QPixmapCache::Key Class
class QPixmapCache::KeyThe QPixmapCache::Key class can be used for efficient access to the QPixmapCache. More...
Public Functions
Related Non-Members
(since 6.6) size_t | qHash(const QPixmapCache::Key &key, size_t seed = 0) |
Detailed Description
Use QPixmapCache::insert() to receive an instance of Key generated by the pixmap cache. You can store the key in your own objects for a very efficient one-to-one object-to-pixmap mapping.
Member Function Documentation
Key::Key()
Constructs an empty Key object.
[noexcept] Key::~Key()
Destroys the key.
[noexcept] bool Key::isValid() const
Returns true if there is a cached pixmap associated with this key. Otherwise, if pixmap was flushed, the key is no longer valid.
[noexcept] void Key::swap(QPixmapCache::Key &other)
Swaps this key with other. This operation is very fast and never fails.
Related Non-Members
[noexcept, since 6.6] size_t qHash(const QPixmapCache::Key &key, size_t seed = 0)
Returns the hash value for the key, using seed to seed the calculation.
This function was introduced in Qt 6.6.
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