PyQt5 组件之QPen与QBrush

Posted 2021-09-06 在奋斗的大道

QPen

QPen（钢笔）是一个基本的图形对象，用于绘制直线，曲线或者给轮廓画出矩形，椭圆形，多边形及其他形状

实例：QPen的使用

import sys
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *

class Drawing(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        #设置初始位置及窗口大小和标题
        self.setGeometry(300,300,280,270)
        self.setWindowTitle('钢笔样式例子')
    def paintEvent(self,e):

        qp=QPainter()
        qp.begin(self)

        #自定义的方法
        self.drawLines(qp)

        qp.end()
    def drawLines(self,qp):

        #颜色黑色，宽度2，线条样式：SolidLine，从坐标1绘制到坐标2，下面类似，不在标注
        pen=QPen(Qt.black,2,Qt.SolidLine)
        qp.setPen(pen)
        qp.drawLine(20,40,520,40)

        pen.setStyle(Qt.DashLine)
        qp.setPen(pen)
        qp.drawLine(20,80,250,80)

        pen.setStyle(Qt.DashDotLine)
        qp.setPen(pen)
        qp.drawLine(20, 120, 250, 120)

        pen.setStyle(Qt.DotLine)
        qp.setPen(pen)
        qp.drawLine(20, 160, 250, 160)

        pen.setStyle(Qt.DashDotDotLine)
        qp.setPen(pen)
        qp.drawLine(20, 200, 250, 200)

        pen.setStyle(Qt.CustomDashLine)
        pen.setDashPattern([1,4,5,4])
        qp.setPen(pen)
        qp.drawLine(20, 240, 250, 240)
if __name__ == '__main__':
    app=QApplication(sys.argv)
    demo=Drawing()
    demo.show()
    sys.exit(app.exec_())

效果截图:

QBrush

QBrush(画刷)是一个基本的图形对象，用于填充如矩形，椭圆形，多边形等形状，QBrush有三种类型，预定义，过渡，和纹理图案

实例：QBrush的使用

import sys
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *

class Drawing(QWidget):
    def __init__(self,parent=None):
        super(Drawing, self).__init__(parent)
        self.initUI()
    def initUI(self):
        self.setGeometry(300,300,365,280)
        self.setWindowTitle('画刷例子')
        self.show()

    def paintEvent(self,e):

        qp=QPainter()
        qp.begin(self)
        self.drawLines(qp)
        qp.end()
    def drawLines(self,qp):
        brush=QBrush(Qt.SolidPattern)
        qp.setBrush(brush)
        qp.drawRect(10,15,90,60)

        brush = QBrush(Qt.Dense1Pattern)
        qp.setBrush(brush)
        qp.drawRect(130, 15, 90, 60)

        brush = QBrush(Qt.Dense2Pattern)
        qp.setBrush(brush)
        qp.drawRect(250, 15, 90, 60)


        brush = QBrush(Qt.Dense3Pattern)
        qp.setBrush(brush)
        qp.drawRect(10, 105, 90, 60)


        brush = QBrush(Qt.DiagCrossPattern)
        qp.setBrush(brush)
        qp.drawRect(10, 105, 90, 60)


        brush = QBrush(Qt.Dense5Pattern)
        qp.setBrush(brush)
        qp.drawRect(130, 105, 90, 60)


        brush = QBrush(Qt.Dense6Pattern)
        qp.setBrush(brush)
        qp.drawRect(250, 105, 90, 60)


        brush = QBrush(Qt.HorPattern)
        qp.setBrush(brush)
        qp.drawRect(10, 195, 90, 60)

        brush = QBrush(Qt.VerPattern)
        qp.setBrush(brush)
        qp.drawRect(130, 195, 90, 60)

        brush = QBrush(Qt.BDiagPattern)
        qp.setBrush(brush)
        qp.drawRect(250, 195, 90, 60)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    demo = Drawing()
    demo.show()
    sys.exit(app.exec_())

效果截图: