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[править] Obsolete Members for QPixmapCache

The following class members are obsolete. They are provided to keep old source code working. We strongly advise against using them in new code.

• QPixmapCache class reference

[править] Статические открытые члены

• QPixmap * find ( const QString & key ) (obsolete)

[править] Описание функций-членов

[править]

QPixmap * QPixmapCache::find ( const QString & key ) [static]

This is an overloaded member function, provided for convenience.

Returns the pixmap associated with the key in the cache, or null if there is no such pixmap.

Warning: If valid, you should copy the pixmap immediately (this is fast). Subsequent insertions into the cache could cause the pointer to become invalid. For this reason, we recommend you use find(const QString&, QPixmap&) instead.

Example:

 QPixmap* pp;
 QPixmap p;
 if ((pp=QPixmapCache::find("my_big_image", pm))) {
     p = *pp;
 } else {
     p.load("bigimage.png");
     QPixmapCache::insert("my_big_image", new QPixmap(p));
 }
 painter->drawPixmap(0, 0, p);