| xlang v5.1 Release
    程序设计语言基础库文档 | 

| 成员变量 | 
在文件 QwtPlotItem.x 第 26 行定义.
| LegendInterest = 0x02 | 
The item is interested in updates of the legend ( of other items ) This flag is intended for items, that want to implement a legend for displaying entries of other plot item.
在文件 QwtPlotItem.x 第 45 行定义.
| ScaleInterest = 0x01 |