customeventfilters.cpp

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//  ************************************************************************************************
//
//  qt-mvvm: Model-view-view-model framework for large GUI applications
//
//! @file      mvvm/viewmodel/mvvm/editors/customeventfilters.cpp
//! @brief     Implements class CLASS?
//!
//! @homepage  http://www.bornagainproject.org
//! @license   GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2020
//! @authors   Gennady Pospelov et al, Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
//  ************************************************************************************************
 
#include "mvvm/editors/customeventfilters.h"
#include <QAbstractSpinBox>
#include <QComboBox>
#include <QEvent>
 
using namespace ModelView;
 
LostFocusFilter::LostFocusFilter(QObject* parent) : QObject(parent) {}
 
bool LostFocusFilter::eventFilter(QObject* obj, QEvent* event)
{
    if (event->type() == QEvent::FocusOut)
        return true;
 
    return QObject::eventFilter(obj, event);
}
 
// ----------------------------------------------------------------------------
 
WheelEventFilter::WheelEventFilter(QObject* parent) : QObject(parent) {}
 
bool WheelEventFilter::eventFilter(QObject* obj, QEvent* event)
{
    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);
}