/**

* 通用的树型类，可以生成任何树型结构

*/

class tree {

/**

* 生成树型结构所需要的2维数组

* @var array

*/

public $arr = array();

/**

* 生成树型结构所需修饰符号，可以换成图片

* @var array

*/

public $icon = array('│','├','└');

public $nbsp = " ";

/**

* @access private

*/

public $ret = '';

/**

* 构造函数，初始化类

* @param array 2维数组，例如：

* array(

*      1 => array('id'=>'1','parentid'=>0,'name'=>'一级栏目一'),

*      2 => array('id'=>'2','parentid'=>0,'name'=>'一级栏目二'),

*      3 => array('id'=>'3','parentid'=>1,'name'=>'二级栏目一'),

*      4 => array('id'=>'4','parentid'=>1,'name'=>'二级栏目二'),

*      5 => array('id'=>'5','parentid'=>2,'name'=>'二级栏目三'),

*      6 => array('id'=>'6','parentid'=>3,'name'=>'三级栏目一'),

*      7 => array('id'=>'7','parentid'=>3,'name'=>'三级栏目二')

*      )

*/

public function init($arr=array()){

$this->arr = $arr;

$this->ret = '';

return is_array($arr);

}

/**

* 得到父级数组

* @param int

* @return array

*/

public function get_parent($myid){

$newarr = array();

if(!isset($this->arr[$myid])) return false;

$pid = $this->arr[$myid]['parentid'];

$pid = $this->arr[$pid]['parentid'];

if(is_array($this->arr)){

foreach($this->arr as $id => $a){

if($a['parentid'] == $pid) $newarr[$id] = $a;

}

}

return $newarr;

}

/**

* 得到子级数组

* @param int

* @return array

*/

public function get_child($myid){

$a = $newarr = array();

if(is_array($this->arr)){

foreach($this->arr as $id => $a){

if($a['parentid'] == $myid) $newarr[$id] = $a;

}

}

return $newarr ? $newarr : false;

}

/**

* 得到当前位置数组

* @param int

* @return array

*/

public function get_pos($myid,&$newarr){

$a = array();

if(!isset($this->arr[$myid])) return false;

$newarr[] = $this->arr[$myid];

$pid = $this->arr[$myid]['parentid'];

if(isset($this->arr[$pid])){

$this->get_pos($pid,$newarr);

}

if(is_array($newarr)){

krsort($newarr);

foreach($newarr as $v){

$a[$v['id']] = $v;

}

}

return $a;

}

/**

* 得到树型结构

* @param int ID，表示获得这个ID下的所有子级

* @param string 生成树型结构的基本代码，例如："\$spacer\$name"

* @param int 被选中的ID，比如在做树型下拉框的时候需要用到

* @return string

*/

public function get_tree($myid, $str, $sid = 0, $adds = '', $str_group = ''){

$number=1;

$child = $this->get_child($myid);

if(is_array($child)){

$total = count($child);

foreach($child as $id=>$value){

$j=$k='';

if($number==$total){

$j .= $this->icon[2];

}else{

$j .= $this->icon[1];

$k = $adds ? $this->icon[0] : '';

}

$spacer = $adds ? $adds.$j : '';

$selected = $id==$sid ? 'selected' : '';

@extract($value);

$parentid == 0 && $str_group ? eval("\$nstr = \"$str_group\";") : eval("\$nstr = \"$str\";");

$this->ret .= $nstr;

$nbsp = $this->nbsp;

$this->get_tree($id, $str, $sid, $adds.$k.$nbsp,$str_group);

$number++;

}

}

return $this->ret;

}

/**

* 同上一方法类似,但允许多选

*/

public function get_tree_multi($myid, $str, $sid = 0, $adds = ''){

$number=1;

$child = $this->get_child($myid);

if(is_array($child)){

$total = count($child);

foreach($child as $id=>$a){

$j=$k='';

if($number==$total){

$j .= $this->icon[2];

}else{

$j .= $this->icon[1];

$k = $adds ? $this->icon[0] : '';

}

$spacer = $adds ? $adds.$j : '';

$selected = $this->have($sid,$id) ? 'selected' : '';

@extract($a);

eval("\$nstr = \"$str\";");

$this->ret .= $nstr;

$this->get_tree_multi($id, $str, $sid, $adds.$k.' ');

$number++;

}

}

return $this->ret;

}

/**

* @param integer $myid 要查询的ID

* @param string $str   第一种HTML代码方式

* @param string $str2  第二种HTML代码方式

* @param integer $sid  默认选中

* @param integer $adds 前缀

*/

public function get_tree_category($myid, $str, $str2, $sid = 0, $adds = ''){

$number=1;

$child = $this->get_child($myid);

if(is_array($child)){

$total = count($child);

foreach($child as $id=>$a){

$j=$k='';

if($number==$total){

$j .= $this->icon[2];

}else{

$j .= $this->icon[1];

$k = $adds ? $this->icon[0] : '';

}

$spacer = $adds ? $adds.$j : '';

$selected = $this->have($sid,$id) ? 'selected' : '';

@extract($a);

if (empty($html_disabled)) {

eval("\$nstr = \"$str\";");

} else {

eval("\$nstr = \"$str2\";");

}

$this->ret .= $nstr;

$this->get_tree_category($id, $str, $str2, $sid, $adds.$k.' ');

$number++;

}

}

return $this->ret;

}

/**

* 同上一类方法，jquery treeview 风格，可伸缩样式(需要treeview插件支持)

* @param $myid 表示获得这个ID下的所有子级

* @param $effected_id 需要生成treeview目录数的id

* @param $str 末级样式

* @param $str2 目录级别样式

* @param $showlevel 直接显示层级数，其余为异步显示，0为全部限制

* @param $style 目录样式 默认 filetree 可增加其他样式如'filetree treeview-famfamfam'

* @param $currentlevel 计算当前层级，递归使用 适用改函数时不需要用该参数

* @param $recursion 递归使用 外部调用时为FALSE

*/

function get_treeview($myid,$effected_id='example',$str="\$name", $str2="\$name" ,$showlevel = 0 ,$style='filetree ' , $currentlevel = 1,$recursion=FALSE) {

$child = $this->get_child($myid);

if(!defined('EFFECTED_INIT')){

$effected = ' id="'.$effected_id.'"';

define('EFFECTED_INIT', 1);

} else {

$effected = '';

}

$placeholder =     '

if(!$recursion) $this->str .='

• ';

foreach($child as $id=>$a) {

@extract($a);

if($showlevel > 0 && $showlevel == $currentlevel && $this->get_child($id)) $folder = 'hasChildren'; //如设置显示层级模式@2011.07.01

$floder_status = isset($folder) ? ' class="'.$folder.'"' : '';

$this->str .= $recursion ? '

• ' : '
• ';

  $recursion = FALSE;

  if($this->get_child($id)){

  eval("\$nstr = \"$str2\";");

  $this->str .= $nstr;

  if($showlevel == 0 || ($showlevel > 0 && $showlevel > $currentlevel)) {

  $this->get_treeview($id, $effected_id, $str, $str2, $showlevel, $style, $currentlevel+1, TRUE);

  } elseif($showlevel > 0 && $showlevel == $currentlevel) {

  $this->str .= $placeholder;

  }

  } else {

  eval("\$nstr = \"$str\";");

  $this->str .= $nstr;

  }

  $this->str .=$recursion ? '

': '';

}

if(!$recursion)  $this->str .='

';

return $this->str;

}

/**

* 获取子栏目json

* Enter description here ...

* @param unknown_type $myid

*/

public function creat_sub_json($myid, $str='') {

$sub_cats = $this->get_child($myid);

$n = 0;

if(is_array($sub_cats)) foreach($sub_cats as $c) {

$data[$n]['id'] = iconv(CHARSET,'utf-8',$c['catid']);

if($this->get_child($c['catid'])) {

$data[$n]['liclass'] = 'hasChildren';

$data[$n]['children'] = array(array('text'=>' ','classes'=>'placeholder'));

$data[$n]['classes'] = 'folder';

$data[$n]['text'] = iconv(CHARSET,'utf-8',$c['catname']);

} else {

if($str) {

@extract(array_iconv($c,CHARSET,'utf-8'));

eval("\$data[$n]['text'] = \"$str\";");

} else {

$data[$n]['text'] = iconv(CHARSET,'utf-8',$c['catname']);

}

}

$n++;

}

return json_encode($data);

}

private function have($list,$item){

return(strpos(',,'.$list.',',','.$item.','));

}

}

?>