PyQt6中QMainWindow组件的使用详解

import sys

from PyQt6.QtCore import Qt
from PyQt6.QtGui import QAction
from PyQt6.QtWidgets import *


class AppMainWindow(QMainWindow):
    def __init__(self):
        super(AppMainWindow, self).__init__()

        self.setWindowTitle("QMainWindow 案例")
        self.resize(800, 600)

        # 中央区域
        self.init_central()
        # 菜单栏
        self.init_menubar()
        # 工具栏
        self.init_toolbar()
        # 状态栏
        self.init_statusbar()
        # 停靠窗口
        self.init_dock()

        # 信号-槽
        self.init_signal()

    def init_central(self):
        self.central_label = QLabel("我是中央部件")
        self.setCentralWidget(self.central_label)

    def init_menubar(self):
        menubar = self.menuBar()
        # 创建菜单
        file_menu = menubar.addMenu("文件")
        # 添加菜单项
        exit_action = QAction("退出", self)
        exit_action.triggered.connect(self.close)
        file_menu.addAction(exit_action)


    def init_toolbar(self):
        tool_bar = QToolBar("工具栏")

        # 添加工具到工具栏
        exit_action = QAction("退出",self)
        exit_action.triggered.connect(self.close)
        tool_bar.addAction(exit_action)

        self.addToolBar(tool_bar)

    def init_statusbar(self):
        status_bar = QStatusBar()
        status_bar.showMessage("这是一个状态栏")
        self.setStatusBar(status_bar)

    def init_dock(self):
        dock_widget = QDockWidget("停留窗口", self)
        self.list_widget = QListWidget()
        for i in range(5):
            item = QListWidgetItem(f'item {i}')
            self.list_widget.addItem(item)
        dock_widget.setWidget(self.list_widget)
        self.addDockWidget(Qt.DockWidgetArea.LeftDockWidgetArea, dock_widget)

    def init_signal(self):
        # 双击 listwidget内容
        self.list_widget.itemDoubleClicked.connect(self.show_central_msg)

    def show_central_msg(self):
        current_item = self.list_widget.currentItem()

        if current_item.text():
            self.central_label.setText(current_item.text())



if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = AppMainWindow()
    window.show()
    sys.exit(app.exec())