基于Qt/E的嵌入式实时曲线显示界面设计与实现

为解决手持设备实测数据曲线绘制时间过长、屏幕映射时会出现屏幕闪烁的现象,以及数据需要及时保存和回调查看的问题,提出了在Qt4下将QGraphicsScene类和QList＜T＞容器类结合起来实现采集数据的实时显示方法,该方法把QGraphicsScene类作为父对象,将QList＜T＞容器类的值类型T设为QGraphi...

Design and implementation of embedded real-time curve display interface based on the Qt/E

The handheld devices cost too much time to draw the real-time curve of test data,and the screen mapping will appear in the screen flicker phenomenon,as well as the data need to be saved and callback in time.In order to solve these problems,the QGraphicsScene class and QList container based on Qt4 are combined to achieve the data collection immediately display.The QGraphicsScene is used as father object,the value of the QList container class is defined as QGraphicsItem,and the new collected data will be added at the at the end to QList.This method can improve the efficiency of curve display interface than double buffer method in real-time performance,and the data can be saved.The saved data also can be callback in the form of curve.It is convenient for users to compare and analyze the test data in different periods.