PyQt5的学习之路(二)

图标

#! /usr/bin/python# -*- coding: utf-8 -*-import sysfrom PyQt5.QtWidgets import QApplication, QWidgetfrom PyQt5.QtGui import QIconclass Myform(QWidget):    def __init__(self):        super(Myform, self).__init__()        self.initUI()    def initUI(self):        # 前两个参数定位了窗口x轴,y轴的位置,效果等同于self.move(300, 300)        # 后两个参数确定了它的尺寸,效果等同于self.resize(300, 200)        self.setGeometry(300, 300, 300, 220)        self.setWindowTitle('Icon')        self.setWindowIcon(QIcon('/home/linux/1.jpg'))        self.show()if __name__ == '__main__':    app = QApplication(sys.argv)    w = Myform()    sys.exit(app.exec_())

tooltips

#! /usr/bin/python# -*- coding: utf-8 -*-import sysfrom PyQt5.QtWidgets import QWidget, QApplication, QToolTip, QPushButtonfrom PyQt5.QtGui import QFontclass Myform(QWidget):    def __init__(self):        super(Myform, self).__init__()        self.initUI()    def initUI(self):        QToolTip.setFont(QFont('SansSerif', 20))        self.setToolTip('This is a <b>QWidget</b> widget')      #设置窗口的提示内容        btn = QPushButton('Button', self)    # 按钮组件        btn.setToolTip('This is a <b>QPushButton</b> widget')      # 设置按钮的提示内容        btn.resize(btn.sizeHint())  # 设置组件为推荐大小        btn.move(0,0)       # 从内容开始移位        self.setGeometry(300, 300, 300, 300)        self.setWindowTitle('tips')        self.show()if __name__ == '__main__':    app = QApplication(sys.argv)    w = Myform()    sys.exit(app.exec_())

关闭按钮

#! /usr/bin/python# -*- coding: utf-8 -*-import sysfrom PyQt5.QtWidgets import QWidget, QApplication, QPushButtonfrom PyQt5.QtCore import QCoreApplicationclass Myform(QWidget):    def __init__(self):        super(Myform, self).__init__()        self.initUI()    def initUI(self):        qbtn = QPushButton('Quit', self)        # 信号&槽机制: clicked是信号,quit是槽(事件),QCoreApplication.instance()是事件对象        qbtn.clicked.connect(QCoreApplication.instance().quit)        qbtn.resize(qbtn.sizeHint())        qbtn.move(50, 50)        self.setGeometry(300, 300, 250, 150)        self.setWindowTitle('Quit button')        self.show()if __name__ == '__main__':    app = QApplication(sys.argv)    w = Myform()    sys.exit(app.exec_())

提示框

#!/usr/bin/python# -*- coding: utf-8 -*-import sysfrom PyQt5.QtWidgets import QWidget, QApplication, QMessageBoxclass Myform(QWidget):    def __init__(self):        super(QWidget, self).__init__()        self.initUI()    def initUI(self):        self.setGeometry(200, 200, 300, 300)        self.setWindowTitle('message box')        self.show()    # closeEvent的重新实现    def closeEvent(self, e):        # 参数从左到右: self, 提示窗口标题, 提示信息, 两个按钮, 默认选中        reply = QMessageBox.question(self, 'Message', 'Are you sure to quit?', QMessageBox.Yes | QMessageBox.No, QMessageBox.No)        if reply == QMessageBox.Yes:            e.accept()        else:            e.ignore()if __name__ == '__main__':    app = QApplication(sys.argv)    w = Myform()    sys.exit(app.exec_())

窗口居中

#!/usr/bin/python# -*- coding: utf-8 -*-import sysfrom PyQt5.QtWidgets import QWidget, QApplication, QDesktopWidgetclass Myform(QWidget):    def __init__(self):        super(Myform, self).__init__()        self.initUI()    def initUI(self):        self.resize(300, 300)        self.center()        self.setWindowTitle('居中对齐')        self.show()    def center(self):        qr = self.frameGeometry()        # 获得窗口框架        cp = QDesktopWidget().availableGeometry().center()     # 得到屏幕尺寸的中心位置        qr.moveCenter(cp)    #将框架的中心点移到之前获得的中心位置        self.move(qr.topLeft())      #将窗口移动到框架位置if __name__ == '__main__':    app = QApplication(sys.argv)    w = Myform()    sys.exit(app.exec_())