Items selection by mouse rectangle with map not facing north

[JaiPasdeBol]

Hi,

I noticed a very little problem that I think I solved. When you select items by drawing a rectangle with the SHIFT key pushed: it works perfectly when the map is north oriented. But it doesn't really well when your map is oriented at 45° for exemple. (The rectangle we use for the selection isn't oriented correctly) So I had this method in QGVMap class:

QList<QGVDrawItem*> QGVMap::search(const QPolygonF& projPolygon, Qt::ItemSelectionMode mode) const
{
    QList<QGVDrawItem*> result;
    for (QGraphicsItem* item : geoView()->scene()->items(projPolygon, mode)) {
        QGVDrawItem* geoObject = QGVMapQGItem::geoObjectFromQGItem(item);
        if (geoObject)
            result << geoObject;
    }
    return result;
}

And I add some code in QGVMapQGView::selectObjectsByRect(QMouseEvent* event, QRect selRect)

void QGVMapQGView::selectObjectsByRect(QMouseEvent* event, QRect selRect)
{
    if (!mMouseActions.testFlag(QGV::MouseAction::Selection)) {
        changeState(QGV::MapState::Idle);
        return;
    }
    event->accept();
    if (event->modifiers() == Qt::ShiftModifier) {
        mGeoMap->unselectAll();
    }
    const QRectF projSelRect = QRectF(mapToScene(selRect.topLeft()), mapToScene(selRect.bottomRight()));
    //Construction of the polygon
    QPolygonF projSelPolygon;
        projSelPolygon<<mapToScene(selRect.topLeft());
        projSelPolygon<<mapToScene(selRect.bottomRight());
    QPointF centreRect((selRect.topLeft().x()+selRect.bottomRight().x())/2,(selRect.topLeft().y()+selRect.bottomRight().y())/2.);
    QPolygonF projSelPolygon2 = QTransform().rotate(-mAzimuth).translate(-centreRect.x(),-centreRect.y()).map(projSelPolygon);
    projSelPolygon.clear();
    projSelPolygon<<projSelPolygon2[0];
    projSelPolygon<<QPointF(projSelPolygon2[1].x(),projSelPolygon2[0].y());
    projSelPolygon<<projSelPolygon2[1];
    projSelPolygon<<QPointF(projSelPolygon2[0].x(),projSelPolygon2[1].y());
    projSelPolygon = QTransform().translate(centreRect.x(),centreRect.y()).rotate(mAzimuth).map(projSelPolygon);

    auto selList = mGeoMap->search(projSelPolygon, Qt::ContainsItemShape);
    for (auto* geoObject : selList) {
        geoObject->setSelected(!geoObject->isSelected());
    }
}

I think it works fine with this, but you may have a better solution. Thanks for your work on this library.