import logging
from PyQt5.QtWidgets import QTextBrowser

# 設(shè)置全局的日志記錄格式和日志等級(jí)
logging.basicConfig(format="%(asctime)s %(name)s %(levelname)s %(message)s", level=logging.INFO)


class QTextBrowerHandler(logging.Handler):
    """
    接收一個(gè)接數(shù)text_browser，他是一個(gè)pyqt5的QTextBrowser控件，特征是不可編輯的文本框，適合用來記錄日志
    """

    def __init__(self, text_browser: QTextBrowser):
        super().__init__()
        self.text_browser = text_browser

        # 給此handler定義日志的格式
        formatter = logging.Formatter("%(asctime)s %(levelname)s %(message)s")
        self.setFormatter(formatter)

    def emit(self, record):
        """日志處理函數(shù)，格式化日志數(shù)據(jù)后，寫入到QTextBrower控件中"""
        msg = self.format(record)
        self.text_browser.append(msg)

# 創(chuàng)建一個(gè)logger實(shí)例，其他模塊引用該實(shí)例來記錄日志
logger = logging.getLogger()

from PyQt5.QtWidgets import QWidget, QTextBrowser, QFrame, QGridLayout, QLabel, QPushButton, QApplication
import time, sys
from logging_handler import logger, QTextBrowerHandler
import threading

class MyTest(QWidget):

    def __init__(self):
        super(MyTest, self).__init__()
        self.initUI()
        self.setWindowTitle('devops_it')
        self.setGeometry(300, 100, 800, 800)
        self.show()

    def initUI(self):
        self.page_frame = QFrame(self)
        self.grid = grid = QGridLayout(self.page_frame)
        self.setLayout(grid)

        # 配置各個(gè)控件，布局頁面
        log_label = QLabel('日志記錄')
        log_edit = QTextBrowser()
        log_bt = QPushButton('程序啟動(dòng)')
        log_bt.clicked.connect(self.log_print)

        # 將自定義的handler綁定QTextBrowser控件實(shí)例后，再綁定到logger實(shí)例上
        handler = QTextBrowerHandler(log_edit)
        logger.addHandler(handler)

        grid.addWidget(log_label, 0, 0)
        grid.addWidget(log_bt, 0, 1)
        grid.addWidget(log_edit, 1, 0)

    def log_print(self):
        """按鈕觸發(fā)的函數(shù)"""
        def func():
            for i in range(10):
                logger.info('我正在打印日志%s'%i)
                logger.info('我等待一秒')
                time.sleep(1)

        # 創(chuàng)建子線程，主線程不阻塞同步執(zhí)行指定函數(shù)
        added_thread = threading.Thread(target=func)
        added_thread.start()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = MyTest()
    sys.exit(app.exec_())