CODEWITHSUNDEEP
pythonpyqt5
downbydawn
downbydawn

Reputation: 67

how to pass the value of textbox outside of the window PyQt5

I'm getting to know PyQt5. I am trying to pass a string entered into a textbox to the Python file to work with. The string is saved in b1_output and supposed to be changed and printed after the window is closed. However I don't know how to access it. During the first print() instance in my code it will print the old value. At the second instance it won't print at all. Thanks for your help!

My Code:

from PyQt5.QtWidgets import *
import sys

class MyWindow(QMainWindow):
    b1_output = 'example'

    def __init__(self):
        QMainWindow.__init__(self)
        self.win_width = 750
        self.win_heigth = 150
        self.leftmargin = 50
        self.topmargin = 50
        #self.width = 300
        #self.height = 400
        self.title = 'Title'
        self.initUI()

    def initUI(self):
        # create window
        self.setGeometry(50,50,self.win_width,self.win_heigth)
        self.setWindowTitle(self.title)
        self.label = QLabel(self)

        # create textbox
        self.textbox = QLineEdit(self)
        self.textbox.resize((self.win_width-self.label.width()-150),20)
        self.textbox.move(self.label.width()+100, 50)

        # create button
        self.b1 = QPushButton(self)
        self.b1.setText('Go do magic!')
        self.b1.move(self.win_width-self.b1.width()-50,100)
        self.b1.clicked.connect(self.clicked)

    def clicked(self):
        self.b1_output = self.textbox.text()
        self.update()
        self.close()

    def update(self):
        self.label.adjustSize()


app = QApplication(sys.argv)
win = MyWindow()

print(win.b1_output)

win.show()
sys.exit(app.exec_())

print(win.b1_output)

Upvotes: 0

Views: 102

Answers (1)

eyllanesc
eyllanesc

Reputation: 244132

The goal of sys.exit() is to terminate the program so all code after that line will never be executed. The solution is to use sys.exit() after printing:

app = QApplication(sys.argv)
win = MyWindow()

print(win.b1_output)

win.show()
ret = app.exec_()

print(win.b1_output)

sys.exit(ret)

Upvotes: 2

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