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PyQt5之窗口绘图类控件QBrush

QBrush是一个基本的图形对象，用于填充如矩形、椭圆形或多边形等形状。QBrush有三种类型：预定义、过渡和纹理图案。

QBrush的使用

import sys,mathfrom PyQt5.QtWidgets import *from PyQt5.QtGui import *from PyQt5.QtCore import *class Win(QWidget):    def __init__(self):        super().__init__()        self.setGeometry(300, 300,400, 380)        self.setWindowTitle('QBrush的使用')    def paintEvent(self, event):        painter = QPainter()        painter.begin(self)        #自定义绘制方法        self.drawRects(painter)        painter.end()    def drawRects(self,painter):        brush = QBrush(Qt.SolidPattern)        painter.setBrush(brush)        painter.drawRect(10,15,90,60)        brush = QBrush(Qt.Dense1Pattern)        painter.setBrush(brush)        painter.drawRect(130, 15, 90, 60)        brush = QBrush(Qt.Dense2Pattern)        painter.setBrush(brush)        painter.drawRect(250, 15, 90, 60)        brush = QBrush(Qt.Dense3Pattern)        painter.setBrush(brush)        painter.drawRect(10, 105, 90, 60)        brush = QBrush(Qt.Dense4Pattern)        painter.setBrush(brush)        painter.drawRect(130, 105, 90, 60)        brush = QBrush(Qt.Dense5Pattern)        painter.setBrush(brush)        painter.drawRect(250, 105, 90, 60)        brush = QBrush(Qt.Dense6Pattern)        painter.setBrush(brush)        painter.drawRect(10, 195, 90, 60)        brush = QBrush(Qt.Dense7Pattern)        painter.setBrush(brush)        painter.drawRect(130, 195, 90, 60)        brush = QBrush(Qt.HorPattern)        painter.setBrush(brush)        painter.drawRect(250, 195, 90, 60)        brush = QBrush(Qt.VerPattern)        painter.setBrush(brush)        painter.drawRect(10, 285, 90, 60)        brush = QBrush(Qt.BDiagPattern)        painter.setBrush(brush)        painter.drawRect(130, 285, 90, 60)        brush = QBrush(Qt.DiagCrossPattern)        painter.setBrush(brush)        painter.drawRect(250, 285, 90, 60)if __name__ == "__main__":    app = QApplication(sys.argv)    form = Win()    form.show()    sys.exit(app.exec_())

代码分析：在这个例子中，在窗口绘制出12种不同背景填充的矩形。定义QBrush对象，然后将QBrush对象的画刷设置成QBrush对象，并通过调用drawRect()方法绘制矩形。

运行效果如下：

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