PyQt5 – 心跳和呼吸计算器

在这篇文章中，我们将看到如何使用PyQt5创建一个心跳和呼吸的计算器。以下是该计算器的外观。

PyQt5 - 心跳和呼吸计算器

成人的正常静息心率在每分钟60到100次之间。一般来说，休息时的心率越低，意味着心脏功能越有效，心血管功能越强。例如，一个训练有素的运动员的正常静息心率可能接近每分钟40次。

呼吸频率：一个 人的呼吸频率是你每分钟的呼吸次数。一个成年人在休息时的正常呼吸率是每分钟12至20次。休息时的呼吸率低于12次或超过25次被认为是不正常的。

GUI实施步骤：

1.创建一个标题标签，显示计算器的名称

2.创建标签以显示用户选择出生日期和出生时间

3.创建一个QCalendarWidget对象让用户选择出生日期

4.创建一个QTimeEdit对象来获取出生时间

5.创建一个按钮来计算心跳和呼吸

6.创建一个标签来显示计算出的心跳和呼吸

后端实现：

1.使日历成为未来日期块，即把当前日期设为最大日期

2.给按钮添加动作

3.在按钮动作中，从日历中获取日期，从QTimeEdit中获取时间

4.从日期中获取日、月和年，从时间编辑中获取小时和分钟

5.为当前日期和出生日期创建一个数据时间对象

6.从两个日期中获取差值，并得到日和秒

7.将日和秒转换成分钟

8.通过将分钟与平均速率相乘得到心跳和呼吸。

9.在标签的帮助下显示计算出的心跳和呼吸

以下是实施方案

# importing libraries
from PyQt5.QtWidgets import *
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import datetime
import sys
 
 
class Window(QMainWindow):
 
    def __init__(self):
        super().__init__()
 
        # setting title
        self.setWindowTitle("Python ")
 
        # width of window
        self.w_width = 400
 
        # height of window
        self.w_height = 550
 
        # setting geometry
        self.setGeometry(100, 100, self.w_width, self.w_height)
 
        # calling method
        self.UiComponents()
 
        # showing all the widgets
        self.show()
 
    # method for components
    def UiComponents(self):
        # creating head label
        head = QLabel("Beats and Breaths Calculator", self)
 
        head.setWordWrap(True)
 
        # setting geometry to the head
        head.setGeometry(0, 10, 400, 60)
 
        # font
        font = QFont('Times', 15)
        font.setBold(True)
        font.setItalic(True)
        font.setUnderline(True)
 
        # setting font to the head
        head.setFont(font)
 
        # setting alignment of the head
        head.setAlignment(Qt.AlignCenter)
 
        # setting color effect to the head
        color = QGraphicsColorizeEffect(self)
        color.setColor(Qt.darkCyan)
        head.setGraphicsEffect(color)
 
        # creating a label
        b_label = QLabel("Select Birthday and Time", self)
 
        # setting properties  label
        b_label.setAlignment(Qt.AlignCenter)
        b_label.setGeometry(50, 95, 300, 25)
        b_label.setStyleSheet("QLabel"
                              "{"
                              "border : 1px solid black;"
                              "background : rgba(70, 70, 70, 25);"
                              "}")
        b_label.setFont(QFont('Times', 9))
 
        # creating a calendar widget to select the date
        self.calendar = QCalendarWidget(self)
 
        # setting geometry of the calendar
        self.calendar.setGeometry(50, 120, 300, 180)
 
        # setting font to the calendar
        self.calendar.setFont(QFont('Times', 6))
 
        # getting current date
        date = QDate.currentDate()
 
        # blocking future dates
        self.calendar.setMaximumDate(date)
 
        # creating a time edit object to receive time
        self.time = QTimeEdit(self)
 
        # setting properties to the time
        self.time.setGeometry(50, 300, 300, 30)
        self.time.setAlignment(Qt.AlignCenter)
        self.time.setFont(QFont('Times', 9))
 
        # creating a push button
        calculate = QPushButton("Calculate", self)
 
        # setting geometry to the push button
        calculate.setGeometry(125, 360, 150, 40)
 
        # adding action to the calculate button
        calculate.clicked.connect(self.calculate_action)
 
        # creating a label to show percentile
        self.result = QLabel(self)
 
        # setting properties to result label
        self.result.setAlignment(Qt.AlignCenter)
        self.result.setGeometry(50, 420, 300, 110)
        self.result.setWordWrap(True)
        self.result.setStyleSheet("QLabel"
                                  "{"
                                  "border : 3px solid black;"
                                  "background : white;"
                                  "}")
        self.result.setFont(QFont('Arial', 11))
 
    def calculate_action(self):
        # getting birth date day
        birth = self.calendar.selectedDate()
 
        # getting year and month day of birth day
        birth_year = birth.year()
        birth_month = birth.month()
        birth_day = birth.day()
 
        # getting time of from the time edit
        time = self.time.time()
 
        # getting hour and seconds
        hour = time.hour()
        minute = time.minute()
 
        # getting today date
        current = QDate.currentDate()
 
        # getting year and month day of current day
        current = datetime.datetime.now()
 
        # converting  date into date object
        birth_date = datetime.datetime(birth_year, birth_month, birth_day, hour, minute, 0)
 
        # getting difference in both the dates
        difference = current - birth_date
 
        # getting difference in days
        days = difference.days
 
        # setting seconds
        seconds = difference.seconds
 
        # converting days and seconds into minutes
        minutes = seconds / 60 + days * 24 * 60
 
        heartbeat = int(minutes * 65)
 
        breath = int(minutes * 15)
 
        # setting this value with the help of label
        self.result.setText("You have taken " + str(breath) +
                            ", and your heart has beat " + str(heartbeat) +
                            " times since you were born.")
 
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
# start the app
sys.exit(App.exec())