2024年3月13日发(作者:)
class CustomItem : public QGraphicsItem
{
public:
enum { Type = UserType + 1 };
int type() const override
{
// Enable the use of qgraphicsitem_cast with this item.
return Type;
}
...
};
qvariant_cast QVariant类型转换为实际的类型
Returns the given value converted to the template type T.
This function is equivalent to ().
等等...
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