swt写的类win记事本

package com.ticmy.notepad.main; import java.util.Observable; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.StyledText; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.VerifyEvent; import org.eclipse.swt.events.VerifyListener; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.FontData; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.FontDialog; import org.eclipse.swt.widgets.Menu; import org.eclipse.swt.widgets.MenuItem; import org.eclipse.swt.widgets.MessageBox; import org.eclipse.swt.widgets.Shell; import com.ticmy.notepad.constant.CommonValue; import com.ticmy.notepad.listener.CopyMenuListener; import com.ticmy.notepad.listener.CreateMenuListener; import com.ticmy.notepad.listener.CutMenuListener; import com.ticmy.notepad.listener.DelMenuListener; import com.ticmy.notepad.listener.ExitMenuListener; import com.ticmy.notepad.listener.OpenMenuListener; import com.ticmy.notepad.listener.PasteMenuListener; import com.ticmy.notepad.listener.SaveMenuListener; import com.ticmy.notepad.listener.SelectAllMenuListener; import com.ticmy.notepad.util.ReadOnlyObservable; import com.ticmy.notepad.util.ReadOnlyObserver; import com.ticmy.notepad.util.Util; public class MainFrame { private final Observable readOnlyObservable = new ReadOnlyObservable(); private final Display display = Display.getDefault(); private Shell shell = null; private StyledText text = null; public MainFrame() { buildShell(); buildTextArea(); buildPopupMenu(); buildMenu(); } private void buildShell() { shell = new Shell(display); FillLayout fillLayout = new FillLayout(); fillLayout.marginHeight = 0; fillLayout.marginWidth = 0; fillLayout.spacing = 0; shell.setLayout(fillLayout); shell.setText("记事本"); shell.setImage(new Image(display, this.getClass().getResourceAsStream(CommonValue.imagePath + "shellicon.gif"))); //居中显示 Rectangle clientArea = display.getClientArea(); int clientHeight = clientArea.height; int clientWidth = clientArea.width; int x, y; if(clientWidth > CommonValue.width) { x = (clientWidth - CommonValue.width) / 2; } else { x = 0; CommonValue.width = clientWidth; } if(clientHeight > CommonValue.height) { y = (clientHeight - CommonValue.height) / 2; } else { y=0; CommonValue.height = clientHeight; } shell.setBounds(x, y, CommonValue.width, CommonValue.height); //关闭的时候提示是否保存 shell.addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent e) { Util.saveCurrent(text); } }); } private void buildPopupMenu() { Menu popup = new Menu(shell, SWT.POP_UP); MenuItem cutMenu = new MenuItem(popup, SWT.PUSH); cutMenu.setText("剪切(&T)"); cutMenu.addSelectionListener(new CutMenuListener(text)); readOnlyObservable.addObserver(new ReadOnlyObserver(cutMenu)); MenuItem copyMenu = new MenuItem(popup, SWT.PUSH); copyMenu.setText("复制(&C)"); copyMenu.addSelectionListener(new CopyMenuListener(text)); MenuItem pasteMenu = new MenuItem(popup, SWT.PUSH); pasteMenu.setText("粘贴(&P)"); pasteMenu.addSelectionListener(new PasteMenuListener(text)); readOnlyObservable.addObserver(new ReadOnlyObserver(pasteMenu)); MenuItem deleteMenu = new MenuItem(popup, SWT.PUSH); deleteMenu.setText("删除(&D)"); deleteMenu.addSelectionListener(new DelMenuListener(text)); readOnlyObservable.addObserver(new ReadOnlyObserver(deleteMenu)); new MenuItem(popup, SWT.SEPARATOR); MenuItem selectAllMenu = new MenuItem(popup, SWT.PUSH); selectAllMenu.setText("全选(&A)"); selectAllMenu.addSelectionListener(new SelectAllMenuListener(text)); text.setMenu(popup); } private void buildTextArea() { text = new StyledText(shell, SWT.MULTI|SWT.LEFT|SWT.H_SCROLL|SWT.V_SCROLL); FontData fd = new FontData("Fixedsys", 11, SWT.NORMAL); Font font = new Font(display, fd); text.setFont(font); text.setTabs(4); text.setWordWrap(true); text.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { CommonValue.currentFileInfo.setModify(true); String savePath = CommonValue.currentFileInfo.getSavePath(); shell.setText("*" + (Util.isEmpty(savePath) ? "记事本" : savePath)); } }); } private void buildMenu() { Menu menuBar = new Menu(shell, SWT.BAR); buildFileMenu(menuBar); buildEditMenu(menuBar); buildFormatMenu(menuBar); buildHelpMenu(menuBar); shell.setMenuBar(menuBar); } private void buildHelpMenu(Menu menuBar) { //帮助菜单 MenuItem helpMenu = new MenuItem(menuBar, SWT.CASCADE); helpMenu.setText("帮助(&H)"); Menu helpSubMenu = new Menu(helpMenu); helpMenu.setMenu(helpSubMenu); MenuItem aboutMenu = new MenuItem(helpSubMenu, SWT.NULL); aboutMenu.setText("关于(&A)"); aboutMenu.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { MessageBox msg = new MessageBox(shell, SWT.ICON_INFORMATION); msg.setText("关于记事本"); msg.setMessage("swt记事本"); msg.open(); } }); } private void buildFormatMenu(Menu menuBar) { //格式菜单 MenuItem formatMenu = new MenuItem(menuBar, SWT.CASCADE); formatMenu.setText("格式(&O)"); Menu formatSubMenu = new Menu(formatMenu); formatMenu.setMenu(formatSubMenu); MenuItem autoWrapMenu = new MenuItem(formatSubMenu, SWT.CHECK); autoWrapMenu.setText("自动换行(&W)"); autoWrapMenu.setSelection(true); autoWrapMenu.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { MenuItem menuItem = (MenuItem)e.widget; boolean selection = menuItem.getSelection(); text.setWordWrap(selection);//这会改变是否修改的属性 } }); MenuItem fontMenu = new MenuItem(formatSubMenu, SWT.NULL); fontMenu.setText("字体(&F)"); fontMenu.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { FontDialog fontDialog = new FontDialog(shell, SWT.NONE); Font oldFont = text.getFont(); if(oldFont != null) { fontDialog.setFontList(oldFont.getFontData()); } FontData fontData = fontDialog.open(); if(fontData == null) { return; } Font newFont = new Font(display, fontData); text.setFont(newFont); if(oldFont != null) { oldFont.dispose(); } } }); } private void buildEditMenu(Menu menuBar) { //构建Edit菜单 MenuItem editMenu = new MenuItem(menuBar, SWT.CASCADE); editMenu.setText("编辑(&E)"); Menu editSubMenu = new Menu(editMenu); editMenu.setMenu(editSubMenu); MenuItem selectAllMenu = new MenuItem(editSubMenu, SWT.NULL); selectAllMenu.setText("全选(&A) Ctrl+A"); selectAllMenu.setAccelerator(SWT.CTRL + 'A'); selectAllMenu.addSelectionListener(new SelectAllMenuListener(text)); MenuItem cutMenu = new MenuItem(editSubMenu, SWT.NULL); cutMenu.setText("剪切(&T) Ctrl+X"); cutMenu.setAccelerator(SWT.CTRL + 'X'); cutMenu.addSelectionListener(new CutMenuListener(text)); readOnlyObservable.addObserver(new ReadOnlyObserver(cutMenu)); MenuItem copyMenu = new MenuItem(editSubMenu, SWT.NULL); copyMenu.setText("复制(&C) Ctrl+C"); copyMenu.setAccelerator(SWT.CTRL + 'C'); copyMenu.addSelectionListener(new CopyMenuListener(text)); MenuItem pasteMenu = new MenuI