controller.py

from PyQt6.QtGui import QMouseEvent

from src.views.main import MainView


class MainController:

    def __init__(self, model: 'MainModel'):
        self.model = model
        self.view = MainView(self, self.model)

        self.view.show()

        # states
        self.old_pos = None

    def add_tab(self):
        print('add_tab')

    def show_maximized(self):
        if self.view.isMaximized():
            self.view.showNormal()
        else:
            self.view.showMaximized()

    def header_mouse_pressed(self, event: QMouseEvent):
        self.old_pos = event.globalPosition()

    def header_mouse_moved(self, event: QMouseEvent):
        delta = (event.globalPosition() - self.old_pos).toPoint()
        print("-------------------")
        print(self.view.x(), self.view.y())
        self.view.move(self.view.x() + delta.x(), self.view.y() + delta.y())
        self.old_pos = event.globalPosition()
        self.view.update()
        print(self.view.x(), self.view.y())

main.pyw

import sys

from PyQt6 import QtCore
from PyQt6.QtWidgets import QApplication, QStyleFactory

from src.models.main import MainModel
from src.controllers.main import MainController


def main():
    QApplication.setDesktopSettingsAware(False)
    app = QApplication(sys.argv)
    app.setStyle(QStyleFactory.create("Fusion"))

    QtCore.QDir.addSearchPath('icons', 'assets/window/icons')

    model = MainModel()
    controller = MainController(model)

    app.exec()


if __name__ == '__main__':
    sys.exit(main())

MainWindow.py

# Form implementation generated from reading ui file 'src/views/main/MainWindow.ui'
#
# Created by: PyQt6 UI code generator 6.5.0
#
# WARNING: Any manual changes made to this file will be lost when pyuic6 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt6 import QtCore, QtGui, QtWidgets


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        MainWindow.setStyleSheet("QMenuBar {\n"
                                 "    background-color: transparent;\n"
                                 "}\n"
                                 "\n"
                                 "QMenuBar::item {\n"
                                 "color : black;\n"
                                 "margin-top:4px;\n"
                                 "spacing: 3px;\n"
                                 "padding: 1px 10px;\n"
                                 "background: transparent;\n"
                                 "border-radius: 4px;\n"
                                 "}\n"
                                 "\n"
                                 "QMenuBar::item:selected {\n"
                                 "    color: rgb(247, 247, 247);\n"
                                 "background: #a8a8a8;\n"
                                 "}\n"
                                 "\n"
                                 "QMenuBar::item:pressed {\n"
                                 "background: #888888;\n"
                                 "}\n"
                                 "\n"
                                 "QMainWindow {\n"
                                 "    background-color: rgb(220, 226, 218);\n"
                                 "    border: none;\n"
                                 "}\n"
                                 "")
        self.centralwidget = QtWidgets.QWidget(parent=MainWindow)
        self.centralwidget.setContentsMargins(0, 0, 0, 0)
        self.centralwidget.setObjectName("centralwidget")
        self.centralwidget.setStyleSheet("""
        QWidget#centralwidget {
            background-color: rgb(220, 226, 218);
            border-top-right-radius: 10px;
            border-top-left-radius: 10px;
        }
        """)
        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setObjectName("verticalLayout")
        MainWindow.setCentralWidget(self.centralwidget)

        self.headerWidget = QtWidgets.QWidget(parent=self.centralwidget)
        self.headerWidget.setObjectName("headerWidget")
        self.headerWidget.setFixedHeight(25)
        self.headerWidget_layout = QtWidgets.QHBoxLayout(self.headerWidget)
        self.headerWidget.setLayout(self.headerWidget_layout)
        self.headerWidget_layout.setContentsMargins(0, 0, 0, 0)
        self.headerWidget_layout.setObjectName("headerWidget_layout")

        self.menubar = QtWidgets.QMenuBar(parent=self.headerWidget)
        self.menubar.setFocusPolicy(QtCore.Qt.FocusPolicy.NoFocus)
        self.menubar.setObjectName("menubar")
        self.helpMenu = QtWidgets.QMenu(parent=self.menubar)
        self.helpMenu.setObjectName("helpMenu")
        self.fileMenu = QtWidgets.QMenu(parent=self.menubar)
        self.fileMenu.setObjectName("fileMenu")
        self.headerWidget_layout.addWidget(self.menubar)
        self.headerWidget_layout.addStretch(1)
        self.windowTitle = QtWidgets.QLabel(parent=self.headerWidget)
        self.windowTitle.setObjectName("windowTitle")
        self.windowTitle.setStyleSheet("""
            QLabel {
                font-size: 10pt;
                font-weight: bold;
                text-align: center;
                background-color: rgb(255, 255, 255);
                border-radius: 5px;
                margin-top: 4px;
                margin-bottom: 2px;
                padding-left: 50px;
                padding-right: 50px;

            }
        """)
        self.windowTitle.setText("Title")
        self.windowTitle.setAlignment(QtCore.Qt.AlignmentFlag.AlignCenter)
        self.windowTitle.setMinimumWidth(300)
        self.windowTitle.setMaximumWidth(400)

        self.headerWidget_layout.addWidget(self.windowTitle)
        self.headerWidget_layout.addStretch(1)
        self.controlButtonsWidget = QtWidgets.QWidget(parent=self.headerWidget)
        self.controlButtonsWidget.setObjectName("controlButtonsWidget")
        self.controlButtonsWidget.setStyleSheet("""
            QWidget {
                background-color: rgb(255, 255, 255);
                border-radius: 5px;
                margin-top: 4px;
                margin-bottom: 0px;
                margin-right: 5px;
                
                padding-left: 5px;
                padding-right: 5px;
            }
        """)
        self.controlButtonsWidget_layout = QtWidgets.QHBoxLayout(self.controlButtonsWidget)
        self.controlButtonsWidget.setLayout(self.controlButtonsWidget_layout)
        self.controlButtonsWidget_layout.setContentsMargins(1, 1, 1, 1)

        self.controlButtonsWidget_layout.setObjectName("controlButtonsWidget_layout")

        self.minimizeButton = QtWidgets.QToolButton(parent=self.controlButtonsWidget)
        self.minimizeButton.setFixedSize(25, 25)
        self.minimizeButton.setIcon(QtGui.QIcon("icons:minimize.png"))
        self.minimizeButton.setObjectName("minimizeButton")
        self.minimizeButton.setStyleSheet("""
            QToolButton {
                background-color: rgb(255, 255, 255);
                border: none;
            }
            QToolButton:hover {
                background-color: rgb(230, 230, 230);
            }
        """)
        self.controlButtonsWidget_layout.addWidget(self.minimizeButton)
        self.maximizeButton = QtWidgets.QToolButton(parent=self.controlButtonsWidget)
        self.maximizeButton.setFixedSize(25, 25)
        self.maximizeButton.setIcon(QtGui.QIcon("icons:expand.png"))
        self.maximizeButton.setObjectName("maximizeButton")
        self.maximizeButton.setStyleSheet("""
            QToolButton {
                background-color: rgb(255, 255, 255);
                border: none;
            }
            QToolButton:hover {
                background-color: rgb(230, 230, 230);
            }
        """)
        self.controlButtonsWidget_layout.addWidget(self.maximizeButton)
        self.closeButton = QtWidgets.QToolButton(parent=self.controlButtonsWidget)
        self.closeButton.setFixedSize(25, 25)
        self.closeButton.setIcon(QtGui.QIcon("icons:close.png"))
        self.closeButton.setObjectName("closeButton")
        self.closeButton.setStyleSheet("""
            QToolButton {
                background-color: rgb(255, 255, 255);
                border: none;
            }
            QToolButton:hover {
                background-color: rgb(230, 230, 230);
            }
        """)
        self.controlButtonsWidget_layout.addWidget(self.closeButton)
        self.headerWidget_layout.addWidget(self.controlButtonsWidget)

        self.centralwidget.layout().addWidget(self.headerWidget)
        self.centralwidget.layout().addItem(
            QtWidgets.QSpacerItem(0, 15, QtWidgets.QSizePolicy.Policy.Fixed, QtWidgets.QSizePolicy.Policy.Fixed))
        self.aboutProgram = QtGui.QAction(parent=MainWindow)
        self.aboutProgram.setObjectName("aboutProgram")
        self.action_2 = QtGui.QAction(parent=MainWindow)
        self.action_2.setObjectName("action_2")
        self.open = QtGui.QAction(parent=MainWindow)
        self.open.setObjectName("open")
        self.save_as = QtGui.QAction(parent=MainWindow)
        self.save_as.setObjectName("save_as")
        self.new_file = QtGui.QAction(parent=MainWindow)
        self.new_file.setObjectName("new_file")
        self.close = QtGui.QAction(parent=MainWindow)
        self.close.setObjectName("close")
        self.exit = QtGui.QAction(parent=MainWindow)
        self.exit.setObjectName("exit")
        self.settings = QtGui.QAction(parent=MainWindow)
        self.settings.setObjectName("settings")
        self.helpMenu.addAction(self.aboutProgram)
        self.fileMenu.addAction(self.new_file)
        self.fileMenu.addAction(self.open)
        self.fileMenu.addAction(self.save_as)
        self.fileMenu.addSeparator()
        self.fileMenu.addAction(self.settings)
        self.fileMenu.addAction(self.close)
        self.fileMenu.addSeparator()
        self.fileMenu.addAction(self.exit)
        self.menubar.addAction(self.fileMenu.menuAction())
        self.menubar.addAction(self.helpMenu.menuAction())

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "CompMath"))
        self.helpMenu.setTitle(_translate("MainWindow", "Справка"))
        self.fileMenu.setTitle(_translate("MainWindow", "Файл"))
        self.aboutProgram.setText(_translate("MainWindow", "О СompMath"))
        self.action_2.setText(_translate("MainWindow", "Язык"))
        self.open.setText(_translate("MainWindow", "Открыть..."))
        self.save_as.setText(_translate("MainWindow", "Сохранить как"))
        self.new_file.setText(_translate("MainWindow", "Новый..."))
        self.close.setText(_translate("MainWindow", "Закрыть"))
        self.exit.setText(_translate("MainWindow", "Выход"))
        self.settings.setText(_translate("MainWindow", "Настройки"))

view.py

from PyQt6 import QtGui, QtWidgets
from PyQt6.QtCore import Qt
from PyQt6.QtGui import QRegion, QPainter, QColor, QGuiApplication
from PyQt6.QtWidgets import QMainWindow

from src.utils.observer import DObserver
from src.utils.ts_meta import TSMeta
from src.views.main.MainWindow import Ui_MainWindow
from src.models.main import MainModel
from src.widgets.tabwidget import TabContainer


class MainView(QMainWindow, DObserver, metaclass=TSMeta):

    def __init__(self, controller, model: MainModel, parent=None):
        super(QMainWindow, self).__init__(parent)
        self.controller = controller
        self.model = model

        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)
        tab_widget = TabContainer()
        self.ui.centralwidget.layout().addWidget(tab_widget)
        self.setWindowFlag(Qt.WindowType.FramelessWindowHint, True)
        self.setAttribute(Qt.WidgetAttribute.WA_TranslucentBackground, True)

        # Регистрация представлений
        self.model.add_observer(self)

        # События
        self.ui.closeButton.clicked.connect(self.close)
        self.ui.close.triggered.connect(self.close)
        self.ui.minimizeButton.clicked.connect(self.showMinimized)
        self.ui.maximizeButton.clicked.connect(self.controller.show_maximized)
        self.ui.headerWidget.mousePressEvent = self.controller.header_mouse_pressed
        self.ui.headerWidget.mouseMoveEvent = self.controller.header_mouse_moved

    def model_changed(self):
        pass