PyQT6 make verticalScrollBar() QWheelEvent scroll 1 row instead of 3-CodePudding

I have a QTableView with a verticalScrollBar()

The problem is that when I use the mouse wheel to scroll down/up it moves 3 rows at a time, I'd like to change this to only move 1 row at a time.

Looking at the class reference it seems to implement QWheelEvent,so my best guess is I must overwrite this event...however I have absolutely no idea where to start.

Any help would be much appreciated!

I'm using Python 3.10.5 and Pyqt 6.3 on Arch Linux (Manjaro)

CodePudding user response：

The QApplication class has the setWheelScrollLines method for setting this property globally. But if you only want it to affect one widget, you can create a subclass and utilise it in a reimplemented wheelEvent.

Here's a simple demo:

from PyQt6 import QtGui, QtWidgets

class TableView(QtWidgets.QTableView):
    def __init__(self):
        super().__init__()
        model = QtGui.QStandardItemModel(self)
        for row in range(100):
            model.appendRow(QtGui.QStandardItem())
        self.setModel(model)

    def wheelEvent(self, event):
        lines = QtWidgets.QApplication.wheelScrollLines()
        try:
            QtWidgets.QApplication.setWheelScrollLines(1)
            super().wheelEvent(event)
        finally:
            QtWidgets.QApplication.setWheelScrollLines(lines)
    
app = QtWidgets.QApplication(['Test'])
window = TableView()
window.show()
app.exec()