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#ifndef oxygen_shadowCacheh
#define oxygen_shadowCacheh
//////////////////////////////////////////////////////////////////////////////
// oxygenshadowcache.h
// handles caching of TileSet objects to draw shadows
// -------------------
//
// Copyright (c) 2009 Hugo Pereira Da Costa <hugo.pereira@free.fr>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//////////////////////////////////////////////////////////////////////////////
#include "oxygenhelper.h"
#include "oxygen_export.h"
#include <QCache>
#include <QRadialGradient>
#include <cmath>
namespace Oxygen
{
class OXYGEN_EXPORT ShadowCache
{
public:
//* constructor
explicit ShadowCache( Helper& );
//* destructor
virtual ~ShadowCache( void )
{}
//* read configuration
void readConfig( void );
//* animations duration
void setAnimationsDuration( int );
//* cache size
void setEnabled( bool enabled )
{
_enabled = enabled;
if( enabled )
{
_shadowCache.setMaxCost( 1<<6 );
_animatedShadowCache.setMaxCost( _maxIndex<<6 );
} else {
_shadowCache.setMaxCost( 1 );
_animatedShadowCache.setMaxCost( 1 );
}
}
//* max animation index
int maxIndex( void ) const
{ return _maxIndex; }
//* max animation index
void setMaxIndex( int value )
{
_maxIndex = value;
if( _enabled )
{
_shadowCache.setMaxCost( 1<<6 );
_animatedShadowCache.setMaxCost( _maxIndex<<6 );
}
}
//* invalidate caches
void invalidateCaches( void )
{
_shadowCache.clear();
_animatedShadowCache.clear();
}
//* true if shadow is enabled for a given group
bool isEnabled( QPalette::ColorGroup ) const;
//* set shadow size manually
void setShadowSize( QPalette::ColorGroup, int );
//* shadow size
int shadowSize( void ) const;
//* Key class to be used into QCache
/*! class is entirely inline for optimization */
class Key
{
public:
//* explicit constructor
explicit Key( void )
{}
//* constructor from int
explicit Key( int hash ):
index( hash >> 3 ),
active( ( hash >> 2 )&1 ),
isShade( ( hash >> 1)&1 ),
hasBorder( (hash)&1 )
{}
//* hash function
int hash( void ) const
{
return
( index << 3 ) |
( active << 2 ) |
( isShade<< 1 ) |
( hasBorder );
}
int index = 0;
bool active = false;
bool isShade = false;
bool hasBorder = true;
};
//* get shadow matching client
TileSet tileSet( const Key& );
//* get shadow matching client and opacity
TileSet tileSet( Key, qreal );
//* simple pixmap
QPixmap pixmap( const Key& key ) const
{ return pixmap( key, key.active ); }
//* simple pixmap, with opacity
QPixmap animatedPixmap( const Key&, qreal opacity );
protected:
Helper& helper( void ) const
{ return _helper; }
//* simple pixmap
QPixmap pixmap( const Key&, bool active ) const;
//* draw gradient into rect
/*! a separate method is used in order to properly account for corners */
void renderGradient( QPainter&, const QRectF&, const QRadialGradient&, bool hasBorder = true ) const;
private:
//* helper
Helper& _helper;
//* defines overlap between shadows and body
enum { overlap = 4 };
//* caching enable state
bool _enabled;
//* shadow size
int _activeShadowSize;
//* shadow size
int _inactiveShadowSize;
//* max index
/*! it is used to set caches max cost, and calculate animation opacity */
int _maxIndex;
//* cache
using TileSetCache = QCache<int, TileSet>;
//* shadow cache
TileSetCache _shadowCache;
//* animated shadow cache
TileSetCache _animatedShadowCache;
};
}
#endif
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