用QT实现的linux下的画曲线功能，主要实现正弦波，方波等波形绘制。-Using QT to achieve under the Linux curve drawing function, the main realization of sine wave, square wave, waveform drawing.

本程序是用Qt做的显示三种基本波形的Demo。 三角波，方波，正弦波。可以启动和停止，能改变幅值和偏移量。-This procedure is to do with Qt, the Demo show the three basic waveform. Triangle wave, square wave, sine wave. You can start and stop, change the amplitude and offset.