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Python PyQt5实战项目之网速监控器的实现

作者：不侠居

PyQt5以一套Python模块的形式来实现功能。它包含了超过620个类，600个方法和函数。它是一个多平台的工具套件，它可以运行在所有的主流操作系统中，包含Unix，Windows和Mac OS。PyQt5采用双重许可模式。开发者可以在GPL和社区授权之间选择

简介

看到了一个能够轻松实现获取系统运行的进程和系统利用率（包括CPU、内存、磁盘、网络等）信息的模块–psutil模块。这次利用psutil.net_io_counters()这个方法。

psutil模块使用

>>> psutil.net_io_counters() # 获取网络读写字节／包的个数

snetio(bytes_sent=16775953, bytes_recv=712657945, packets_sent=216741, packets_recv=485775, errin=0, errout=0, dropin=0, dropout=0)

bytes_sent:上传数据
bytes_recv: 接收数据

主界面

class NetWindows(QMainWindow):
    net_signal = pyqtSignal(str,str)
    def __init__(self):
        super(NetWindows,self).__init__()
        self.ui_init()  
        self.thread_init()


    def ui_init(self):
        self.setWindowTitle('网速')
        self.resize(200,80)
        self.setWindowOpacity(0.9) # 设置窗口透明度
        self.setWindowFlag(Qt.FramelessWindowHint) # 隐藏边框
        self.setWindowFlag(Qt.WindowStaysOnTopHint) # 窗口始终显示在最前面
        self.upload_icon = QLabel()
        self.upload_icon.setPixmap(QPixmap(':res/upload.png'))
        self.upload_icon.setScaledContents(True)
        self.download_icon = QLabel()
        self.download_icon.setPixmap(QPixmap(':res/download.png'))
        self.download_icon.setScaledContents(True)
        self.upload_text = QLabel()
        self.upload_text.setText('upload: ')
        self.download_text = QLabel()
        self.download_text.setText('download: ')

        self.upload_lab = QLabel()
        self.download_lab = QLabel()

        self.g_layout = QGridLayout()
        self.g_layout.addWidget(self.upload_icon,0,0,1,1)
        self.g_layout.addWidget(self.download_icon,1,0,1,1)
        self.g_layout.addWidget(self.upload_text,0,1,1,1)
        self.g_layout.addWidget(self.download_text,1,1,1,1)
        self.g_layout.addWidget(self.upload_lab,0,2,1,4)
        self.g_layout.addWidget(self.download_lab,1,2,1,4)
        self.widget = QWidget()
        self.widget.setLayout(self.g_layout)
        self.setCentralWidget(self.widget)

    def thread_init(self):
        self.net_thread = NetThread()
        self.net_thread.net_signal.connect(self.net_slot)
        self.net_thread.start(1000)

    def variate_init(self):
        self.upload_content = ''
        self.download_content = ''

    def net_slot(self,upload_content,download_content):
        self.upload_lab.setText(upload_content)
        self.download_lab.setText(download_content)

    
    def mousePressEvent(self, event):
        '''
        重写按下事件
        '''                             
        self.start_x = event.x()                        
        self.start_y = event.y()

    def mouseMoveEvent(self, event):
        '''
        重写移动事件
        '''                              
        dis_x = event.x() - self.start_x
        dis_y = event.y() - self.start_y
        self.move(self.x()+dis_x, self.y()+dis_y)

获取鼠标按下时的坐标位置(相对于窗口左上角)

当鼠标处于按下状态并开始移动时，鼠标离窗口左上角的位置会不断更新并保存在event.x()和event.y()中。
我们将更新后的x和y值不断减去鼠标按下时的坐标位置，就可以知道鼠标移动的距离。最后再调用move方法将窗口当前坐标加上移动距离即可

网速线程

class NetThread(QThread):
    net_signal = pyqtSignal(str,str)
    def __init__(self):
        super(NetThread,self).__init__()

    def net_func(self):
        parameter = psutil.net_io_counters()
        recv1 = parameter[1] #接收数据
        send1 = parameter[0] #上传数据
        time.sleep(1)  # 每隔1s监听端口接收数据
        parameter = psutil.net_io_counters()
        recv2 = parameter[1]
        send2 = parameter[0]
        self.upload_content = '{:.1f} kb/s.'.format((send2 - send1) / 1024.0)
        self.download_content = '{:.1f} kb/s.'.format((recv2 - recv1) / 1024.0)

    def run(self):
        while(1):
            self.net_func()
            self.net_signal.emit(self.upload_content,self.download_content)
            time.sleep(1)

全部代码

import sys
import time
import psutil

from PyQt5.QtWidgets import QApplication, QHBoxLayout, QMainWindow, QWidget, QFrame, QLabel, QVBoxLayout, QGridLayout
from PyQt5.QtCore import Qt, pyqtSignal, QThread
from PyQt5.QtGui import QPixmap
import res

class NetWindows(QMainWindow):
    net_signal = pyqtSignal(str,str)
    def __init__(self):
        super(NetWindows,self).__init__()
        self.ui_init()  
        self.thread_init()


    def ui_init(self):
        self.setWindowTitle('网速')
        self.resize(200,80)
        self.setWindowOpacity(0.9) # 设置窗口透明度
        self.setWindowFlag(Qt.FramelessWindowHint) # 隐藏边框
        self.setWindowFlag(Qt.WindowStaysOnTopHint) # 窗口始终显示在最前面
        self.upload_icon = QLabel()
        self.upload_icon.setPixmap(QPixmap(':res/upload.png'))
        self.upload_icon.setScaledContents(True)
        self.download_icon = QLabel()
        self.download_icon.setPixmap(QPixmap(':res/download.png'))
        self.download_icon.setScaledContents(True)
        self.upload_text = QLabel()
        self.upload_text.setText('upload: ')
        self.download_text = QLabel()
        self.download_text.setText('download: ')

        self.upload_lab = QLabel()
        self.download_lab = QLabel()

        self.g_layout = QGridLayout()
        self.g_layout.addWidget(self.upload_icon,0,0,1,1)
        self.g_layout.addWidget(self.download_icon,1,0,1,1)
        self.g_layout.addWidget(self.upload_text,0,1,1,1)
        self.g_layout.addWidget(self.download_text,1,1,1,1)
        self.g_layout.addWidget(self.upload_lab,0,2,1,4)
        self.g_layout.addWidget(self.download_lab,1,2,1,4)
        self.widget = QWidget()
        self.widget.setLayout(self.g_layout)
        self.setCentralWidget(self.widget)

    def thread_init(self):
        self.net_thread = NetThread()
        self.net_thread.net_signal.connect(self.net_slot)
        self.net_thread.start(1000)

    def variate_init(self):
        self.upload_content = ''
        self.download_content = ''

    def net_slot(self,upload_content,download_content):
        self.upload_lab.setText(upload_content)
        self.download_lab.setText(download_content)

    
    def mousePressEvent(self, event):
        '''
        重写按下事件
        '''                             
        self.start_x = event.x()                        
        self.start_y = event.y()

    def mouseMoveEvent(self, event):
        '''
        重写移动事件
        '''                              
        dis_x = event.x() - self.start_x
        dis_y = event.y() - self.start_y
        self.move(self.x()+dis_x, self.y()+dis_y)

class NetThread(QThread):
    net_signal = pyqtSignal(str,str)
    def __init__(self):
        super(NetThread,self).__init__()

    def net_func(self):
        parameter = psutil.net_io_counters()
        recv1 = parameter[1] #接收数据
        send1 = parameter[0] #上传数据
        time.sleep(1)  # 每隔1s监听端口接收数据
        parameter = psutil.net_io_counters()
        recv2 = parameter[1]
        send2 = parameter[0]
        self.upload_content = '{:.1f} kb/s.'.format((send2 - send1) / 1024.0)
        self.download_content = '{:.1f} kb/s.'.format((recv2 - recv1) / 1024.0)

    def run(self):
        while(1):
            self.net_func()
            self.net_signal.emit(self.upload_content,self.download_content)
            time.sleep(1)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    dispaly = NetWindows()
    dispaly.show()
    netwidows = NetWindows()
    sys.exit(app.exec_())

成果展示

在这里插入图片描述

在这里插入图片描述

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