java 绘图板 java源代码

package minidrawpad; import java.awt.*; import java.awt.event.*; import java.io.InputStreamReader; import java.io.Reader; import javax.swing.*; // 主界面类 public class DrawPad extends JFrame implements ActionListener { /** * @param FileName DrawPad * @author Liu Jun Guang s * @param V 1.0.0 */ private static final long serialVersionUID = -2551980583852173918L; private JToolBar buttonpanel;//定义按钮面板 private JMenuBar bar ;//定义菜单条 private JMenu file,color,stroke,help;//定义菜单 private JMenuItem newfile,openfile,savefile,exit;//file 菜单中的菜单项 private JMenuItem helpin,helpmain,colorchoice,strokeitem;//help 菜单中的菜单项 private Icon nf,sf,of;//文件菜单项的图标对象 private JLabel startbar;//状态栏 private DrawArea drawarea;//画布类的定义 private Help helpobject; //定义一个帮助类对象 private FileClass fileclass ;//文件对象 String[] fontName; //定义工具栏图标的名称 private String names[] = {"newfile","openfile","savefile","pen","line" ,"rect","frect","oval","foval","circle","fcircle" ,"roundrect","froundrect","rubber","color" ,"stroke","word"};//定义工具栏图标的名称 private Icon icons[];//定义图象数组 private String tiptext[] = {//这里是鼠标移到相应的按钮上给出相应的提示 "新建一个图片","打开图片","保存图片","随笔画","画直线" ,"画空心的矩形","填充矩形","画空心的椭圆","填充椭圆" ,"画空心的圆","填充圆","画圆角矩形","填充圆角矩形" ,"橡皮擦","颜色","选择线条的粗细","文字的输入"}; JButton button[];//定义工具条中的按钮组 private JCheckBox bold,italic;//工具条字体的风格（复选框） private JComboBox stytles ;//工具条中的字体的样式（下拉列表） public DrawPad(String string) { // TODO 主界面的构造函数 super(string); //菜单的初始化 file = new JMenu("文件"); color = new JMenu("颜色"); stroke = new JMenu("画笔"); help = new JMenu("帮助"); bar = new JMenuBar();//菜单条的初始化 //菜单条添加菜单 bar.add(file); bar.add(color); bar.add(stroke); bar.add(help); //界面中添加菜单条 setJMenuBar(bar); //菜单中添加快捷键 file.setMnemonic('F');//既是ALT+“F” color.setMnemonic('C');//既是ALT+“C” stroke.setMnemonic('S');//既是ALT+“S” help.setMnemonic('H');//既是ALT+“H” //File 菜单项的初始化 try { Reader reader = new InputStreamReader(getClass().getResourceAsStream("/icon"));//读取文件以类路径为基准 } catch (Exception e) { // TODO 文件读取错误 JOptionPane.showMessageDialog(this,"图片读取错误！","错误",JOptionPane.ERROR_MESSAGE); } nf = new ImageIcon(getClass().getResource("/icon/newfile.jpg"));//创建图表 sf = new ImageIcon(getClass().getResource("/icon/savefile.jpg")); of = new ImageIcon(getClass().getResource("/icon/openfile.jpg")); newfile = new JMenuItem("新建",nf); openfile = new JMenuItem("打开",of ); savefile = new JMenuItem("保存",sf); exit = new JMenuItem("退出"); //File 菜单中添加菜单项 file.add(newfile); file.add(openfile); file.add(savefile); file.add(exit); //File 菜单项添加快捷键 newfile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_MASK)); openfile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK)); savefile.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK)); exit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_E,InputEvent.CTRL_MASK)); //File 菜单项的注册监听 newfile.addActionListener(this); openfile.addActionListener(this); savefile.addActionListener(this); exit.addActionListener(this); //Color 菜单项的初始化 colorchoice = new JMenuItem("调色板"); colorchoice.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK)); colorchoice.addActionListener(this); color.add(colorchoice); //Help 菜单项的初始化 helpmain = new JMenuItem("帮助主题"); helpin = new JMenuItem("关于小小绘图板"); //Help 菜单中添加菜单项 help.add(helpmain); help.addSeparator();//添加分割线 help.add(helpin); //Help 菜单项的注册监听 helpin.addActionListener(this); helpmain.addActionListener(this); //Stroke 菜单项的初始化 strokeitem = new JMenuItem("设置画笔"); strokeitem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P,InputEvent.CTRL_MASK)); stroke.add(strokeitem); strokeitem.addActionListener(this); //工具栏的初始化 buttonpanel = new JToolBar( JToolBar.HORIZONTAL); icons = new ImageIcon[names.length]; button = new JButton[names.length]; for(int i = 0 ;i<names.length;i++) { icons[i] = new ImageIcon(getClass().getResource("/icon/"+names[i]+".jpg"));//获得图片（以类路径为基准） button[i] = new JButton("",icons[i]);//创建工具条中的按钮 button[i].setToolTipText(tiptext[i]);//这里是鼠标移到相应的按钮上给出相应的提示 buttonpanel.add(button[i]); button[i].setBackground(Color.red); if(i<3)button[i].addActionListener(this); else if(i<=16) button[i].addActionListener(this); } CheckBoxHandler CHandler = new CheckBoxHandler();//字体样式处理类 bold = new JCheckBox("粗体"); bold.setFont(new Font(Font.DIALOG,Font.BOLD,30));//设置字体 bold.addItemListener(CHandler);//bold注册监听 italic = new JCheckBox("斜体"); italic.addItemListener(CHandler);//italic注册监听 italic.setFont(new Font(Font.DIALOG,Font.ITALIC,30));//设置字体 GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();//计算机上字体可用的名称 fontName = ge.getAvailableFontFamilyNames(); stytles = new JComboBox(fontName);//下拉列表的初始化 stytles.addItemListener(CHandler);//stytles注册监听 stytles.setMaximumSize(new Dimension(400,50));//设置下拉列表的最大尺寸 stytles.setMinimumSize(new Dimension(250,40)); stytles.setFont(new Font(Font.DIALOG,Font.BOLD,20));//设置字体 //工具栏中添加字体式样 buttonpanel.add(bold); buttonpanel.add(italic); buttonpanel.add(stytles); //状态栏的初始化 startbar = new JLabel("我的小小绘图板"); //绘画区的初始化 drawarea = new DrawArea(this); helpobject = new Help(this); fileclass = new FileClass(this,drawarea); Container con = getContentPane();//得到内容面板 con.add(buttonpanel, BorderLayout.NORTH); con.add(drawarea,BorderLayout.CENTER); con.add(startbar,BorderLayout.SOUTH); Toolkit tool = getToolkit();//得到一个Tolkit类的对象（主要用于得到屏幕的大小） Dimension dim = tool.getScreenSize();//得到屏幕的大小 （返回Dimension对象） setBounds(40,40,dim.width-70,dim.height-100); setVisible(true); validate(); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } //设置状态栏显示的字符 public void setStratBar(String s) { startbar.setText(s); } public void actionPerformed(ActionEvent e) { // TODO 事件的处理 for(int i = 3; i<=13;i++) { if(e.getSource() ==button[i]) { drawarea.setCurrentChoice(i); drawarea.createNewitem(); drawarea.repaint(); } } if(e.getSource() == newfile||e.getSource() == button[0])//新建 {fileclass.newFile();} else if(e.getSource() == openfile||e.getSource() == button[1])//打开 {fileclass.openFile();} else if(e.getSource() == savefile||e.getSource() == button[2])//保存 {fileclass.saveFile();} else if(e.getSource() == exit)//退出程序 {System.exit(0);} else if(e.getSource() == colorchoice||e.getSource() == button[14])//弹出颜色对话框 { drawarea.chooseColor();//颜色的选择 } else if(e.getSource() == button[15]||e.getSource()==strokeitem)//画笔粗细 { drawarea.setStroke();//画笔粗细的调整 } else if