Esempio n. 1
0
QVariant MapObjectItem::itemChange(GraphicsItemChange change,
                                   const QVariant &value)
{
    if (!mSyncing) {
        MapRenderer *renderer = mMapDocument->renderer();

        if (change == ItemPositionChange
            && (QApplication::keyboardModifiers() & Qt::ControlModifier))
        {
            const QPointF pixelDiff = value.toPointF() - mOldItemPos;
            const QPointF newPixelPos =
                    renderer->tileToPixelCoords(mOldObjectPos) + pixelDiff;
            // Snap the position to the grid
            const QPointF newTileCoords =
                    renderer->pixelToTileCoords(newPixelPos).toPoint();

            return renderer->tileToPixelCoords(newTileCoords);
        }
        else if (change == ItemPositionHasChanged) {
            // Update the position of the map object
            const QPointF pixelDiff = value.toPointF() - mOldItemPos;
            const QPointF newPixelPos =
                    renderer->tileToPixelCoords(mOldObjectPos) + pixelDiff;
            mObject->setPosition(renderer->pixelToTileCoords(newPixelPos));
        }
    }

    return QGraphicsItem::itemChange(change, value);
}
Esempio n. 2
0
QVariant ResizeHandle::itemChange(GraphicsItemChange change,
                                  const QVariant &value)
{
    if (!mMapObjectItem->mSyncing) {
        MapRenderer *renderer = mMapObjectItem->mapDocument()->renderer();

        if (change == ItemPositionChange) {
            // Calculate the absolute pixel position
            const QPointF itemPos = mMapObjectItem->pos();
            QPointF pixelPos = value.toPointF() + itemPos;

            // Calculate the new coordinates in tiles
            QPointF tileCoords = renderer->pixelToTileCoords(pixelPos);
            const QPointF objectPos = mMapObjectItem->mapObject()->position();
            tileCoords -= objectPos;
            tileCoords.setX(qMax(tileCoords.x(), qreal(0)));
            tileCoords.setY(qMax(tileCoords.y(), qreal(0)));
            if (QApplication::keyboardModifiers() & Qt::ControlModifier)
                tileCoords = tileCoords.toPoint();
            tileCoords += objectPos;

            return renderer->tileToPixelCoords(tileCoords) - itemPos;
        }
        else if (change == ItemPositionHasChanged) {
            // Update the size of the map object
            const QPointF newPos = value.toPointF() + mMapObjectItem->pos();
            QPointF tileCoords = renderer->pixelToTileCoords(newPos);
            tileCoords -= mMapObjectItem->mapObject()->position();
            mMapObjectItem->resize(QSizeF(tileCoords.x(), tileCoords.y()));
        }
    }

    return QGraphicsItem::itemChange(change, value);
}