ModelView::WheelEventFilter Class Reference

Event filter to install on combo boxes and spin boxes to ignore wheel events during scrolling. More...

Inheritance diagram for ModelView::WheelEventFilter:

Collaboration diagram for ModelView::WheelEventFilter:

Public Member Functions
	WheelEventFilter (QObject *parent=nullptr)

Protected Member Functions
bool	eventFilter (QObject *obj, QEvent *event)

Detailed Description

Event filter to install on combo boxes and spin boxes to ignore wheel events during scrolling.

Helpful than the spin box is a child of some larger scroll area.

Definition at line 41 of file customeventfilters.h.

Constructor & Destructor Documentation

WheelEventFilter()

WheelEventFilter::WheelEventFilter

(

QObject *

parent = nullptr

)

Definition at line 34 of file customeventfilters.cpp.

: QObject(parent) {}

Member Function Documentation

eventFilter()

bool WheelEventFilter::eventFilter ( QObject *  obj, QEvent *  event  )

protected

Definition at line 36 of file customeventfilters.cpp.

{
    if (auto spinBox = qobject_cast<QAbstractSpinBox*>(obj); spinBox) {
        if (event->type() == QEvent::Wheel) {
            if (spinBox->focusPolicy() == Qt::WheelFocus) {
                event->accept();
                return false;
            } else {
                event->ignore();
                return true;
            }
        } else if (event->type() == QEvent::FocusIn) {
            spinBox->setFocusPolicy(Qt::WheelFocus);
        } else if (event->type() == QEvent::FocusOut) {
            spinBox->setFocusPolicy(Qt::StrongFocus);
        }
 
    } else if (auto comboBox = qobject_cast<QComboBox*>(obj); comboBox) {
        if (event->type() == QEvent::Wheel) {
            event->ignore();
            return true;
        } else {
            event->accept();
            return false;
        }
    }
    return QObject::eventFilter(obj, event);
}

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The documentation for this class was generated from the following files:

• /home/www/ba/mvvm/viewmodel/mvvm/editors/customeventfilters.h
• /home/www/ba/mvvm/viewmodel/mvvm/editors/customeventfilters.cpp