flash Tooltip类

package com.flepstudio.text
{
????import flash.display.*;
????import flash.events.*;
????import flash.text.*;
?????
????/**
?????* ToolTip is a ValueObject for the FlepStudio API.
?????* This class produces a tooltip advice on mouse rollover
?????*
?????* @author Filippo Lughi
?????* @version Actionscript 3.0
?????*/
????public class ToolTip extends MovieClip
????{
????????private var _bg_color:uint;
????????private var _text_color:uint;
????????private var _text_size:int;
????????private var _font:String;
????????private var _tool_text:String;
????????private var _field_txt:TextField;
????????private var _alpha_color:Number;
?????????
????????private var ratio:int=10;
????????private var holder_mc:MovieClip;
????????private var bg_mc:MovieClip;
????????private var father:MovieClip;
?????????
????????/**
?????????* Construct a new ToolTip instance
?????????*
?????????* @param??????? .bc??????? uint???????? -- background color
?????????* @param??????? .tc??????????? uint???????? -- text color
?????????* @param??????? .ts??????????? int??????????? -- text size
?????????* @param??????? .f??????????? String??????? -- the font to use
?????????* @param??????? .tt??????????? String??????? -- text of the tooltip
?????????* @param??????? .n??????????? Number???? -- alpha of background color
?????????*/
????????public function ToolTip(bc:uint,tc:uint,ts:int,f:String,tt:String,n:Number)
????????{
????????????bg_color=bc;
????????????text_color=tc;
????????????text_size=ts;
????????????font=f;
????????????tool_text=tt;
????????????alpha_color=n;
?????????????
????????????addEventListener(Event.ADDED_TO_STAGE,init);
?????????????
????????????mouseEnabled=false;
????????????alpha=0;
????????}
?????????
????????/**
?????????* Background color
?????????*/
????????public function get bg_color():uint
????????{
????????????return _bg_color;
????????}
?????????
????????public function set bg_color(c:uint):void
????????{
????????????_bg_color=c;
????????}
?????????
????????/**
?????????* Text color
?????????*/
????????public function get text_color():uint
????????{
????????????return _text_color;
????????}
?????????
????????public function set text_color(c:uint):void
????????{
????????????_text_color=c;
????????}
?????????
????????/**
?????????* Text size
?????????*/
????????public function get text_size():int
????????{
????????????return _text_size;
????????}
?????????
????????public function set text_size(n:int):void
????????{
????????????_text_size=n;
????????}
?????????
????????/**
?????????* The font
?????????*/
????????public function get font():String
????????{
????????????return _font;
????????}
?????????
????????public function set font(s:String):void
????????{
????????????_font=s;
????????}
?????????
????????/**
?????????* The text
?????????*/
????????public function get tool_text():String
????????{
????????????return _tool_text;
????????}
?????????
????????public function set tool_text(s:String):void
????????{
????????????_tool_text=s;
????????}
?????????
????????/**
?????????* The text
?????????*/
????????public function get field_txt():TextField
????????{
????????????return _field_txt;
????????}
?????????
????????public function set field_txt(t:TextField):void
????????{
????????????_field_txt=t;
????????}
?????????
????????/**
?????????* The alpha color
?????????*/
????????public function get alpha_color():Number
????????{
????????????return _alpha_color;
????????}
?????????
????????public function set alpha_color(n:Number):void
????????{
????????????_alpha_color=n;
????????}
?????????
????????/**
?????????* Init the class
?????????*
?????????* @param??????? .evt??????????????? Event
?????????*/
????????private function init(evt:Event):void
????????{
????????????removeEventListener(Event.ADDED_TO_STAGE,init);
?????????????
????????????father=parent as MovieClip;
?????????????
????????????createHolder();
????????????createTextField();
????????????createBackground();
????????????fixPosition();
????????????fadeIn();
????????????addEventListener(Event.ENTER_FRAME,addMovement);
????????}
?????????
????????/**
?????????* Container MovieClip creation
?????????*
?????????*/
????????private function createHolder():void
????????{
????????????holder_mc=new MovieClip();
????????????addChild(holder_mc);
????????}
?????????
????????/**
?????????* TextField tooltip creation
?????????*
?????????*/
????????private function createTextField():void
????????{
????????????field_txt=new TextField();
????????????field_txt.multiline=true;
????????????field_txt.selectable=false;
????????????field_txt.embedFonts=true;
????????????field_txt.antiAliasType=AntiAliasType.ADVANCED;
????????????field_txt.autoSize=TextFieldAutoSize.LEFT;
????????????field_txt.defaultTextFormat=getFormat();
????????????field_txt.htmlText=tool_text+"? ";
????????????field_txt.width=field_txt.textWidth+10;
????????????field_txt.height=field_txt.textHeight+20;
????????????holder_mc.addChild(field_txt);
????????}
?????????
????????/**
?????????* Get a text format
?????????*
?????????* @return??????????????????????????????? TextFormat??????????????? the textfield's format of tooltip
?????????*/
????????private function getFormat():TextFormat
????????{
????????????var format:TextFormat=new TextFormat();
????????????format.font=font;
????????????format.size=text_size;
????????????format.color=text_color;
????????????return format;
????????}
?????????
????????/**
?????????* Background MovieClip creation
?????????*
?????????*/
????????private function createBackground():void
????????{
????????????bg_mc=new MovieClip();
????????????bg_mc.graphics.beginFill(bg_color,alpha_color);
????????????bg_mc.graphics.drawRoundRect(-ratio,-ratio,field_txt.width+ratio*2,field_txt.height+ratio*2,ratio,ratio);
????????????holder_mc.addChild(bg_mc);
?????????????
????????????holder_mc.swapChildren(field_txt,bg_mc);
????????}
?????????
????????/**
?????????* Position the tooltip
?????????*
?????????*/
????????private function fixPosition():void
????????{
????????????if(father.mouseX? <? stage.stageWidth/2)
????????????????x=father.mouseX;
????????????else
????????????????x=father.mouseX-width;
????????????if(father.mouseY? <? stage.stageHeight/2)
????????????????y=father.mouseY+height-ratio*2;
????????????else
????????????????y=father.mouseY-height;
????????}
?????????
????????/**
?????????* Init fade-in section of tooltip
?????????*
?????????*/
????????private function fadeIn():void
????????{
????????????bg_mc.addEventListener(Event.ENTER_FRAME,fadeInToolTip);
????????}
?????????
????????/**
?????????* Fade-in of tooltip
?????????*
?????????* @param??????? .evt??????????????? Event
?????????*/
????????private function fadeInToolTip(evt:Event):void
????????{
????????????var distance:Number=1-alpha;
????????????var inertial:Number=distance*.2;
????????????alpha+=inertial;
????????????if(Math.abs(distance)? <= .1)
????????????{
????????????????alpha=1;
????????????????bg_mc.removeEventListener(Event.ENTER_FRAME,fadeInToolTip);
????????????}
????????}
?????????
????????/**
?????????* Movement of tooltip
?????????*
?????????* @param??????? .evt??????????????? Event
?????????*/
????????private function addMovement(evt:Event):void
????????{
????????????if(father.mouseX? <? stage.stageWidth/2)
????????????????x=father.mouseX;
????????????else
????????????????x=father.mouseX-width+ratio*2;
????????????if(father.mouseY? <? stage.stageHeight/2)
????????????????y=father.mouseY+height-ratio*2;
????????????else
????????????????y=father.mouseY-height;
?????????????????
????????????if(x? >? stage.stageWidth-width)
????????????????x=stage.stageWidth-width;
????????????if(x? <? ratio*2)
????????????????x=ratio*2;
????????}
?????????
????????/**
?????????* Remove this instance
?????????*
?????????*/
????????public function destroy():void
????????{
????????????removeEventListener(Event.ENTER_FRAME,addMovement);
????????????bg_mc.removeEventListener(Event.ENTER_FRAME,fadeInToolTip);
????????????father.removeChild(this);
????????}
????}
}