Selection of text in QTextBrowser using mousePressEvent() and mouseReleaseEvent()

Question

I have a QTextBrowser and I want to select a part of the text inside, I need the position of the start and the end of the selection. I want to do that with mousePressEvent and mouseReleaseEvent. Here is my code,

class MainWindow(QMainWindow, TeamInsight.Ui_MainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setupUi(self)
    def set_text(self):
        self.textBrowser.setText('test strings are here')

textBrowser is inside a MainWindow. How do I implement mousePressEvent and mouseReleaseEvent for text in textBrowser

Answer 1

If you want to track events and you can not overwrite the class, the solution is to install an event filter, in your case, just the MouseButtonRelease event, we must filter the viewport() of the QTextBrowser:

import sys

from PyQt5.QtCore import QEvent
from PyQt5.QtWidgets import QMainWindow, QApplication

import TeamInsight


class MainWindow(QMainWindow, TeamInsight.Ui_MainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setupUi(self)
        self.browserInput.viewport().installEventFilter(self)
        self.browserInput.setText("some text")

    def eventFilter(self, obj, event):
        if obj is self.browserInput.viewport():
            if event.type() == QEvent.MouseButtonRelease:
                if self.browserInput.textCursor().hasSelection():
                    start = self.browserInput.textCursor().selectionStart()
                    end = self.browserInput.textCursor().selectionEnd()
                    print(start, end)
            elif event.type() == QEvent.MouseButtonPress:
                print("event mousePressEvent")
        return QMainWindow.eventFilter(self, obj, event)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())