在 .swf 对象中，我使用 eventRotateHit 函数沿一个方向旋转图片：顺时针 (+90°)。有用！
我需要创建一个逆时针（-90°）函数：eventRotateHit2。此功能不起作用：图片消失。我认为这是因为旋转中心是错误的，但我不确定。而且我不知道如何改变它。
你能帮我吗？
弗雷德里克
我的代码：
package Classes.image
{
import fl.controls.Button;
import flash.display.Bitmap;
import flash.display.MovieClip;
import Classes.utils.*;
import Classes.*;
import flash.events.*;
import flash.text.TextField;
import flash.text.StyleSheet;
import flash.utils.ByteArray;
import flash.display.BitmapData;
import com.adobe.images.JPGEncoder;
public class imgBox extends MovieClip
{
public var _img : imgHelper;
private var _MAX_WIDTH : Number;
private var _MAX_HEIGHT : Number;
private var boxFrame:MovieClip;
private var statusMsg:TextField;
public var byteData:ByteArray;
public function imgBox(w:Number,h:Number,_bitmap:Bitmap)
{
_MAX_WIDTH = w;
_MAX_HEIGHT = h;
var borderColor:uint = 0x666666;
var borderSize:uint = 1;
var vMenu:verticalMenu;
_img = new imgHelper(_bitmap);
_img.addEventListener("invalidate", eventImageInvalidated);
if ( _bitmap.width > _MAX_WIDTH || _bitmap.height > _MAX_HEIGHT )
_img.resizePic(_MAX_WIDTH, _MAX_HEIGHT, false);
boxFrame = new MovieClip;
boxFrame.graphics.lineStyle(borderSize, borderColor);
boxFrame.graphics.drawRect(0, 0, _img.width+4,_img.height+4);
addChild(boxFrame);
addChild(_img);
boxFrame.x = 60 + _img.theImage.x;
boxFrame.y = _img.theImage.y;
_img.x = 62;
_img.y = 2;
//vMenu = new verticalMenu();
//var myMenu:Array = new Array( { label:'Rotate', _function:eventRotateHit } );// ,
// { label:'Upload', _function:eventUploadHit } );
//vMenu.buildMenu(myMenu);
var button:Button = new Button();
button.label = Local.getInstance().getString("rotate");
button.width = 50;
button.addEventListener(MouseEvent.CLICK, eventRotateHit);
addChild(button);
var buttonbis:Button = new Button();
buttonbis.label = Local.getInstance().getString("rotate");
buttonbis.width = 50;
buttonbis.y = 50;
buttonbis.addEventListener(MouseEvent.CLICK, eventRotateHit2);
addChild(buttonbis);
}
private function eventImageInvalidated(e:Event) {
e.stopImmediatePropagation();
dispatchEvent(new Event("invalidate", true, true));// invalidate for re-encoding the image.
}
private function eventUploadHit(e:*) {
trace('Upload Hit');
this.dispatchEvent(new Event("uploadImage"));
}
public function showStatus(msg:String) {
TweenLite.to(boxFrame, 0.5, { height: _img.height + 24 } );
var vMenu:verticalMenu = new verticalMenu();;
if (statusMsg){
removeChild(statusMsg);
statusMsg = null;
}
statusMsg = new TextField();
statusMsg.htmlText = msg;
statusMsg.styleSheet = vMenu._textStyleSheet;
statusMsg.width = _img.width;
addChild(statusMsg);
statusMsg.y = _img.height + 2;
statusMsg.x = boxFrame.x + 10;
}
public function hideStatus(msg:String = "") {
if (statusMsg){
removeChild(statusMsg);
statusMsg = null;
}
TweenLite.to(boxFrame, 0.5, { height: _img.height + 4 } );
}
private function eventRotateHit(e:*) {
trace('rotate Image');
if (statusMsg){
removeChild(statusMsg);
statusMsg = null;
}
_img.rotate(Math.PI / 2);
_img.resizePic(_MAX_WIDTH, _MAX_HEIGHT, false);
boxFrame.width = _img.width + 4;
boxFrame.height = _img.height + 4;
boxFrame.x = 60 + _img.theImage.x;
boxFrame.y = _img.theImage.y;
}
private function eventRotateHit2(e:*) {
trace('rotate Image');
if (statusMsg){
removeChild(statusMsg);
statusMsg = null;
}
_img.rotate((-1)*Math.PI/2);
_img.resizePic(_MAX_WIDTH, _MAX_HEIGHT, false);
boxFrame.width = _img.width + 4;
boxFrame.height = _img.height + 4;
boxFrame.x = 60 + _img.theImage.x;
boxFrame.y = _img.theImage.y;
}
public function dispose() {
}
public function prepare(w:Number, h:Number, q:Number) {
var btData:BitmapData = _img.resizeBitmapData(w, h);
byteData = new JPGEncoder(q).encode(btData);
}
}
}
这里是旋转功能：
package Classes.utils
{
import flash.display.Bitmap;
import flash.display.DisplayObject;
import flash.display.MovieClip;
import flash.net.*;
import flash.display.Loader;
import flash.events.*;
import flash.system.LoaderContext;
import flash.text.TextField;
import flash.geom.ColorTransform;
import flash.geom.Matrix;
import flash.display.BitmapData;
import Classes.*;
import flash.utils.ByteArray;
public class imgHelper extends MovieClip
{
public var tt:TextField;
public var theImage:Bitmap;
private var myMask:MovieClip;
private var _boxDimW:Number;
private var _boxDimH:Number;
public function imgHelper(img:Bitmap=null)
{
theImage = img;
if (theImage)
addChild(theImage);
tt = new TextField;
tt.text = '0%';
/* addChild(tt);*/
}
public override function get width():Number {
return theImage.width;
}
public override function get height():Number {
return theImage.height;
}
public function get _scaleX():Number {
return theImage.scaleX;
}
public function set _scaleX(sx) {
theImage.scaleX = sx;
}
public function get _scaleY():Number {
return theImage.scaleY;
}
public function set _scaleY(sy:Number) {
theImage.scaleY = sy;
}
public function load(url:String)
{
//trace('loading : ' + url);
var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, picLoaded);
loader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, errLoading);
loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, progress);
var lContext:LoaderContext = new LoaderContext(true);
var request:URLRequest = new URLRequest(url);
try {
loader.load(request,lContext);
} catch (error:Error) {
trace("Unable to load requested document.");
}
}
private function progress(e:ProgressEvent)
{
tt.text = Math.round(e.bytesLoaded /e.bytesTotal *100) + '%';
}
private function errLoading(e:*)
{
tt.visible = false;
dispatchEvent(new Event("imgLoaded",true,true));
}
private function picLoaded(e:*)
{
var picLoader:Loader = Loader(e.target.loader);
theImage = Bitmap(picLoader.content);
addChild(theImage);
tt.visible = false;
dispatchEvent(new Event("imgLoaded",true,true));
}
public function resizePic(rW:Number,rH:Number,crop:Boolean=false)
{
var img = theImage;
_boxDimW = rW;
_boxDimH = rH;
if (img.width > img.height)
{
img.width = rW;
img.height = img.height * img.scaleX;
}
else
{
img.height = rH;
img.width = img.width * img.scaleY;
}
if (crop)
{
if (img.width < img.height)
{
var oldScaleX = img.scaleX;
img.width = rW;
img.scaleY += img.scaleX-oldScaleX;
}
else
{
var oldScaleY = img.scaleY;
img.height = rH;
img.scaleX += img.scaleY-oldScaleY;
}
maskIt(rW, rH);
}
else {
if (img.height < img.width) {
img.y=(rH-img.height)/2
}
else {
img.x=(rW-img.width)/2
}
}
}
public function resizeBitmapData (rW:Number, rH:Number):BitmapData {
var img:Bitmap = new Bitmap(theImage.bitmapData);
trace('resize bitmap : ' + img.height + '-' + img.width);
trace('resize bitmap : ' + rH + '-' + rW);
if (img.width > img.height) {
if (img.height>rH)
rH = img.height * (rW / img.width);
else{ // do not resize
rH = img.height;
rW = img.width;
}
}
else {
if (img.width>rW)
rW = img.width * (rH / img.height);
else{ // do not resize
rH = img.height;
rW = img.width;
}
}
var bmpData:BitmapData = new BitmapData(rW, rH);
var scaleMatrix:Matrix = new Matrix( rW / img.width , 0, 0, rH / img.height , 0,0);
var colorTransform:ColorTransform = new ColorTransform();
bmpData.draw(theImage, scaleMatrix , colorTransform, null, null, true);
return (bmpData);
}
public function rotate(dir:Number) {
var workingImage:Bitmap = new Bitmap(theImage.bitmapData.clone());
var bmpData:BitmapData = new BitmapData(workingImage.height, workingImage.width);
var transMatrix:Matrix = new Matrix(Math.cos(dir),Math.sin(dir),-Math.sin(dir),Math.cos(dir), workingImage.height,0);
var colorTransform:ColorTransform = new ColorTransform();
bmpData.draw(workingImage, transMatrix, colorTransform, null, null, true);
TweenLite.to(theImage, 0.5, { autoAlpha:0 } );
//removeChild(theImage);
theImage = new Bitmap(bmpData);
addChild(theImage);
//trace(theImage.y + '--' + theImage.x+'--'+theImage.height+'--'+theImage.width);
if (theImage.height < theImage.width) {
theImage.y += (_boxDimH - theImage.height) / 2
}
else {
theImage.x +=(_boxDimW-theImage.width)/2
}
theImage.alpha = 0;
TweenLite.to(theImage, 1, { autoAlpha:1 } );
trace('sending event !');
dispatchEvent(new Event("invalidate", true, true));// invalidate for re-encoding the image.
}
public function maskIt(w:Number, h:Number)
{
if (myMask) {
removeChild(myMask);
myMask = null;
}
myMask = new MovieClip();
myMask.graphics.beginFill(0xFFCC00);
myMask.graphics.drawRect(0, 0, w,h);
addChild(myMask);
this.mask = myMask;
}
public function dispose() {
}
}
}
谢谢大家！！！