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())
