php 重写分页器 CLinkPager的实例

2023-09-21 19:44:05 172

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

classMyPagerextendsCLinkPager

入口函数是：publicfunctionrun()，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

'.
*/
public$nextPageLabel;
/**
*@varstringthetextlabelforthepreviouspagebutton.Defaultsto'>'.
*/
public$lastPageLabel;
/**
*@varstringthetextshownbeforepagebuttons.Defaultsto'Gotopage:'.
*/
public$header;
/**
*@varstringthetextshownafterpagebuttons.
*/
public$footer='';
/**
*@varmixedtheCSSfileusedforthewidget.Defaultstonull,meaning
*usingthedefaultCSSfileincludedtogetherwiththewidget.
*Iffalse,noCSSfilewillbeused.Otherwise,thespecifiedCSSfile
*willbeincludedwhenusingthiswidget.
*/
public$cssFile;
/**
*@vararrayHTMLattributesforthepagercontainertag.
*/
public$htmlOptions=array();

/**
*Initializesthepagerbysettingsomedefaultpropertyvalues.
*/
publicfunctioninit()
{
if($this->nextPageLabel===null)
$this->nextPageLabel=Yii::t('yii','Next>');
if($this->prevPageLabel===null)
$this->prevPageLabel=Yii::t('yii','firstPageLabel===null)
//$this->firstPageLabel=Yii::t('yii','<lastPageLabel===null)
//$this->lastPageLabel=Yii::t('yii','Last>>');
if($this->header===null)
$this->header=Yii::t('yii','Gotopage:');

if(!isset($this->htmlOptions['id']))
$this->htmlOptions['id']=$this->getId();
if(!isset($this->htmlOptions['class']))
$this->htmlOptions['class']='yiiPager';
}

/**
*Executesthewidget.
*Thisoverridestheparentimplementationbydisplayingthegeneratedpagebuttons.
*/
publicfunctionrun()
{
$this->registerClientScript();
$buttons=$this->createPageButtons();
if(empty($buttons))
return;
echo$this->header;
//echoCHtml::tag('ul',$this->htmlOptions,implode("\n",$buttons));
echoimplode("\n",$buttons);
echo$this->footer;
}

/**
*Createsthepagebuttons.
*@returnarrayalistofpagebuttons(inHTMLcode).
*/
protectedfunctioncreatePageButtons()
{
if(($pageCount=$this->getPageCount())<=1)
returnarray();

list($beginPage,$endPage,$ellipsis)=$this->getPageRange();

$currentPage=$this->getCurrentPage(false);//currentPageiscalculatedingetPageRange()
$buttons=array();

//firstpage
//$buttons[]=$this->createPageButton($this->firstPageLabel,0,$this->firstPageCssClass,$currentPage<=0,false);

//prevpage
if(($page=$currentPage-1)<0)
$page=0;
if($currentPage==0){
$buttons[]="<上一頁";
}else{
$buttons[]=$this->createPageButton($this->prevPageLabel,$page,$this->previousPageCssClass,$currentPage<=0,false);
}
//internalpagesstart
//first
$buttons[]=$this->createPageButton(1,0,$this->internalPageCssClass,false,$i==$currentPage);
//middle
if($ellipsis=='both'){
$buttons[]="...";
}
for($i=$beginPage;$i<=$endPage;++$i){
if($ellipsis=='left'&&$i==$beginPage){
$buttons[]="...";
}
$buttons[]=$this->createPageButton($i+1,$i,$this->internalPageCssClass,false,$i==$currentPage);
if($ellipsis=='right'&&$i==$endPage){
$buttons[]="...";
}
}
if($ellipsis=='both'){
$buttons[]="...";
}
//last
$buttons[]=$this->createPageButton($pageCount,$pageCount-1,$this->internalPageCssClass,false,$i==$currentPage);
//internalpagesend
//nextpage
if(($page=$currentPage+1)>=$pageCount-1)
$page=$pageCount-1;
if($currentPage==($pageCount-1)){
$buttons[]="下一頁>";
}else{
$buttons[]=$this->createPageButton($this->nextPageLabel,$page,$this->nextPageCssClass,$currentPage>=$pageCount-1,false);
}
//lastpage
//$buttons[]=$this->createPageButton($this->lastPageLabel,$pageCount-1,$this->lastPageCssClass,$currentPage>=$pageCount-1,false);

return$buttons;
}

/**
*Createsapagebutton.
*Youmayoverridethismethodtocustomizethepagebuttons.
*@paramstring$labelthetextlabelforthebutton
*@paraminteger$pagethepagenumber
*@paramstring$classtheCSSclassforthepagebutton.
*@paramboolean$hiddenwhetherthispagebuttonisvisible
*@paramboolean$selectedwhetherthispagebuttonisselected
*@returnstringthegeneratedbutton
*/
protectedfunctioncreatePageButton($label,$page,$class,$hidden,$selected)
{
if($hidden||$selected)
$class.=''.($hidden?$this->hiddenPageCssClass:$this->selectedPageCssClass);
if($selected){
$result="".++$page."";
}else{
$result=CHtml::link($label,$this->createPageUrl($page));
}
return$result;
}

/**
*@returnarraythebeginandendpagesthatneedtobedisplayed.
*/
protectedfunctiongetPageRange()
{
$currentPage=$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);
}
}

returnarray($beginPage,$endPage,$ellipsis);
}

/**
*Registerstheneededclientscripts(mainlyCSSfile).
*/
publicfunctionregisterClientScript()
{
if($this->cssFile!==false)
self::registerCssFile($this->cssFile);
}

/**
*RegisterstheneededCSSfile.
*@paramstring$urltheCSSURL.Ifnull,adefaultCSSURLwillbeused.
*/
publicstaticfunctionregisterCssFile($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',
)
));

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php 重写分页器 CLinkPager的实例

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