/****************************************************************************
**
** Implementation of TQIconSet class
**
** Created : 980318
**
** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
**
** This file is part of the kernel module of the TQt 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 TQt 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.TQPL
** included in the packaging of this file.  Licensees holding valid TQt
** Commercial licenses may use this file in accordance with the TQt
** Commercial License Agreement provided with the Software.
**
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** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
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**********************************************************************/

#include "tqiconset.h"

#ifndef TQT_NO_ICONSET

#include "tqapplication.h"
#include "tqbitmap.h"
#include "tqcleanuphandler.h"
#include "tqimage.h"
#include "tqpainter.h"

enum { NumSizes = 2, NumModes = 3, NumStates = 2 };

static TQIconFactory *defaultFac = 0;
static TQSingleCleanupHandler<TQIconFactory> q_cleanup_icon_factory;

static short widths[2] = { 22, 32 };
static short heights[2] = { 22, 32 };

enum TQIconSetIconOrigin {
    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 TQIconSet-generated pixmap (or 0)
};

struct TQIconSetIcon
{
    TQIconSetIconOrigin origin;
    union {
	TQString *fileName;
	TQPixmap *pixmap;
    };

    TQIconSetIcon() : origin( Generated ) { pixmap = 0; }
    TQIconSetIcon( const TQIconSetIcon& other )
	: origin( Generated ) {
	pixmap = 0;
	operator=( other );
    }
    ~TQIconSetIcon() {
	if ( origin == SuppliedFileName ) {
	    delete fileName;
	} else {
	    delete pixmap;
	}
    }

    TQIconSetIcon& operator=( const TQIconSetIcon& other );

    void clearCached() {
	if ( pixmap && (origin == Manufactured || origin == Generated) ) {
	    origin = Generated;
	    delete pixmap;
	    pixmap = 0;
	}
    }
};

TQIconSetIcon& TQIconSetIcon::operator=( const TQIconSetIcon& other )
{
    TQPixmap *oldPixmap = 0;
    TQString *oldFileName = 0;
    if ( origin == SuppliedFileName ) {
	oldFileName = fileName;
    } else {
	oldPixmap = pixmap;
    }

    origin = other.origin;
    if ( other.origin == SuppliedFileName ) {
	fileName = new TQString( *other.fileName );
    } else {
	if ( other.pixmap ) {
	    pixmap = new TQPixmap( *other.pixmap );
	} else {
	    pixmap = 0;
	}
    }
    delete oldPixmap;
    delete oldFileName;
    return *this;
}

class TQIconSetPrivate : public TQShared
{
public:
    TQIconSetIcon icons[NumSizes][NumModes][NumStates];
    TQPixmap defaultPix;
    TQIconFactory *factory;

    TQIconSetPrivate() : factory( 0 ) { }
    TQIconSetPrivate( const TQIconSetPrivate& other ) : TQShared() {
	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();
    }
    ~TQIconSetPrivate() {
	setFactory( 0 );
    }

    TQIconSetIcon *icon( const TQIconSet *iconSet, TQIconSet::Size size,
			TQIconSet::Mode mode, TQIconSet::State state );
    void setFactory( TQIconFactory *newFactory ) {
	if ( newFactory )
	    newFactory->ref();
	if ( factory && factory->deref() && factory->autoDelete() )
	    delete factory;
	factory = newFactory;
    }
};

TQIconSetIcon *TQIconSetPrivate::icon( const TQIconSet *iconSet,
				     TQIconSet::Size size, TQIconSet::Mode mode,
				     TQIconSet::State state )
{
    TQIconSetIcon *ik = &icons[(int) size - 1][(int) mode][(int) state];

    if ( iconSet ) {
	if ( ik->origin == SuppliedFileName ) {
	    TQPixmap *newPixmap = new TQPixmap( *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 ) {
	    TQIconFactory *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
		  TQIconSet::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 TQIconSet

  \brief The TQIconSet class provides a set of icons with different
  styles and sizes.

  \ingroup graphics
  \ingroup images
  \ingroup shared
  \mainclass

  A TQIconSet can generate smaller, larger, active, and disabled pixmaps
  from the set of icons it is given. Such pixmaps are used by
  TQToolButton, TQHeader, TQPopupMenu, etc. to show an icon representing a
  particular action.

  The simplest use of TQIconSet is to create one from a TQPixmap and then
  use it, allowing TQt to work out all the required icon styles and
  sizes. For example:

  \code
    TQToolButton *but = new TQToolButton( TQIconSet( TQPixmap("open.xpm") ), ... );
  \endcode

  Using whichever pixmaps you specify as a base, TQIconSet 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 TQIconSet 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),
  TQIconSet will return the icon that has been set or previously
  generated for that size, mode and state combination. If none is
  available, TQIconSet will ask the icon factory. If the icon factory
  cannot provide any (the default), TQIconSet 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, TQIconSet uses \link TQImage::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
  TQIconSet or by a factory; clearGenerated() clears all cached
  pixmaps.

  \section1 Making Classes that Use TQIconSet

  If you write your own widgets that have an option to set a small
  pixmap, consider allowing a TQIconSet to be set for that pixmap.  The
  TQt class TQToolButton is an example of such a widget.

  Provide a method to set a TQIconSet, and when you draw the icon, choose
  whichever icon is appropriate for the current state of your widget.
  For example:
  \code
    void MyWidget::drawIcon( TQPainter* p, TQPoint pos )
    {
	p->drawPixmap( pos, icons->pixmap(
				TQIconSet::Small,
				isEnabled() ? TQIconSet::Normal :
					      TQIconSet::Disabled,
				isEnabled() ? TQIconSet::On :
					      TQIconSet::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
  TQWidget::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 TQIconSet

  \sa TQIconFactory TQPixmap TQMainWindow::setUsesBigPixmaps()
      \link guibooks.html#fowler GUI Design Handbook: Iconic Label \endlink
*/


/*!
  \enum TQIconSet::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 TQIconSet::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() TQMainWindow::setUsesBigPixmaps()
*/

/*!
  \enum TQIconSet::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 TQIconSet::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()
*/
TQIconSet::TQIconSet()
    : 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 TQIconSet
  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()
*/
TQIconSet::TQIconSet( const TQPixmap& 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.
*/
TQIconSet::TQIconSet( const TQPixmap& smallPix, const TQPixmap& largePix )
    : d( 0 )
{
    reset( smallPix, Small );
    reset( largePix, Large );
}

/*!
  Constructs a copy of \a other. This is very fast.
*/
TQIconSet::TQIconSet( const TQIconSet& other )
    : d( other.d )
{
    if ( d )
	d->ref();
}

/*!
  Destroys the icon set and frees any allocated resources.
*/
TQIconSet::~TQIconSet()
{
    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 TQIconSet(\a pixmap, \a size) to this
  icon set.

  This function does nothing if \a pixmap is a null pixmap.
*/
void TQIconSet::reset( const TQPixmap& 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, TQIconSet 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 TQIconSet::setPixmap( const TQPixmap& pixmap, Size size, Mode mode,
			  State state )
{
    if ( pixmap.isNull() )
	return;

    normalize( size, pixmap.size() );

    detach();
    clearGenerated();

    TQIconSetIcon *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 TQPixmap( pixmap );
    } else {
	*icon->pixmap = pixmap;
    }
}

/*!
  \overload

  The pixmap is loaded from \a fileName when it becomes necessary.
*/
void TQIconSet::setPixmap( const TQString& fileName, Size size, Mode mode,
			  State state )
{
    if ( size == Automatic ) {
	setPixmap( TQPixmap(fileName), size, mode, state );
    } else {
	detach();
	clearGenerated();

	TQIconSetIcon *icon = d->icon( 0, size, mode, state );
	if ( icon->origin == SuppliedFileName ) {
	    *icon->fileName = fileName;
	} else {
	    delete icon->pixmap;
	    icon->fileName = new TQString( 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.
*/
TQPixmap TQIconSet::pixmap( Size size, Mode mode, State state ) const
{
    if ( !d ) {
	if ( defaultFac ) {
	    TQIconSet *that = (TQIconSet *) this;
	    that->detach();
	} else {
	    return TQPixmap();
	}
    }

    if ( size == Automatic )
	size = Small;

    TQIconSetIcon *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 TQIconFactory somehow
	  tries to access the pixmap it's supposed to be creating, it
	  will get a null pixmap.
	*/
	return TQPixmap();
    }

    if ( mode == Active )
	return pixmap( size, Normal, state );

    Size otherSize = ( size == Large ) ? Small : Large;
    TQIconSetIcon *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 TQPixmap( 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;
		TQIconSetIcon *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 TQPixmap( *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 TQPixmap( pixmap(size, mode, Off) );
	    }
	} else { /* ( mode == Disabled ) */
	    TQIconSetIcon *offIcon = d->icon( this, size, mode, Off );
	    TQIconSetIcon *otherSizeOffIcon = d->icon( this, otherSize, mode,
						      Off );

	    if ( offIcon->origin != Generated ) {
		if ( offIcon->pixmap )
		    icon->pixmap = new TQPixmap( *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 TQPixmap();
    }
}

/*! \overload
    \obsolete

  This is the same as pixmap(\a size, \a enabled, \a state).
*/
TQPixmap TQIconSet::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()
*/
TQPixmap TQIconSet::pixmap() const
{
    if ( !d )
	return TQPixmap();
    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 TQIconFactory is considered non-generated.
*/
bool TQIconSet::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 TQIconFactory.
*/
void TQIconSet::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, TQIconFactory::defaultFactory()
    is used.
*/
void TQIconSet::installIconFactory( TQIconFactory *factory )
{
    detach();
    d->setFactory( factory );
}

/*!
  Returns true if the icon set is empty; otherwise returns false.
*/
bool TQIconSet::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 TQIconSet functions
  call it as necessary.
*/
void TQIconSet::detach()
{
    if ( !d ) {
	d = new TQIconSetPrivate;
	return;
    }
    if ( d->count != 1 ) {
	d->deref();
	d = new TQIconSetPrivate( *d );
    }
}

/*!
  Assigns \a other to this icon set and returns a reference to this
  icon set.

  \sa detach()
*/
TQIconSet& TQIconSet::operator=( const TQIconSet& 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 TQIconSet::setIconSize( Size which, const TQSize& 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 TQSize& TQIconSet::iconSize( Size which )
{
    // ### replace 'const TQSize&' with TQSize in TQt 4 and simply this code
    static TQSize size;
    size = TQSize( widths[(int) which - 1], heights[(int) which - 1] );
    return size;
}

void TQIconSet::normalize( Size& which, const TQSize& 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.
*/
TQPixmap *TQIconSet::createScaled( Size size, const TQPixmap *suppliedPix ) const
{
    if ( !suppliedPix || suppliedPix->isNull() )
	return 0;

    TQImage img = suppliedPix->convertToImage();
    TQSize imgSize = iconSize( size );
    if ( size == Small ) {
	imgSize = imgSize.boundedTo( img.size() );
    } else {
	imgSize = imgSize.expandedTo( img.size() );
    }
    img = img.smoothScale( imgSize );

    TQPixmap *pixmap = new TQPixmap( img );
    if ( !pixmap->mask() ) {
	TQBitmap mask;
	mask.convertFromImage( img.createHeuristicMask(),
			       TQt::MonoOnly | TQt::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.
*/
TQPixmap *TQIconSet::createDisabled( Size size, State state ) const
{
    TQPixmap normalPix = pixmap( size, Normal, state );
    if ( normalPix.isNull() )
	return 0;

    TQImage img;
    TQPixmap *pixmap = 0;
    TQBitmap normalMask;
    if ( normalPix.mask() ) {
	normalMask = *normalPix.mask();
    } else {
	img = normalPix.convertToImage();
	normalMask.convertFromImage( img.createHeuristicMask(),
				     TQt::MonoOnly | TQt::ThresholdDither );
    }
    
    pixmap = new TQPixmap( normalPix.width() + 1,
			  normalPix.height() + 1 );
    const TQColorGroup &dis = TQApplication::palette().disabled();
    pixmap->fill( dis.background() );

    TQPainter 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 );

    TQBitmap mask( pixmap->size() );
    mask.fill( TQt::color0 );
    painter.begin( &mask );
    painter.drawPixmap( 0, 0, normalMask );
    painter.drawPixmap( 1, 1, normalMask );
    painter.end();
    pixmap->setMask( mask );
    return pixmap;
}

/*! \class TQIconFactory
  \ingroup advanced
  \brief The TQIconFactory class is used to create pixmaps for a TQIconSet.

  By reimplementing createPixmap(), you can override TQIconSet'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 TQIconSet.

  \sa TQIconSet
*/

/*!
  Constructs an icon factory.
*/
TQIconFactory::TQIconFactory()
    : autoDel( 0 )
{
    count = 0;
}

/*!
  Destroys the object and frees any allocated resources.
*/
TQIconFactory::~TQIconFactory()
{
}

/*!
  Ceates a pixmap for \a iconSet with a certain \a size, \a mode, and
  \a state. Returns 0 if the default TQIconSet 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.
*/
TQPixmap *TQIconFactory::createPixmap( const TQIconSet& /* iconSet */,
				     TQIconSet::Size /* size */,
				     TQIconSet::Mode /* mode */,
				     TQIconSet::State /* state */ )
{
    return 0;
}

/*!
    \fn void TQIconFactory::setAutoDelete( bool autoDelete )

    If \a autoDelete is true, sets the icon factory to automatically
    delete itself when it is no longer referenced by any TQIconSet and
    isn't the default factory. If \a autoDelete is false (the default)
    auto-deletion is disabled.

    \sa autoDelete(), defaultFactory()
*/

/*!
  \fn bool TQIconFactory::autoDelete() const

  Returns true if auto-deletion is enabled; otherwise returns false.

  \sa setAutoDelete()
*/

/*!
  Returns the default icon factory.

  \sa installDefaultFactory()
*/
TQIconFactory *TQIconFactory::defaultFactory()
{
    if ( !defaultFac ) {
	defaultFac = new TQIconFactory;
	defaultFac->setAutoDelete( true );
	defaultFac->ref();
	q_cleanup_icon_factory.set( &defaultFac );
    }
    return defaultFac;
}

/*!
  Replaces the default icon factory with \a factory.
*/
void TQIconFactory::installDefaultFactory( TQIconFactory *factory )
{
    if ( !factory )
	return;

    factory->ref();
    if ( defaultFac && defaultFac->deref() && defaultFac->autoDelete() )
	delete defaultFac;
    defaultFac = factory;
    q_cleanup_icon_factory.set( &defaultFac );
}

#endif // TQT_NO_ICONSET
