分享一个ToolTip类，趋于完美！
package myas{ import flash.display.*; import flash.events.*; import flash.filters.*; import flash.geom.*; import flash.text.*; //import flash.utils.Timer; import fl.transitions.Tween; import fl.transitions.easing.*; import fl.transitions.TweenEvent; /** * Example: var tt:ToolTip = new ToolTip(); tt.show( DisplayObject, "", "这里是信息" ); 或： var tf:TextFormat = new TextFormat(); tf.bold = true; tf.size = 12; tf.color = 0xff0000; var contentFormat:TextFormat = new TextFormat(); contentFormat.size = 14; contentFormat.color = 0xFFFFFF; contentFormat.bold = false; var tt:ToolTip = new ToolTip(); tt.hook = true; tt.hookSize = 20; tt.cornerRadius = 20; tt.align = "center"; tt.titleFormat = tf; tt.contentFormat = contentFormat; tt.show( DisplayObject, "Title Of This ToolTip", "Some Copy that would go below the ToolTip Title" ); * ****** by zcheng 2011-3-22 626272689@qq.com 基于* @author Duncan Reid, www.hy-brid.com * @date October 17, 2008 * @version 1.1 * */ public class ToolTip extends Sprite { //objects private var _stage:Stage; private var _parentObject:DisplayObject; private var _tf:TextField;// title field private var _cf:TextField;//content field private var _tween:Tween; //formats private var _titleFormat:TextFormat; private var _contentFormat:TextFormat; /* check for format override */ private var _titleOverride:Boolean = false; private var _contentOverride:Boolean = false; //defaults private var _defaultWidth:Number = 200;//宽 private var _buffer:Number = 10;//四周留白数 private var _align:String = "right";//箭头位置 private var _cornerRadius:Number = 4;//圆角度数 private var _bgColors:Array = [0xFFF4E1,0xFFF4E1]; //private var _bgColors:Array = [0xB5FEB4,0x003300];//背景色 private var _autoSize:Boolean = false;//自动调整大小 private var _hookEnabled:Boolean = true;//有无箭头 //private var _delay:Number = 0; //延迟出现毫秒数，已精简 private var _hookSize:Number = 10;//箭头大小 //offsets private var _offSet:Number; private var _hookOffSet:Number; public function ToolTip():void { //do not disturb parent display object mouse events this.mouseEnabled = false; this.buttonMode = false; this.mouseChildren = false; //setup delay timer /*_timer = new Timer(this._delay, 1); _timer.addEventListener("timer", timerHandler);*/ this.animate(true); } public function show( p:DisplayObject, title:String, content:String=null ):void { //get the stage from the parent this._stage = p.stage; this._parentObject = p; this.addCopy( title, content ); this.setOffset(); this.drawBG(); this.bgGlow(); //initialize coordinates var parentCoords:Point = new Point(_parentObject.mouseX,_parentObject.mouseY); var globalPoint:Point = p.localToGlobal(parentCoords); this.x = globalPoint.x + this._offSet; this.y = globalPoint.y - this.height - 10; this.alpha = 0; this._stage.addChild( this ); this._parentObject.addEventListener( MouseEvent.MOUSE_OUT, this.onMouseOut ); //removed mouse move handler in lieu of enterframe for smoother movement; //this._parentObject.addEventListener( MouseEvent.MOUSE_MOVE, this.onMouseMovement ); this.follow( true ); //_timer.start(); } public function hide():void { this.animate( false ); } /*private function timerHandler( event:TimerEvent ):void { this.animate(true); }*/ private function onMouseOut( event:MouseEvent ):void { event.currentTarget.removeEventListener(event.type, arguments.callee); this.hide(); } private function follow( value:Boolean ):void { if (value) { addEventListener( Event.ENTER_FRAME, this.eof ); } else { removeEventListener( Event.ENTER_FRAME, this.eof ); } } private function eof( event:Event ):void { this.position(); } private function position():void { var speed:Number = 3; var parentCoords:Point = new Point(_parentObject.mouseX,_parentObject.mouseY); var globalPoint:Point = _parentObject.localToGlobal(parentCoords); var xp:Number = globalPoint.x + this._offSet; var yp:Number; if ((_hookEnabled &&globalPoint.y>this.height) || (!_hookEnabled &&globalPoint.y>this.height+10)) { yp = globalPoint.y - this.height - 10; if (! _hookEnabled) { _hookEnabled = true; this.graphics.clear(); drawBG(); } } else if (stage.stageHeight/2>this.height) { yp = globalPoint.y + 25; if (_hookEnabled) { _hookEnabled = false; this.graphics.clear(); drawBG(); } } var overhangRight:Number = this._defaultWidth + xp; if (overhangRight > stage.stageWidth) { xp = stage.stageWidth - this._defaultWidth; } if (xp < 0) { xp = 0; } if (yp < 0) { yp = 0; } this.x += ( xp - this.x ) / speed; this.y += ( yp - this.y ) / speed; } private function addCopy( title:String, content:String ):void { if (! this._titleOverride) { this.initTitleFormat(); } var titleIsDevice:Boolean = this.isDeviceFont(_titleFormat); this._tf = this.createField(titleIsDevice); this._tf.htmlText = title; this._tf.setTextFormat( this._titleFormat); //this._tf.setTextFormat( this._titleFormat, 0, title.length ); if (this._autoSize) { this._defaultWidth = this._tf.textWidth + 4 + ( _buffer * 2 ); } else { this._tf.width = this._defaultWidth - ( _buffer * 2 ); } this._tf.x = this._tf.y = this._buffer; this.textGlow( this._tf ); addChild( this._tf ); if (content != null) { if (! this._contentOverride) { this.initContentFormat(); } //check for device font var contentIsDevice:Boolean = this.isDeviceFont(_contentFormat); this._cf = this.createField(contentIsDevice); this._cf.htmlText = content; var bounds:Rectangle = this.getBounds(this); this._cf.x = this._buffer; this._cf.y = bounds.height + 5; this.textGlow( this._cf ); this._cf.setTextFormat( this._contentFormat ); if (this._autoSize) { var cfWidth:Number = this._cf.textWidth + 4 + ( _buffer * 2 ); this._defaultWidth = cfWidth > this._defaultWidth ? cfWidth:this._defaultWidth; } else { this._cf.width = this._defaultWidth - ( _buffer * 2 ); } addChild( this._cf ); } } //create field, if not device font, set embed to true private function createField( deviceFont:Boolean ):TextField { var tf:TextField = new TextField(); tf.embedFonts = ! deviceFont; tf.gridFitType = "pixel"; //tf.border = true; tf.autoSize = TextFieldAutoSize.LEFT; tf.selectable = false; if (! this._autoSize) { tf.multiline = true; tf.wordWrap = true; } return tf; } //draw background, use drawing api if we need a hook private function drawBG():void { var bounds:Rectangle = this.getBounds(this); var fillType:String = GradientType.LINEAR; //var colors:Array = [0xFFFFFF, 0x9C9C9C]; var alphas:Array = [1,1]; var ratios:Array = [0x00,0xFF]; var matr:Matrix = new Matrix(); var radians:Number = 90 * Math.PI / 180; matr.createGradientBox(this._defaultWidth, bounds.height + ( this._buffer * 2 ), radians, 0, 0); var spreadMethod:String = SpreadMethod.PAD; this.graphics.beginGradientFill(fillType, this._bgColors, alphas, ratios, matr, spreadMethod); if (this._hookEnabled) { var xp:Number = 0; var yp:Number = 0; var w:Number = this._defaultWidth; var h:Number = bounds.height + ( this._buffer * 2 ); this.graphics.moveTo( xp + this._cornerRadius, yp ); this.graphics.lineTo( xp + w - this._cornerRadius, yp ); this.graphics.curveTo( xp + w, yp, xp + w, yp + this._cornerRadius ); this.graphics.lineTo( xp + w, yp + h - this._cornerRadius ); this.graphics.curveTo( xp + w, yp + h, xp + w - this._cornerRadius, yp + h ); //hook this.graphics.lineTo( xp + this._hookOffSet + this._hookSize, yp + h ); this.graphics.lineTo( xp + this._hookOffSet , yp + h + this._hookSize ); this.graphics.lineTo( xp + this._hookOffSet - this._hookSize, yp + h ); this.graphics.lineTo( xp + this._cornerRadius, yp + h ); this.graphics.curveTo( xp, yp + h, xp, yp + h - this._cornerRadius ); this.graphics.lineTo( xp, yp + this._cornerRadius ); this.graphics.curveTo( xp, yp, xp + this._cornerRadius, yp ); this.graphics.endFill(); } else { this.graphics.drawRoundRect( 0, 0, this._defaultWidth, bounds.height + ( this._buffer * 2 ), this._cornerRadius ); } } /* Fade In / Out */ private function animate( show:Boolean ):void { var end:int = show == true ? 1:0; _tween = new Tween(this,"alpha",Strong.easeOut,this.alpha,end,.5,true); if (! show) { _tween.addEventListener( TweenEvent.MOTION_FINISH, onComplete ); //_timer.reset(); } } private function onComplete( event:TweenEvent ):void { event.currentTarget.removeEventListener(event.type, arguments.callee); this.cleanUp(); } /* End Fade */ /** Getters / Setters */ public function set tipWidth( value:Number ):void { this._defaultWidth = value; } public function set titleFormat( tf:TextFormat ):void { this._titleFormat = tf; if (this._titleFormat.font == null) { this._titleFormat.font = "_sans"; } this._titleOverride = true; } public function set contentFormat( tf:TextFormat ):void { this._contentFormat = tf; if (this._contentFormat.font == null) { this._contentFormat.font = "_sans"; } this._contentOverride = true; } public function set align( value:String ):void { var a:String = value.toLowerCase(); var values:String = "right left center"; if (values.indexOf(value) == -1) { throw new Error(this + " : Invalid Align Property, options are: 'right', 'left' & 'center'"); } else { this._align = a; } } /*public function set delay( value:Number ):void { this._delay = value; this._timer.delay = value; }*/ public function set hook( value:Boolean ):void { this._hookEnabled = value; } public function set hookSize( value:Number ):void { this._hookSize = value; } public function set cornerRadius( value:Number ):void { this._cornerRadius = value; } public function set colors( colArray:Array ):void { this._bgColors = colArray; } public function set autoSize( value:Boolean ):void { this._autoSize = value; } /* End Getters / Setters */ /* Cosmetic */ private function textGlow( field:TextField ):void {//对显示对象应用发光效果 var color:Number = 0x000000; var alpha:Number = 0.2; var blurX:Number = 2; var blurY:Number = 2; var strength:Number = 1; var inner:Boolean = false; var knockout:Boolean = false; var quality:Number = BitmapFilterQuality.HIGH; var filter:GlowFilter = new GlowFilter(color, alpha, blurX, blurY, strength, quality, inner, knockout); var myFilters:Array = new Array(); myFilters.push(filter); field.filters = myFilters; } private function bgGlow():void {//对显示对象应用发光效果 var color:Number = 0x000000; var alpha:Number = 0.40; var blurX:Number = 2; var blurY:Number = 2; var strength:Number = 1; var inner:Boolean = false; var knockout:Boolean = false; var quality:Number = BitmapFilterQuality.HIGH; var filter:GlowFilter = new GlowFilter(color, alpha, blurX, blurY, strength, quality, inner, knockout); var myFilters:Array = new Array(); myFilters.push(filter); filters = myFilters; } private function initTitleFormat():void { _titleFormat = new TextFormat(); _titleFormat.font = "_sans"; _titleFormat.bold = true; _titleFormat.size = 16; _titleFormat.color = 0x01430E; } private function initContentFormat():void { _contentFormat = new TextFormat(); _contentFormat.font = "_sans"; _contentFormat.bold = false; _contentFormat.size = 14; _contentFormat.color = 0x000000; } /* End Cosmetic */ /* Helpers */ /* Check if font is a device font */ private function isDeviceFont( format:TextFormat ):Boolean { var font:String = format.font; var device:String = "_sans _serif _typewriter"; return device.indexOf( font ) > -1; //_sans //_serif //_typewriter } private function setOffset():void { switch ( this._align ) { case "left" : this._offSet = - _defaultWidth + ( _buffer * 3 ) + this._hookSize; this._hookOffSet = this._defaultWidth - ( _buffer * 3 ) - this._hookSize; break; case "right" : this._offSet = 0 - ( _buffer * 3 ) - this._hookSize; this._hookOffSet = _buffer * 3 + this._hookSize; break; case "center" : this._offSet = - ( _defaultWidth / 2 ); this._hookOffSet = ( _defaultWidth / 2 ); break; default : this._offSet = - ( _defaultWidth / 2 ); this._hookOffSet = ( _defaultWidth / 2 ); break; } } /* End Helpers */ /* Clean */ private function cleanUp():void { this._parentObject.removeEventListener( MouseEvent.MOUSE_OUT, this.onMouseOut ); this.follow( false ); this._tf.filters = []; this.filters = []; removeChild( this._tf ); this._tf = null; if (this._cf != null) { this._cf.filters = []; removeChild( this._cf ); } this.graphics.clear(); parent.removeChild( this ); } /* End Clean */ }}