Hello,

I am currently using PyQt5 with Python3.
I'm having trouble getting a QTabWidget to be placed inside the main screen when called from a separate class.
Currently when the button "single" from the view menu option is selected a QTabWidget is produced but in a seperate window from my QMainWindow widget.
I believe the issue lies in my OOP but I was hoping for some input or direction to documentation that could provide me with a solution.

The structure is as follows:

__main__.py

Qt Code: 
  1. mainscreen.App()
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mainwindow.py

Qt Code: 
  1. class App(QMainWindow):
  2. 	def __init__(self): 
  3. 		appl = QApplication(sys.argv)
  4.  
  5. 		super().__init__() #is this line necessary
  6. 		self.title = "PyQt EVE-Application"
  7. 		self.showMaximized()
  8. 		self.initUI()
  9.  
  10. 		sys.exit(appl.exec_())
  11.  
  12. 	def menu(self):
  13. 		mainMenu = self.menuBar()
  14. 		fileMenu = mainMenu.addMenu('File')
  15. 		openMenu = mainMenu.addMenu('Open')
  16. 		viewMenu = mainMenu.addMenu('View')
  17. 		helpMenu = mainMenu.addMenu('Help')
  18.  
  19. 		#FILE
  20. 		exitButton = QAction('Exit', self)
  21. 		exitButton.setShortcut('Ctrl + E')
  22. 		exitButton.setStatusTip('Exit application')
  23. 		exitButton.triggered.connect(self.close)
  24. 		fileMenu.addAction(exitButton)
  25.  
  26. 		#OPEN
  27.  
  28. 		#VIEW
  29. 		singleview = QAction('Single View', self)
  30. 		singleview.setShortcut ('Ctrl + S')
  31. 		singleview.setStatusTip('Change view to one widget.')
  32. 		singleview.triggered.connect(self.singlecall)
  33. 		viewMenu.addAction(singleview)
  34.  
  35.  
  36. 		# doubleview
  37. 		doubleview = QAction('Double View', self)
  38. 		doubleview.setShortcut('Ctrl + D')
  39. 		doubleview.setStatusTip('Change view to two wigets.')
  40. 		doubleview.triggered.connect(widgetviews.double)
  41. 		viewMenu.addAction(doubleview)
  42.  
  43.  
  44. 		# tripleview
  45. 		tripleview = QAction('Triple View', self)
  46. 		tripleview.setShortcut('Ctrl + T')
  47. 		tripleview.setStatusTip('Change view to three widgets.')
  48. 		tripleview.triggered.connect(widgetviews.triple)
  49. 		viewMenu.addAction(tripleview)
  50.  
  51. 		# quadview
  52. 		quadview = QAction('Quad View', self)
  53. 		quadview.setShortcut('Ctrl + Q')
  54. 		quadview.setStatusTip('Change view to four widgets.')
  55. 		quadview.triggered.connect(widgetviews.quad)
  56. 		viewMenu.addAction(quadview)
  57. 		#HELP
  58. 	def singlecall(self):
  59. 		self.t = widgetviews.single(self)
  60. 		self.t.show()
  61.  
  62. 	def initUI(self):
  63. 		self.setWindowTitle(self.title)
  64. 		self.menu()
  65. 		#default to quad view
  66. 		self.show()
  67. if __name__ == "__main__":
  68. 	pass
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tabwidget.py

Qt Code: 
  1. class single(QWidget):
  2. 	def __init__(self, App):
  3. 		super().__init__()
  4.  
  5. 		App.blankwidget = QWidget()
  6. 		App.tab1 = QTabWidget()
  7. 		App.tab1.addTab(App.blankwidget, "Tab 1")
  8. 		App.tab2 = QTabWidget()
  9. 		App.tab3 = QTabWidget()
  10. 		App.tab4 = QTabWidget()
  11.  
  12. 		grid = QGridLayout()
  13. 		grid.addWidget(App.tab1,0,0)
  14. 		grid.addWidget(App.tab2,0,1)
  15. 		grid.addWidget(App.tab3,1,0)
  16. 		grid.addWidget(App.tab4,1,1)
  17. 		self.setLayout(grid)
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Thank you in Advance