源代码 Java源码 java画图板

import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; import java.io.*; import java.awt.geom.*; import java.util.*; import java.net.*; public class ShapeTalk { //frame JFrame frame; //menu and other of the frame JMenuBar menuBar; JMenu file, edit, color, help; JMenuItem newImage, open, save, saveas, quit, questions, about, colorChooser; JMenuItem buttonReturn, buttonResume, buttonClear, buttonCopy; DrawPanel centerCenter, unDoPanel; JPanel centerPanel, mainPanel; ButtonGroup tool, drawChange, selectChange; JRadioButton scale, rotate, shear, translation; JToggleButton curve, ellipse, eraser, fill, line, pencil, rectangle, roundrectangle, word, mouse, straw; Icon curveI, ellipseI, eraserI, fillI, lineI, pencilI, rectangleI, roundrectangleI, wordI, mouseI, strawI; JRadioButton drawButton, fillButton, changeButton; JLabel sizeXText, sizeYText, posXText, posYText, degreeText; JColorChooser colorSet; JToolBar imageTool; JSlider thickness; Graphics2D graphic; int state = 0; //store the graphic shape now Color colorChosen; //store the graphic color now Vector<Shape> store; //to store the position of the shape int x0, y0, x, y; int connected = 0; //to draw by a pencil GeneralPath gPath; //GeneralPath对象实例 Point aPoint; //store the number of selected object int selectedObject = -1; int selectedObjectCopy = 0; //transform matrix of these shape AffineTransform changeMatrix; AffineTransform returnMatrix; //class talk class Talk extends JPanel { //frame of talk JPanel panel, bottomPanel, bottomRight, upperPanel, upper1, upper2, upper3; JTextArea talkArea; JTextField talkInput, serverIP, serverPort, myName; JButton buttonSend, buttonSave, connectServer, disconnectServer; JLabel serverIPLabel, serverPortLabel, myNameLabel; //client java.awt.List list1 = new java.awt.List(99); //Show the users online Socket socket=null; //connect to the port ObjectOutputStream ps=null; //output stream ObjectInputStream iss = null; Listen listen=null; //listen the thread JScrollPane scollPane; String name; //function talk Talk() { //store the basic information of the client name = new String(); setLayout(new BorderLayout()); talkArea = new JTextArea(2, 2); talkArea.setEditable(false); scollPane = new JScrollPane(talkArea); bottomPanel = new JPanel(new BorderLayout()); upperPanel = new JPanel(new GridLayout(2,1)); add(scollPane, BorderLayout.CENTER); add(bottomPanel, BorderLayout.SOUTH); add(upperPanel, BorderLayout.NORTH); //the frame of the talk part upper1 = new JPanel(); upper2 = new JPanel(); upperPanel.add(upper1); upperPanel.add(upper2); serverIPLabel = new JLabel("ServerIP:"); serverPortLabel = new JLabel("ServerPort:"); myNameLabel = new JLabel("My Name:"); serverIP = new JTextField("127.0.0.1", 17); serverPort = new JTextField("5652", 6); myName = new JTextField("Client", 12); connectServer = new JButton("Connect"); disconnectServer = new JButton("Disonnect"); disconnectServer.setEnabled(false); upper1.add(serverIPLabel); upper1.add(serverIP); upper1.add(serverPortLabel); upper1.add(serverPort); upper1.add(myNameLabel); upper1.add(myName); upper2.add(connectServer); upper2.add(disconnectServer); talkInput = new JTextField(); bottomRight = new JPanel(new GridLayout(1, 2)); bottomPanel.add(talkInput, BorderLayout.CENTER); bottomPanel.add(bottomRight, BorderLayout.EAST); buttonSend = new JButton("Send"); buttonSave = new JButton("Save"); bottomRight.add(buttonSend); bottomRight.add(buttonSave); /**the actionlistener for textfield and send button*/ class AddTalk implements ActionListener { public void actionPerformed(ActionEvent event) { if(socket!=null) //if there is a socket, send information { StringBuffer msg = new StringBuffer("MSG: "); msg.append(name); msg.append(":"); msg.append(talkInput.getText()); ImageInfo o = new ImageInfo(msg); try{ ps.writeObject(o); //output the information ps.flush(); }catch(IOException ex){ ex.printStackTrace(); //out put errors } talkInput.setText(""); //clear the textfield } } } //add the listerner to these buttons talkInput.addActionListener(new AddTalk()); buttonSend.addActionListener(new AddTalk()); /**the actionlisterner of buttonsave*/ buttonSave.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ev) { JFileChooser saveFile = new JFileChooser(); File currentFile = new File("."); saveFile.setCurrentDirectory(currentFile); //FileNameExtensionFilter saveFileFilter = new FileNameExtensionFilter("*.txt", "txt"); //saveFile.setFileFilter(saveFileFilter); saveFile.setApproveButtonText("Save"); int selected = saveFile.showSaveDialog(null); if (selected == JFileChooser.APPROVE_OPTION) { File file= saveFile.getSelectedFile(); if(file.exists() == true) { //JOptionPane confirm = new JOptionPane(); int change = JOptionPane.showConfirmDialog(null, "Do you confirm to change "+file.getName()+"?", "confirm", JOptionPane.YES_NO_OPTION); if(change != JOptionPane.OK_OPTION) { return; } } try{ FileOutputStream of = new FileOutputStream(file); OutputStreamWriter os = new OutputStreamWriter(of); os.write(talkArea.getText()); os.close(); of.close(); }catch(FileNotFoundException ex){ //JOptionPane writeError = new JOptionPane(); JOptionPane.showMessageDialog(null, "Cannot open the file!", "error", JOptionPane.INFORMATION_MESSAGE); }catch(IOException ex){ //JOptionPane writeError = new JOptionPane(); JOptionPane.showMessageDialog(null, "Writing to file error!", "error", JOptionPane.INFORMATION_MESSAGE); } } } });//end of buttonSave.addActionListener /**the actionlisterner of connectserver*/ connectServer.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent ev) { name = myName.getText(); try{ if (socket == null) { InetAddress ip; int port; try{ ip = InetAddress.getByName(serverIP.getText()); port = (int)Integer.parseInt(serverPort.getText()); socket = new Socket(ip, port); //实例化一个套接字 }catch(NumberFormatException e) { JOptionPane.showMessageDialog(null, "Format of IP or Port Error", "Error", JOptionPane.ERROR_MESSAGE); } ps=new ObjectOutputStream(socket.getOutputStream()); //获取输出流 iss=new ObjectInputStream(socket.getInputStream()); StringBuffer info = new StringBuffer("INFO: "); String userinfo = name+":"+InetAddress.getLocalHost().toString(); info.append(userinfo); ps.writeObject(new ImageInfo(info)); //输出信息 ps.flush(); listen = new Listen(name,socket); //实例化监听线程 listen.start(); //启动线程 } talkArea.append("Connect to " + serverIP.getText() +":" + serverPort.getText() + " succeed!\n"); connectServer.setEnabled(false); disconnectServer.setEnabled(true); connected = 1; }catch (Exception ex){ ex.printStackTrace(); //输出错误信息 talkArea.append("Connect to " + serverIP.getText() +":" + serverPort.getText() + " failed!\n"