How to write code to get the name/current text of a menu item?

sdf1444

Hi

So below is the code and in there is a variable "self.fileName_UI =" but it is for getting the text for a combo box. I want it to be changed so that it gets the text for a menu item. I am not sure how to write this.

Thanks

import paho.mqtt.client as mqtt
import os
import sys
import PyQt5
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5 import QtWidgets, uic, QtCore
from mqtt import *
import json
import time

if hasattr(QtCore.Qt, 'AA_EnableHighDpiScaling'):
	PyQt5.QtWidgets.QApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling, True)
if hasattr(QtCore.Qt, 'AA_UseHighDpiPixmaps'):
	PyQt5.QtWidgets.QApplication.setAttribute(QtCore.Qt.AA_UseHighDpiPixmaps, True)

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self,parent = None):
        QMainWindow.__init__(self)
        super(MainWindow, self).__init__(parent)
        self.mdi = QMdiArea()
        self.setCentralWidget(self.mdi)

        self.setMinimumSize(QSize(800, 600))
        self.setWindowTitle("PyQt button example - pythonprogramminglanguage.com")

        client = device()
        client.run()

        client.loop_start()
        print("Connected to broker")
        time.sleep(1)
        print("Subscribing to topic", "microscope/light_sheet_microscope/UI/devices")
        client.subscribe("microscope/light_sheet_microscope/UI/devices")
        print("Publishing message to topic", "microscope/light_sheet_microscope/UI/devices")
        client.publish("microscope/light_sheet_microscope/UI/devices", json.dumps({"type": "system", "payload":{"cmd": "get all devices"}}, indent=2))
        time.sleep(1)
        
        pybutton = QPushButton('Add device', self)

        pybutton.clicked.connect(self.importbutton)

        pybutton.move(100, 400)
        pybutton.resize(150, 32)
        # pybutton.hide()

        self.combo = QComboBox(self)        
        self.combo.move(100,350)
        self.combo.resize(100, 32)
        # self.combo.hide()                        

        menubar = self.menuBar()
        fileMenu = menubar.addMenu('Devices')

        def readFile(fname):
            try:
                with open(fname, "r") as f:
                    for item in f:
                        deviceImport = fileMenu.addAction(item)
                        deviceImport.triggered.connect(self.importbutton)       

                        # self.combo.addItem(item, self.importbutton)
            except:
                print("No devices active")
        readFile("list_of_device(s)_currently_active.txt") 
    
    def importbutton(self):
        if not os.path.exists("laser.ini"):
            client = device()
            client.run()

            client.loop_start()
            print("\n" + "Connected to broker")
            time.sleep(1)
            print("Subscribing to topic", "microscope/light_sheet_microscope/UI/add device")
            client.subscribe("microscope/light_sheet_microscope/UI/add device")
            print("Publishing message to topic", "microscope/light_sheet_microscope/UI/add device")
            client.publish("microscope/light_sheet_microscope/UI/add device", json.dumps({"type": "system", "payload":{"cmd": "init device panel"}}, indent=2))
            time.sleep(1)
            client.loop_stop()        
            self.fileName_UI = self.combo.currentText()
            self.loadGUI()
            print("Device panel initialised" + "\n")
        else:
            if os.path.exists("laser.ini"):
                client = device()
                client.run()

                client.loop_start()
                print("\n" + "Connected to broker")
                time.sleep(1)
                print("Subscribing to topic", "microscope/light_sheet_microscope/UI/laser")
                client.subscribe("microscope/light_sheet_microscope/UI/laser")
                print("Publishing message to topic", "microscope/light_sheet_microscope/UI/laser")
                client.publish("microscope/light_sheet_microscope/UI/laser", json.dumps({"type": "device", "payload":{"name": "laser", "cmd": "set config"}}, indent=2))
                time.sleep(1)
                client.loop_stop()
                self.fileName_UI = self.combo.currentText()
                self.loadGUI()
                print("Laser config set" + "\n")

    def loadGUI(self):
        module = __import__(self.fileName_UI.rstrip("\n"))
        my_class = getattr(module, "SubWindow")
        
        sub = QMdiSubWindow()
        
        sub.setWidget(my_class())
        sub.setWindowTitle(self.fileName_UI)
        self.mdi.addSubWindow(sub)
        sub.show()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    mainWin = MainWindow()
    mainWin.show()
    # publishedMessage = mainWin.getGUIFilename()
    sys.exit(app.exec_())

jsulm

@sdf1444 Simply use https://doc.qt.io/qt-5/qobject.html#objectName-prop to get object name as already suggested.
Like:

self.combo.objectName()

sdf1444

@jsulm

But I thought "self.combo" refers to a combo box and not a menu item?

SGaist

Hi,

You have to adapt to your code. You know where that menu is accessible.

sdf1444

@SGaist

Yes but not sure about the rest.

SGaist

What rest ? @jsulm already provided information.

And what is exactly the goal of getting the name of the menu ?

sdf1444

@SGaist

"self.combo.objectName()" doesnt work within my code. I need a way to get text of a menu item because the menu item refers to a python file in my current directory that I want to import.

Thanks

jsulm

@sdf1444 Do you want the text or object name?
You should be more clear.
https://doc.qt.io/qt-5/qmenu.html#title-prop

SGaist

To add to @jsulm, since you are talking about menu item, you likely are looking for the QAction::text property.

JonB

@sdf1444

self.combo.objectName()" doesnt work within my code. I need a way to get text of a menu item

Which is why @VRonin originally replied to you

The name can be extracted from the objectName property of the QAction that represents the menu item. The text is the same but uses the text property

To be clear, your code does not seem to use a QAction anywhere, I think you need to read up on that whole class (https://doc.qt.io/qt-5/qaction.html).

But now I am getting confused. Sometimes you talk about menu, which we are taking as a QMenu, and sometimes you talk about a combobox, QCombobox. I'm wondering whether by "menu" you mean a combobox, but I'm not sure....

sdf1444

@SGaist

When I mention "menu" I mean QMenu.

JonB

@sdf1444
OK. So where you go fileMenu.addAction(item) it's that QAction you need to call text() on to retrieve its text at a later date, which I believe is what you are asking.

Just as P.S.: the device names you're reading from file won't have an & in them, will they?

Pablo J. Rogina

@sdf1444 as mentioned before what you need is the QAction::text property.
And given that you're connecting lots of QAction objects (the items in your "Devices" menu) to the same slot, see below:

for item in f:
deviceImport = fileMenu.addAction(item)
deviceImport.triggered.connect(self.importbutton)

then in the slot you need to identify the signal sender to get a reference to the proper QAction, and get its text value (the device name you're looking for...). Something like this (code not tested)

def importbutton(self):
    sender = self.sender()
    selectedDevice = sender.text()
...

Look for code snippet eventsource.py in this example about signals & slots.

sdf1444

@Pablo-J-Rogina

Thank you so much!! This has worked for me.

Pablo J. Rogina

@sdf1444 said in How to write code to get the name/current text of a menu item?:

This has worked for me.

Ok, so:
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