PyQt5【入门-窗口】

一.窗口

#设置窗口标题
 setWindowTitle("标题")

#设置窗口坐标和大小
setGeometry(0,0,800,600)

 """
 项目模块: PyQt5
 项目内容:窗口

 """
 #导入系统参数
 import sys

 #导入PyQt5
 from PyQt5.QtGui import *
 from PyQt5.QtWidgets import *

 #定义类
 class MyWidget(QWidget):

     def __init__(self):     #类的初始化

         super().__init__()  #super()继承

         self.setGeometry(,,,)  #设置坐标:   大小800 

         self.setWindowTitle('窗口标题')

 #类的实例化
 myapp = QApplication(sys.argv)

 mywidget = MyWidget()

 mywidget.show()

 sys.exit(myapp.exec_())

二.界面加上图标

 """
 项目模块: PyQt5
 项目内容:窗口

 """
 #导入系统参数
 import sys

 #导入PyQt5
 from PyQt5.QtGui import *
 from PyQt5.QtWidgets import *

 #定义类
 class MyWidget(QWidget):

     def __init__(self):     #类的初始化

         super().__init__()  #super()继承

         self.setGeometry(0,0,800,600)  #设置坐标: 0 0 大小800 600

         self.setWindowTitle('窗口标题')

         self.setWindowIcon(QIcon('i.ico'))  #添加图标

 #类的实例化
 myapp = QApplication(sys.argv)

 mywidget = MyWidget()

 mywidget.show()

 sys.exit(myapp.exec_())

三.弹出提示信息

 """
 项目模块: PyQt5
 项目内容:窗口

 """
 #导入系统参数
 import sys

 #导入PyQt5
 from PyQt5.QtGui import *
 from PyQt5.QtWidgets import *

 #定义类
 class MyWidget(QWidget):

     def __init__(self):     #类的初始化

         super().__init__()  #super()继承

         self.setGeometry(0,0,800,600)  #设置坐标: 0 0 大小800 600

         self.setWindowTitle('窗口标题')

         self.setWindowIcon(QIcon('i.ico'))

         #设置提示信息
         self.setToolTip("这是提示!!")

         QToolTip.setFont(QFont('微软雅黑',10))

 #类的实例化
 myapp = QApplication(sys.argv)

 mywidget = MyWidget()

 mywidget.show()

 sys.exit(myapp.exec_())

四.关闭窗口询问

 """
 项目模块: PyQt5
 项目内容:窗口

 """
 #导入系统参数
 import sys

 #导入PyQt5
 from PyQt5.QtGui import *
 from PyQt5.QtWidgets import *

 #定义类
 class MyWidget(QWidget):

     def __init__(self):     #类的初始化

         super().__init__()  #super()继承

         self.setGeometry(0,0,800,600)  #设置坐标: 0 0 大小800 600

         self.setWindowTitle('窗口标题')

         self.setWindowIcon(QIcon('i.ico'))

     def closeEvent(self,event):  

         #重新定义 closeEvent

         replay = QMessageBox.question(self,'关闭',
                                       "你确定要退出么?",
                                       QMessageBox.Yes,
                                       QMessageBox.No)
         if replay == QMessageBox.Yes:

             event.accept()
         else:
             event.ignore()

 #类的实例化
 myapp = QApplication(sys.argv)

 mywidget = MyWidget()

 mywidget.show()

 sys.exit(myapp.exec_())

五.屏幕居中显示

 """
 项目模块: PyQt5
 项目内容:窗口

 """
 #导入系统参数
 import sys

 #导入PyQt5
 from PyQt5.QtGui import *
 from PyQt5.QtWidgets import *

 #定义类
 class MyWidget(QWidget):

     def __init__(self):     #类的初始化

         super().__init__()  #super()继承

         self.setGeometry(0,0,800,600)  #设置坐标: 0 0 大小800 600

         self.resize(200,200)

         self.setWindowTitle('窗口标题')

         self.setWindowIcon(QIcon('i.ico'))

         self.center()

     def closeEvent(self,event):

         #重新定义 closeEvent

         replay = QMessageBox.question(self,'关闭',
                                       "你确定要退出么?",
                                       QMessageBox.Yes,
                                       QMessageBox.No)
         if replay == QMessageBox.Yes:

             event.accept()
         else:
             event.ignore()

     def center(self):

         #获取屏幕的大小
         screen = QDesktopWidget().screenGeometry()
         #自身的大小(包括宽和高)
         size = self.geometry()
         self.move((screen.width() - size.width())/2,\
                   (screen.height() - size.height())/2)

 #类的实例化
 myapp = QApplication(sys.argv)

 mywidget = MyWidget()

 mywidget.show()

 sys.exit(myapp.exec_())

六.状态栏

 """
 项目模块: PyQt5
 项目内容:窗口

 """
 #导入系统参数
 import sys

 #导入PyQt5
 from PyQt5.QtGui import *
 from PyQt5.QtWidgets import *

 #定义类
 class MyWidget(QMainWindow):

     def __init__(self):     #类的初始化

         super().__init__()  #super()继承

         self.setGeometry(0,0,800,600)  #设置坐标: 0 0 大小800 600

         self.resize(300,300)

         self.setWindowTitle('窗口标题')

         self.setWindowIcon(QIcon('i.ico'))

         self.center()

         self.status_bar()

     def closeEvent(self,event):

         #重新定义 closeEvent

         replay = QMessageBox.question(self,'关闭',
                                       "你确定要退出么?",
                                       QMessageBox.Yes,
                                       QMessageBox.No)
         if replay == QMessageBox.Yes:

             event.accept()
         else:
             event.ignore()

     def center(self):

         #获取屏幕的大小
         screen = QDesktopWidget().screenGeometry()
         #自身的大小(包括宽和高)
         size = self.geometry()
         self.move((screen.width() - size.width())/2,\
                   (screen.height() - size.height())/2)

     def status_bar(self):

         self.statusBar().showMessage("程序已准备就绪...")

 #类的实例化
 myapp = QApplication(sys.argv)

 mywidget = MyWidget()

 mywidget.show()

 sys.exit(myapp.exec_())

七.菜单栏

 """
 项目模块: PyQt5
 项目内容:窗口

 """
 #导入系统参数
 import sys

 #导入PyQt5
 from PyQt5.QtGui import *
 from PyQt5.QtWidgets import *

 #定义类
 class MyWidget(QMainWindow):

     valueA = "about"
     valueB = "aboutqt"

     def __init__(self):     #类的初始化

         super().__init__()  #super()继承

         self.initUI()

     def initUI(self):
         self.setGeometry(0,0,800,600)  #设置坐标: 0 0 大小800 600

         self.resize(300,300)

         self.setWindowTitle('窗口标题')

         self.setWindowIcon(QIcon('i.ico'))

         self.center()

         self.menu_bar()

     def menu_bar(self):

         #=================编程语言=========================
         lauguage_machine = self.menuBar().addMenu("编程语言")
         lauguage_C = lauguage_machine.addAction("C/C++")
         lauguage_Python = lauguage_machine.addAction("Python")
         lauguage_C# = lauguage_machine.addMenu("C#")
         lauguage_PHP = lauguage_machine.addAction("PHP")
         lauguage_SQL = lauguage_machine.addMenu("SQL")
         #SQL添加分支
         relative_SQL = lauguage_SQL.addMenu("关系型数据库")
         NoSQL = lauguage_SQL.addMenu("非关系型数据库")
         #关系型数据库
         SQL_Oracle = relative_SQL.addAction("Oracle")
         SQL_DB2 = relative_SQL.addAction("DB2")
         SQL_MySQL = relative_SQL.addAction("MySQL")
         SQL_Access = relative_SQL.addAction("Access")
         SQL_Server = relative_SQL.addAction("SQL Server")
         SQL_Sybase = relative_SQL.addAction("Sybase")
         SQL_vft = relative_SQL.addAction("vfp")
         SQL_INGRES = relative_SQL.addAction("INGRES")
         #非关系型数据库
         SQL_SQL = NoSQL.addAction("SQL")
         SQL_Redis = NoSQL.addAction("Redis")
         SQL_MongoDB = NoSQL.addAction("MongoDB")
         SQL_SQLite = NoSQL.addAction("SQLite")
         #网页
         lauguag_Web = lauguage_machine.addMenu("网页")
         lauguag_HTML = lauguag_Web.addAction("HTML")
         lauguag_CSS = lauguag_Web.addAction("CSS")
         lauguag_JavaScript = lauguag_Web.addAction("JavaScript")

         #=================爬虫=========================
         menu_control = self.menuBar().addMenu('爬虫')

         act_quit = menu_control.addAction('quit')

         act_quit.triggered.connect(self.close)

         #==================Web===================
         menu_help = self.menuBar().addMenu('Web')

         act_about = menu_help.addAction('about')

         act_about.triggered.connect(self.status)

         act_aboutqt = menu_help.addAction('aboutqt')

         act_aboutqt.triggered.connect(self.status_bar)

     def closeEvent(self,event):

         #重新定义 closeEvent

         replay = QMessageBox.question(self,'关闭',
                                       "你确定要退出么?",
                                       QMessageBox.Yes,
                                       QMessageBox.No)
         if replay == QMessageBox.Yes:

             event.accept()
         else:
             event.ignore()

     def center(self):

         #获取屏幕的大小
         screen = QDesktopWidget().screenGeometry()
         #自身的大小(包括宽和高)
         size = self.geometry()
         self.move((screen.width() - size.width())/2,\
                   (screen.height() - size.height())/2)

     def status_bar(self):

         self.statusBar().showMessage("打开")

     def status(self):

         self.statusBar().showMessage("关闭")

 #类的实例化
 myapp = QApplication(sys.argv)

 mywidget = MyWidget()

 mywidget.show()

 sys.exit(myapp.exec_())