pyqt5绘画API

绘制正弦曲线

import sys,math
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import Qt
class DrawPoints(QWidget): def __init__(self): super(DrawPoints,self).__init__() self.resize(300,300) self.setWindowTitle('在窗口上用像素点绘制2个周期的正弦曲线') def paintEvent(self, event): painter = QPainter() painter.begin(self) painter.setPen(Qt.blue) size = self.size() for i in range(1000): x = 100 * (-1 + 2.0 * i/1000) + size.width()/2.0 y = -50 * math.sin((x - size.width()/2.0) * math.pi/50) + size.height()/2.0 painter.drawPoint(x,y) painter.end()
if __name__ == '__main__': app = QApplication(sys.argv) main = DrawPoints() main.show() sys.exit(app.exec_())

  

 

  
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文章来源: maoli.blog.csdn.net，作者：刘润森！，版权归原作者所有，如需转载，请联系作者。

原文链接：maoli.blog.csdn.net/article/details/90086029