[Solved] disable mouse wheel event on ComboBox

[fc_tofu]

I have seen some thread complaining about mouse wheel event on ComboBox control.
https://forum.freecadweb.org/viewtopic.php?f=3&t=45144

Till recent FreeCAD build (0.19.21049/win64 Conda) , this issue has not been solved. I'm not coder, and cannot fully understand the difficulty of this issue, but found this issue has got solved elsewhere on the net.

https://bugreports.qt.io/browse/QTBUG-48620
https://stackoverflow.com/questions/330 ... 7#46742557
https://doc.qt.io/qt-5/qml-qtquick-cont ... abled-prop
https://stackoverflow.com/questions/324 ... -qcombobox

[openBrain]

FreeCAD doesn't use Qt Quick.

[wmayer]

Code: Select all

from PySide2 import QtCore
from PySide2 import QtWidgets

class WheelEventFilter(QtCore.QObject):
    def eventFilter(self, obj, ev):
        if obj.inherits("QComboBox") and ev.type() == QtCore.QEvent.Wheel:
            return True
        return False


app = QtWidgets.QApplication.instance()
filter = WheelEventFilter()
app.installEventFilter(filter)

[fc_tofu]

FreeCAD doesn't use Qt Quick.

Thanks for correcting my naive mistake.

[fc_tofu]

Code: Select all

from PySide2 import QtCore
...

Thank you.
Is there a plan to merge this fix to main branch of FreeCAD?

[wmayer]

git commit c90db641881
In order to activate the filter you must create the boolean key ComboBoxWheelEventFilter in the group General and set it to true.

[fc_tofu]

git commit c90db641881
In order to activate the filter you must create the boolean key ComboBoxWheelEventFilter in the group General and set it to true.

Good news!

[fc_tofu]

git commit c90db641881
In order to activate the filter you must create the boolean key ComboBoxWheelEventFilter in the group General and set it to true.

Thank you @wmayer, I just tested the latest build.
It seems your fix has already worked in ComboBox and ListBox(?).

With ListBox (I donnot know its exact name), I mean below.
https://forum.freecadweb.org/viewtopic.php?f=3&t=45144

Above all, manual added parameter “ComboBoxWheelEventFilter” is a must.

Congratulations!

Code: Select all

OS: Windows 10 (10.0)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.21280 (Git)
Build type: Release
Branch: master
Hash: 6f3160db3e88733536c7eaf97ad7d6ebd21baccd
Python version: 3.8.2
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: Chinese/China (zh_CN)

[openBrain]

git commit c90db641881
In order to activate the filter you must create the boolean key ComboBoxWheelEventFilter in the group General and set it to true.

Newly introduced parameter is now documented in Fine-tuning

@wmayer : could you please extend the event filter to also return false on QAbstractSpinBox class ? Spin boxes suffer the same issue as combo boxes. Thx.

[fc_tofu]

@wmayer : could you please extend the event filter to also return false on QAbstractSpinBox class ? Spin boxes suffer the same issue as combo boxes. Thx.

With SpinBox, you mean below?

fsc_2020-06-03_152425.jpg (32.95 KiB) Viewed 2358 times