PyQt6 Desktop App Template

 This demo program shows how to create a splash screen that calls a login screen and upon logging calls a MDI window complete with menu bar, toolbars, status bar and context menu and the MDI window calls a child window.

The output:

The code:

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from PyQt6.QtWidgets import * from PyQt6.QtCore import * from PyQt6.QtGui import * from PyQt6 import QtCore, QtGui, QtWidgets, uic import sys import time class SplashScreen(QWidget): def __init__(self): super().__init__() self.setFixedSize(700, 350) self.setWindowFlag(Qt.WindowType.FramelessWindowHint) self.setAttribute(Qt.WidgetAttribute.WA_TranslucentBackground) self.counter = 0 self.n = 100 self.initUI() self.timer = QTimer() self.timer.timeout.connect(self.loading) self.timer.start(30) def initUI(self): # layout to display splash scrren frame layout = QVBoxLayout() self.setLayout(layout) # splash screen frame self.frame = QFrame() layout.addWidget(self.frame) # splash screen title self.title_label = QLabel(self.frame) self.title_label.setObjectName('title_label') self.title_label.resize(690, 120) self.title_label.move(0, 5) # x, y self.title_label.setText('Your World Famous App') self.title_label.setAlignment(Qt.AlignmentFlag.AlignCenter) # splash screen title description self.description_label = QLabel(self.frame) self.description_label.resize(690, 40) self.description_label.move(0, self.title_label.height()) self.description_label.setObjectName('desc_label') self.description_label.setText('<b>We build the systems and the apps.</b>') self.description_label.setAlignment(Qt.AlignmentFlag.AlignCenter) # splash screen pogressbar self.progressBar = QProgressBar(self.frame) self.progressBar.resize(self.width() - 200 - 10, 50) self.progressBar.move(100, 180) # self.description_label.y()+130 self.progressBar.setAlignment(Qt.AlignmentFlag.AlignCenter) self.progressBar.setFormat('%p%') self.progressBar.setTextVisible(True) self.progressBar.setRange(0, self.n) self.progressBar.setValue(20) # spash screen loading label self.loading_label = QLabel(self.frame) self.loading_label.resize(self.width() - 10, 50) self.loading_label.move(0, self.progressBar.y() + 70) self.loading_label.setObjectName('loading_label') self.loading_label.setAlignment(Qt.AlignmentFlag.AlignCenter) self.loading_label.setText('Loading...') def loading(self): # set progressbar value self.progressBar.setValue(self.counter) # stop progress if counter # is greater than n and # display main window app if self.counter >= self.n: self.timer.stop() self.close() time.sleep(1) self.WindowApp = WindowApp() self.WindowApp.show() self.counter += 1 class WindowApp(QMainWindow): def __init__(self): super().__init__() self.setWindowTitle("Login") self.setFixedSize(320, 245) self.move(400, 200) self.quit = QAction("Quit", self) self.quit.triggered.connect(self.closeEvent) lblusr = QLabel('UserName', self) lblusr.setStyleSheet('QLabel {background-color: transparent; color: black;}') lblusr.setGeometry(25, 55, 100, 30) txtusr = QLineEdit(' ', self) txtusr.setGeometry(100, 55, 150, 30) lblpwd = QLabel('Password', self) lblpwd.setStyleSheet('QLabel {background-color: transparent; color: black;}') lblpwd.setGeometry(25, 100, 100, 30) txtpwd = QLineEdit(' ', self) txtpwd.setGeometry(100, 100, 150, 30) pblogin = QPushButton('Login', self) pblogin.setGeometry(100, 165, 65, 25) pblogin.clicked.connect(self.onClick_pb3) pbcanc = QPushButton('Cancel', self) pbcanc.setGeometry(180, 165, 65, 25) pbcanc.clicked.connect(self.onClick_pb4) self.show() def closeEvent(self, event): close = QMessageBox() close.setIcon(QMessageBox.Icon.Question) close.setWindowTitle('Pls confirm') close.setStyleSheet('QLabel {background-color: transparent; color: black;}') close.setText("Do you really want to quit?") close.setStandardButtons(QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.Cancel) close = close.exec() if close == QMessageBox.StandardButton.Yes: event.accept() else: event.ignore() def onClick_pb3(self): self.w = Window2() self.w.show() self.hide() def onClick_pb4(self): self.quit self.close() class Window2(QMainWindow): count = 0 def __init__(self): super().__init__() self.mdi = QMdiArea() self.setCentralWidget(self.mdi) self.quit = QAction("Quit", self) self.quit.triggered.connect(self.closeEvent) self.toolbar = QToolBar("Documents") self.toolbar.setMovable(False) toolbar1 = QToolBar("Messages") self.toolbar.setIconSize(QSize(30,30)) toolbar1.setIconSize(QSize(30,30)) self.addToolBar(self.toolbar) self.new_action = QAction(QIcon(r"c:\crud\icons\document--plus.png"), "&New", self) self.new_action.setStatusTip("New Document") self.new_action.triggered.connect(self.onNewClick) #button_action.setCheckable(True) self.new_action.setShortcut(QKeySequence("Ctrl+p")) chg_action = QAction(QIcon(r"c:\crud\icons\document--pencil.png"), "&Change", self) chg_action.setStatusTip("Change Document") chg_action.triggered.connect(self.onClick) chg_action.setCheckable(True) self.toolbar.addAction(self.new_action) self.toolbar.addAction(chg_action) self.addToolBar(toolbar1) inbox_action = QAction(QIcon(r"c:\crud\icons\inbox--plus.png"), "&Add Message", self) inbox_action.setStatusTip("Add Message") inbox_action.triggered.connect(self.onClick) inbox_action.setCheckable(True) inbox_action.setShortcut(QKeySequence("Ctrl+m")) inbox_action1 = QAction(QIcon(r"c:\crud\icons\inbox--minus.png"), "&Remove Message", self) inbox_action1.setStatusTip("Remove Message") inbox_action1.triggered.connect(self.onClick) inbox_action1.setCheckable(True) inbox_action1.setShortcut(QKeySequence("Ctrl+n")) exit_action = QAction(QIcon(r"c:\crud\icons\door-open-out.png"), "&Exit", self) exit_action.setStatusTip("Exit") exit_action.triggered.connect(self.onExitClick) exit_action.setShortcut(QKeySequence("Ctrl+x")) toolbar1.addAction(inbox_action) toolbar1.addAction(inbox_action1) self.statusBar = QStatusBar() self.setStatusBar(self.statusBar) self.statusBar.showMessage("Ready", 3000) menu = self.menuBar() file_menu = menu.addMenu("&File") file_menu.addAction(self.new_action) file_menu.addAction(chg_action) file_menu.addSeparator() file_submenu = file_menu.addMenu("Messages") file_submenu.addAction(inbox_action) file_submenu.addAction(inbox_action1) file_menu.addSeparator() file_menu.addAction(exit_action) bar = self.menuBar() file = bar.addMenu("Window") file.addAction("Cascade") file.addAction("Tile") file.triggered[QAction].connect(self.click) tb = bar.addMenu("Toolbar") tb.addAction("Hide Documents Toolbar") tb.addAction("Unhide Documents Toolbar") tb.triggered[QAction].connect(self.click) tb1 = bar.addMenu("System") tb1.addAction("About This Template") tb1.triggered[QAction].connect(self.about) self.setWindowTitle("The App System") def closeEvent(self, event): close = QMessageBox() close.setIcon(QMessageBox.Icon.Question) close.setWindowTitle('Pls confirm') close.setStyleSheet('QLabel {background-color: transparent; color: black;}') close.setText("Do you really want to quit?") close.setStandardButtons(QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.Cancel) close = close.exec() if close == QMessageBox.StandardButton.Yes: event.accept() else: event.ignore() def contextMenuEvent(self, event): menu = QMenu(self) menu.addAction(self.new_action) menu.exec(event.globalPos()) def onClick(self, s): print("click",s) def onExitClick(self, s): self.quit self.close() def about(self, s): aboutm = QMessageBox() aboutm.setIcon(QMessageBox.Icon.Information) aboutm.setWindowTitle('Software Information') aboutm.setStyleSheet('QLabel {background-color: transparent; color: black;}') aboutm.setText("Title: Simple App Template \n Version: 1.00 \n Release Date: April 19, 2022") aboutm.setStandardButtons(QMessageBox.StandardButton.Ok) aboutm = aboutm.exec() def onNewClick(self, s): Window2.count = Window2.count+1 sub = QMdiSubWindow() lbl1a = QLabel('RECS', sub) lbl1a.setGeometry(25, 75, 50, 35) lbl1a.setStyleSheet('QLabel {background-color: #0E95A6; color: #d4d4d4;}') lbl1a.setAlignment(Qt.AlignmentFlag.AlignCenter) sub.setGeometry(25, 25, 200, 200) sub.setWindowTitle("subwindow"+str(Window2.count)) self.mdi.addSubWindow(sub) sub.show() def click(self, q): if q.text() == "Cascade": self.mdi.cascadeSubWindows() if q.text() == "Tile": self.mdi.tileSubWindows() if q.text() == "Hide Documents Toolbar": self.toolbar.toggleViewAction().setChecked(True) self.toolbar.toggleViewAction().trigger() if q.text() == "Unhide Documents Toolbar": self.toolbar.toggleViewAction().setChecked(False) self.toolbar.toggleViewAction().trigger() app = QApplication(sys.argv) app.setStyleSheet(''' #title_label { font-size: 50px; color: #F0B21A; } #desc_label { font-size: 15px; color: #F0B21A; } #loading_label { font-size: 20px; color: #F0B21A; } QFrame { background-color: #2F339B; color: #c8c8c8; } QProgressBar { background-color: #000000; color: #9B2F6A; border-style: none; border-radius: 5px; text-align: center; font-size: 25px; } QProgressBar::chunk { border-radius: 7px; background-color: qlineargradient(spread:pad x1:0, x2:1, y1:0.511364, y2:0.523, stop:0 #E1F01A); } ''') splash = SplashScreen() splash.show() sys.exit(app.exec())