php 重写分页器 CLinkPager的实例

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

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

<?php

class mypager extends clinkpager
{
  const css_first_page='first';
  const css_last_page='last';
  const css_previous_page='previous';
  const css_next_page='next';
  const css_internal_page='page';
  const css_hidden_page='hidden';
  const css_selected_page='selected';

  /**
   * @var string the css class for the first page button. defaults to 'first'.
   * @since 1.1.11
   */
  public $firstpagecssclass=self::css_first_page;
  /**
   * @var string the css class for the last page button. defaults to 'last'.
   * @since 1.1.11
   */
  public $lastpagecssclass=self::css_last_page;
  /**
   * @var string the css class for the previous page button. defaults to 'previous'.
   * @since 1.1.11
   */
  public $previouspagecssclass=self::css_previous_page;
  /**
   * @var string the css class for the next page button. defaults to 'next'.
   * @since 1.1.11
   */
  public $nextpagecssclass=self::css_next_page;
  /**
   * @var string the css class for the internal page buttons. defaults to 'page'.
   * @since 1.1.11
   */
  public $internalpagecssclass=self::css_internal_page;
  /**
   * @var string the css class for the hidden page buttons. defaults to 'hidden'.
   * @since 1.1.11
   */
  public $hiddenpagecssclass=self::css_hidden_page;
  /**
   * @var string the css class for the selected page buttons. defaults to 'selected'.
   * @since 1.1.11
   */
  public $selectedpagecssclass=self::css_selected_page;
  /**
   * @var integer maximum number of page buttons that can be displayed. defaults to 10.
   */
  public $maxbuttoncount=10;
  /**
   * @var string the text label for the next page button. defaults to 'next >'.
   */
  public $nextpagelabel;
  /**
   * @var string the text label for the previous page button. defaults to '< previous'.
   */
  public $prevpagelabel;
  /**
   * @var string the text label for the first page button. defaults to '<< first'.
   */
  public $firstpagelabel;
  /**
   * @var string the text label for the last page button. defaults to 'last >>'.
   */
  public $lastpagelabel;
  /**
   * @var string the text shown before page buttons. defaults to 'go to page: '.
   */
  public $header;
  /**
   * @var string the text shown after page buttons.
   */
  public $footer='';
  /**
   * @var mixed the css file used for the widget. defaults to null, meaning
   * using the default css file included together with the widget.
   * if false, no css file will be used. otherwise, the specified css file
   * will be included when using this widget.
   */
  public $cssfile;
  /**
   * @var array html attributes for the pager container tag.
   */
  public $htmloptions=array();

  /**
   * initializes the pager by setting some default property values.
   */
  public function init()
  {
    if($this->nextpagelabel===null)
      $this->nextpagelabel=yii::t('yii','next >');
    if($this->prevpagelabel===null)
      $this->prevpagelabel=yii::t('yii','< previous');
    //if($this->firstpagelabel===null)
    // $this->firstpagelabel=yii::t('yii','<< first');
    //if($this->lastpagelabel===null)
    // $this->lastpagelabel=yii::t('yii','last >>');
    if($this->header===null)
      $this->header=yii::t('yii','go to page: ');

    if(!isset($this->htmloptions['id']))
      $this->htmloptions['id']=$this->getid();
    if(!isset($this->htmloptions['class']))
      $this->htmloptions['class']='yiipager';
  }

  /**
   * executes the widget.
   * this overrides the parent implementation by displaying the generated page buttons.
   */
  public function run()
  {
    $this->registerclientscript();
    $buttons=$this->createpagebuttons();
    if(empty($buttons))
      return;
    echo $this->header;
//   echo chtml::tag('ul',$this->htmloptions,implode("\n",$buttons));
    echo implode("\n",$buttons);
    echo $this->footer;
  }

  /**
   * creates the page buttons.
   * @return array a list of page buttons (in html code).
   */
  protected function createpagebuttons()
  {
    if(($pagecount=$this->getpagecount())<=1)
      return array();

    list($beginpage,$endpage,$ellipsis)=$this->getpagerange();

    $currentpage=$this->getcurrentpage(false); // currentpage is calculated in getpagerange()
    $buttons=array();

    // first page
    //$buttons[]=$this->createpagebutton($this->firstpagelabel,0,$this->firstpagecssclass,$currentpage<=0,false);

    // prev page
    if(($page=$currentpage-1)<0)
      $page=0;
    if($currentpage == 0){
      $buttons[] = "<span style='background:#a3a3a3'><上一頁</span>";
    }else{
      $buttons[]=$this->createpagebutton($this->prevpagelabel,$page,$this->previouspagecssclass,$currentpage<=0,false);
    }
    // internal pages start
    // first
    $buttons[]=$this->createpagebutton(1,0,$this->internalpagecssclass,false,$i==$currentpage);
    //middle
    if($ellipsis == 'both'){
      $buttons[] = "<span style='background:#a3a3a3'>...</span>";
    }
    for($i=$beginpage;$i<=$endpage;++$i){
      if($ellipsis == 'left' && $i == $beginpage){
        $buttons[] = "<span style='background:#a3a3a3'>...</span>";
      }
      $buttons[]=$this->createpagebutton($i+1,$i,$this->internalpagecssclass,false,$i==$currentpage);
      if($ellipsis == 'right' && $i == $endpage){
        $buttons[] = "<span style='background:#a3a3a3'>...</span>";
      }
    }  
    if($ellipsis == 'both'){
      $buttons[] = "<span style='background:#a3a3a3'>...</span>";
    }
    // last
    $buttons[]=$this->createpagebutton($pagecount,$pagecount - 1,$this->internalpagecssclass,false,$i==$currentpage);
    // internal pages end
    // next page
    if(($page=$currentpage+1)>=$pagecount-1)
      $page=$pagecount-1;
    if($currentpage == ($pagecount-1)){
      $buttons[] = "<span style='background:#a3a3a3'>下一頁></span>";
    }else{
      $buttons[]=$this->createpagebutton($this->nextpagelabel,$page,$this->nextpagecssclass,$currentpage>=$pagecount-1,false);
    }
    // last page
    //$buttons[]=$this->createpagebutton($this->lastpagelabel,$pagecount-1,$this->lastpagecssclass,$currentpage>=$pagecount-1,false);

    return $buttons;
  }

  /**
   * creates a page button.
   * you may override this method to customize the page buttons.
   * @param string $label the text label for the button
   * @param integer $page the page number
   * @param string $class the css class for the page button.
   * @param boolean $hidden whether this page button is visible
   * @param boolean $selected whether this page button is selected
   * @return string the generated button
   */
  protected function createpagebutton($label,$page,$class,$hidden,$selected)
  {
    if($hidden || $selected)
      $class.=' '.($hidden ? $this->hiddenpagecssclass : $this->selectedpagecssclass);
    if ($selected) {
      $result = "<span>" . ++$page . "</span>";
    } else {
      $result = chtml::link($label,$this->createpageurl($page));
    }
    return $result;
  }

  /**
   * @return array the begin and end pages that need to be displayed.
   */
  protected function getpagerange()
  {
    $currentpage=$this->getcurrentpage();
    $pagecount=$this->getpagecount();
    /*$beginpage=max(0, $currentpage-(int)($this->maxbuttoncount/2));
    if(($endpage=$beginpage+$this->maxbuttoncount-1)>=$pagecount)
    {
      $endpage=$pagecount-1;
      $beginpage=max(0,$endpage-$this->maxbuttoncount+1);
    }*/
    if($pagecount > $this->maxbuttoncount){
      if($currentpage > 4 && $currentpage < ($pagecount - 4)){
        // print_r('a');
        $beginpage = $currentpage - 2;
        $endpage = $currentpage + 2;
        $ellipsis = 'both';
      }else{
        $beginpage=max(1, $currentpage-(int)($this->maxbuttoncount/2));
        if($beginpage == 1){
          $ellipsis = 'right';
        }else{
          $ellipsis = 'left';
        }
        if(($endpage=$beginpage+$this->maxbuttoncount-1)>=$pagecount)
        {
          // print_r('b');
          $endpage=$pagecount-2;
          $beginpage=max(1,$endpage-$this->maxbuttoncount+1);
        }elseif(($endpage=$beginpage+$this->maxbuttoncount-1)>=$pagecount-2){
          // print_r('c');
          $endpage=$pagecount-2;
        }

      }
    }else{
      $beginpage=max(1, $currentpage-(int)($this->maxbuttoncount/2));
      if(($endpage=$beginpage+$this->maxbuttoncount-1)>=$pagecount)
      {
        $endpage=$pagecount-2;
        $beginpage=max(1,$endpage-$this->maxbuttoncount+1);
      }
    }

    return array($beginpage,$endpage, $ellipsis);
  }

  /**
   * registers the needed client scripts (mainly css file).
   */
  public function registerclientscript()
  {
    if($this->cssfile!==false)
      self::registercssfile($this->cssfile);
  }

  /**
   * registers the needed css file.
   * @param string $url the css url. if null, a default css url will be used.
   */
  public static function registercssfile($url=null)
  {
    if($url===null)
      $url=chtml::asset(yii::getpathofalias('system.web.widgets.pagers.pager').'.css');
    yii::app()->getclientscript()->registercssfile($url);
  }
}

3、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：

$this->widget('zii.widgets.clistview', array(
  'dataprovider'=>$dataprovider,
  'itemview'=>'_view_t',
  'pager'=>array(
  'class'=>'mypager',
 )
));

如有疑问请留言或者到本站社区交流讨论，感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！