功能描述：
　　　　可以进行文字编辑
具体要求：
1、　　参考windows记事本，五个工具栏，某些功能可以不用实现
2、　　文件工具栏下有新建，打开，保存和退出四个选项，要求实现
3、　　编辑下面要求实现复制，剪切，粘贴，全选等功能
4、　　格式下面要求实现字体功能，有几个字体及颜色选项
5、查看及帮助可以不用实现，予以显示即可(Functional Descr iption:
You can edit text
Specific requirements:
1, reference windows notepad, five toolbars, some features can not be achieved
2, the file under the toolbar has a new, open, save and exit four options that require implementation
3, edit the following requirements to achieve copy, cut, paste, all selected and other functions
4, the format requirements below to achieve the font function, there are several fonts and color options
5, view and help can not be achieved, to be displayed)