介绍

• 使用pyqt绘制各种直线

效果

代码

import sys
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtGui import QPainter, QPen, QPainterPath, QColor, QBrush
from PyQt5.QtCore import Qt, QPoint, QLineF, QPointFclass DrawLinesWidget(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.setGeometry(300, 300, 300, 200)self.setWindowTitle('Draw Lines with PyQt')self.show()def paintEvent(self, e):qp = QPainter()qp.begin(self)self.draw_straight_line(qp)self.draw_wavy_line(qp)self.draw_dashed_line(qp)qp.end()def draw_straight_line(self, qp):pen = QPen(Qt.black, 2, Qt.SolidLine)qp.setPen(pen)qp.drawLine(10, 50, 280, 50)def draw_wavy_line(self, qp):path = QPainterPath()path.moveTo(50, 100)for i in range(10):x = 50 + i * 20y = 100 + 10 * (-1) ** ipath.cubicTo(x, y, x + 10, y + 10, x + 20, y)qp.setPen(QPen(Qt.blue, 2))qp.drawPath(path)def draw_dashed_line(self, qp):pen = QPen(Qt.red, 2, Qt.DashLine)qp.setPen(pen)qp.drawLine(10, 150, 280, 150)if __name__ == '__main__':app = QApplication(sys.argv)ex = DrawLinesWidget()sys.exit(app.exec_())