Subversion-Projekte lars-tiefland.prado

<?php

class ListPost extends TPage
{
        /**
         * Initializes the repeater.
         * This method is invoked by the framework when initializing the page
         * @param mixed event parameter
         */
        public function onInit($param)
        {
                parent::onInit($param);
                if(!$this->IsPostBack)  // if the page is requested the first time
                {
                        // get the total number of posts available
                        $this->Repeater->VirtualItemCount=PostRecord::finder()->count();
                        // populates post data into the repeater
                        $this->populateData();
                }
        }

        /**
         * Event handler to the OnPageIndexChanged event of the pager.
         * This method is invoked when the user clicks on a page button
         * and thus changes the page of posts to display.
         */
        public function pageChanged($sender,$param)
        {
                // change the current page index to the new one
                $this->Repeater->CurrentPageIndex=$param->NewPageIndex;
                // re-populate data into the repeater
                $this->populateData();
        }

        /**
         * Determines which page of posts to be displayed and
         * populates the repeater with the fetched data.
         */
        protected function populateData()
        {
                $offset=$this->Repeater->CurrentPageIndex*$this->Repeater->PageSize;
                $limit=$this->Repeater->PageSize;
                if($offset+$limit>$this->Repeater->VirtualItemCount)
                        $limit=$this->Repeater->VirtualItemCount-$offset;
                $this->Repeater->DataSource=$this->getPosts($offset,$limit);
                $this->Repeater->dataBind();
        }

        /**
         * Fetches posts from database with offset and limit.
         */
        protected function getPosts($offset, $limit)
        {
                // Construts a query criteria
                $criteria=new TActiveRecordCriteria;
                $criteria->OrdersBy['create_time']='desc';
                $criteria->Limit=$limit;
                $criteria->Offset=$offset;
                // query for the posts with the above criteria and with author information
                return PostRecord::finder()->withAuthor()->findAll($criteria);
        }
}

?>