Key Class

class QPixmapCache::Key

The QPixmapCache::Key class can be used for efficient access to the QPixmapCache. More...

This class was introduced in Qt 4.6.

Public Functions

bool isValid() const

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


Constructs an empty Key object.


Destroys the key.

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 Otherwise, if pixmap was flushed, the key is no longer valid.

This function was introduced in Qt 5.7.