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qt3/src/kernel/qiconset.cpp

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/****************************************************************************
**
** Implementation of QIconSet class
**
** Created : 980318
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.QPL
** included in the packaging of this file. Licensees holding valid Qt
** Commercial licenses may use this file in accordance with the Qt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
#include "qiconset.h"
#ifndef QT_NO_ICONSET
#include "qapplication.h"
#include "qbitmap.h"
#include "qcleanuphandler.h"
#include "qimage.h"
#include "qpainter.h"
enum { NumSizes = 2, NumModes = 3, NumStates = 2 };
static QIconFactory *defaultFac = 0;
static QSingleCleanupHandler<QIconFactory> q_cleanup_icon_factory;
static short widths[2] = { 22, 32 };
static short heights[2] = { 22, 32 };
enum QIconSetIconOrigin {
SuppliedFileName, // 'fileName' contains the name of the file
SuppliedPixmap, // 'pixmap' is a pointer to the user-supplied pixmap
Manufactured, // 'pixmap' is a factory-generated pixmap (or 0)
Generated // 'pixmap' is a QIconSet-generated pixmap (or 0)
};
struct QIconSetIcon
{
QIconSetIconOrigin origin;
union {
QString *fileName;
QPixmap *pixmap;
};
QIconSetIcon() : origin( Generated ) { pixmap = 0; }
QIconSetIcon( const QIconSetIcon& other )
: origin( Generated ) {
pixmap = 0;
operator=( other );
}
~QIconSetIcon() {
if ( origin == SuppliedFileName ) {
delete fileName;
} else {
delete pixmap;
}
}
QIconSetIcon& operator=( const QIconSetIcon& other );
void clearCached() {
if ( pixmap && (origin == Manufactured || origin == Generated) ) {
origin = Generated;
delete pixmap;
pixmap = 0;
}
}
};
QIconSetIcon& QIconSetIcon::operator=( const QIconSetIcon& other )
{
QPixmap *oldPixmap = 0;
QString *oldFileName = 0;
if ( origin == SuppliedFileName ) {
oldFileName = fileName;
} else {
oldPixmap = pixmap;
}
origin = other.origin;
if ( other.origin == SuppliedFileName ) {
fileName = new QString( *other.fileName );
} else {
if ( other.pixmap ) {
pixmap = new QPixmap( *other.pixmap );
} else {
pixmap = 0;
}
}
delete oldPixmap;
delete oldFileName;
return *this;
}
class QIconSetPrivate : public QShared
{
public:
QIconSetIcon icons[NumSizes][NumModes][NumStates];
QPixmap defaultPix;
QIconFactory *factory;
QIconSetPrivate() : factory( 0 ) { }
QIconSetPrivate( const QIconSetPrivate& other ) : QShared() {
count = 1;
for ( int i = 0; i < NumSizes; i++ ) {
for ( int j = 0; j < NumModes; j++ ) {
for ( int k = 0; k < NumStates; k++ ) {
icons[i][j][k] = other.icons[i][j][k];
}
}
}
defaultPix = other.defaultPix;
factory = other.factory;
if ( factory )
factory->ref();
}
~QIconSetPrivate() {
setFactory( 0 );
}
QIconSetIcon *icon( const QIconSet *iconSet, QIconSet::Size size,
QIconSet::Mode mode, QIconSet::State state );
void setFactory( QIconFactory *newFactory ) {
if ( newFactory )
newFactory->ref();
if ( factory && factory->deref() && factory->autoDelete() )
delete factory;
factory = newFactory;
}
Q_DUMMY_COMPARISON_OPERATOR( QIconSetPrivate )
};
QIconSetIcon *QIconSetPrivate::icon( const QIconSet *iconSet,
QIconSet::Size size, QIconSet::Mode mode,
QIconSet::State state )
{
QIconSetIcon *ik = &icons[(int) size - 1][(int) mode][(int) state];
if ( iconSet ) {
if ( ik->origin == SuppliedFileName ) {
QPixmap *newPixmap = new QPixmap( *ik->fileName );
delete ik->fileName;
if ( newPixmap->isNull() ) {
delete newPixmap;
ik->origin = Generated;
ik->pixmap = 0;
} else {
ik->origin = SuppliedPixmap;
ik->pixmap = newPixmap;
}
}
if ( !ik->pixmap && ik->origin == Generated ) {
QIconFactory *f = factory;
if ( !f )
f = defaultFac;
if ( f ) {
/*
We set 'origin' to Manufactured half a second too
early to prevent recursive calls to this function.
(This can happen if createPixmap() calls
QIconSet::pixmap(), which in turn calls this
function.)
*/
ik->origin = Manufactured;
ik->pixmap = f->createPixmap( *iconSet, size, mode, state );
if ( !ik->pixmap )
ik->origin = Generated;
}
}
}
return ik;
}
/*! \class QIconSet
\brief The QIconSet class provides a set of icons with different
styles and sizes.
\ingroup graphics
\ingroup images
\ingroup shared
\mainclass
A QIconSet can generate smaller, larger, active, and disabled pixmaps
from the set of icons it is given. Such pixmaps are used by
QToolButton, QHeader, QPopupMenu, etc. to show an icon representing a
particular action.
The simplest use of QIconSet is to create one from a QPixmap and then
use it, allowing Qt to work out all the required icon styles and
sizes. For example:
\code
QToolButton *but = new QToolButton( QIconSet( QPixmap("open.xpm") ), ... );
\endcode
Using whichever pixmaps you specify as a base, QIconSet provides a
set of six icons, each with a \l Size and a \l Mode: Small Normal,
Small Disabled, Small Active, Large Normal, Large Disabled, and
Large Active.
An additional set of six icons can be provided for widgets that have
an "On" or "Off" state, like checkable menu items or toggleable
toolbuttons. If you provide pixmaps for the "On" state, but not for
the "Off" state, the QIconSet will provide the "Off" pixmaps. You may
specify icons for both states in you wish.
You can set any of the icons using setPixmap().
When you retrieve a pixmap using pixmap(Size, Mode, State),
QIconSet will return the icon that has been set or previously
generated for that size, mode and state combination. If none is
available, QIconSet will ask the icon factory. If the icon factory
cannot provide any (the default), QIconSet generates a pixmap based
on the pixmaps it has been given and returns it.
The \c Disabled appearance is computed using an algorithm that
produces results very similar to those used in Microsoft Windows
95. The \c Active appearance is identical to the \c Normal
appearance unless you use setPixmap() to set it to something
special.
When scaling icons, QIconSet uses \link QImage::smoothScale()
smooth scaling\endlink, which can partially blend the color component
of pixmaps. If the results look poor, the best solution
is to supply pixmaps in both large and small sizes.
You can use the static function setIconSize() to set the preferred
size of the generated large/small icons. The default small size is
22 x 22, while the default large size is 32 x 32. These sizes only
affect generated icons.
The isGenerated() function returns TRUE if an icon was generated by
QIconSet or by a factory; clearGenerated() clears all cached
pixmaps.
\section1 Making Classes that Use QIconSet
If you write your own widgets that have an option to set a small
pixmap, consider allowing a QIconSet to be set for that pixmap. The
Qt class QToolButton is an example of such a widget.
Provide a method to set a QIconSet, and when you draw the icon, choose
whichever icon is appropriate for the current state of your widget.
For example:
\code
void MyWidget::drawIcon( QPainter* p, QPoint pos )
{
p->drawPixmap( pos, icons->pixmap(
QIconSet::Small,
isEnabled() ? QIconSet::Normal :
QIconSet::Disabled,
isEnabled() ? QIconSet::On :
QIconSet::Off));
}
\endcode
You might also make use of the \c Active mode, perhaps making your
widget \c Active when the mouse is over the widget (see \l
QWidget::enterEvent()), while the mouse is pressed pending the
release that will activate the function, or when it is the currently
selected item. If the widget can be toggled, the "On" mode might be
used to draw a different icon.
\img iconset.png QIconSet
\sa QIconFactory QPixmap QMainWindow::setUsesBigPixmaps()
\link guibooks.html#fowler GUI Design Handbook: Iconic Label \endlink
*/
/*!
\enum QIconSet::Size
This enum type describes the size at which a pixmap is intended to be
used.
The currently defined sizes are:
\value Automatic The size of the pixmap is determined from its
pixel size. This is a useful default.
\value Small The pixmap is the smaller of two.
\value Large The pixmap is the larger of two.
If a Small pixmap is not set by QIconSet::setPixmap(), the Large
pixmap will be automatically scaled down to the size of a small pixmap
to generate the Small pixmap when required. Similarly, a Small pixmap
will be automatically scaled up to generate a Large pixmap. The
preferred sizes for large/small generated icons can be set using
setIconSize().
\sa setIconSize() iconSize() setPixmap() pixmap() QMainWindow::setUsesBigPixmaps()
*/
/*!
\enum QIconSet::Mode
This enum type describes the mode for which a pixmap is intended to be
used.
The currently defined modes are:
\value Normal
Display the pixmap when the user is
not interacting with the icon, but the
functionality represented by the icon is available.
\value Disabled
Display the pixmap when the
functionality represented by the icon is not available.
\value Active
Display the pixmap when the
functionality represented by the icon is available and
the user is interacting with the icon, for example, moving the
mouse over it or clicking it.
*/
/*!
\enum QIconSet::State
This enum describes the state for which a pixmap is intended to be
used. The \e state can be:
\value Off Display the pixmap when the widget is in an "off" state
\value On Display the pixmap when the widget is in an "on" state
\sa setPixmap() pixmap()
*/
/*!
Constructs a null icon set.
\sa setPixmap(), reset()
*/
QIconSet::QIconSet()
: d( 0 )
{
}
/*!
Constructs an icon set for which the Normal pixmap is \a pixmap,
which is assumed to be of size \a size.
The default for \a size is \c Automatic, which means that QIconSet
will determine whether the pixmap is Small or Large from its pixel
size. Pixmaps less than the width of a small generated icon are
considered to be Small. You can use setIconSize() to set the
preferred size of a generated icon.
\sa setIconSize() reset()
*/
QIconSet::QIconSet( const QPixmap& pixmap, Size size )
: d( 0 )
{
reset( pixmap, size );
}
/*! Creates an iconset which uses the pixmap \a smallPix for for
displaying a small icon, and the pixmap \a largePix for displaying a
large icon.
*/
QIconSet::QIconSet( const QPixmap& smallPix, const QPixmap& largePix )
: d( 0 )
{
reset( smallPix, Small );
reset( largePix, Large );
}
/*!
Constructs a copy of \a other. This is very fast.
*/
QIconSet::QIconSet( const QIconSet& other )
: d( other.d )
{
if ( d )
d->ref();
}
/*!
Destroys the icon set and frees any allocated resources.
*/
QIconSet::~QIconSet()
{
if ( d && d->deref() )
delete d;
}
/*!
Sets this icon set to use pixmap \a pixmap for the Normal pixmap,
assuming it to be of size \a size.
This is equivalent to assigning QIconSet(\a pixmap, \a size) to this
icon set.
This function does nothing if \a pixmap is a null pixmap.
*/
void QIconSet::reset( const QPixmap& pixmap, Size size )
{
if ( pixmap.isNull() )
return;
detach();
normalize( size, pixmap.size() );
setPixmap( pixmap, size, Normal );
d->defaultPix = pixmap;
d->setFactory( 0 );
}
/*!
Sets this icon set to provide pixmap \a pixmap for size \a size, mode \a
mode and state \a state. The icon set may also use \a pixmap for
generating other pixmaps if they are not explicitly set.
The \a size can be one of Automatic, Large or Small. If Automatic is
used, QIconSet will determine if the pixmap is Small or Large from its
pixel size.
Pixmaps less than the width of a small generated icon are
considered to be Small. You can use setIconSize() to set the preferred
size of a generated icon.
This function does nothing if \a pixmap is a null pixmap.
\sa reset()
*/
void QIconSet::setPixmap( const QPixmap& pixmap, Size size, Mode mode,
State state )
{
if ( pixmap.isNull() )
return;
normalize( size, pixmap.size() );
detach();
clearGenerated();
QIconSetIcon *icon = d->icon( 0, size, mode, state );
if ( icon->origin == SuppliedFileName ) {
delete icon->fileName;
icon->pixmap = 0;
}
icon->origin = SuppliedPixmap;
if ( icon->pixmap == 0 ) {
icon->pixmap = new QPixmap( pixmap );
} else {
*icon->pixmap = pixmap;
}
}
/*!
\overload
The pixmap is loaded from \a fileName when it becomes necessary.
*/
void QIconSet::setPixmap( const QString& fileName, Size size, Mode mode,
State state )
{
if ( size == Automatic ) {
setPixmap( QPixmap(fileName), size, mode, state );
} else {
detach();
clearGenerated();
QIconSetIcon *icon = d->icon( 0, size, mode, state );
if ( icon->origin == SuppliedFileName ) {
*icon->fileName = fileName;
} else {
delete icon->pixmap;
icon->fileName = new QString( fileName );
icon->origin = SuppliedFileName;
}
}
}
/*!
Returns a pixmap with size \a size, mode \a mode and state \a
state, generating one if necessary. Generated pixmaps are cached.
*/
QPixmap QIconSet::pixmap( Size size, Mode mode, State state ) const
{
if ( !d ) {
if ( defaultFac ) {
QIconSet *that = (QIconSet *) this;
that->detach();
} else {
return QPixmap();
}
}
if ( size == Automatic )
size = Small;
QIconSetIcon *icon = d->icon( this, size, mode, state );
if ( icon->pixmap )
return *icon->pixmap;
if ( icon->origin == Manufactured ) {
/*
This can only occur during the half a second's time when
the icon is being manufactured. If QIconFactory somehow
tries to access the pixmap it's supposed to be creating, it
will get a null pixmap.
*/
return QPixmap();
}
if ( mode == Active )
return pixmap( size, Normal, state );
Size otherSize = ( size == Large ) ? Small : Large;
QIconSetIcon *otherSizeIcon = d->icon( this, otherSize, mode, state );
if ( state == Off ) {
if ( mode == Disabled &&
d->icon(this, size, Normal, Off)->origin != Generated ) {
icon->pixmap = createDisabled( size, Off );
} else if ( otherSizeIcon->origin != Generated ) {
icon->pixmap = createScaled( size, otherSizeIcon->pixmap );
} else if ( mode == Disabled ) {
icon->pixmap = createDisabled( size, Off );
} else if ( !d->defaultPix.isNull() ) {
icon->pixmap = new QPixmap( d->defaultPix );
} else {
/*
No icons are available for { TRUE, Normal, Off } and
{ FALSE, Normal, Off }. Try the other 10 combinaisons,
best ones first.
*/
const int N = 10;
static const struct {
bool sameSize;
Mode mode;
State state;
} tryList[N] = {
{ TRUE, Active, Off },
{ TRUE, Normal, On },
{ TRUE, Active, On },
{ FALSE, Active, Off },
{ FALSE, Normal, On },
{ FALSE, Active, On },
{ TRUE, Disabled, Off },
{ TRUE, Disabled, On },
{ FALSE, Disabled, Off },
{ FALSE, Disabled, On }
};
for ( int i = 0; i < N; i++ ) {
bool sameSize = tryList[i].sameSize;
QIconSetIcon *tryIcon =
d->icon( this, sameSize ? size : otherSize,
tryList[i].mode, tryList[i].state );
if ( tryIcon->origin != Generated ) {
if ( sameSize ) {
if ( tryIcon->pixmap )
icon->pixmap = new QPixmap( *tryIcon->pixmap );
} else {
icon->pixmap = createScaled( size, tryIcon->pixmap );
}
break;
}
}
}
} else { /* ( state == On ) */
if ( mode == Normal ) {
if ( otherSizeIcon->origin != Generated ) {
icon->pixmap = createScaled( size, otherSizeIcon->pixmap );
} else {
icon->pixmap = new QPixmap( pixmap(size, mode, Off) );
}
} else { /* ( mode == Disabled ) */
QIconSetIcon *offIcon = d->icon( this, size, mode, Off );
QIconSetIcon *otherSizeOffIcon = d->icon( this, otherSize, mode,
Off );
if ( offIcon->origin != Generated ) {
if ( offIcon->pixmap )
icon->pixmap = new QPixmap( *offIcon->pixmap );
} else if ( d->icon(this, size, Normal, On)->origin != Generated ) {
icon->pixmap = createDisabled( size, On );
} else if ( otherSizeIcon->origin != Generated ) {
icon->pixmap = createScaled( size, otherSizeIcon->pixmap );
} else if ( otherSizeOffIcon->origin != Generated ) {
icon->pixmap = createScaled( size, otherSizeOffIcon->pixmap );
} else {
icon->pixmap = createDisabled( size, On );
}
}
}
if ( icon->pixmap ) {
return *icon->pixmap;
} else {
return QPixmap();
}
}
/*! \overload
\obsolete
This is the same as pixmap(\a size, \a enabled, \a state).
*/
QPixmap QIconSet::pixmap( Size size, bool enabled, State state ) const
{
return pixmap( size, enabled ? Normal : Disabled, state );
}
/*!
\overload
Returns the pixmap originally provided to the constructor or to
reset(). This is the Normal pixmap of unspecified Size.
\sa reset()
*/
QPixmap QIconSet::pixmap() const
{
if ( !d )
return QPixmap();
return d->defaultPix;
}
/*!
Returns TRUE if the pixmap with size \a size, mode \a mode and
state \a state is generated from other pixmaps; otherwise returns
FALSE.
A pixmap obtained from a QIconFactory is considered non-generated.
*/
bool QIconSet::isGenerated( Size size, Mode mode, State state ) const
{
if ( !d )
return TRUE;
return d->icon( this, size, mode, state )->origin == Generated;
}
/*!
Clears all cached pixmaps, including those obtained from an
eventual QIconFactory.
*/
void QIconSet::clearGenerated()
{
if ( !d )
return;
for ( int i = 0; i < NumSizes; i++ ) {
for ( int j = 0; j < NumModes; j++ ) {
for ( int k = 0; k < NumStates; k++ ) {
d->icons[i][j][k].clearCached();
}
}
}
}
/*!
Installs \a factory as the icon factory for this iconset. The
icon factory is used to generates pixmaps not set by the user.
If no icon factory is installed, QIconFactory::defaultFactory()
is used.
*/
void QIconSet::installIconFactory( QIconFactory *factory )
{
detach();
d->setFactory( factory );
}
/*!
Returns TRUE if the icon set is empty; otherwise returns FALSE.
*/
bool QIconSet::isNull() const
{
return !d;
}
/*!
Detaches this icon set from others with which it may share data.
You will never need to call this function; other QIconSet functions
call it as necessary.
*/
void QIconSet::detach()
{
if ( !d ) {
d = new QIconSetPrivate;
return;
}
if ( d->count != 1 ) {
d->deref();
d = new QIconSetPrivate( *d );
}
}
/*!
Assigns \a other to this icon set and returns a reference to this
icon set.
\sa detach()
*/
QIconSet& QIconSet::operator=( const QIconSet& other )
{
if ( other.d )
other.d->ref();
if ( d && d->deref() )
delete d;
d = other.d;
return *this;
}
/*!
Set the preferred size for all small or large icons that are
generated after this call. If \a which is Small, sets the preferred
size of small generated icons to \a size. Similarly, if \a which is
Large, sets the preferred size of large generated icons to \a size.
Note that cached icons will not be regenerated, so it is recommended
that you set the preferred icon sizes before generating any icon sets.
Also note that the preferred icon sizes will be ignored for icon sets
that have been created using both small and large pixmaps.
\sa iconSize()
*/
void QIconSet::setIconSize( Size which, const QSize& size )
{
widths[(int) which - 1] = size.width();
heights[(int) which - 1] = size.height();
}
/*!
If \a which is Small, returns the preferred size of a small
generated icon; if \a which is Large, returns the preferred size
of a large generated icon.
\sa setIconSize()
*/
const QSize& QIconSet::iconSize( Size which )
{
// ### replace 'const QSize&' with QSize in Qt 4 and simply this code
static QSize size;
size = QSize( widths[(int) which - 1], heights[(int) which - 1] );
return size;
}
void QIconSet::normalize( Size& which, const QSize& pixSize )
{
if ( which == Automatic )
which = pixSize.width() > iconSize( Small ).width() ? Large : Small;
}
/*!
Returns a new pixmap that is a copy of \a suppliedPix, scaled to
the icon size \a size.
*/
QPixmap *QIconSet::createScaled( Size size, const QPixmap *suppliedPix ) const
{
if ( !suppliedPix || suppliedPix->isNull() )
return 0;
QImage img = suppliedPix->convertToImage();
QSize imgSize = iconSize( size );
if ( size == Small ) {
imgSize = imgSize.boundedTo( img.size() );
} else {
imgSize = imgSize.expandedTo( img.size() );
}
img = img.smoothScale( imgSize );
QPixmap *pixmap = new QPixmap( img );
if ( !pixmap->mask() ) {
QBitmap mask;
mask.convertFromImage( img.createHeuristicMask(),
Qt::MonoOnly | Qt::ThresholdDither );
pixmap->setMask( mask );
}
return pixmap;
}
/*!
Returns a new pixmap that has a 'disabled' look, taking as its
base the iconset's icon with size \a size and state \a state.
*/
QPixmap *QIconSet::createDisabled( Size size, State state ) const
{
QPixmap normalPix = pixmap( size, Normal, state );
if ( normalPix.isNull() )
return 0;
QImage img;
QPixmap *pixmap = 0;
QBitmap normalMask;
if ( normalPix.mask() ) {
normalMask = *normalPix.mask();
} else {
img = normalPix.convertToImage();
normalMask.convertFromImage( img.createHeuristicMask(),
Qt::MonoOnly | Qt::ThresholdDither );
}
pixmap = new QPixmap( normalPix.width() + 1,
normalPix.height() + 1 );
const QColorGroup &dis = QApplication::palette().disabled();
pixmap->fill( dis.background() );
QPainter painter;
painter.begin( pixmap );
painter.setPen( dis.base() );
painter.drawPixmap( 1, 1, normalMask );
painter.setPen( dis.foreground() );
painter.drawPixmap( 0, 0, normalMask );
painter.end();
if ( !normalMask.mask() )
normalMask.setMask( normalMask );
QBitmap mask( pixmap->size() );
mask.fill( Qt::color0 );
painter.begin( &mask );
painter.drawPixmap( 0, 0, normalMask );
painter.drawPixmap( 1, 1, normalMask );
painter.end();
pixmap->setMask( mask );
return pixmap;
}
/*! \class QIconFactory
\ingroup advanced
\brief The QIconFactory class is used to create pixmaps for a QIconSet.
By reimplementing createPixmap(), you can override QIconSet's
default algorithm for computing pixmaps not supplied by the user.
Call setAutoDelete(TRUE) if you want the factory to automatically
delete itself when it is no longer needed by QIconSet.
\sa QIconSet
*/
/*!
Constructs an icon factory.
*/
QIconFactory::QIconFactory()
: autoDel( 0 )
{
count = 0;
}
/*!
Destroys the object and frees any allocated resources.
*/
QIconFactory::~QIconFactory()
{
}
/*!
Ceates a pixmap for \a iconSet with a certain \a size, \a mode, and
\a state. Returns 0 if the default QIconSet algorithm should be
used to create a pixmap that wasn't supplied by the user.
It is the caller's responsibility to delete the returned pixmap.
The default implementation always returns 0.
*/
QPixmap *QIconFactory::createPixmap( const QIconSet& /* iconSet */,
QIconSet::Size /* size */,
QIconSet::Mode /* mode */,
QIconSet::State /* state */ )
{
return 0;
}
/*!
\fn void QIconFactory::setAutoDelete( bool autoDelete )
If \a autoDelete is TRUE, sets the icon factory to automatically
delete itself when it is no longer referenced by any QIconSet and
isn't the default factory. If \a autoDelete is FALSE (the default)
auto-deletion is disabled.
\sa autoDelete(), defaultFactory()
*/
/*!
\fn bool QIconFactory::autoDelete() const
Returns TRUE if auto-deletion is enabled; otherwise returns FALSE.
\sa setAutoDelete()
*/
/*!
Returns the default icon factory.
\sa installDefaultFactory()
*/
QIconFactory *QIconFactory::defaultFactory()
{
if ( !defaultFac ) {
defaultFac = new QIconFactory;
defaultFac->setAutoDelete( TRUE );
defaultFac->ref();
q_cleanup_icon_factory.set( &defaultFac );
}
return defaultFac;
}
/*!
Replaces the default icon factory with \a factory.
*/
void QIconFactory::installDefaultFactory( QIconFactory *factory )
{
if ( !factory )
return;
factory->ref();
if ( defaultFac && defaultFac->deref() && defaultFac->autoDelete() )
delete defaultFac;
defaultFac = factory;
q_cleanup_icon_factory.set( &defaultFac );
}
#endif // QT_NO_ICONSET
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