Disable or hide QLineEdit if one option from the QComboBox is active

TitoElan

Hi! It is my first day and I am trying to hide one QLineEdit while one option from the QComboBox is selected. I tried many things but without luck. Maybe can I get here some help.
Here is the code. I just want to hide the QLineEdit self.edit_winkel if the combobox is showing "Kehlnaht".

Thanks!

from operator import index
import sys
from cmath import pi
import math
from tkinter import E
from PySide6.QtWidgets import (QLineEdit, QPushButton, QApplication,
    QVBoxLayout, QDialog, QFontComboBox, QComboBox,QHBoxLayout,QLabel,QGridLayout,QGroupBox,QTextEdit)
from matplotlib import widgets

class Form(QDialog):

    def __init__(self, parent=None):
        super(Form, self).__init__(parent)
        # Create widgets
        self.edit_dicke = QLineEdit("")
        self.edit_V = QLineEdit("")
        self.edit_laenge = QLineEdit("")
        self.edit_winkel = QLineEdit("")
        self.button = QPushButton("Berechnen")
        self.label_dicke = QLabel("a [mm] = ")
        self.label_Naht = QLabel("Naht ")
        self.label_V = QLabel("V [mm] =  ")
        self.label_laenge = QLabel("L [m] =  ")
        self.label_winkel = QLabel("Winkel [°] =  ")
        self.combobox_Nahtselector = QComboBox()
        self.combobox_Nahtselector.addItem("Kehlnaht")
        self.combobox_Nahtselector.addItem("V-Naht")
        self.combobox_Nahtselector.addItem("HV-Naht")
        self.gb = QTextEdit()

        # Create layout and add widgets
        layout = QGridLayout()
        layout.addWidget(self.label_Naht,0,0)
        layout.addWidget(self.combobox_Nahtselector,0,2)
        layout.addWidget(self.label_dicke,1,0)
        layout.addWidget(self.edit_dicke,1,2)
        layout.addWidget(self.label_V,2,0)
        layout.addWidget(self.edit_V,2,2)
        layout.addWidget(self.label_winkel,3,0)
        layout.addWidget(self.edit_winkel,3,2)       
        layout.addWidget(self.label_laenge,4,0)
        layout.addWidget(self.edit_laenge,4,2)
        layout.addWidget(self.button,5,2)
        layout.addWidget(self.gb,6,0,6,3)

        
        # Set dialog layout
        self.setLayout(layout)


        # finding the content of current item in combo box
        content = self.combobox_Nahtselector.currentText()


        # self.combobox_Nahtselector.currentIndexChanged.connect(self.combobox)

    def currentIndexChanged(self):
        if self.combobox_Nahtselector.currentText == "Kehlnaht":
            self.edit_winkel.setEnabled(False)
        else:
            self.edit_winkel.setEnabled(True)


    

if __name__ == '__main__':
    # Create the Qt Application
    app = QApplication(sys.argv)
    # Create and show the form
    form = Form()
    form.show()
    # Run the main Qt loop
    sys.exit(app.exec())

JonB

@TitoElan said in Disable or hide QLineEdit if one option from the QComboBox is active:

    # finding the content of current item in combo box
    content = self.combobox_Nahtselector.currentText()


    # self.combobox_Nahtselector.currentIndexChanged.connect(self.combobox)

Hello and weclome.

The uncommented line won't help you, as it only tells you what the value is while you are inside __init__(). The commented line is indeed what you will need: connecting the signal to your slot. But aren't your parameters wrong? Don't you want:

self.combobox_Nahtselector.currentIndexChanged.connect(self.currentIndexChanged)

You connect the combobox's currentIndexChanged signal to a slot method you write, here Form's currentIndexChanged().

When that's working, you might rename def currentIndexChanged(self): to def combobox_NahtselectorCurrentIndexChanged(self) because that what it is a slot for and might make it clearer to you what is going on.

TitoElan

@JonB thanks! I'm not sure how, but it works now. I guess I need to read some documentation about the signals and slots. :D

JonB

@TitoElan said in Disable or hide QLineEdit if one option from the QComboBox is active:

I guess I need to read some documentation about the signals and slots. :D

Understatement! You won't get anywhere in Qt with understanding signal & slots. Read through https://doc.qt.io/qt-5/signalsandslots.html and https://wiki.qt.io/Qt_for_Python_Signals_and_Slots. For Python there are slight differences (syntax) between PyQt vs PySide, so decide which you are using.