shown before page buttons. Defaults to 'Go to page: '.
  70.    */
  71.   public $header;
  72.   /**
  73.    * @var string the text shown after page buttons.
  74.    */
  75.   public $footer='';
  76.   /**
  77.    * @var mixed the CSS file used for the widget. Defaults to null, meaning
  78.    * using the default CSS file included together with the widget.
  79.    * If false, no CSS file will be used. Otherwise, the specified CSS file
  80.    * will be included when using this widget.
  81.    */
  82.   public $cssFile;
  83.   /**
  84.    * @var array HTML attributes for the pager container tag.
  85.    */
  86.   public $htmlOptions=array();
  88.   /**
  89.    * Initializes the pager by setting some default property values.
  90.    */
  91.   public function init()
  92.   {
  93.     if($this->nextPageLabel===null)
  94.       $this->nextPageLabel=Yii::t('yii','Next >');
  95.     if($this->prevPageLabel===null)
  96.       $this->prevPageLabel=Yii::t('yii','< Previous');
  97.     //if($this->firstPageLabel===null)
  98.     // $this->firstPageLabel=Yii::t('yii','<< First');
  99.     //if($this->lastPageLabel===null)
  100.     // $this->lastPageLabel=Yii::t('yii','Last >>');
  101.     if($this->header===null)
  102.       $this->header=Yii::t('yii','Go to page: ');
  104.     if(!isset($this->htmlOptions['id']))
  105.       $this->htmlOptions['id']=$this->getId();
  106.     if(!isset($this->htmlOptions['class']))
  107.       $this->htmlOptions['class']='yiiPager';
  108.   }
  110.   /**
  111.    * Executes the widget.
  112.    * This overrides the parent implementation by displaying the generated page buttons.
  113.    */
  114.   public function run()
  115.   {
  116.     $this->registerClientScript();
  117.     $buttons=$this->createPageButtons();
  118.     if(empty($buttons))
  119.       return;
  120.     echo $this->header;
  121. //   echo CHtml::tag('ul',$this->htmlOptions,implode("\n",$buttons));
  122.     echo implode("\n",$buttons);
  123.     echo $this->footer;
  124.   }
  126.   /**
  127.    * Creates the page buttons.
  128.    * @return array a list of page buttons (in HTML code).
  129.    */
  130.   protected function createPageButtons()
  131.   {
  132.     if(($pageCount=$this->getPageCount())<=1)
  133.       return array();
  135.     list($beginPage,$endPage,$ellipsis)=$this->getPageRange();
  137.     $currentPage=$this->getCurrentPage(false); // currentPage is calculated in getPageRange()
  138.     $buttons=array();
  140.     // first page
  141.     //$buttons[]=$this->createPageButton($this->firstPageLabel,0,$this->firstPageCssClass,$currentPage<=0,false);
  143.     // prev page
  144.     if(($page=$currentPage-1)<0)
  145.       $page=0;
  146.     if($currentPage == 0){
  147.       $buttons[] = "<span style='background:#a3a3a3'><上一頁</span>";
  148.     }else{
  149.       $buttons[]=$this->createPageButton($this->prevPageLabel,$page,$this->previousPageCssClass,$currentPage<=0,false);
  150.     }
  151.     // internal pages start
  152.     // first
  153.     $buttons[]=$this->createPageButton(1,0,$this->internalPageCssClass,false,$i==$currentPage);
  154.     //middle
  155.     if($ellipsis == 'both'){
  156.       $buttons[] = "<span style='background:#a3a3a3'>...</span>";
  157.     }
  158.     for($i=$beginPage;$i<=$endPage;++$i){
  159.       if($ellipsis == 'left' && $i == $beginPage){
  160.         $buttons[] = "<span style='background:#a3a3a3'>...</span>";
  161.       }
  162.       $buttons[]=$this->createPageButton($i+1,$i,$this->internalPageCssClass,false,$i==$currentPage);
  163.       if($ellipsis == 'right' && $i == $endPage){
  164.         $buttons[] = "<span style='background:#a3a3a3'>...</span>";
  165.       }
  166.     }  
  167.     if($ellipsis == 'both'){
  168.       $buttons[] = "<span style='background:#a3a3a3'>...</span>";
  169.     }
  170.     // last
  171.     $buttons[]=$this->createPageButton($pageCount,$pageCount - 1,$this->internalPageCssClass,false,$i==$currentPage);
  172.     // internal pages end
  173.     // next page
  174.     if(($page=$currentPage+1)>=$pageCount-1)
  175.       $page=$pageCount-1;
  176.     if($currentPage == ($pageCount-1)){
  177.       $buttons[] = "<span style='background:#a3a3a3'>下一頁></span>";
  178.     }else{
  179.       $buttons[]=$this->createPageButton($this->nextPageLabel,$page,$this->nextPageCssClass,$currentPage>=$pageCount-1,false);
  180.     }
  181.     // last page
  182.     //$buttons[]=$this->createPageButton($this->lastPageLabel,$pageCount-1,$this->lastPageCssClass,$currentPage>=$pageCount-1,false);
  184.     return $buttons;
  185.   }
  187.   /**
  188.    * Creates a page button.
  189.    * You may override this method to customize the page buttons.
  190.    * @param string $label the text label for the button
  191.    * @param integer $page the page number
  192.    * @param string $class the CSS class for the page button.
  193.    * @param boolean $hidden whether this page button is visible
  194.    * @param boolean $selected whether this page button is selected
  195.    * @return string the generated button
  196.    */
  197.   protected function createPageButton($label,$page,$class,$hidden,$selected)
  198.   {
  199.     if($hidden || $selected)
  200.       $class.=' '.($hidden ? $this->hiddenPageCssClass : $this->selectedPageCssClass);
  201.     if ($selected) {
  202.       $result = "<span>" . ++$page . "</span>";
  203.     } else {
  204.       $result = CHtml::link($label,$this->createPageUrl($page));
  205.     }
  206.     return $result;
  207.   }
  209.   /**
  210.    * @return array the begin and end pages that need to be displayed.
  211.    */
  212.   protected function getPageRange()
  213.   {
  214.     $currentPage=$this->getCurrentPage();
  215.     $pageCount=$this->getPageCount();
  216.     /*$beginPage=max(0, $currentPage-(int)($this->maxButtonCount/2));
  217.     if(($endPage=$beginPage+$this->maxButtonCount-1)>=$pageCount)
  218.     {
  219.       $endPage=$pageCount-1;
  220.       $beginPage=max(0,$endPage-$this->maxButtonCount+1);
  221.     }*/
  222.     if($pageCount > $this->maxButtonCount){
  223.       if($currentPage > 4 && $currentPage < ($pageCount - 4)){
  224.         // print_r('a');
  225.         $beginPage = $currentPage - 2;
  226.         $endPage = $currentPage + 2;
  227.         $ellipsis = 'both';
  228.       }else{
  229.         $beginPage=max(1, $currentPage-(int)($this->maxButtonCount/2));
  230.         if($beginPage == 1){
  231.           $ellipsis = 'right';
  232.         }else{
  233.           $ellipsis = 'left';
  234.         }
  235.         if(($endPage=$beginPage+$this->maxButtonCount-1)>=$pageCount)
  236.         {
  237.           // print_r('b');
  238.           $endPage=$pageCount-2;
  239.           $beginPage=max(1,$endPage-$this->maxButtonCount+1);
  240.         }elseif(($endPage=$beginPage+$this->maxButtonCount-1)>=$pageCount-2){
  241.           // print_r('c');
  242.           $endPage=$pageCount-2;
  243.         }
  245.       }
  246.     }else{
  247.       $beginPage=max(1, $currentPage-(int)($this->maxButtonCount/2));
  248.       if(($endPage=$beginPage+$this->maxButtonCount-1)>=$pageCount)
  249.       {
  250.         $endPage=$pageCount-2;
  251.         $beginPage=max(1,$endPage-$this->maxButtonCount+1);
  252.       }
  253.     }
  255.     return array($beginPage,$endPage, $ellipsis);
  256.   }
  258.   /**
  259.    * Registers the needed client scripts (mainly CSS file).
  260.    */
  261.   public function registerClientScript()
  262.   {
  263.     if($this->cssFile!==false)
  264.       self::registerCssFile($this->cssFile);
  265.   }
  267.   /**
  268.    * Registers the needed CSS file.
  269.    * @param string $url the CSS URL. If null, a default CSS URL will be used.
  270.    */
  271.   public static function registerCssFile($url=null)
  272.   {
  273.     if($url===null)
  274.       $url=CHtml::asset(Yii::getPathOfAlias('system.web.widgets.pagers.pager').'.css');
  275.     Yii::app()->getClientScript()->registerCssFile($url);
  276.   }
  277. }

调用方式在View里的相应widget，定义pager的class为自定义的分页器类名即可，参考：

  1. $this->widget('zii.widgets.CListView', array(
  2.   'dataProvider'=>$dataProvider,
  3.   'itemView'=>'_view_t',
  4.   'pager'=>array(
  5.   'class'=>'MyPager',
  6.  )
  7. ));
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