QPixmapCache::Key Class Reference

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

#include <qpixmapcache.h>

Public Functions
	Key ()
	Constructs an empty Key object. More...
	Key (const Key &other)
	Constructs a copy of other. More...
bool	operator!= (const Key &key) const
Key &	operator= (const Key &other)
bool	operator== (const Key &key) const
	Returns true if this key is the same as the given key; otherwise returns false. More...
	~Key ()
	Destroys the key. More...

Properties
KeyData *	d

Friends
class	QPixmapCache
class	QPMCache

Detailed Description

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

Since

4.6

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.

Definition at line 61 of file qpixmapcache.h.

Constructors and Destructors

Key() [1/2]

QPixmapCache::Key::Key

(

)

Constructs an empty Key object.

Definition at line 119 of file qpixmapcache.cpp.

                     : d(0)
{
}

Key() [2/2]

QPixmapCache::Key::Key

(

const Key &

other

)

Constructs a copy of other.

Warning

This function is not part of the public interface.

Definition at line 130 of file qpixmapcache.cpp.

{
    if (other.d)
        ++(other.d->ref);
    d = other.d;
}

~Key()

QPixmapCache::Key::~Key

(

)

Destroys the key.

Definition at line 140 of file qpixmapcache.cpp.

{
    if (d && --(d->ref) == 0)
        delete d;
}

Functions

operator!=()

bool QPixmapCache::Key::operator!= ( const Key &  key ) const

inline

Warning

This function is not part of the public interface.

Definition at line 68 of file qpixmapcache.h.

        { return !operator==(key); }

operator=()

QPixmapCache::Key & QPixmapCache::Key::operator=

(

const Key &

other

)

Warning

This function is not part of the public interface.

Definition at line 168 of file qpixmapcache.cpp.

{
    if (d != other.d) {
        if (other.d)
            ++(other.d->ref);
        if (d && --(d->ref) == 0)
            delete d;
        d = other.d;
    }
    return *this;
}

operator==()

bool QPixmapCache::Key::operator==

(

const Key &

key

)

const

Returns true if this key is the same as the given key; otherwise returns false.

Warning

This function is not part of the public interface.

Definition at line 155 of file qpixmapcache.cpp.

{
    return (d == key.d);
}

Friends and Related Functions

QPixmapCache

friend class QPixmapCache

friend

Definition at line 75 of file qpixmapcache.h.

QPMCache

friend class QPMCache

friend

Definition at line 74 of file qpixmapcache.h.

Properties

d

KeyData* QPixmapCache::Key::d

private

Definition at line 73 of file qpixmapcache.h.

Referenced by QPMCache::clear(), QPixmapCache::find(), QPMCache::get(), QPMCache::getKeyData(), QPMCache::insert(), Key(), QPMCache::object(), operator=(), operator==(), QPMCache::releaseKey(), QPixmapCache::remove(), QPMCache::remove(), QPixmapCache::replace(), QPMCache::replace(), and ~Key().

---

The documentation for this class was generated from the following files:

• /src/gui/image/qpixmapcache.h
• /src/gui/image/qpixmapcache.cpp