python多窗口切换

写在前面

实现方式:

  • QDialog
  • QWidget

switch

程序

基于QDialog的窗口切换 
import sys

from PyQt5.QtWidgets import QDialog, QWidget, QPushButton, QGridLayout, QLabel, QApplication


class A(QDialog):
    def __init__(self):
        super().__init__()

        button2menu = QPushButton("menu")
        button2menu.clicked.connect(self.toMenu)

        layout = QGridLayout()
        layout.addWidget(QLabel("A frame"))
        layout.addWidget(button2menu)
        self.setLayout(layout)

    def toMenu(self):
        self.frame = Menu()
        self.frame.show()
        self.close()


class B(QDialog):
    def __init__(self):
        super().__init__()

        button2menu = QPushButton("menu")
        button2menu.clicked.connect(self.toMenu)

        layout = QGridLayout()
        layout.addWidget(QLabel("B frame"))
        layout.addWidget(button2menu)
        self.setLayout(layout)

    def toMenu(self):
        self.frame = Menu()
        self.frame.show()
        self.close()


class Menu(QWidget):
    def __init__(self):
        super().__init__()

        button2a = QPushButton("to A")
        button2b = QPushButton("to B")
        button2a.clicked.connect(self.slotToA)
        button2b.clicked.connect(self.slotToB)

        layout = QGridLayout()
        layout.addWidget(button2a)
        layout.addWidget(button2b)

        self.setLayout(layout)

    def slotToA(self):
        self.frame = A()
        self.frame.show()
        self.close()

    def slotToB(self):
        self.frame = B()
        self.frame.show()
        self.close()


app = QApplication(sys.argv)
menu = Menu()
menu.show()
sys.exit(app.exec_())
基于QWidget的窗口切换

参考:

import sys

from PyQt5.QtCore import pyqtSignal
from PyQt5.QtWidgets import QWidget, QGridLayout, QPushButton, QLabel, QApplication


class A(QWidget):
    a_signal = pyqtSignal()

    def __init__(self):
        QWidget.__init__(self)
        ###############################################
        # A 页面布局 开始
        self.to_menu = QPushButton('menu')
        self.to_menu.clicked.connect(self.switch)

        layout = QGridLayout()
        layout.addWidget(QLabel("A frame"))
        layout.addWidget(self.to_menu)

        self.setLayout(layout)
        # A 页面布局 结束
        ###############################################

    def switch(self):
        self.a_signal.emit()


class B(QWidget):
    b_signal = pyqtSignal()

    def __init__(self):
        QWidget.__init__(self)
        ###############################################
        # B 页面布局 开始
        self.to_menu = QPushButton('menu')
        self.to_menu.clicked.connect(self.switch)

        layout = QGridLayout()
        layout.addWidget(QLabel("B frame"))
        layout.addWidget(self.to_menu)

        self.setLayout(layout)
        # B 页面布局 结束
        ###############################################

    def switch(self):
        self.b_signal.emit()


class Menu(QWidget):
    menu_signal_a = pyqtSignal()
    menu_signal_b = pyqtSignal()

    def __init__(self):
        QWidget.__init__(self)
        ###############################################
        # 主菜单布局 开始
        layout = QGridLayout()

        self.button_a = QPushButton('to A')
        self.button_a.clicked.connect(self.toA)

        self.button_b = QPushButton('to B')
        self.button_b.clicked.connect(self.toB)

        layout.addWidget(self.button_a)
        layout.addWidget(self.button_b)

        self.setLayout(layout)
        # 主菜单布局 结束
        ###############################################

    def toA(self):
        self.menu_signal_b.emit()

    def toB(self):
        self.menu_signal_a.emit()

# 窗口控制部分
class Control:

    def __init__(self):
        self.menu = Menu()
        self.b = B()
        self.a = A()

    def showMenu(self):
        self.menu.menu_signal_b.connect(self.showA)    # 信号量连接，menu->b
        self.menu.menu_signal_a.connect(self.showB)    # 信号量连接，mneu->a
        self.menu.show()    # pyqt5函数，显示

        self.b.close()    # pyqt5函数，关闭窗口
        self.a.close()    # pyqt5函数，关闭窗口

    def showB(self):
        self.b.b_signal.connect(self.showMenu)
        self.b.show()    # pyqt5函数，显示

        self.a.close()    # pyqt5函数，关闭窗口
        self.menu.close()    # pyqt5函数，关闭窗口

    def showA(self):
        self.a.a_signal.connect(self.showMenu)
        self.a.show()    # pyqt5函数，显示

        self.b.close()    # pyqt5函数，关闭窗口
        self.menu.close()    # pyqt5函数，关闭窗口


app = QApplication(sys.argv)
control = Control()
control.showMenu()
sys.exit(app.exec_())
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