关于AIR多点触控开发<基础篇>

目录：

关于flash多点触控开发<基础篇>

关于flash多点触控开发-交通 <案例篇>

此专题目的：开发支持多点触控的地图案例。仅仅作为进度笔记

import flash.events.TransformGestureEvent;
 
import flash.events.TouchEvent;
import flash.text.TextField;
 
 
var pointA_id:Number=0;
var pointB_id:Number=0;
 
addEventListener(TouchEvent.TOUCH_BEGIN, onTouchBegin);
addEventListener(TouchEvent.TOUCH_END, onTouchEnd);
addEventListener(TouchEvent.TOUCH_MOVE, onTouchMove);
 
addEventListener(TransformGestureEvent.GESTURE_ROTATE,onRotate)
addEventListener(TransformGestureEvent.GESTURE_ZOOM,onZoom)
addEventListener(TransformGestureEvent.GESTURE_PAN,onPan)
addEventListener(TransformGestureEvent.GESTURE_SWIPE,onSwipe)
 
 
function onRotate(e:TransformGestureEvent):void{
 _txt.text="rotate:"+e.rotation
 container.rotation+=e.rotation
  
}
 
function onZoom(e:TransformGestureEvent):void{
 _txt.text="scaleX:"+e.scaleX+"\n"+"scaleY:"+e.scaleY;
 if(e.scaleX==0 && e.scaleY==0)return;
  
 var scale:Number=(e.scaleX>=e.scaleY) ? e.scaleX : e.scaleY;
 scale=fixNumber(scale)
  
 var minS:Number=0.2;
 var maxS:Number=1;
  
 var tempScale=fixNumber(container.photo_mc.scaleX)*scale;
 tempScale=fixNumber(tempScale)
  
 if(tempScale<minS) tempScale=minS;
 if(tempScale>maxS) tempScale=maxS;
  
 container.photo_mc.scaleX=container.photo_mc.scaleY=tempScale;
  
}
 
function onPan(e:TransformGestureEvent):void{
 _txt.text="offsetX:"+e.offsetX+"\n"+"offsetY:"+e.offsetY;
 container.x+=e.offsetX;
 container.y+=e.offsetY;
}
 
function onSwipe(e:TransformGestureEvent):void{
 //trace("SWIPE")
}
 
function onTouchBegin(e:TouchEvent):void{
  
 if(pointA_id==0){
  pointA_id=e.touchPointID
  updatePointInfo(e.touchPointID,e.stageX,e.stageY,a_txt)
 }else{
  pointB_id=e.touchPointID
  updatePointInfo(e.touchPointID,e.stageX,e.stageY,b_txt)
 }
}
 
function onTouchMove(e:TouchEvent):void{
 if(pointA_id==e.touchPointID){
  updatePointInfo(e.touchPointID,e.stageX,e.stageY,a_txt)
 }else{
  updatePointInfo(e.touchPointID,e.stageX,e.stageY,b_txt)
 }
  
}
function onTouchEnd(e:TouchEvent):void{
 if(pointA_id==e.touchPointID){
  pointA_id=0;
  clearPointInfo(a_txt)
 }else{
  pointB_id=0
  clearPointInfo(b_txt)
 }
  
}
 
function updatePointInfo(id:Number,x:Number,y:Number,_txt:TextField):void{
 var str:String="";
 str="PointID: "+id+"\n";
 str+="X: "+x+"\n";
 str+="Y: "+y;
 _txt.text=str;
}
 
function clearPointInfo(_txt:TextField):void{
 _txt.text="PointID: --\n"+"X: --\n"+"Y: --";
}
function fixNumber(n:Number):Number{
 return int(n*100)/100;
}