Introduction to the PyQt5 MenuBar control QMenuBar
QMenuBar is below the title bar of the QMainWindow object, and the horizontal QMenuBar is reserved for displaying the QMenu object.
QMenuBar class provides a QMenu object that can contain one or more QAction objects or cascade, to create a popup menu, Pyqt provides the createPopupMenu() function, the menuBar() function is used to return to the main window's QMenuBar object: the addMenu() function can add the menu to the menu bar, through the addAction () function can be added to the menu operation
Some important methods commonly used when designing menu systems
| methodologies | descriptive |
|---|---|
| menuBar() | Returns the QMenuBar object of the main window. |
| addMenu() | Add a new QMenu object to the menu bar |
| addAction() | Add an action button to the QMenu mini-control that contains text or an icon. |
| setEnabled() | Setting the action buttons to enable/disable |
| addSeperator() | Add a split line to the menu |
| clear() | Delete the contents of the menu bar |
| setShortcut() | Associating shortcuts to action buttons |
| setText() | Setting the text of menu items |
| setTitle() | Set the title of the QMenu widget |
| text() | Returns the text associated with the QACtion object |
| title() | Returns the title of the QMenu widget |
When any QAction button is clicked, the QMenu object emits the triggered signal
Example of using QMenuBar
import sys
from import *
from import *
from import *
class MenuDemo(QMainWindow):
def __init__(self,parent=None):
super(MenuDemo, self).__init__(parent)
# Horizontal Layout
layout=QHBoxLayout()
# Instantiate the main window's QMenuBar object
bar=()
# Add a new QMenu object to the menu bar, parent menu
file=('File')
# Add buttons, submenus to QMenu widgets
('New')
# Define responsive widget buttons and set shortcuts associated with action buttons to be added under parent menu
save=QAction('Save',self)
('Ctrl+S')
(save)
#Create new sub-menu item and add Sun menu
edit=('Edit')
('Copy')
('Paste')
#Add under the parent menu
quit=QAction('Quit',self)
(quit)
#Clicking on any Qmenu object emits a signal that binds the slot function
[QAction].connect()
#Setup Layout & Title
(layout)
('menu example')
def processtrigger(self,q):
# Output that the Qmenu object was clicked
print(()+'is triggeres')
if __name__ == '__main__':
app=QApplication()
demo=MenuDemo()
()
(app.exec_())
Run the program, the display effect is shown in Figure
QMenuBar code analysis
In this example, the top-level window must be a QMainWindow object to reference the QMenuBar object
Add the 'File' menu to the menu bar via the addMenu() method
bar=()
# Add a new QMenu object to the menu bar, parent menu
file=('File')
Action buttons in the menu bar can be strings or QAction objects
('New')
# Define responsive widget buttons and set shortcuts associated with action buttons to be added under parent menu
save=QAction('Save',self)
('Ctrl+S')
(save)
Adding submenus to the top level menu
edit=('Edit')
('Copy')
('Paste')
The menu emits the triggered signal, connecting the signal to the slot function processtrigger () The QAction object that accepts the signal
[QAction].connect()
This article explains in detail the use of PyQt5 menu bar control QMenuBar and examples, more about the use of PyQt5 menu bar control knowledge, please see the following related links