java课程设计 图片查看器

22oripicbtn.setEnabled(true);//line8，将图片顺时针旋转publicvoidangleright(){isangled=true;radius+=Math.PI/2;//设置每次右旋45度角repaint();oripicbtn.setEnabled(true);}//图片删除publicvoiddelete(){Filef=newFile(path+"\\"+pics[i]);if(f.exists())f.delete();else{pathInfo.setForeground(Color.BLACK);pathlnfo.setText(“文件不存在")；}for(intj=i；j<pics.length-1；j++)pics[j]=pics[j+1]；if(i==pics.length-1)i=0；dir=path+"\\"+pics[i]；loadImage(dir)；}//line9，退出图片查看器publicvoidexit(){hasPic=false；System.exit(1)；//linelO,加载图像publicvoidloadImage(StringfileName){pic=this.getToolkit().getImage(fileName);//取得图像MediaTrackermt=newMediaTracker(this);//实例化媒体加载器,跟踪多种媒体对象状态mt.addImage(pic,O);//增加图像到加载器中picWidth=pic.getWidth(this);picHeight=pic.getHeight(this);try{mt.waitForAll();//等待图片加载}catch(Exceptione){e.printStackTrace();//输出出错信息}oriBufImage=newBufferedImage(pic.getWidth(this),pic.getHeight(this),BufferedImage.TYPE_INT_ARGB);//创建原始缓冲区图像bufImage=oriBufImage;buflmageG=buflmage.createGraphics();//创建bufImage的图形环境bufImageG.drawImage(pic,O,O,this);//传输源图像数据到缓冲区图像中repaint();//重绘组件}//line11,图像转换处理publicvoidpicTrans(){if(bufImage==null)return;//如果bufImage为空则直接返回BufferedImagefilteredBufImage=newBufferedImage((int)(pic.getWidth(this)*scaleX),(int)(pic.getHeight(this)*scaleY),BufferedImage.TYPE_INT_ARGB);//过滤后的图像AffineTransformtransform=newAffineTransform();//2D仿射变换transform.setToScale(scaleX,scaleY);//设置仿射变换的比例因子AffineTransformOpimageOp=newAffineTransformOp(transform,null);//创建仿射变换操作对象imageOp.filter(oriBufImage,filteredBufImage);//过滤图像,目标图像在filteredBuflmagebufImage=filteredBufImage;//让用于显示的缓冲区图像指向过滤后的图像}//重写update()，消除闪烁publicvoidupdate(Graphicsg){this.paint(g);}//linel2,图片绘制publicvoidpaint(Graphicsg){intpanelWidth=this.getWidth();intpanelHeight=this.getHeight();super.paint(g);//判断是否需要旋转图片if(bufImage!=null&&isangled==true){Graphics2Dg2=(Graphics2D)g;AffineTransformtx=newAffineTransform();//按照角度,根据中心旋转tx.rotate(radius,panelWidth/2,panelHeight/2);g2.setTransform(tx);picTrans();g2.drawImage(bufImage,(panelWidth-bufImage.getWidth())/2,(panelHeight-bufImage.getHeight())/2,this);//绘制图片pathInfo.setForeground(Color.BLACK);pathInfo.setText(path+"\\"+filename);isangled=false;}elseif(bufImage!=null){Graphics2Dg2=(Graphics2D)g;picTrans();g2.drawImage(bufImage,(panelWidth-bufImage.getWidth())/2,(panelHeight-bufImage.getHeight())/2,this);//绘制图片}}//linel3,文件类型过滤publicclassFilterimplementsFilenameFilter{Stringextension;Filter(Stringextension){this.extension=