notepad.java

java实现的超强记事本

		fontItem.setAccelerator(KeyStroke.getKeyStroke('F', Event.CTRL_MASK,
				false));
		fontItem.addActionListener(this);
		fontItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("字体（CTRL+F）");
			}
		});
		formatMenu.add(colorItem);
		colorItem.setMnemonic('H');
		colorItem.setAccelerator(KeyStroke.getKeyStroke('I', Event.CTRL_MASK,
				false));
		colorItem.addActionListener(this);
		colorItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("颜色（CTRL+I）");
			}
		});
		formatMenu.addSeparator();
		formatMenu.add(lineItem);
		lineItem.setState(true);
		lineItem.setEnabled(false);
		lineItem.addItemListener(this);
		lineItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("自动换行");
			}
		});
		// 查看菜单组件
		viewMenu.add(countItem);
		countItem.addActionListener(this);
		viewMenu.add(statueItem);
		statueItem.setState(true);
		statueItem.addItemListener(this);
		statueItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("状态栏");
			}
		});
		// 帮助菜单组件
		helpMenu.add(aboutItem);
		aboutItem.setMnemonic('A');
		aboutItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F8, 0,
				false));
		aboutItem.addActionListener(this);
		aboutItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("关于（F8）");
			}
		});
		// 工具栏
		JToolBar tool = new JToolBar();
		// 新建按钮
		tool.setBorderPainted(true);
		tool.setFloatable(true);
		newicon = new ImageIcon("image/new.gif");
		newButton = new JButton(newicon);
		newButton.setToolTipText("新建");
		newButton.setBorderPainted(false);
		newButton.addActionListener(this);
		newButton.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("新建（CTRL+N）");
			}
		});
		tool.add(newButton);
		// 打开按钮
		openicon = new ImageIcon("image/open.gif");
		openButton = new JButton(openicon);
		openButton.setBorderPainted(false);
		openButton.setToolTipText("打开");
		openButton.addActionListener(this);
		openButton.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("打开（CTRL+O）");
			}
		});
		tool.add(openButton);
		// 保存按钮
		saveicon = new ImageIcon("image/save.gif");
		saveButton = new JButton(saveicon);
		saveButton.setBorderPainted(false);
		saveButton.setToolTipText("保存");
		saveButton.addActionListener(this);
		saveButton.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("保存（CTRL+S）");
			}
		});
		tool.add(saveButton);
		// 撤销按钮
		// 设置分割，下同
		tool.addSeparator();
		undoicon = new ImageIcon("image/undo.gif");
		undoButton = new JButton(undoicon);
		undoButton.setBorderPainted(false);
		undoButton.setToolTipText("撤销");
		undoButton.addActionListener(this);
		undoButton.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("撤销（CTRL+Z）");
			}
		});
		tool.add(undoButton);
		// 重做按钮
		redoicon = new ImageIcon("image/redo.gif");
		redoButton = new JButton(redoicon);
		redoButton.setBorderPainted(false);
		redoButton.setToolTipText("重做");
		redoButton.addActionListener(this);
		redoButton.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("重做（CTRL+R）");
			}
		});
		tool.add(redoButton);
		// 复制按钮
		copyicon = new ImageIcon("image/copy.gif");
		copyButton = new JButton(copyicon);
		copyButton.setBorderPainted(false);
		copyButton.setToolTipText("复制");
		copyButton.addActionListener(this);
		copyButton.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("复制（CTRL+C）");
			}
		});
		tool.add(copyButton);
		// 剪切按钮
		cuticon = new ImageIcon("image/cut.gif");
		cutButton = new JButton(cuticon);
		cutButton.setBorderPainted(false);
		cutButton.setToolTipText("剪切");
		cutButton.addActionListener(this);
		cutButton.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("剪切（CTRL+X）");
			}
		});
		tool.add(cutButton);
		// 粘贴按钮
		pasteicon = new ImageIcon("image/paste.gif");
		pasteButton = new JButton(pasteicon);
		pasteButton.setBorderPainted(false);
		pasteButton.setToolTipText("粘贴");
		pasteButton.addActionListener(this);
		pasteButton.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("粘贴（CTRL+P）");
			}
		});
		tool.add(pasteButton);
		// 删除按钮
		deleteicon = new ImageIcon("image/delete.gif");
		deleteButton = new JButton(deleteicon);
		deleteButton.setBorderPainted(false);
		deleteButton.setToolTipText("删除");
		deleteButton.addActionListener(this);
		deleteButton.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("删除（Delete）");
			}
		});
		tool.add(deleteButton);
		tool.addSeparator();
		// 字体设置按钮
		fonticon = new ImageIcon("image/font.gif");
		fontButton = new JButton(fonticon);
		fontButton.setToolTipText("字体");
		fontButton.setBorderPainted(false);
		fontButton.addActionListener(this);
		fontButton.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("字体（CTRL+F）");
			}
		});
		tool.add(fontButton);
		// 颜色设置按钮
		coloricon = new ImageIcon("image/color.gif");
		colorButton = new JButton(coloricon);
		colorButton.setBorderPainted(false);
		colorButton.setToolTipText("颜色");
		colorButton.addActionListener(this);
		colorButton.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("颜色（CTRL+I）");
			}
		});
		tool.add(colorButton);
		helpicon = new ImageIcon("image/help.gif");
		tool.addSeparator();
		// 帮助按钮
		helpButton = new JButton(helpicon);
		helpButton.setToolTipText("帮助");
		helpButton.setBorderPainted(false);
		helpButton.addActionListener(this);
		helpButton.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("帮助（F8）");
			}
		});
		tool.add(helpButton);
		// 以下设置右键菜单
		popupMenu = new JPopupMenu();
		undopopupItem.addActionListener(this);
		undopopupItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("撤销（CTRL+Z）");
			}
		});
		popupMenu.add(undopopupItem);
		redopopupItem.addActionListener(this);
		redopopupItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("重做（CTRL+R）");
			}
		});
		popupMenu.add(redopopupItem);
		popupMenu.addSeparator();
		cutpopupItem.addActionListener(this);
		cutpopupItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("剪切（CTRL+X）");
			}
		});
		popupMenu.add(cutpopupItem);
		copypopupItem.addActionListener(this);
		copypopupItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("复制（CTRL+C）");
			}
		});
		popupMenu.add(copypopupItem);
		pastepopupItem.addActionListener(this);
		pastepopupItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("粘贴（CTRL+V）");
			}
		});
		popupMenu.add(pastepopupItem);
		deletepopupItem.addActionListener(this);
		deletepopupItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("删除（Delete）");
			}
		});
		popupMenu.add(deletepopupItem);
		popupMenu.addSeparator();
		seleteAllpopupItem.addActionListener(this);
		seleteAllpopupItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("全选（CTRL+A）");
			}
		});
		popupMenu.add(seleteAllpopupItem);
		popupMenu.addSeparator();
		fontpopupItem.addActionListener(this);
		fontpopupItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("字体（CTRL+F）");
			}
		});
		popupMenu.add(fontpopupItem);
		colorpopupItem.addActionListener(this);
		colorpopupItem.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("颜色（CTRL+I）");
			}
		});
		popupMenu.add(colorpopupItem);
		// 添加鼠标事件，弹出右键菜单
		text.addMouseListener(

		new MouseAdapter() { // anonymous inner class

					// handle mouse press event
					public void mousePressed(MouseEvent event) {
						checkForTriggerEvent(event);
					}

					// handle mouse release event
					public void mouseReleased(MouseEvent event) {
						checkForTriggerEvent(event);
					}

					// determine whether event should trigger popup menu
					private void checkForTriggerEvent(MouseEvent event) {
						if (event.isPopupTrigger())
							popupMenu.show(event.getComponent(), event.getX(),
									event.getY());
					}

				} // end anonymous inner clas

				); // end call to addMouseListener
		// 工具栏鼠标事件，状态栏显示鼠标当前指于工具栏
		tool.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("工具栏");
			}
		});
		// 菜单栏鼠标事件，状态栏显示鼠标当前指于菜单栏
		bar.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("菜单栏");
			}
		});
		// 文本编辑框鼠标事件，状态栏显示鼠标当前指于文本编辑
		text.addMouseListener(new MouseAdapter() {
			public void mouseEntered(MouseEvent e) {
				statuelabel.setText("编辑");
			}
			//用鼠标点击的时候，可以显示编辑提示
			public void mouseClicked(MouseEvent c) {
				statuelabel.setText("编辑");
			}
		});
		//文本键盘事件，当输入时显示当前总字数
		text.addKeyListener(new KeyAdapter() {
			public void keyTyped(KeyEvent event) {
				int bytecount, count;
				if (text.getSelectedText() == null) {
					bytecount = text.getText().getBytes().length;
					count = text.getText().length();
					statuelabel.setText("全文：" + "\n" + "字数： " + count + " 个"
							+ "\n" + "字节数：" + bytecount + "个");
				}
			}
		});
		//这是文本编辑用于侦听文本组件插入符的位置更改的侦听器，可以用来设置组件的显示状态
		text.addCaretListener(new CaretListener(){
			public void caretUpdate(CaretEvent e) {
				//当文本没有选择时，剪切复制和删除不能点击
				if(text.getSelectedText()==null)
				{
					cutItem.setEnabled(false);
					cutpopupItem.setEnabled(false);
					cutButton.setEnabled(false);
					copyItem.setEnabled(false);
					copypopupItem.setEnabled(false);
					copyButton.setEnabled(false);
					deleteItem.setEnabled(false);
					deletepopupItem.setEnabled(false);
					deleteItem.setEnabled(false);
				}
				//当文本进行选择时，可以进行剪切复制和删除了
				else
				{
					//当进行字段选择时，状态栏显示当前选段的字数统计
					int bytecount,count;
					bytecount = text.getSelectedText().getBytes().length;
					count = text.getSelectedText().length();
					statuelabel.setText("您所选择的字段：" + "\n" + "字数： " + count
							+ " 个" + "\n" + "字节数：" + bytecount + "个");
					cutItem.setEnabled(true);
					cutpopupItem.setEnabled(true);
					cutButton.setEnabled(true);
					copyItem.setEnabled(true);
					copypopupItem.setEnabled(true);
					copyButton.setEnabled(true);
					deleteItem.setEnabled(true);
					deletepopupItem.setEnabled(true);
					deleteButton.setEnabled(true);
				}
				//如果可以撤销了
				if(undo.canUndo()){
					undoItem.setEnabled(true);
					undopopupItem.setEnabled(true);
					undoButton.setEnabled(true);
				}
				else
				{
					undoItem.setEnabled(false);
					undopopupItem.setEnabled(false);
					undoButton.setEnabled(false);
				}
				//如果可以重做了
				if(undo.canRedo()){
					redoItem.setEnabled(true);
					redopopupItem.setEnabled(true);
					redoButton.setEnabled(true);
				}