PyQt实现钟表效果
注意：本程序在Python3.3+PyQt5测试通过
主要目的是为了锻炼使用Qt绘图的相关知识
"""Created on 2013-7-2
@author: badboy
Email:lucky.haiyu@gmail.com
QQ:43831266
"""
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class clockForm(QWidget):
def __init__(self,parent=None):
super(clockForm,self).__init__(parent)
self.setWindowTitle("Clock")
self.timer=QTimer()
#设置窗口计时器
self.timer.timeout.connect(self.update)
self.timer.start(1000)
def paintEvent(self,event):
painter=QPainter(self)
painter.setRenderHint(QPainter.Antialiasing)
#设置表盘中的文字字体
font=QFont("Times",6)
fm=QFontMetrics(font)
fontRect=fm.boundingRect("99")#获取绘制字体的矩形范围
#分针坐标点
minPoints=[QPointF(50,25),
QPointF(48,50),
QPointF(52,50)]
#时钟坐标点
hourPoints=[QPointF(50,35),
QPointF(48,50),
QPointF(52,50)]
side=min(self.width(),self.height())
painter.setViewport((self.width()-side)/2,(self.height()-side)/2,
side,side)#始终处于窗口中心位置显示
#设置QPainter的坐标系统，无论窗体大小如何变化，
#窗体左上坐标为(0,0),右下坐标为(100,100),
#因此窗体中心坐标为(50,50)
painter.setWindow(0,0,100,100)
#绘制表盘，使用环形渐变色
niceBlue=QColor(150,150,200)
haloGrident=QRadialGradient(50,50,50,50,50)
haloGrident.setColorAt(0.0,Qt.lightGray)
haloGrident.setColorAt(0.5,Qt.darkGray)
haloGrident.setColorAt(0.9,Qt.white)
haloGrident.setColorAt(1.0,niceBlue)
painter.setBrush(haloGrident)
painter.setPen(QPen(Qt.darkGray,1))
painter.drawEllipse(0,0,100,100)
transform=QTransform()
#绘制时钟为0的字，以及刻度
painter.setPen(QPen(Qt.black,1.5))
fontRect.moveCenter(QPoint(50,10+fontRect.height()/2))
painter.setFont(font)
painter.drawLine(50,2,50,8)#
painter.drawText(QRectF(fontRect),Qt.AlignHCenter|Qt.AlignTop,"0")
for i in range(1,12):
transform.translate(50, 50)
transform.rotate(30)
transform.translate(-50,-50)
painter.setWorldTransform(transform)
painter.drawLine(50,2,50,8)
painter.drawText(QRectF(fontRect),Qt.AlignHCenter|Qt.AlignTop,"%d" % i)
transform.reset()
#绘制分钟刻度线
painter.setPen(QPen(Qt.blue,1))
for i in range(1,60):
transform.translate(50,50)
transform.rotate(6)
transform.translate(-50,-50)
if i%5!=0:
painter.setWorldTransform(transform)
painter.drawLine(50,2,50,5)
transform.reset()
#获取当前时间
currentTime=QTime().currentTime()
hour=currentTime.hour() if currentTime.hour()<12 else currentTime.hour()-12
minite=currentTime.minute()
second=currentTime.second()
#获取所需旋转角度
hour_angle=hour*30.0+(minite/60.0)*30.0
minite_angle=(minite/60.0)*360.0
second_angle=second*6.0
#时针
transform.translate(50,50)
transform.rotate(hour_angle)
transform.translate(-50,-50)
painter.setWorldTransform(transform)
painter.setPen(Qt.NoPen)
painter.setBrush(QBrush(Qt.darkRed))
painter.drawPolygon(QPolygonF(hourPoints))
transform.reset()
#分针
transform.translate(50,50)
transform.rotate(minite_angle)
transform.translate(-50,-50)
painter.setWorldTransform(transform)
painter.setBrush(QBrush(Qt.darkGreen))
painter.drawPolygon(QPolygonF(minPoints))
transform.reset()
#秒针
transform.translate(50,50)
transform.rotate(second_angle)
transform.translate(-50,-50)
painter.setWorldTransform(transform)
painter.setPen(QPen(Qt.darkCyan,1))
painter.drawLine(50,50,50,20)
if __name__=="__main__":
import sys
app=QApplication(sys.argv)
form=clockForm()
form.show()
app.exec_()
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