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今天带给大家的是一些绘制图形的案例，第一个是绘制奥运图片，第二个是绘制五角星，第三个是绘制时钟。
1 绘制奥运图片
源码：
import sys from PyQt6.QtWidgets import QApplication, QWidget from PyQt6.QtCore import Qt, QRect from PyQt6.QtGui import (QPainter, QPen, QBrush, QPalette, QColor, QFont, QImage) class myWidget(QWidget): def __init__(self, parent=None): super().__init__(parent) self.setPalette(QPalette(Qt.GlobalColor.white)) # 设置窗口背景颜色为白色 self.setAutoFillBackground(True) self.resize(600, 360) self.setWindowTitle("QPainter基本绘图") def paintEvent(self, event): # 在窗口上绘图 painter = QPainter(self) # 设置图形和文本抗锯齿 painter.setRenderHint(QPainter.RenderHint.Antialiasing) painter.setRenderHint(QPainter.RenderHint.TextAntialiasing) # 设置画笔 pen = QPen() pen.setWidth(3) # 线宽3像素 pen.setStyle(Qt.PenStyle.DotLine) # 虚线 # painter.setPen(pen) painter.setPen(Qt.PenStyle.NoPen) # 设置画刷 brush = QBrush() brush.setColor(Qt.GlobalColor.red) brush.setStyle(Qt.BrushStyle.SolidPattern) # 填充样式 painter.setBrush(brush) # 绘图 rect = QRect(20, 30, 200, 120) painter.drawRect(rect) # 设置画笔线宽为1像素，线型为实线，颜色为红色 pen.setWidth(1) # 线宽1像素 pen.setStyle(Qt.PenStyle.SolidLine) # 实线类型 pen.setColor(Qt.GlobalColor.blue) # 红颜色 painter.setPen(pen) # 设置刷子颜色为蓝色，并设置填充样式为对角线模式 brush.setColor(Qt.GlobalColor.blue) brush.setStyle(Qt.BrushStyle.BDiagPattern) # 填充样式 painter.setBrush(brush) # 使用新的画笔和刷子绘制一个扇形，其圆心位于(280, 30)，半径分别为200和100，起始角度为30度，结束角度为300度 painter.drawPie(280, 30, 200, 100, 30 * 16, 300 * 16) rect = QRect(20, 150, 240, 100) text = "我是奥运冠军，自信放光芒~！" pen.setColor(QColor(150, 255, 3)) painter.setPen(pen) painter.setFont(QFont('楷体', 20)) # 设置字体 painter.drawText(rect, Qt.AlignmentFlag.AlignCenter, text) image = QImage("./images/ticao.jpg") rect = QRect(280, 150, int(image.width() * 0.5), int(image.height()* 0.5)) painter.drawImage(rect, image) if __name__ == "__main__": app = QApplication(sys.argv) w = myWidget() w.show() sys.exit(app.exec())2 绘制五角星
源码如下：
# -*- coding:utf-8 -*- """ ------------------------------------------------ File Name: 五角星的绘制.py Description: Author: lzq date:2024-08-03 09:56 ------------------------------------------------ """ import math import sys from PyQt6.QtWidgets import QApplication, QWidget from PyQt6.QtGui import QPainter, QColor, QBrush, QPainterPath, QPolygon from PyQt6.QtCore import Qt, QPoint class ChinaFlag(QWidget): def __init__(self): super().__init__() self.initUI() def initUI(self): self.setGeometry(100, 100, 500,400) self.setWindowTitle('金色五角星') self.show() def paintEvent(self, e): painter = QPainter() painter.begin(self) self.drawFlag(painter) painter.end() def drawFlag(self, qp): # 红色背景 qp.setBrush(QBrush(QColor(244, 0, 2))) qp.drawRect(10, 10, 288*2, 192*2) polygon=QPolygon([QPoint(100, 100),QPoint(166, 100),QPoint(200, 30),QPoint(232, 100),QPoint(300, 100),QPoint(245, 140),QPoint(280, 220),QPoint(200, 170),QPoint(120, 220),QPoint(155, 140)]) qp.setBrush(QBrush(QColor(255, 255, 0))) qp.drawPolygon(polygon) qp.end() if __name__ == '__main__': app = QApplication(sys.argv) ex = ChinaFlag() sys.exit(app.exec())3 绘制时钟
源码如下：
# -*- coding:utf-8 -*- """ ------------------------------------------------ File Name: 时钟.py Description: Author: lzq date:2024-08-03 10:17 ------------------------------------------------ """ import sys from PyQt6.QtCore import Qt, QPoint, QTime, QTimer,QDate,QRect from PyQt6.QtGui import QColor, QPainter, QPolygon,QFont, QRegion from PyQt6.QtWidgets import QApplication, QWidget class myClock(QWidget): # 时针形状 hourShape = QPolygon([QPoint(6,10),QPoint(-6,10),QPoint(0,-45)]) # 分针形状 minuteShape = QPolygon([QPoint(6,10),QPoint(-6,10),QPoint(0,-70)]) # 时分秒针颜色 hourColor = QColor(0, 255, 0) minuteColor = QColor(0, 0, 255) secondColor = QColor(255, 0, 0) def __init__(self): super().__init__() self.setWindowTitle('绘图综合：实时时钟') # 创建定时器, 每秒刷新 timer = QTimer(self) timer.timeout.connect(self.update) timer.start(1000) def paintEvent(self, event): time = QTime.currentTime() date = QDate.currentDate() year=date.year() month = date.month() day=date.day() ymd=str(year)+'年'+str(month)+'月'+str(day)+'日' rect= QRect(220,150,200,30) painter = QPainter(self) painter.setFont(QFont('黑体',24)) painter.drawText(rect,Qt.AlignmentFlag.AlignCenter,ymd) painter.setRenderHint(QPainter.RenderHint.Antialiasing) #抗锯齿 side = min(self.width(), self.height()) painter.translate(self.width()/2, self.height()/2) #平移到窗口中心点 painter.scale(side/200.0, side/200.0) # 缩放比例 # 绘制小时刻度 painter.setPen(myClock.hourColor) for i in range(12): painter.drawLine(88, 0, 96, 0) painter.rotate(30.0) # 绘制分针刻度 painter.setPen(myClock.minuteColor) for j in range(60): if (j % 5) != 0: painter.drawLine(94, 0, 96, 0) painter.rotate(6.0) # 绘制时针 painter.setPen(Qt.PenStyle.NoPen) painter.setBrush(myClock.hourColor) painter.save() painter.rotate(30.0 * ((time.hour() + time.minute() / 60.0))) # 旋转时针到正确位置 painter.drawPolygon(myClock.hourShape) painter.restore() # 绘制分针 #painter.setPen(Qt.PenStyle.NoPen) painter.setBrush(myClock.minuteColor) painter.save() painter.rotate(6.0 * (time.minute() + time.second() / 60.0)) painter.drawConvexPolygon(myClock.minuteShape) painter.restore() # 绘制秒针 painter.setPen(Qt.PenStyle.NoPen) painter.setBrush(myClock.secondColor) painter.drawEllipse(-4, -4, 8, 8) painter.save() painter.rotate(6.0 * time.second()) painter.drawRoundedRect(-1, -1, 80, 2, 2, 2) painter.restore() # def resizeEvent(self, event): # w = self.width() # h = self.height() # side = min(w, h) # # 为窗口设置一个圆形遮罩 # maskedRegion = QRegion(w/2 - side/2, h/2 - side/ 2, side, side, QRegion.RegionType.Ellipse) # self.setMask(maskedRegion) if __name__ == '__main__': app = QApplication(sys.argv) w = myClock() w.show() sys.exit(app.exec())