{"id":5092,"date":"2022-09-28T09:33:00","date_gmt":"2022-09-28T09:33:00","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=5092"},"modified":"2022-10-10T02:46:06","modified_gmt":"2022-10-10T02:46:06","slug":"pyqt-qmainwindow","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/pyqt\/pyqt-qmainwindow\/","title":{"rendered":"PyQt QMainWindow"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn how to use the PyQt QMainWindow to create the main window of an application.<\/p>\n\n\n\n

Introduction to the PyQt QMainWindow #<\/a><\/h2>\n\n\n\n

So far, you have learned how to use QWidget<\/code><\/code> to create the main window for applications. The QWidget<\/code><\/code> works fine for simple applications but doesn’t support common features of full-blown desktop applications like menu bars, toolbars, and status bars.<\/p>\n\n\n\n

PyQt provides you with QMainWindow<\/code><\/code> that support a menu bar, toolbars, and status bar out of the box. So instead of subclassing the QWidget<\/code> class, you can create the main window by inheriting it from the QMainWindow<\/code><\/code> class like this:<\/p>\n\n\n

class<\/span> MainWindow<\/span>(QMainWindow)<\/span>:<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
PyQt divides the QMainWindow<\/code> widget into some sections as shown in the following picture: <\/p>\n\n\n\n
\"QMainWindow<\/figure>\n\n\n\n
Note that you should not set a layout for the QMainWindow<\/code>. If you do so, you’ll break the preset arrangement of the widgets.<\/p>\n\n\n\n
Set the central widget #<\/a><\/h3>\n\n\n\n
A QMainWindow<\/code><\/code> has one and only one central widget. To set a widget as a central widget, you use the setCentralWidget()<\/code> method of the QMainWindow<\/code><\/code> object. <\/p>\n\n\n\n
For example, the following uses the setCentralWidget()<\/code> method to set the QTextEdit<\/a><\/code> as the central widget:<\/p>\n\n\n
self.setCentralWidget(QTextEdit())<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Set the window title #<\/a><\/h3>\n\n\n\n
To set the title for the main window, you use the setWindowTitle()<\/code> method. For example:<\/p>\n\n\n
self<\/span>.setWindowTitle('Editor'<\/span>)<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
Set the window icon  #<\/a><\/h3>\n\n\n\n
To set the icon for the window, you use the setWindowIcon()<\/code> method. For example:<\/p>\n\n\n
 self<\/span>.setWindowIcon(QIcon('.\/assets\/editor.png'<\/span>))<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
In this example: <\/p>\n\n\n\n