as3分页——页数多了后自动居中类似谷歌分页

4月21，学习心的

package myapp.view
{
 import flash.display.Loader;
 import flash.events.MouseEvent;
 import flash.net.URLRequest;
 
 import myapp.model.RoomProxy;
 
 import org.puremvc.as3.interfaces.IMediator;
 import org.puremvc.as3.patterns.mediator.Mediator;

 public class ActorListMediator extends Mediator implements IMediator
 {
  static public const NAME:String = "ActorListMediator";
  
  private var _al:actorList;
  
  private var _od:int = 0;
  
  private var _allArray:Array;
  
  private var _sa:actorCell;
  
  public var _goHall:Boolean = false;
  
  public function ActorListMediator(obj:Object=null)
  {
   super(NAME, obj);
   _al.x=6;
   _al.y=138;
   initPageBtn();
   main.addChild(_al);
  }

  /**
   * 改变页数的方法
   * ---------------------------↓ 总页数-------↓ 当前页数
   **/
  private function doChangePage(pageCount:int,nowPage:int):void{
   //间距 27
   if(pageCount == nowPage){
    _al.btnDown.visible = false;
    _al.btnUp.visible = true;
   }
   if(nowPage == 1){
    _al.btnDown.visible = true;
    _al.btnUp.visible = false;
   }
   if(pageCount == 1){
    _al.btnDown.visible = false;
    _al.btnUp.visible = false;
   }

   for(var i:uint = 1;i<11;i++){
    if(i<=pageCount){
     _al["btn"+i+""].visible = true;
    }
    _al["btn"+i+""].txt.text = i;
    _al["btn"+i+""].addEventListener(MouseEvent.CLICK,pageBtnClick);
   }
    
   _al.btnUp.addEventListener(MouseEvent.CLICK,pageBtnClick);
   _al.btnDown.addEventListener(MouseEvent.CLICK,pageBtnClick);
   
   _al.btnMask.x = _al["btn"+nowPage+""].x;
   _al.btnMask.txt.text =  _al["btn"+nowPage+""].txt.text;
  }
  
  public function get getMain():Main{
   return viewComponent as Main;
  }


  private function initPageBtn():void{
   for(var i:uint = 1;i<11;i++){
    _al["btn"+i+""].visible = false;
   }
   _al.btnDown.txt.text = "下一页";
  }
  
  private function pageBtnClick(e:MouseEvent):void{
   switch(e.target.txt.text){
    case "1":_al.btnUp.visible = false;
      _al.btnDown.visible = true;break;
    //case Math.ceil(_allArray.length/12)+"":_al.btnUp.visible = true;
    case "20":_al.btnUp.visible = true;
      _al.btnDown.visible = false;break;
     default :
     //不是第一个，也不是最后一个，中间的情况，如果点击第6个，位移←，
     btnMove(e.target.txt.text,e.target.name);
   }
  }
  
  /**
   * 根据按钮名字所判断执行的操作
   * ---------------------↓ 页数------↓ 被点中的按钮名称
   **/
  private function btnMove(txt:String,name:String):void{
   switch(name){
    case "btn1":doMove(4,false,parseInt(txt));break;
    case "btn2":doMove(3,false,parseInt(txt));break;
    case "btn3":doMove(2,false,parseInt(txt));break;
    case "btn4":doMove(1,false,parseInt(txt));break;
    case "btn5":if(Math.ceil(_allArray.length/12)==5){
        _al.btnUp.visible = true;
        _al.btnDown.visible = false;
       }else{
        _al.btnUp.visible = true;
       }break;
    case "btn6":doMove(1,true,parseInt(txt));break;
    case "btn7":doMove(2,true,parseInt(txt));break;
    case "btn8":doMove(3,true,parseInt(txt));break;
    case "btn9":doMove(4,true,parseInt(txt));break;
    case "btn10":doMove(5,true,parseInt(txt));break;
    case "btnUp":doMove(1,false,parseInt(txt),1);break;
    case "btnDown":doMove(1,true,parseInt(txt),2);break;
   }
  }
  
  /**
   * --------------------↓移动数量-------↓移动方向-----------
   * -------------------------------点中的页数--↓是否上页-1是，2下页，3其他↓
   **/
  private function doMove(moveTotal:int,direction:Boolean,txt:int,isUp:int=3):void{
   var temp:int;
   //上页可能出现没有第2页的问题，这个是中间变量！
   var tr:Boolean = false;
   if(isUp == 1){
    txt = parseInt(_al.btnMask.txt.text);
    txt--;
    tr = true;
   }
   if(isUp == 2){
    txt = parseInt(_al.btnMask.txt.text);
    txt++;
   }
   if(txt<=5 && _al.btn1.txt.text == "1"){
    if(txt == 1){
     _al.btnUp.visible = false;
    }else{
     _al.btnUp.visible = true;
    }
    for(var i2:int = 1;i2<=5;i2++){
     temp = parseInt(_al["btn"+i2].txt.text);
     if(temp == txt){
      _al.btnMask.x = _al["btn"+i2].x;
      _al.btnMask.txt.text = _al["btn"+i2].txt.text;
     }
    }
    return;
   }
   //if((txt+5) >= Math.ceil(_allArray.length/12) && parseInt(_al.btn10.txt.text) == Math.ceil(_allArray.length/12)){
   if((txt+5)>=(20) && _al.btn10.txt.text == "20"){
    //if(txt == Math.ceil(_allArray.length/12))
    if(txt == 20){
     _al.btnDown.visible = false;
    }else{
     _al.btnDown.visible = true;
    }
    for(var i3:int = 5;i3<=10;i3++){
     temp = parseInt(_al["btn"+i3].txt.text);
     if(temp == txt){
      _al.btnMask.x = _al["btn"+i3].x;
      _al.btnMask.txt.text = _al["btn"+i3].txt.text;
     }
    }
    return;
   }
   
   if(direction){
    //公式
    //moveTotal>Math.ceil(_allArray.length/12)?Math.ceil(_allArray.length/12)-
    moveTotal = parseInt(_al["btn10"].txt.text)+moveTotal>20?20-parseInt(_al["btn10"].txt.text):moveTotal;
    for(var i:int=1;i<11;i++){
     temp = parseInt(_al["btn"+i].txt.text)+moveTotal;
     _al["btn"+i].txt.text = temp+"";
     
     if(parseInt(_al["btn"+i].txt.text) == txt){
      _al.btnMask.x = _al["btn"+i].x;
      _al.btnMask.txt.text = _al["btn"+i].txt.text;
     }
    }
    _al.btnUp.visible = true;
   }else{
    //公式
    moveTotal = parseInt(_al["btn1"].txt.text)-moveTotal<0?moveTotal-(moveTotal-parseInt(_al["btn1"].txt.text)):moveTotal;
    
    for(var j:int=1;j<11;j++){
     if(tr){
      temp = parseInt(_al["btn"+j].txt.text)-moveTotal;
     }else{
      if(parseInt(_al["btn1"].txt.text)-moveTotal == 0){
       temp = parseInt(_al["btn"+j].txt.text)-moveTotal+1;
      }else{
       temp = parseInt(_al["btn"+j].txt.text)-moveTotal;
       try{
        if(temp == parseInt(_al["btn"+(j-1)].txt.text)){
         temp ++;
        }
       }catch(e:Error){}
      }
     }
     _al["btn"+j].txt.text = temp+"";
     if(parseInt(_al["btn"+j].txt.text) == txt){
      _al.btnMask.x = _al["btn"+j].x;
      _al.btnMask.txt.text = _al["btn"+j].txt.text;
     }
    }
    _al.btnDown.visible = true;
   }
  }
 }
}

 

 

残缺的类，完整的分页片段，给自己参考！

 

 

 

转自：http://fashionwll.blog.163.com/blog/static/8255017720093213117668/