Method resizeEvent

gui/qt/keypad/keypadwidget.cpp:322–329

}

void KeypadWidget::resizeEvent(QResizeEvent *event) {
    QSize size{sBaseRect.size().scaled(event->size(), Qt::KeepAspectRatio)},
        origin{(event->size() - size) / 2};
    mTransform.setMatrix(static_cast<qreal>(size.width()) / sBaseRect.width(), 0, 0, 0,
                         static_cast<qreal>(size.height()) / sBaseRect.height(), 0,
                         origin.width(), 0, 1);
    mInverseTransform = mTransform.inverted();
}

void KeypadWidget::paintEvent(QPaintEvent *event) {
    QRegion region{mInverseTransform.map(event->region())};