wordpad.java

一个简单的Java编写的写字板的源代码

    void Save()
    {
        if(File!=null)
            SaveAssist(File);
        else if(File==null)
            SaveAs();    
    }

    void SaveAs()
    {
        JFileChooser fc = new JFileChooser();
        fc.addChoosableFileFilter(new FileFilterr(".txt","文本文档(*.txt)"));
        fc.addChoosableFileFilter(new FileFilterr(".doc","Word 文档(*.doc)"));
        if(fc.showSaveDialog(this) == JFileChooser.APPROVE_OPTION)
        {
            File file = new File(fc.getCurrentDirectory(),fc.getSelectedFile().getName());
            if(file.exists())
            {
                int i = JOptionPane.showConfirmDialog(this,file.getPath() + " 已存在。\n" + "要替换它吗？","保存为",JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE);
                if(i==0)
                {
                    SaveAssist(file);
                    File = file;
                }
                else if(i==1)
                    SaveAs();
            }
            else
            {
                SaveAssist(file);
                File = file;
            }
        }
    }

    void OpenAssist()
    {
        JFileChooser fc = new JFileChooser();
        fc.addChoosableFileFilter(new FileFilterr(".txt","文本文档(*.txt)"));
        fc.addChoosableFileFilter(new FileFilterr(".doc","Word 文档(*.doc)"));
        fc.addChoosableFileFilter(new FileFilterr("*.*","所有文件(*.*)"));
        if(fc.showOpenDialog(this)==JFileChooser.APPROVE_OPTION)
        {
            File file = new File(fc.getCurrentDirectory(),fc.getSelectedFile().getName());
            if(file.exists())
            {
                try
                {
//                    FileInputStream fis = new FileInputStream(file);
//                    ObjectInputStream ois = new ObjectInputStream(fis);
//                    sd = (StyledDocument) ois.readObject();
//                    saved = true;
//                    validate();
//                }
                BufferedReader br = new BufferedReader(new FileReader(file));
   		String string;
   		while ((string = br.readLine())!=null)
                    TextArea.setText(TextArea.getText() + string);
                br.close();
   		TextArea.setCaretPosition(0);
                }
                catch(IOException ioe)
                {
                    System.err.println("IOException: " + ioe.getMessage());
                }
//                catch (ClassNotFoundException cnfe)
//                {
//		    System.err.println("Class not found: " + cnfe.getMessage());
//		}
            }
            else
            {
                JOptionPane.showMessageDialog(null,"fc.getSelectedFile().getName()\n文件不存在\n请检查所给的文件名是否正确","错误",0);
            }	
        }
    }

    void Open()
    {
        if(saved==true)
        {
            OpenAssist();
        }
        else if(File==null && TextArea.getText().equals(""))
        { 
            OpenAssist();
        }
        else if(File==null)
        {
            int i = JOptionPane.showConfirmDialog(this,"将改动保存到 文档？","计事本",JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE);
            if(i==0)
            {
                SaveAs();
                OpenAssist();
            }
            else if(i==1)
            {
                OpenAssist();
            }
        }
        else if(File!=null)
        {
            int i = JOptionPane.showConfirmDialog(this,"将改动保存到" + File.getPath() + "文档？","WordPad",JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE);
            if(i==0)
            {
                Save();
                OpenAssist();
            }
            else if(i==1)
                OpenAssist();
        }
    }
    
    void Exit()
    {
        if(saved)
            System.exit(0);
        else if(File==null && TextArea.getText().equals(""))
            System.exit(0);
        else if(File==null)
        {
            int i = JOptionPane.showConfirmDialog(this,"将改动保存到 文档？","WordPad",JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE);
            if(i==0)
            {
                Save();
                System.exit(0);
            }
            else if(i==1)
                System.exit(0);
        }
        else if(File!=null)
        {
            int i = JOptionPane.showConfirmDialog(this,"将改动保存到" + File.getName() + "文档？","WordPad",JOptionPane.YES_NO_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE);
            if(i==0)
            {
                Save();
                System.exit(0);
            }
            else if(i==1)
                System.exit(0);        
        }
    }
    
    void setCharacterAttributes(AttributeSet s)
    {
        int start = TextArea.getSelectionStart();
        int end = TextArea.getSelectionEnd();
        if(start!=end)
        {
            sd.setCharacterAttributes(start, end-start, s, false);
//            TextArea.setCaretPosition(start);
        }
//        else if(start==end)
//        {
//            TextArea.setCharacterAttributes(s, true);
//            TextArea.setCaretPosition(start);
//        }
        getStyledEditorKit().getInputAttributes().addAttributes(s);
    }
    
    StyledEditorKit getStyledEditorKit()
    {
        EditorKit ek = TextArea.getEditorKit();
        if (ek instanceof StyledEditorKit)
           return (StyledEditorKit) ek;
        throw new IllegalArgumentException("Only StyledEditorKit!");
    }

    public void actionPerformed(ActionEvent e)
    {
        if(e.getSource()==File_New || e.getSource()==Tool_New)
            New();
        else if(e.getSource()==File_Open || e.getSource()==Tool_Open)
            Open();
        else if(e.getSource()==File_Save || e.getSource()==Tool_Save)
            Save();
        else if(e.getSource()==File_SaveAs)
            SaveAs();
        else if(e.getSource()==File_Exit)
            Exit();
        if(e.getSource()==Help_About)
        JOptionPane.showMessageDialog(null,"张惟伊倾情钜献\nProduced by ZV!","关于写字板",3,new ImageIcon("pic/mili.jpg"));
    else if(e.getSource()==Format_Auto)
    {
//        if(Format_Auto.isSelected())
//            TextArea.setLineWrap(true);
//        else
//            TextArea.setLineWrap(false);
    }
        else if(e.getSource()==Edit_Undo || e.getSource()==Tool_Undo)
        {
            if(um.canUndo())
                um.undo();
        }
        else if(e.getSource()==Edit_Redo || e.getSource()==Tool_Redo)
        {
            if(um.canRedo())
                um.redo();
        }
        else if(e.getSource() == Edit_Cut || e.getSource() == Tool_Cut)
            TextArea.cut();
        else if(e.getSource() == Edit_Copy || e.getSource() == Tool_Copy)
            TextArea.copy();
        else if(e.getSource() == Edit_Paste || e.getSource() == Tool_Paste)
            TextArea.paste();
        else if(e.getSource() == Edit_Del || e.getSource() == Tool_Delete)
            TextArea.replaceSelection("");
        else if(e.getSource() == Edit_SelectAll)
            TextArea.selectAll();
        else if(e.getSource() == Insert_DateTime ||e.getSource()==Tool_DateTime)
        {
            Date d = new Date();
            TextArea.setText(TextArea.getText() + d.toString());
        }
        else if(e.getSource()==Insert_Picture)
        {
            JFileChooser jfc = new JFileChooser();
            jfc.addChoosableFileFilter(new FileFilterr(".bmp","位图(*.bmp)"));
            jfc.addChoosableFileFilter(new FileFilterr(".jpg","JPEG(*.jpg)"));
            jfc.addChoosableFileFilter(new FileFilterr(".gif","GIF(*.gif)"));
            if(jfc.showOpenDialog(this)==JFileChooser.APPROVE_OPTION)
                TextArea.insertIcon(new ImageIcon(jfc.getSelectedFile().getPath()));
        }
        else if(e.getSource()==View_Tool)
        {
            if(View_Tool.isSelected())
                ToolBar.setVisible(true);
            else
                ToolBar.setVisible(false);
        }
        else if(e.getSource()==View_Format)
        {
            if(View_Format.isSelected())
                FormatBar.setVisible(true);
            else
                FormatBar.setVisible(false);
        }
        else if(e.getSource()==Format_Font)
        {
            Fontt = new Fontt(this,Font);
            TextArea.setFont(Fontt.Font);
        }
        else if(e.getSource()==FormatBar_Font)
        {
            MutableAttributeSet sas=new SimpleAttributeSet();
            StyleConstants.setFontFamily(sas, (String)FormatBar_Font.getSelectedItem());
            setCharacterAttributes(sas);
        }
        else if(e.getSource()==FormatBar_Color || e.getSource()==Format_FontColor)
        {
            MutableAttributeSet sas = getStyledEditorKit().getInputAttributes();
            JColorChooser jcc = new JColorChooser();
            StyleConstants.setForeground(sas, Color = jcc.showDialog(this, "颜色", Color));
            setCharacterAttributes(sas);
        }
        else if(e.getSource()==FormatBar_Size)
        {
            MutableAttributeSet sas = getStyledEditorKit().getInputAttributes();
            StyleConstants.setFontSize(sas,new Integer((String)FormatBar_Size.getSelectedItem()));
            setCharacterAttributes(sas);
        }
        else if(e.getSource()==FormatBar_Bold)
        {
            MutableAttributeSet sas = getStyledEditorKit().getInputAttributes();
            boolean bold = (StyleConstants.isBold(sas)) ? false : true;
            StyleConstants.setBold(sas, bold);
            setCharacterAttributes(sas);            
        }
        else if(e.getSource()==FormatBar_Itical)
        {
            MutableAttributeSet sas = getStyledEditorKit().getInputAttributes();
            boolean itical = (StyleConstants.isItalic(sas)) ? false : true;
            StyleConstants.setItalic(sas, itical);
            setCharacterAttributes(sas);
        }
        else if(e.getSource()==FormatBar_U)
        {
            MutableAttributeSet sas = getStyledEditorKit().getInputAttributes();
            boolean underline = (StyleConstants.isUnderline(sas)) ? false : true;
            StyleConstants.setUnderline(sas, underline);
            setCharacterAttributes(sas);
        }
        else if(e.getSource()==FormatBar_Left)
        {
            MutableAttributeSet sas = getStyledEditorKit().getInputAttributes();
            StyleConstants.setAlignment(sas, 0);
            setCharacterAttributes(sas);
        }
        else if(e.getSource()==FormatBar_Center)
        {
            MutableAttributeSet sas = getStyledEditorKit().getInputAttributes();
            StyleConstants.setAlignment(sas, 1);
            setCharacterAttributes(sas);
        }
        else if(e.getSource()==FormatBar_Right)
        {
            MutableAttributeSet sas = getStyledEditorKit().getInputAttributes();
            StyleConstants.setAlignment(sas, 2);
            setCharacterAttributes(sas);
        }
        else if(e.getSource()==Edit_Find || e.getSource()==Tool_Find)
            Find = new Find(this);
        else if(e.getSource()==Edit_Replace)
            Replace = new Replace(this);
    }

    public void insertUpdate(DocumentEvent de)
    {
        saved = false;
        File_Save.setEnabled(true);
        Tool_Save.setEnabled(true);
    }

    public void removeUpdate(DocumentEvent de)
    {
        saved=false;
        File_Save.setEnabled(true);
        Tool_Save.setEnabled(true);
    }

    public void changedUpdate(DocumentEvent de)
    {
        saved=false;
        File_Save.setEnabled(true);
        Tool_Save.setEnabled(true);
    }

    public void undoableEditHappened(UndoableEditEvent uee)
    {
        um.addEdit(uee.getEdit());
    }

    public static void main(String[] args)
    {
        WordPad z=new WordPad();
        z.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    }
}