Helper base class for retrieving icons for files for usage by QFileIconProvider and related. More...

#include <qabstractfileiconengine_p.h>

Inheritance diagram for QAbstractFileIconEngine:

Collaboration diagram for QAbstractFileIconEngine:

Public Member Functions
	QAbstractFileIconEngine (const QFileInfo &info, QPlatformTheme::IconOptions opts)
QPixmap	pixmap (const QSize &size, QIcon::Mode mode, QIcon::State) override
	Returns the icon as a pixmap with the required size, mode, and state.
QPixmap	scaledPixmap (const QSize &size, QIcon::Mode mode, QIcon::State, qreal scale) override
QSize	actualSize (const QSize &size, QIcon::Mode mode, QIcon::State state) override
	Returns the actual size of the icon the engine provides for the requested size, mode and state.
bool	isNull () override
QFileInfo	fileInfo () const
QPlatformTheme::IconOptions	options () const
Public Member Functions inherited from QPixmapIconEngine
	QPixmapIconEngine ()
	QPixmapIconEngine (const QPixmapIconEngine &)
	~QPixmapIconEngine ()
void	paint (QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state) override
	Uses the given painter to paint the icon with the required mode and state into the rectangle rect.
QPixmap	pixmap (const QSize &size, QIcon::Mode mode, QIcon::State state) override
	Returns the icon as a pixmap with the required size, mode, and state.
QPixmap	scaledPixmap (const QSize &size, QIcon::Mode mode, QIcon::State state, qreal scale) override
QPixmapIconEngineEntry *	bestMatch (const QSize &size, qreal scale, QIcon::Mode mode, QIcon::State state)
QSize	actualSize (const QSize &size, QIcon::Mode mode, QIcon::State state) override
	Returns the actual size of the icon the engine provides for the requested size, mode and state.
QList< QSize >	availableSizes (QIcon::Mode mode, QIcon::State state) override
	Returns sizes of all images that are contained in the engine for the specific mode and state.
void	addPixmap (const QPixmap &pixmap, QIcon::Mode mode, QIcon::State state) override
	Called by QIcon::addPixmap().
void	addFile (const QString &fileName, const QSize &size, QIcon::Mode mode, QIcon::State state) override
	Called by QIcon::addFile().
bool	isNull () override
QString	key () const override
	\variable QIconEngine::ScaledPixmapArgument::size
QIconEngine *	clone () const override
	Reimplement this method to return a clone of this icon engine.
bool	read (QDataStream &in) override
	Reads icon engine contents from the QDataStream in.
bool	write (QDataStream &out) const override
	Writes the contents of this engine to the QDataStream out.
Public Member Functions inherited from QIconEngine
	QIconEngine ()
virtual	~QIconEngine ()
	Destroys the icon engine.
virtual QString	iconName ()
	Returns the name used to create the engine, if available.
virtual void	virtual_hook (int id, void *data)
	Additional method to allow extending QIconEngine without adding new virtual methods (and without breaking binary compatibility).

Static Public Member Functions
template<class It>
static QList< QSize >	toSizeList (It i1, It i2)
Static Public Member Functions inherited from QPixmapIconEngine
static QSize	adjustSize (const QSize &expectedSize, QSize size)

Protected Member Functions
virtual QPixmap	filePixmap (const QSize &size, QIcon::Mode mode, QIcon::State)=0
virtual QString	cacheKey () const
Protected Member Functions inherited from QIconEngine
	QIconEngine (const QIconEngine &other)

Additional Inherited Members
Public Types inherited from QIconEngine
enum	IconEngineHook { IsNullHook = 3 , ScaledPixmapHook }
	These enum values are used for virtual_hook() to allow additional queries to icon engine without breaking binary compatibility. More...

Detailed Description

Helper base class for retrieving icons for files for usage by QFileIconProvider and related.

Reimplement availableSizes() and new virtual filePixmap() and return icons created with this engine from QPlatformTheme::fileIcon().

Note: The class internally caches pixmaps for files by suffix (with the exception of some files on Windows), but not for directories (since directory icons may have overlay icons on Windows). You might want to cache pixmaps for directories in your implementation.