flash Tooltip类
http://www.flepstudio.com/flash/actionscript3/documentation/html/com_flepstudio_text_ToolTip.html
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);
}
}
}