代码如下:
复制内容到剪贴板
代码:
package {
import flash.display.*;
import flash.events.*;
import flash.net.URLRequest;
import flash.geom.*;
import flash.filters.*;
/**
* @author CYPL
* 设置图片元件实例名为Image
*/
public class CutImageTest extends Sprite {
private var _imageBitmapData : BitmapData;
private var _imageHotAreaData:BitmapData;
private var _imageBitmap : Bitmap;
private var _mouseRectContainer:Sprite;
private var _mouseRectStartX:Number;
private var _mouseRectStartY:Number;
private var _imageClipDraging:Boolean;
private var _currentDragClip:Sprite;
public function CutImageTest() {
_mouseRectContainer=new Sprite;
Image.visible=false;
_imageBitmapData=new BitmapData(Image.width,Image.height,true,0),_imageBitmapData.draw(Image);
_imageBitmap=Bitmap(addChild(new Bitmap(_imageBitmapData)))
_imageBitmap.x=30
_imageBitmap.y=30
configMouseEvent();
//----------hitTestArea------------------------
var c:ColorTransform=new ColorTransform;
c.color=0xff0000;
_imageHotAreaData=_imageBitmapData.clone();
_imageHotAreaData.draw(_imageHotAreaData,null,c);
}
private function configMouseEvent():void {
stage.addEventListener(MouseEvent.MOUSE_DOWN,mouseDownHandler,false,0,true);
stage.addEventListener(MouseEvent.MOUSE_UP,mouseUpHandler,false,0,true);
}
/**************************drawRect handler*******************************/
private function mouseDownHandler(evt:MouseEvent):void {//mouse_down
if (_imageClipDraging) {
return;
}
addChild(_mouseRectContainer);
_mouseRectStartX=evt.stageX;
_mouseRectStartY=evt.stageY;
stage.addEventListener(MouseEvent.MOUSE_MOVE,mouseMoveHandler);
}
private function mouseUpHandler(evt:MouseEvent):void {//mouse_up
//_currentDragClip&&();
_imageClipDraging&&(_currentDragClip.stopDrag(),_imageClipDraging=false,_currentDragClip.alpha=1)||(cutImage(checkIntersection()),_mouseRectContainer.graphics.clear(),stage.removeEventListener(MouseEvent.MOUSE_MOVE,mouseMoveHandler))
}
private function mouseMoveHandler(evt:MouseEvent):void {//mouse_move
evt.updateAfterEvent();
var minX:Number=Math.min(evt.stageX,_mouseRectStartX)
var minY:Number=Math.min(evt.stageY,_mouseRectStartY)
var maxX:Number=Math.max(evt.stageX,_mouseRectStartX)
var maxY:Number=Math.max(evt.stageY,_mouseRectStartY)
with(_mouseRectContainer.graphics){
clear();
lineStyle(0);
beginFill(0xffff00,.5);
drawRect(0,0,maxX-minX,maxY-minY);}
_mouseRectContainer.x=minX;
_mouseRectContainer.y=minY;
}
/************************************************************************/
/**************************drag handler*******************************/
private function clipMouseDownHandler(evt:MouseEvent):void {//mouse_down
var target:Sprite=evt.target as Sprite;
_currentDragClip=target;
_currentDragClip.alpha=.5;
_imageClipDraging=true;
addChild(target);
_currentDragClip.startDrag(false);
}
/************************************************************************/
private function checkIntersection():Rectangle {
var intersectRect:Rectangle=_imageBitmapData.rect.intersection(new Rectangle(_mouseRectContainer.x-_imageBitmap.x,_mouseRectContainer.y-_imageBitmap.y,_mouseRectContainer.width,_mouseRectContainer.height));
trace("与源图BitmapData相交范围:"+intersectRect);
if (intersectRect.width==0 || intersectRect.height==0) {
return null;
}
var bitmapData:BitmapData=new BitmapData(intersectRect.width,intersectRect.height,true,0);
bitmapData.draw(_imageHotAreaData,new Matrix(1,0,0,1,-intersectRect.x,-intersectRect.y),null,null,new Rectangle(0,0,intersectRect.width,intersectRect.height));
var intersectHotAreaRect:Rectangle=bitmapData.getColorBoundsRect(0xFFFF0000, 0xFFFF0000,true);
trace("最终切图块的范围:"+intersectHotAreaRect);
if (intersectHotAreaRect.width==0 || intersectHotAreaRect.height==0) {
return null;
}
//扩展范围避免误差
intersectHotAreaRect.x-=1
intersectHotAreaRect.y-=1
intersectHotAreaRect.width+=2
intersectHotAreaRect.height+=2
return intersectHotAreaRect;
}
private function cutImage(rect:Rectangle):void {//关键的切图部分
if (!rect) {
return;
}
var clipBitmapData:BitmapData=new BitmapData(rect.width,rect.height,true,0);
var cliptX:Number=(_mouseRectContainer.x=_mouseRectContainer.x<_imageBitmap.x?0:_mouseRectContainer.x-_imageBitmap.x)+rect.x;
var cliptY:Number=(_mouseRectContainer.y=_mouseRectContainer.y<_imageBitmap.y?0:_mouseRectContainer.y-_imageBitmap.y)+rect.y;
clipBitmapData.draw(_imageBitmapData,new Matrix(1,0,0,1,-cliptX,-cliptY),null,null,new Rectangle(0,0,rect.width,rect.height));//intersectHotAreaRect)
var clipBitmap:Bitmap=new Bitmap(clipBitmapData);
clipBitmap.filters=[new GlowFilter(0,1,2,2,10,1)];
var sprite:Sprite=new Sprite
with(sprite.graphics){
lineStyle(0);
lineTo(rect.width,0);
lineTo(rect.width,rect.height);
lineTo(0,rect.height);
lineTo(0,0);}
sprite.x=_mouseRectContainer.x+rect.x+_imageBitmap.x
sprite.y=_mouseRectContainer.y+rect.y+_imageBitmap.y
sprite.addEventListener(MouseEvent.MOUSE_DOWN,clipMouseDownHandler);
Sprite(addChild(sprite)).addChild(clipBitmap)
var fillRect:Rectangle=new Rectangle(sprite.x-_imageBitmap.x,sprite.y-_imageBitmap.y,rect.width,rect.height);
_imageBitmapData.fillRect(fillRect,0);
_imageHotAreaData.fillRect(fillRect,0);
}
}
}
