PyQt5最全27 绘图之drawLine绘制不同类型的直线

import sys
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtGui import QPainter, QPen
from PyQt5.QtCore import Qt


class DrawMultiLine(QWidget):
    """
    drawLine绘制不同类型的直线
    QPainter
    painter = QPainter()
    painter.begin()
    painter.drawText(...)
    painter.end()
    必须在事件方法中绘制各种元素
    """
    def __init__(self):
        super(DrawMultiLine, self).__init__()
        self.setWindowTitle('设置Pen的样式')
        self.resize(300, 200)

    def paintEvent(self, event):
        painter = QPainter()
        painter.begin(self)

        pen = QPen(Qt.red, 2, Qt.SolidLine)
        painter.setPen(pen)
        painter.drawLine(20, 40, 250, 40)

        pen.setStyle(Qt.DashLine)
        painter.setPen(pen)
        painter.drawLine(20, 60, 250, 60)

        pen.setStyle(Qt.DashDotDotLine)
        painter.setPen(pen)
        painter.drawLine(20, 80, 250, 80)

        pen.setStyle(Qt.DotLine)
        painter.setPen(pen)
        painter.drawLine(20, 100, 250, 100)

        pen.setStyle(Qt.DashDotDotLine)
        painter.setPen(pen)
        painter.drawLine(20, 120, 250, 120)

        # 自定义
        pen.setStyle(Qt.CustomDashLine)
        pen.setDashPattern([1, 4, 5, 4])
        painter.setPen(pen)
        painter.drawLine(20, 140, 250, 140)

        painter.end()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    main = DrawMultiLine()
    print(main.__doc__)
    main.show()
    sys.exit(app.exec_())