文本编辑器源码

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;
import javax.imageio.*;
import java.io.*;

public class EditPanel extends JPanel
{
 public EditPanel()
 {  
  JPanel FontPanel = new JPanel();
  JPanel BackColorPanel = new JPanel();
  JPanel TextAreaPanel = new JPanel();
  ImagePanel picturePanel = new ImagePanel();
  
  JtextArea = new JTextArea(20,40);
  jscrollPane = new JScrollPane(JtextArea);
  
  JPopupMenu jpopupMenu = new JPopupMenu();
  JMenuItem CopyItem = new JMenuItem("复制",new ImageIcon("copy.gif"));
  JMenuItem PastItem = new JMenuItem("粘贴",new ImageIcon("paste.gif"));
  JMenuItem CutItem = new JMenuItem("剪切",new ImageIcon("cut.gif"));
  
  Action pictureAction = new PictureAction();  
  CopyItem.addActionListener(pictureAction);
  PastItem.addActionListener(pictureAction);
  CutItem.addActionListener(pictureAction);
  
  CopyItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_DOWN_MASK));
  CopyItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_DOWN_MASK));
  CopyItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_DOWN_MASK));

  jpopupMenu.add(CopyItem).setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_DOWN_MASK));
  jpopupMenu.add(PastItem).setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_DOWN_MASK));
  jpopupMenu.add(CutItem).setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_DOWN_MASK));
  
  JtextArea.setComponentPopupMenu(jpopupMenu);

  font = new Font("宋体",Font.PLAIN,12);  
  JLabel TypeLabel = new JLabel("类型：");
  JLabel SizeLabel = new JLabel("大小：");
  JLabel ModelLabel = new JLabel("样式：");
  
  ColorSlider1 = new JSlider(0,255,0);
  ColorSlider2 = new JSlider(0,255,0);
  ColorSlider3 = new JSlider(0,255,0);
  ColorSlider1.setPaintTicks(true);
  ColorSlider2.setPaintTicks(true);
  ColorSlider3.setPaintTicks(true);
  ColorSlider1.setMajorTickSpacing(51);
  ColorSlider2.setMajorTickSpacing(51);
  ColorSlider3.setMajorTickSpacing(51);
  ColorSlider1.setMinorTickSpacing(3);
  ColorSlider2.setMinorTickSpacing(3);
  ColorSlider3.setMinorTickSpacing(3);
  ColorSlider1.setPaintTicks(true);
  ColorSlider2.setPaintTicks(true);
  ColorSlider3.setPaintTicks(true);
  ColorSlider1.setPaintLabels(true);
  ColorSlider2.setPaintLabels(true);
  ColorSlider3.setPaintLabels(true);
  
  String[] fonts = GraphicsEnvironment.getLocalGraphicsEnvironment().
  getAvailableFontFamilyNames();
  ModelComboBox = new JComboBox(fonts);
  SizeSlider = new JSlider(0,100,12);
  SizeSlider.setMajorTickSpacing(20);
  SizeSlider.setMinorTickSpacing(2);
  SizeSlider.setPaintTicks(true);
  SizeSlider.setPaintLabels(true);
  TypeCheckBox1 = new JCheckBox("常规");
  TypeCheckBox2 = new JCheckBox("倾斜");
  TypeCheckBox3 = new JCheckBox("加粗");
  
  BackColorListener ColorListener = new BackColorListener();
  ActionListener listener = new FontListener();
  TypeCheckBox1.addActionListener(listener);
  TypeCheckBox2.addActionListener(listener);
  TypeCheckBox3.addActionListener(listener);
  ModelComboBox.addActionListener(listener);
  ColorSlider1.addChangeListener(ColorListener);
  ColorSlider2.addChangeListener(ColorListener);
  ColorSlider3.addChangeListener(ColorListener);
  SizeSlider.addChangeListener(new ChangeListener()
  {
   public void stateChanged(ChangeEvent event)
   {
    JtextArea.setFont(new Font((String)ModelComboBox.getSelectedItem(),font.getStyle(),SizeSlider.getValue()));    
   }   
  });
  
  setLayout(new GridBagLayout());
  FontPanel.setLayout(new GridBagLayout());
  BackColorPanel.setLayout(new GridBagLayout());
  TextAreaPanel.setLayout(new BorderLayout());

  add(FontPanel,new View(0,0).setAnchor(View.CENTER).setInsets(5,5,0,5).setIpad(2, 2).setFill(View.HORIZONTAL).setWeight(0, 0));
  add(BackColorPanel,new View(0,1).setAnchor(View.CENTER).setFill(View.HORIZONTAL).setInsets(5).setWeight(0, 0));
  add(picturePanel,new View(0,2).setAnchor(View.CENTER).setFill(View.BOTH).setInsets(5).setWeight(0,100));
  add(TextAreaPanel,new View(1,0,1,4).setWeight(100, 100).setFill(View.BOTH));
  
  TextAreaPanel.add(jscrollPane,BorderLayout.CENTER);
  
  FontPanel.add(TypeLabel,new View(0,0));
  FontPanel.add(SizeLabel,new View(0,1));
  FontPanel.add(ModelLabel,new View(0,2));
  FontPanel.add(TypeCheckBox1,new View(1,0).setAnchor(View.WEST).setInsets(10));
  FontPanel.add(TypeCheckBox2,new View(2,0).setAnchor(View.WEST).setInsets(10));
  FontPanel.add(TypeCheckBox3,new View(3,0).setAnchor(View.WEST).setInsets(10));
  FontPanel.add(SizeSlider,new View(1,1,3,1).setAnchor(View.WEST).setFill(View.HORIZONTAL).setInsets(5));
  FontPanel.add(ModelComboBox,new View(1,2,3,1).setInsets(10));
  
  BackColorPanel.add(ColorSlider1,new View(0,0).setInsets(5).setFill(View.BOTH).setWeight(100, 100).setIpad(5, 5));
  BackColorPanel.add(ColorSlider2,new View(0,1).setInsets(5).setFill(View.BOTH).setWeight(100, 100).setIpad(5, 5));
  BackColorPanel.add(ColorSlider3,new View(0,2).setInsets(5).setFill(View.BOTH).setWeight(100, 100).setIpad(5, 5));

  Border LowerBorder = BorderFactory.createLoweredBevelBorder();
  Border AreaTextTitle = BorderFactory.createTitledBorder(LowerBorder, "文本框");
  jscrollPane.setBorder(AreaTextTitle);
  
  Border EtchedBorder = BorderFactory.createEtchedBorder();
  Border FontTitle = BorderFactory.createTitledBorder(EtchedBorder, "字体");
  FontPanel.setBorder(FontTitle);
  
  Border BackColorTitle = BorderFactory.createTitledBorder(EtchedBorder, "背景");
  BackColorPanel.setBorder(BackColorTitle);
 }
 
 public JTextArea getTextArea ()
 {
  return JtextArea;  
 }
 private class FontListener implements ActionListener
 {
  public void actionPerformed(ActionEvent event)
  {
   int map = 0;
   if(TypeCheckBox1.isSelected())
   {
    map = Font.PLAIN;
    TypeCheckBox2.setSelected(false);
    TypeCheckBox3.setSelected(false);
    font = font.deriveFont(map);
   }
   if(TypeCheckBox2.isSelected())
   {
    map +=Font.ITALIC;
    TypeCheckBox1.setSelected(false);
    font = font.deriveFont(map);
   }
   if(TypeCheckBox3.isSelected())
   {
    map +=Font.BOLD;
    TypeCheckBox1.setSelected(false); 
    font = font.deriveFont(map);
   }
   JtextArea.setFont(new Font((String)ModelComboBox.getSelectedItem(),font.getStyle(),SizeSlider.getValue()));
  }  
 }
 private class BackColorListener implements ChangeListener
 {
  public void stateChanged(ChangeEvent event)
  {
   int a = ColorSlider1.getValue();
   int b = ColorSlider2.getValue();
   int c = ColorSlider3.getValue();
   JtextArea.setBackground(new Color(a,b,c));
  }  
 }
 private class PictureAction extends AbstractAction
 {
  public void actionPerformed(ActionEvent event)
  {
   System.out.println(getValue(Action.NAME) + "按钮被选择了！");
  }
 }
     class ImagePanel extends JPanel
 { 
    public ImagePanel()
    { 
       // acquire the image
       try
       {
          image = ImageIO.read(new File("heihei.gif"));
       }
       catch (IOException e)
       {
          e.printStackTrace();
       }
    }
   
    public void paintComponent(Graphics g)
    { 
       super.paintComponent(g);
       if (image == null) return;
   
       int imageWidth = image.getWidth(this);
       int imageHeight = image.getHeight(this);

       // draw the image in the upper-left corner
      
       g.drawImage(image, 0, 0 ,this.getWidth(),this.getHeight(),null);
       // tile the image across the panel
    }
 }

 private JTextArea JtextArea;
 private Font font;
 private JCheckBox TypeCheckBox1;
 private JCheckBox TypeCheckBox2;
 private JCheckBox TypeCheckBox3;
 private JSlider SizeSlider;
 private JComboBox ModelComboBox;
 private JSlider ColorSlider1;
 private JSlider ColorSlider2;
 private JSlider ColorSlider3;
 private JScrollPane jscrollPane;
 private Image image;

}