[FIXED] How to reimplement event and pass and argument to it using PySide

Issue

I am desperately trying to get the answer for a seems to be a very simple question. So, I have my main code which is a UI that has QTextEdit and I want to limit characters amount to 140. The best way, in my opinion, would be reimplementing keyPressEvent and KeyReleaseEvent functions.

To do that I am creating a class with my custom Text Edit widget:

class CustomTextEdit(QtWidgets.QTextEdit):
   def keyPressEvent(self, event, text):
       if len(text) > 140:
           return
       else:
           self.setText(text)

I don't need an event here. I only need to pass an argument that will hold the text that is already written in the text editor. However, when I try to create a QEditText and pass the current text by saying in my main UI:

self.text_edit = QtWidgets.CustomTextEdit()
self.text_edit.keyPressEvent(self.text_edit.toPlainText())

the program understands it as if I am passing an event which is a QKeyEvent and of course says that it doesn't have length.

What am I doing wrong? How to pass an event and an argument? Is it even possible?

I have been reading tones of answers to a similar question but still, don't get the answer. Please, help!

Solution

keyPressEvent can take only two arguments: self and event (named as you wish). To access the text already written in the editor you can use self.toPlainText() before accepting event with event.accept(). So, for your case to limit characters amount to 140 I would propose this workaround:

class CustomTextEdit(QWidgets.QTextEdit):
    def keyPressEvent(self, event):
        current_text = self.toPlainText()
        super().keyPressEvent(event)  # event.accept() is not working for me for some reasons
        if len(self.toPlainText()) > 140:
            self.setText(current_text)

Answered By - sanyassh