pb.rar_java 画图板_java画图_pb 画图_图形学_画图 java

import java.applet.*; import java.awt.*; import java.awt.event.*; import java.util.*; import javax.swing.*; import java.awt.geom.*; import java.io.*; class Point implements Serializable { int x,y; Color col; int tool; int boarder; Point(int x, int y, Color col, int tool, int boarder) { this.x = x; this.y = y; this.col = col; this.tool = tool; this.boarder = boarder; } } class paintboard extends Frame implements ActionListener,MouseMotionListener,MouseListener,ItemListener { int x = -1, y = -1; int con = 1;//画笔大小 int Econ = 5;//橡皮大小 int toolFlag = 0;//toolFlag:工具标记 //toolFlag工具对应表： //（0--画笔）；（1--橡皮）；（2--清除）； //（3--直线）；（4--圆）；（5--矩形）； Color c = new Color(0,0,0); //画笔颜色 BasicStroke size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);//画笔粗细 Point cutflag = new Point(-1, -1, c, 6, con);//截断标志 Vector paintInfo = null;//点信息向量组 int n = 1; FileInputStream picIn = null; FileOutputStream picOut = null; ObjectInputStream VIn = null; ObjectOutputStream VOut = null; // *工具面板--画笔，直线，圆，矩形，多边形,橡皮，清除*/ Panel toolPanel; Button eraser, drLine,drCircle,drRect; Button clear ,pen; Choice ColChoice,SizeChoice,EraserChoice; Button colchooser; Label 颜色,大小B,大小E; //保存功能 Button openPic,savePic; FileDialog openPicture,savePicture; paintboard(String s) { super(s); addMouseMotionListener(this); addMouseListener(this); paintInfo = new Vector(); /*各工具按钮及选择项*/ //颜色选择 ColChoice = new Choice(); ColChoice.add("black"); ColChoice.add("red"); ColChoice.add("blue"); ColChoice.add("green"); ColChoice.addItemListener(this); //画笔大小选择 SizeChoice = new Choice(); SizeChoice.add("1"); SizeChoice.add("3"); SizeChoice.add("5"); SizeChoice.add("7"); SizeChoice.add("9"); SizeChoice.addItemListener(this); //橡皮大小选择 EraserChoice = new Choice(); EraserChoice.add("5"); EraserChoice.add("9"); EraserChoice.add("13"); EraserChoice.add("17"); EraserChoice.addItemListener(this); //////////////////////////////////////////////////// toolPanel = new Panel(); clear = new Button("清除"); eraser = new Button("橡皮"); pen = new Button("画笔"); drLine = new Button("画直线"); drCircle = new Button("画圆形"); drRect = new Button("画矩形"); openPic = new Button("打开图画"); savePic = new Button("保存图画"); colchooser = new Button("显示调色板"); //各组件事件监听 clear.addActionListener(this); eraser.addActionListener(this); pen.addActionListener(this); drLine.addActionListener(this); drCircle.addActionListener(this); drRect.addActionListener(this); openPic.addActionListener(this); savePic.addActionListener(this); colchooser.addActionListener(this); 颜色 = new Label("画笔颜色",Label.CENTER); 大小B = new Label("画笔大小",Label.CENTER); 大小E = new Label("橡皮大小",Label.CENTER); //面板添加组件 toolPanel.add(openPic); toolPanel.add(savePic); toolPanel.add(pen); toolPanel.add(drLine); toolPanel.add(drCircle); toolPanel.add(drRect); toolPanel.add(颜色); toolPanel.add(ColChoice); toolPanel.add(大小B); toolPanel.add(SizeChoice); toolPanel.add(colchooser); toolPanel.add(eraser); toolPanel.add(大小E); toolPanel.add(EraserChoice); toolPanel.add(clear); //工具面板到APPLET面板 add(toolPanel,BorderLayout.NORTH); setBounds(60,60,900,600); setVisible(true); validate(); //dialog for save and load openPicture = new FileDialog(this,"打开图画",FileDialog.LOAD); openPicture.setVisible(false); savePicture = new FileDialog(this,"保存图画",FileDialog.SAVE); savePicture.setVisible(false); openPicture.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { openPicture.setVisible(false); } }); savePicture.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { savePicture.setVisible(false); } }); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0);} }); } public void paint(Graphics g) { Graphics2D g2d = (Graphics2D)g; Point p1,p2; n = paintInfo.size(); if(toolFlag==2) g.clearRect(0,0,getSize().width,getSize().height);//清除 for(int i=0; i<n ;i++){ p1 = (Point)paintInfo.elementAt(i); p2 = (Point)paintInfo.elementAt(i+1); size = new BasicStroke(p1.boarder,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL); g2d.setColor(p1.col); g2d.setStroke(size); if(p1.tool==p2.tool) { switch(p1.tool) { case 0://画笔 Line2D line1 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y); g2d.draw(line1); break; case 1://橡皮 g.clearRect(p1.x, p1.y, p1.boarder, p1.boarder); break; case 3://画直线 Line2D line2 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y); g2d.draw(line2); break; case 4://画圆 Ellipse2D ellipse = new Ellipse2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y)); g2d.draw(ellipse); break; case 5://画矩形 Rectangle2D rect = new Rectangle2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y)); g2d.draw(rect); break; case 6://截断，跳过 i=i+1; break; default : }//end switch }//end if }//end for } public void itemStateChanged(ItemEvent e) { if(e.getSource()==ColChoice)//预选颜色 { String name = ColChoice.getSelectedItem(); if(name=="black") {c = new Color(0,0,0); } else if(name=="red") {c = new Color(255,0,0);} else if(name=="green") {c = new Color(0,255,0);} else if(name=="blue") {c = new Color(0,0,255);} } else if(e.getSource()==SizeChoice)//画笔大小 { String selected = SizeChoice.getSelectedItem(); if(selected=="1") { con = 1; size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL); } else if(selected=="3") { con = 3; size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL); } else if(selected=="5") {con = 5; size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL); } else if(selected=="7") {con = 7; size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL); } else if(selected=="9") {con = 9; size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL); } } else if(e.getSource()==EraserChoice)//橡皮大小 { String Esize = EraserChoice.getSelectedItem(); if(Esize=="5") { Econ = 5*2; } else if(Esize=="9") { Econ = 9*2; } else if(Esize=="13") { Econ = 13*2; } else if(Esize=="17") { Econ = 17*3; } } } public void mouseDragged(MouseEvent e) { Point p1 ; switch(toolFlag){ case 0://画笔 x = (int)e.getX(); y = (int)e.getY(); p1 = new Point(x, y, c, toolFlag, con); paintInfo.addElement(p1); repaint(); break; case 1://橡皮 x = (int)e.getX(); y = (int)e.getY(); p1 = new Point(x, y, null, toolFlag, Econ); paintInfo.addElement(p1); repaint(); break; default : } } public void mouseMoved(MouseEvent e) {} public void update(Graphics g) { paint(g); } public void mousePressed(MouseEvent e) { Point p2; switch(toolFlag){ case 3://直线 x = (int)e.getX(); y = (int)e.getY(); p2 = new Point(x, y, c, toolFlag, con); paintInfo.addElement(p2); break; case 4: //圆 x = (int)e.getX(); y = (int)e.getY(); p2 = new Point(x, y, c, toolFlag, con); paintInfo.addElement(p2); break; case 5: //矩形 x = (int)e.getX(); y = (int)e.getY(); p2 = new Point(x, y, c, toolFlag, con); paintInfo.addElement(p2); break; default : } } public void mouseReleased(MouseEvent e) { Point p3; switch(toolFlag){ case 0://画笔 paintInfo.addElement(cutflag); break; case 1: //eraser paintInfo.addElement(cutflag); break; case 3://直线 x = (int)e.getX(); y = (int)e.getY(); p3 =