QVariant PixmapItem::itemChange(GraphicsItemChange change,
const QVariant &value)
{
if (change == ItemPositionChange)
{
// value is the new position.
QPointF newPos = value.toPointF();
QRectF rect = parentItem()->boundingRect();
rect.moveLeft(boundingRect().width()*3/4*-1);
rect.setWidth(rect.width() + boundingRect().width()*2/4 );
rect.moveTop(boundingRect().height()*3/4*-1);
rect.setHeight(rect.height() + boundingRect().height()*2/4 );
CardItem *card = qgraphicsitem_cast<CardItem *>(parentItem());
if (!rect.contains(newPos))
{
// Keep the item inside the scene rect.
int newX = (int)qMin(rect.right(), qMax(newPos.x(), rect.left()));
int newY = (int)qMin(rect.bottom(), qMax(newPos.y(), rect.top()));
if(card->isAlign())
{
int gridSize = card->getGridSize();
newX = (newX/(10*gridSize))*(10*gridSize);
newY = (newY/(10*gridSize))*(10*gridSize);
}
newPos.setX(newX);
newPos.setY(newY);
return newPos;
}
else
{
int newX = newPos.x();
int newY = newPos.y();
if(card->isAlign())
{
int gridSize = card->getGridSize();
newX = newPos.x()/(10*gridSize);
newX = newX * (10*gridSize);
newY = newPos.y()/(10*gridSize);
newY = newY*(10*gridSize);
}
newPos.setX(newX);
newPos.setY(newY);
return newPos;
}
}
return QGraphicsItem::itemChange(change, value);
}
