book.java

这是一个用Java编写的类似Windows的记事本

    private void TextCaretUpdate(javax.swing.event.CaretEvent evt) {//GEN-FIRST:event_TextCaretUpdate
       Text.setLineWrap(true);//自动换行
           try{
               int pos = Text.getCaretPosition();//获取行数
               int lineOfC = Text.getLineOfOffset(pos) + 1; //获取列数
               int col = pos - Text.getLineStartOffset(lineOfC - 1) + 1;
               Label.setText("当前光标位置       " + lineOfC + " 行  , " + col + " 列  ");
              }
            catch(Exception ex){
              Label.setText("      无法获得当前光标位置");
            }
        // TODO add your handling code here:
    }//GEN-LAST:event_TextCaretUpdate

    private void NewActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_NewActionPerformed
      int value=-1;
        if(hasChange()){
            String[] buttonTexts={"保存","不保存","取消"};
            value=JOptionPane.showOptionDialog(this, "源程序已经改变，请确认是否保存!", "保存更改？", JOptionPane.DEFAULT_OPTION, JOptionPane.QUESTION_MESSAGE, null, buttonTexts, buttonTexts[0]);
            if(value==JOptionPane.YES_OPTION)
                SaveActionPerformed(evt);
            else if(value==JOptionPane.NO_OPTION){ }
            else if(value==JOptionPane.CANCEL_OPTION)
                return;
    }
        else{
            SaveAsActionPerformed(evt);
        }
        fileName=null;
        Text.setText("");
        setTitle("新建记事本");
        isChange=false;
        return;
    }//GEN-LAST:event_NewActionPerformed

    private void QuitActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_QuitActionPerformed
        if(hasChange()){
            int value = JOptionPane.showConfirmDialog(this,"是否保存当前文本文档？", "保存提示", JOptionPane.OK_OPTION,JOptionPane.WARNING_MESSAGE);
            if (value == JOptionPane.OK_OPTION) {
                SaveActionPerformed(evt);
            } 
            else 
                System.exit(0);  
    }//GEN-LAST:event_QuitActionPerformed
        else  System.exit(0);
    }
    private void CopyActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_CopyActionPerformed
          Text.copy();
          Label.setText("执行了复制操作");
        // TODO add your handling code here:
    }//GEN-LAST:event_CopyActionPerformed

    private void CutActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_CutActionPerformed
         Text.cut();
         Label.setText("执行了剪切操作");   
        // TODO add your handling code here:
    }//GEN-LAST:event_CutActionPerformed

    private void PasteActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_PasteActionPerformed
         Text.paste();
         Label.setText("执行了粘贴操作");   
        // TODO add your handling code here:
    }//GEN-LAST:event_PasteActionPerformed

    private void SelectAllActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_SelectAllActionPerformed
         Text.selectAll();
         Label.setText("执行了全选操作");   
        // TODO add your handling code here:
    }//GEN-LAST:event_SelectAllActionPerformed

    private void DeleteActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_DeleteActionPerformed
      this.Text.replaceRange(null,this.Text.getSelectionStart(),this.Text.getSelectionEnd());
      Label.setText("执行了删除操作");
        // TODO add your handling code here:
    }//GEN-LAST:event_DeleteActionPerformed

    private void bNewActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bNewActionPerformed
       NewActionPerformed(evt);
       // TODO add your handling code here:
}//GEN-LAST:event_bNewActionPerformed

    private void OpenActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_OpenActionPerformed
         BufferedReader input=null;
         String textString;
         int ret=fileChooser.showOpenDialog(this);
         if(ret!=JFileChooser.APPROVE_OPTION)
             return;
         NewActionPerformed(evt);
         fileName=fileChooser.getSelectedFile();
         if(fileName.exists()&&fileName.canRead()){
             setTitle("记事本:"+fileName.getName());
             try{
                 input=new BufferedReader(new FileReader(fileName));
                 while((textString=input.readLine())!=null)
                 Text.append(textString+"\n");
                 input.close();
             }
             catch(IOException e){
                JOptionPane.showMessageDialog(this, "文件打开错误,没有打开");
            }
             finally{
                input=null;
            }
             isChange=false;
             return;
        }
        // TODO add your handling code here:
    }//GEN-LAST:event_OpenActionPerformed

    private void bOpenActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bOpenActionPerformed
        OpenActionPerformed(evt);
        // TODO add your handling code here:
}//GEN-LAST:event_bOpenActionPerformed

    private void bSaveActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bSaveActionPerformed
        SaveActionPerformed(evt);    
        // TODO add your handling code here:
}//GEN-LAST:event_bSaveActionPerformed

    private void bCutActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bCutActionPerformed
       CutActionPerformed(evt);
        // TODO add your handling code here:
}//GEN-LAST:event_bCutActionPerformed

    private void bCopyActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bCopyActionPerformed
        CopyActionPerformed(evt);
        // TODO add your handling code here:
}//GEN-LAST:event_bCopyActionPerformed

    private void bPasteActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bPasteActionPerformed
        PasteActionPerformed(evt);
        // TODO add your handling code here:
}//GEN-LAST:event_bPasteActionPerformed

    private void bDeleteActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bDeleteActionPerformed
        DeleteActionPerformed(evt);
        // TODO add your handling code here:
}//GEN-LAST:event_bDeleteActionPerformed

    private void bUndoActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_bUndoActionPerformed
       UndoActionPerformed(evt);
        // TODO add your handling code here:
}//GEN-LAST:event_bUndoActionPerformed

    private void UndoActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_UndoActionPerformed
        Manager.undo();  
    }//GEN-LAST:event_UndoActionPerformed

    public void undoableEditHappened(UndoableEditEvent parm1) {
        boolean addEdit = Manager.addEdit(parm1.getEdit());
    }

    private void SearchActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_SearchActionPerformed
      final JDialog jd = new JDialog(this, "替换", true);
        GridBagLayout gbl = new GridBagLayout();
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.weightx = 1;
        gbc.weighty = 1;
        gbc.gridwidth = 1;
        gbc.gridheight = 1;
        JLabel jlFind = new JLabel("查找:");
        JLabel jp = new JLabel("替换内容:");
        final JTextField jtf = new JTextField(15);
        final JTextField jtf1 = new JTextField(15);
        jd.getContentPane().setLayout(gbl);
        jd.setSize(330, 150);
        jd.setResizable(false);
        final JButton jbReplaceAll = new JButton("替换");
        final JButton jbCancel = new JButton("取消");
        final JButton jbFind = new JButton("查找");
        gbc.gridx = 0;
        gbc.gridy = 0;
        jd.getContentPane().add(jlFind, gbc);
        gbc.gridx = 1;
        gbc.gridy = 0;
        jd.getContentPane().add(jtf1, gbc);
        gbc.gridx = 2;
        gbc.gridy = 0;
        jd.getContentPane().add(jbFind, gbc);
        gbc.gridx = 0;
        gbc.gridy = 1;
        jd.getContentPane().add(jp, gbc);
        gbc.gridx = 1;
        gbc.gridy = 1;
        jd.getContentPane().add(jtf, gbc);
        gbc.gridx = 2;
        gbc.gridy = 1;
        jd.getContentPane().add(jbReplaceAll, gbc);
        gbc.gridx = 2;
        gbc.gridy = 2;
        jd.getContentPane().add(jbCancel, gbc);
        jbFind.addActionListener(new ActionListener() {
            private int StartFindPos=0;
            private int b;
            private int a;
            public void actionPerformed(ActionEvent efind) {
                String strA = Text.getText();
                    String strB = jtf1.getText();
                    if (a >= 0) {
                        a = strA.indexOf(strB, StartFindPos);
                        b = strB.length();
                        StartFindPos = a + b;
                        if (a == -1) {
                            JOptionPane.showMessageDialog(null, "没有您要查找的信息", "查找结果", 1);
                            a = 0;
                            StartFindPos = 0;
                        }
                        Text.select(a, StartFindPos);
                    }
            }
        });
        jbReplaceAll.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                int a = 0;
                int b;
                int StartFindPos = 0;
                while (a > -1) {
                    String strA = Text.getText();
                    String strB = jtf1.getText();
                    a = strA.indexOf(strB, StartFindPos);
                    if (a == -1) {
                        break;
                    }
                    b = strB.length();
                    StartFindPos = a + b;
                    Text.select(a, StartFindPos);
                    String strRepleaceAll = jtf.getText();
                    Text.replaceSelection(strRepleaceAll);
                    StartFindPos = a + b;
                }
                JOptionPane.showMessageDialog(null, "全部替换完毕", "替换内容", 1);
                a = 0;
                StartFindPos = 0;
            }
            });
        jbCancel.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ejb) {
                jd.dispose();
            }
            });
        jd.setLocation(240, 200);
        jd.setVisible(true);
        jd.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        // TODO add your handling code here:
    }//GEN-LAST:event_SearchActionPerformed

    private void AboutActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_AboutActionPerformed
       about guanyu=new about();
       guanyu.show();
        // TODO add your handling code here:
    }//GEN-LAST:event_AboutActionPerformed

    private void RedoActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_RedoActionPerformed
          Manager.redo();
        // TODO add your handling code here:
    }//GEN-LAST:event_RedoActionPerformed

    private void SetColorActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_SetColorActionPerformed
       Color color=JColorChooser.showDialog(Text, "选择颜色", Color.BLACK);
       Text.setForeground(color);
       // TODO add your handling code her
    }//GEN-LAST:event_SetColorActionPerformed

    private void FontActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_FontActionPerformed
      new font(Text);
    }
    
    class font{
    private JTextArea textArea;
    private JButton ok,cancel;
    private JComboBox fontName,fontSize,fontStyle;
    GraphicsEnvironment ge;//定义系统字体对象
    String[]    size = {"8","10","12","14","16","18","20","22","24","26","28","32","36","48","72","96"};
    String[]    style= {"PLAIN","BOLD","ITALIC"};
    JFrame jf = new JFrame("字体设置");
    public font(JTextArea Text){
        this.textArea=Text;
        JLabel label1=new JLabel("    字体                                         ");
        JLabel label2=new JLabel(" 字号        ");
        JLabel label3=new JLabel(" 样式        ");
        ge = GraphicsEnvironment.getLocalGraphicsEnvironment();//获取系统字体
        String[] fontname = ge.getAvailableFontFamilyNames();
        fontName = new JComboBox(fontname);
        fontSize = new JComboBox(size);
        fontStyle = new JComboBox(style);
        ok = new JButton("确定");
        cancel = new JButton("取消");
        jf.setLayout(new BorderLayout());
        JPanel p1 = new JPanel();
        JPanel p2 = new JPanel();
        JPanel p3 = new JPanel();
        p1.add(label1);
        p1.add(label2);
        p1.add(label3);
        p2.add(fontName);
        p2.add(fontSize);
        p2.add(fontStyle);
        p3.add(ok);