http://blog.csdn.net/j_z10/article/details/51829014 widget="statusbar" 头部状态条标签 widget="email" 电子邮件地址标签 widget="selection" 下拉选择标签 widget="mail_followers" 关注者标签 widget="mail_thread" 消息标签 widget="progressbar" 进度条，按百分比标签 widget="one2many_list" 一对多列表标签 widget="many2many_tags" 多对多显示标签 widget="url" 网站链接标签 widget='image' 图片标签 widget="many2many_kanban" 看版标签 widget="handler" 触发标签 widget="radio" 单选标签 widget="char_domain" 字符域标签 widget="monetary" 价格（和精度位数相关）标签 widget="float_time" 单精度时间标签 widget="html" html相关标签 widget="pad" pad显示相关标签 widget="date" 日期标签 widget="monetary" 金额标签 widget='text' 文本标签 widget="sparkline_bar" 燃尽标签 widget="checkbox" 复选框标签 widget="reference" 关联标签 `<field name="partner_type" nolabel="1" widget="selection" string="" attrs="{'required': [('payment_type', 'in', ('inbound', 'outbound'))], 'invisible': [('payment_type', 'not in', ('inbound', 'outbound'))], 'readonly': [('state', '!=', 'draft')]}"/>`