AS3 Stepping Device

When writing stepping, the general requirements of TextField can also support input, and is greater than or equal to 0 of meaningful numbers, such as "01" is not possible. Here you need to introduce a little knowledge (in the spirit of not knowing, knowing the purpose of understanding)

Event:

Textevent.text_input

Event.change

First, textevent.text_input: There is text to be entered, and is an input of one (to be explained later)

Event.change : triggered after text input

For: TextField, there is a read-only property: Careindex, meaning: The index of the position of the cursor insertion point

Well, the previous stepper was implemented:

 package com.niuniu.module.room.view.item{ import com.game.common.config; import  com.game.common.GameUtil; import com.game.common.StageInfo; import  com.game.modulebase.view.baseview; import com.game.modulecall.modulecallmanger; import  com.game.ui.layer.layermanager; import com.game.ui.layer.layertype; import  com.game.ui.reslib.reslib; import com.niuniu.gameeventtypestr; import  com.niuniu.common.usermanager;  import flash.display.simplebutton; import  flash.display.sprite; import flash.events.event; import flash.events.mouseevent;  import flash.events.textevent; import flash.text.textfield; import  flash.text.textfieldtype;  import tw.ui.alertdialog; /**  *  into Chips panel   *  @author  kayer  * */ public final class buychipspanel extends baseview {  private var  $btnClose  : SimpleButton;   private var  $btnMinus  : simplebutton;  private var $ btnplus : simplebutton;  private var  $btnSure  : SimpleButton;   private var  $labValue  : textfield;    private var $ bgmask:sprite;//background Matte   private var  $isMask: Boolean;    private var   $STEPOFF  : uint = 1;  /** The maximum number of chips to buy this time */  private var $ maxbuyingchips : uint = 0;  /** text */  private var  $text   : string;  /**   *  @param   $isMask  :  modal    *   @param   $STEPOFF  :  Stepper Step Size    * */  public function  Buychipspanel (  $isMask &Nbsp;: boolean = true ,  $stepOff  : uint = 1 )   {    this. $isMask  =  $isMask,    this $stepOff  =  $stepOff;    this. $maxBuyingChips  = config.maxchipsbuywhthmobean (  usermanager.instance.myselfmobean );    super ();  }  override  Protected function initdis (): Void  {   if ( this. $isMask  )     {    this. $bgMask  = new sprite ();     LayerManager.instance.getLayer (Layertype.layer_popup_dialog). AddChild (this. $bgMask);   }    this._mc = reslib.getmovieclip (' com.niuniu.module.room.BuyChips ');// Com.niuniu.module.room.room_view   this.addchild ( this.mc );    this.$ btnclose = this.mc["Btnclose"];   this. $btnMinus  = this.mc["Btnminus"];   this. $btnPlus  = this.mc["Btnplus"];    this. $btnSure  = this.mc["Btnsure"];//btnsure   this. $labValue  = this.mc[" Labvalue "];   this. $labValue. type = textfieldtype.input;//   this.$ Labvalue.mouseenabled = false;   this. $labValue .text =  "0";    super.makeenabled ( true );  }  override public function  Onstageresizelistener (e:event): Void  {   if ( this. $isMask  )     {    if  ( this. $bgMask  != null )  {      this. $bgMask. Graphics.clear ()      this. $bgMask. Graphics.beginfill (  0x000000 , 0.2 )      this. $bgMask. Graphics.drawrect (0,0, Stageinfo.stage.stagewidth,stageinfo.stagE.stageheight);      this. $bgMask. Graphics.endfill ();    }    }   this.setxy (  (stageinfo.width - this.width )  >>1  ,  ( StageInfo.HEIGHT - this.height )  >>1 );  }   override protected function initevent (): void  {   this.$ Btnclose.addeventlistener ( MouseEvent.CLICK , onClickHandler );    this.$ Btnminus.addeventlistener ( MouseEvent.CLICK , onClickHandler );    this.$ Btnplus.addeventlistener ( MouseEvent.CLICK , onClickHandler );    this.$ Btnsure.addeventlistener ( MouseEvent.CLICK , onClickHandler );    this.$ Labvalue.addeventlistener ( TextEvent.TEXT_INPUT , onChipsNumChange );    this. $labValue. AddEventListener ( eVent. change , onchipsnumchangea );    stageinfo.stage.addeventlistener (Event.RESIZE,  onstageresizelistener);   }  override protected function removeevent () : Void  {   this. $btnClose. RemoveEventListener ( MouseEvent.CLICK ,  onclickhandler )    this. $btnMinus. RemoveEventListener ( MouseEvent.CLICK ,  onclickhandler )    this. $btnPlus. RemoveEventListener ( MouseEvent.CLICK ,  onclickhandler )    this. $btnSure. RemoveEventListener ( MouseEvent.CLICK ,  onclickhandler );    this. $labValue. RemoveEventListener ( textevent.text_input ,  onChipsNumChange     this. $labValue. RemoveEventListener ( event.change ,  onChipsNumChangeA );    stageinfo.stage.addeventlistener (event.resize,  Onstageresizelistener); &nbSp; }  private function onclickhandler (  $e  : MouseEvent )  :  void  {   switch (  $e .target.name )    {     case  "Btnclose":      this.destroy ();      break;    case  "Btnminus":      trace ("BtnMinus");      this.stephandlder ( - this. $STEPOFF  );      break;    case  "Btnplus":      trace ("BtnPlus");      this.stephandlder ( this. $STEPOFF  );     break;     case  "Btnsure":      trace ("Btnsure");      this.onsure ();      break;   }  }  private  function onchipsnumchange(  $e  : TextEvent )  : void  {   if (  this.$ LABVALUE.TEXT.SUBSTR (0,1)  ==  "0"  &&  ($e. Currenttarget as textfield). caretindex > 0 )    {    this. $text  = this.$ Labvalue.text;   }   else   {    if (  IsNaN ( number ($e. Text)   )  )      this. $text  = this.$ Labvalue.text;    else if ( int (  $e .text )  == 0 )       {     if (  ($e. Currenttarget as textfield). caretindex == 0 )       this. $text  = this. $labValue. Text ;      else      this. $text  =  "";     }   &nbSp;else     this. $text  =  "";   }  }   Private function onchipsnumchangea (  $e  : Event )  : void  {    if ( this. $text  !=  ""  )     this. $labValue. text =  this. $text;   else   {    var buffer :  Number = number ( this. $labValue .text );     if ( buffer >  this. $maxBuyingChips  )      this. $labValue. text = this.$ Maxbuyingchips.tostring ();   }  }  /**   *  display     * */  public function show ()  : void  {    onstageresizelistener (null);    layermanager.instance.getlayer (LayerType.LAYER_POPUP_ DIALOG). AddChild (this); &NBSP;&NBSP;}&Nbsp; /**   *  Handling Redemption    * */  private function  Onsure ()  : void  {   if ( uint ( gameutil.trim (this. $labValue. Text  )  )  <= 0 )    {    alertdialog.createwarnwin (   " , " Please reset the redemption amount! ",  0 , alertdialog.viewok , function (  $e  :   String );   }   : void{  } , true )   else   {    modulecallmanger.dise ( GameEventTypeStr.NOTYFY _magicbean_2_chips_req , uint ( gameutil.trim (this. $labValue .text )  )  );     this.destroy ();   }  }  /**   *  Implementing the Stepper Algorithm    *  @param   $off  :  (+-  stepping Step)    * */   private function&nBsp;stephandlder (  $off  : int )  : void  {   var  Buffer : number = number ( this. $labValue .text )  +  $off;    if ( buffer >= 0 )    {    if ( buffer  <= this. $maxBuyingChips  )      this. $labValue .text =  Buffer.tostring ();     else    {     this.$ Labvalue.text == this. $maxBuyingChips. toString ();    }   }   }  override protected function removedis ():void  {    if ( this. $isMask  )    {    if ( this. $bgMask  != null  )     {     layermanager.instance.getlayer (LayerType.LAYER_ Popup_dialog). RemoveChild (this.$Bgmask);      this. $bgMask  = null;    }    }  }  override public function destroy ():void  {    super.destroy ();   } }}

Now you need to explain: Textevent.text_input , one of the input "Woshi" when

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First get: "W", Get "O" for the second time, because textevent.text_input: There is text to be entered (the value of target (TextField) does not change, the cursor does not change), so, Careindex has been 1 (at the default value "0" Input later)

650) this.width=650; "Src=" Http://s5.51cto.com/wyfs02/M02/84/79/wKioL1eRnkvhM4kaAAC_WYA2-1E672.png-wh_500x0-wm_3 -wmp_4-s_3010703698.png "style=" Float:none; "title=" "W" "alt=" Wkiol1ernkvhm4kaaac_wya2-1e672.png-wh_50 "/>

650) this.width=650; "Src=" Http://s3.51cto.com/wyfs02/M00/84/79/wKiom1eRnkyRWJi8AACt7_vSyEU387.png-wh_500x0-wm_3 -wmp_4-s_2557910954.png "style=" Float:none; "title=" "O" "alt=" Wkiom1ernkyrwji8aact7_vsyeu387.png-wh_50 "/>

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AS3 Stepping Device