package com.ourbrander.webObj.component.scrollBar{
/*
奥博瑞德文本滚动条1.2(AS3)
QQ:14238910 Q群：技术不是唯一:1934054
使用方法：
构造函数：textScrollbar(target:TextField)
设置皮肤：setInterface(target:MovieClip) target包括upBtn（按钮）、downBtn（按钮）、bg（电影剪辑）、dragMc（电影剪辑）。
设置离目标文本框的右边距离 public function set dx(value:Number)
设置离目标文本框的顶部距离 public function set dy(value:Number)
设置滚动条滑动按钮高度是否锁定 public function set _lockBarHeight(value:Boolean)
设置滚动条的高度 public function set _height(value:Number)
获取滚动条的高度 public function get _height()
事件:
public static scrollBar.LOCKED 改变滑动条状态为锁定高度时发出
public static scrollBar.UNLOCK 改变滑动条状态为不锁定高度时发出
public static scrollBar.SETINTERFACE 改变了滚动条样式时发出
public static scrollBar.BGCLICKED 滚动条背景被点击时发出
public static scrollBar.BARSCROLLING 滚动条滑动按钮开始被拖拽时发出（鼠标滚动滑动文本框不发送此事件）
public static scrollBar.BARSCROLLSTOPED 滚动条滑动按钮停止拖拽时发出（鼠标滚动滑动文本框不发送此事件）
注意：要对文本框的状态进行监控，只需要侦听目标文本框发出的事件即可，这里就不多余添加了。
*/
import flash.display.Sprite;
import flash.display.MovieClip;
import flash.text.TextField;
import flash.display.SimpleButton;
import flash.events.MouseEvent;
import flash.geom.Rectangle;
import flash.events.Event;
import flash.events.TextEvent
import flash.ui.Mouse;
import flash.events.EventDispatcher;
public class textScrollbar extends MovieClip {
//视图设定
private var _Skin:MovieClip;
private var _targetTextField:TextField;
private var _upBtn:SimpleButton;
private var _downBtn:SimpleButton;
private var _bg:MovieClip;
private var _dragMc:MovieClip;
//变量设定
private var _dx:Number;//滚动条相对文本框的X坐标距离
private var _dy:Number;//滚动条相对文本框的X坐标距离
private var HEIGHT:*//滚动条的高度
private var _lockBarHeight:Boolean;
//滚动条滑动按钮高度锁定状态，默认为false
public static const SETINTERFACE="setInterface"
public static const LOCKED="locked";
public static const UNLOCK="unlock";
public static const BGCLICKED="bgclicked"
public static const BARSCROLLING="barscrolling"
public static const BARSCROLLSTOPED="barscrollstop"
public function textScrollbar(target:TextField) {//构造函数
_targetTextField=target;
DataInit();
}
public function setInterface(target:MovieClip) {//更换滚动条的皮肤
if (_Skin==null) {
} else {
this.removeChild(_Skin);
dispatchEvent(new Event(SETINTERFACE));
}
_Skin=target;
_upBtn=_Skin.upBtn;
_downBtn=_Skin.downBtn;
_bg=_Skin.bg;
_dragMc=_Skin.dragMc;
setSkin();
_downBtn.addEventListener(MouseEvent.MOUSE_DOWN,function(){_downBtn.addEventListener(Event.ENTER_FRAME,rollDown);});
_downBtn.addEventListener(MouseEvent.MOUSE_UP,function (){_downBtn.removeEventListener(Event.ENTER_FRAME,rollDown)});
_upBtn.addEventListener(MouseEvent.MOUSE_DOWN,function(){_upBtn.addEventListener(Event.ENTER_FRAME,rollUp);});
_upBtn.addEventListener(MouseEvent.MOUSE_UP,function (){_upBtn.removeEventListener(Event.ENTER_FRAME,rollUp)});
_dragMc.buttonMode=true;
_dragMc.addEventListener(MouseEvent.MOUSE_DOWN,dragScroll);
_dragMc.addEventListener(MouseEvent.MOUSE_UP,stopdragScroll);
_targetTextField.addEventListener(Event.SCROLL,rolling);
_targetTextField.addEventListener(Event.CHANGE,rolling);
_bg.addEventListener(MouseEvent.CLICK,bgclick);
setdragMc();
addChild(_Skin);
}
private function DataInit() {
_dx=0;
_dy=0;
_lockBarHeight=false;
}
private function setSkin() {
_upBtn.x=0;
_upBtn.y=0;
if (_upBtn.getRect(this).y<0) {
_upBtn.y=- _upBtn.getRect(_Skin).y;
}
var tmp_h=(HEIGHT!=undefined)?HEIGHT:_targetTextField.height;
var h=tmp_h-_upBtn.height-_downBtn.height;
_bg.x=0;
_bg.height=h;
_bg.y=_upBtn.height+0;
_downBtn.x=0;
_downBtn.y=_bg.y+_bg.height;
this.dx=0;
this.dy=0
}
public function set dx(value:Number) {//设置滚动条的X坐标偏移量
_dx=value;
this.x=_targetTextField.x+_targetTextField.width+_dx;
}
public function set dy(value:Number) {//设置滚动条的Y坐标偏移量
_dy=value;
this.y=_targetTextField.y+_dy;
}
public function set _height(_value:Number) {//设置滚动条的高度
HEIGHT=_value;
_bg.height=HEIGHT-_upBtn.height-_downBtn.height;
_downBtn.y=_bg.y+_bg.height;
setdragMc()
}
public function get _height() {
var tmpheight=HEIGHT;
return tmpheight;
}
public function set lockBarHeight(_value:Boolean) {//滚动条滑动按钮高度锁定状态
_lockBarHeight=_value;
if (_lockBarHeight==true) {
dispatchEvent(new Event(LOCKED));
} else {
dispatchEvent(new Event(UNLOCK));
}
}
public function get lockBarHeight() {
var tmp_lockBarHeight=_lockBarHeight;
return tmp_lockBarHeight;
}
private function rollUp(e) {
if (_targetTextField.scrollV==1) {
_dragMc.y=(_bg.y);
} else {
_targetTextField.scrollV--;
}
}
private function rollDown(e) {
if (_targetTextField.scrollV==_targetTextField.maxScrollV) {
_dragMc.y=(_bg.y+_bg.height-_dragMc.height);
} else {
_targetTextField.scrollV++;
}
}
private function dragScroll(e) {
var rec:Rectangle=new Rectangle(_bg.x,_bg.y,0,_bg.height-e.target.height);
e.target.startDrag(false,rec);
this.addEventListener(Event.ENTER_FRAME,scrollText);
stage.addEventListener(MouseEvent.MOUSE_UP,stopdragScroll);
dispatchEvent(new Event(BARSCROLLING));
}
private function stopdragScroll(e=null) {
_dragMc.stopDrag();
this.removeEventListener(Event.ENTER_FRAME,scrollText);
stage.removeEventListener(MouseEvent.MOUSE_UP,stopdragScroll);
_targetTextField.addEventListener(Event.SCROLL,rolling);
dispatchEvent(new Event(BARSCROLLSTOPED));
}
private function rolling(e=null) {
setdragMc();
}
private function scrollText(e=null) {
_targetTextField.removeEventListener(Event.SCROLL,rolling);
_targetTextField.scrollV=Math.ceil(((_dragMc.y-_bg.y)/(_bg.height-_dragMc.height))*(_targetTextField.maxScrollV))
}
private function setdragMc() {
_bg.addEventListener(MouseEvent.CLICK,bgclick);
var tmplines=_targetTextField.numLines-_targetTextField.maxScrollV+1;
var p=(tmplines)/_targetTextField.numLines;
var tmpHeight=Math.round((p)*_bg.height);
if (_targetTextField.maxScrollV>1) {//如果文本框的内容多于可显示行数
_dragMc.visible=true;
_upBtn.enabled=true;
_downBtn.enabled=true;
if (_lockBarHeight==false) {//如果滚动条的按钮高度没有被锁定
_dragMc.y=_bg.y+((_targetTextField.scrollV-1)/(_targetTextField.maxScrollV-1))*(_bg.height-tmpHeight);
if (tmpHeight<=5) {
_dragMc.height=5;
} else {
_dragMc.height=tmpHeight;
}
} else {//如果滚动条的按钮高度被锁定
if(_dragMc.height>_bg.height){
_dragMc.height=(tmpHeight>5)?tmpHeight:5
}
_dragMc.y=_bg.y+((_targetTextField.scrollV-1)/(_targetTextField.maxScrollV-1))*(_bg.height-_dragMc.height);
}//end if
} else {
_dragMc.visible=false;
_upBtn.enabled=false;
_downBtn.enabled=false;
_bg.removeEventListener(MouseEvent.CLICK,bgclick);
}//end if
}//end runction
private function bgclick(e) {//滚动条背景点击文本框快速定位
if (this.mouseY<=_dragMc.y) {
_dragMc.y=this.mouseY;
trace(this.mouseY+"/"+e.localY);
} else {
_dragMc.y=(this.mouseY-_dragMc.y-_dragMc.height)+_dragMc.y;
}
scrollText();
stopdragScroll();
dispatchEvent(new Event(BGCLICKED));
}
}
}