PyQt 创建自定义QWidget

|-- main.py
|-- res
|   `-- fish.jpg
`-- ui
    `-- app_widget.py

import sys

from PyQt5.QtWidgets import QApplication

from ui.app_widget import AppQWidget

if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = AppQWidget()
    w.show()

    sys.exit(app.exec_())

from PyQt5.QtCore import QCoreApplication
from PyQt5.QtGui import QIcon
from PyQt5.QtWidgets import QWidget, QPushButton, QDesktopWidget, QMessageBox


class AppQWidget(QWidget):
    """
    A custom QWidget by Rust Fisher
    """

    def __init__(self):
        super().__init__()
        self.init_ui()

    def init_ui(self):
        # self.setGeometry(300, 300, 400, 200)  # 相当于move和resize
        self.resize(300, 200)
        self.move_to_center()
        self.setWindowTitle('Demo1')
        self.setWindowIcon(QIcon('res/fish.jpg'))

        btn1 = QPushButton('Quit', self)
        btn1.setToolTip('Click to quit')
        btn1.resize(btn1.sizeHint())
        btn1.move(200, 150)
        btn1.clicked.connect(QCoreApplication.instance().quit)  # cannot locate function connect

    def closeEvent(self, event):
        reply = QMessageBox.question(self, 'Message',
                                     'Are you sure to quit now?',
                                     QMessageBox.Yes | QMessageBox.No,
                                     QMessageBox.No)
        if reply == QMessageBox.Yes:
            event.accept()
        else:
            event.ignore()

    def move_to_center(self):
        qr = self.frameGeometry()
        cp = QDesktopWidget().availableGeometry().center()  # got center info here
        qr.moveCenter(cp)
        self.move(qr.topLeft())  # 应用窗口的左上方的点到qr矩形的左上方的点，因此居中显示在我们的屏幕上

    # 同组的控件可以存在同一个list中
    self.cb_list = [
        self.ma.i2cCB,
        self.ma.mipiCB,
        self.ma.eepromCB,
        self.ma.tem_sensorCB,
        self.ma.lensCB,
        self.ma.vcmCB,
        self.ma.mirrorCB,
        self.ma.mirrorCaliCB, ]

    self.test_count_et_list = [
        self.ma.i2cCountEt,
        self.ma.mipiCountEt,
        self.ma.eepromCountEt,
        self.ma.tem_sensorCountEt,
        self.ma.lensCountEt,
        self.ma.vcmCountEt,
        self.ma.mirrorCountEt,
        self.ma.mirrorCaliCountEt,
    ]

# 需要操作某组控件时  直接遍历列表
def _click_test_item_cb(self):
    """ Update [choose all checkbox] by all test item state """
    choose_all = True
    for cb in self.cb_list:
        choose_all = choose_all & cb.isChecked()
    self.ma.selecteAllCB.setChecked(choose_all)

>>> QtGui.QWidget()
QWidget: Must construct a QApplication before a QPaintDevice

class RustMainWindow(QMainWindow):
    """ This is the main class """

    def _trigger_english(self):
        print "Change to English", QApplication.instance()

# Change to English <PyQt4.QtGui.QApplication object at 0x02ABE3A0>

if __name__ == '__main__':
    app = QApplication(sys.argv)
    # 这里把app交给了MainWindow，MainWindow关闭时是无法正常退出应用的
    main_d = RustMainWindow(app)  # 不建议这么做
    main_d.show()
    sys.exit(app.exec_())