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#ifndef oxygenframeshadow_h
#define oxygenframeshadow_h
//////////////////////////////////////////////////////////////////////////////
// oxygenframeshadow.h
// handle frames' shadows and rounded corners
// -------------------
//
// Copyright (c) 2010 Hugo Pereira Da Costa <hugo.pereira@free.fr>
//
// Largely inspired from skulpture widget style
// Copyright (c) 2007-2009 Christoph Feck <christoph@maxiom.de>
//
// 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 "oxygenaddeventfilter.h"
#include "oxygenstylehelper.h"
#include <QEvent>
#include <QObject>
#include <QSet>
#include <QWidget>
#include <QPaintEvent>
#include <KColorScheme>
namespace Oxygen
{
//* shadow manager
class FrameShadowFactory: public QObject
{
Q_OBJECT
public:
//* constructor
explicit FrameShadowFactory( QObject* parent ):
QObject( parent )
{}
//* destructor
virtual ~FrameShadowFactory( void )
{}
//* register widget
bool registerWidget( QWidget*, StyleHelper& );
//* unregister
void unregisterWidget( QWidget* );
//* true if widget is registered
bool isRegistered( const QWidget* widget ) const
{ return _registeredWidgets.contains( widget ); }
//* event filter
virtual bool eventFilter( QObject*, QEvent*);
//* set contrast
void setHasContrast( const QWidget* widget, bool ) const;
//* update state
void updateState( const QWidget*, bool focus, bool hover, qreal opacity, AnimationMode ) const;
//* update shadows geometry
void updateShadowsGeometry( const QObject*, QRect ) const;
protected:
//* install shadows on given widget
void installShadows( QWidget*, StyleHelper&, bool flat = false );
//* update shadows geometry
void updateShadowsGeometry( QObject* ) const;
//* remove shadows from widget
void removeShadows( QWidget* );
//* raise shadows
void raiseShadows( QObject* ) const;
//* update shadows
void update( QObject* ) const;
//* install shadow on given side
void installShadow( QWidget*, StyleHelper&, ShadowArea, bool flat = false ) const;
protected Q_SLOTS:
//* triggered by object destruction
void widgetDestroyed( QObject* );
private:
//* needed to block ChildAdded events when creating shadows
AddEventFilter _addEventFilter;
//* set of registered widgets
QSet<const QObject*> _registeredWidgets;
};
//* frame shadow
/*! this allows the shadow to be painted over the widgets viewport */
class FrameShadowBase: public QWidget
{
Q_OBJECT
public:
//* constructor
explicit FrameShadowBase( ShadowArea area ):
_area( area ),
_contrast( false )
{}
//* destructor
virtual ~FrameShadowBase( void )
{}
//* shadow area
void setShadowArea(ShadowArea area)
{ _area = area; }
//* shadow area
const ShadowArea& shadowArea() const
{ return _area; }
//* set contrast
void setHasContrast( bool value )
{
if( _contrast == value ) return;
_contrast = value;
}
//* true if contrast pixel is enabled
bool hasContrast( void ) const
{ return _contrast; }
//* update geometry
virtual void updateGeometry( void ) = 0;
//* update geometry
virtual void updateGeometry( QRect ) = 0;
//* update state
virtual void updateState( bool, bool, qreal, AnimationMode )
{}
protected:
//* initialization
virtual void init();
//* return viewport associated to parent widget
virtual QWidget* viewport( void ) const;
//* parent margins
/** offsets between update rect and parent widget rect. It is set via updateGeometry */
virtual const QMargins& margins( void ) const
{ return _margins; }
//* margins
/** offsets between update rect and parent widget rect. It is set via updateGeometry */
virtual void setMargins( const QMargins& margins )
{ _margins = margins; }
private:
//* shadow area
ShadowArea _area;
//* margins
/** offsets between update rect and parent widget rect. It is set via updateGeometry */
QMargins _margins;
//* contrast pixel
bool _contrast;
};
//* frame shadow
/*! this allows the shadow to be painted over the widgets viewport */
class SunkenFrameShadow : public FrameShadowBase
{
Q_OBJECT
public:
//* constructor
SunkenFrameShadow( ShadowArea area, StyleHelper& helper ):
FrameShadowBase( area ),
_helper( helper ),
_hasFocus( false ),
_mouseOver( false ),
_opacity( -1 ),
_mode( AnimationNone )
{ init(); }
//* destructor
virtual ~SunkenFrameShadow()
{}
//* update geometry
/** nothing is done. Rect must be passed explicitly */
virtual void updateGeometry( void )
{}
//* update geometry
virtual void updateGeometry( QRect );
//* update state
void updateState( bool focus, bool hover, qreal opacity, AnimationMode );
protected:
//* painting
virtual void paintEvent(QPaintEvent *);
private:
//* helper
StyleHelper& _helper;
//*@name widget state
//@{
bool _hasFocus;
bool _mouseOver;
qreal _opacity;
AnimationMode _mode;
};
//* frame shadow
/*! this allows the shadow to be painted over the widgets viewport */
class FlatFrameShadow : public FrameShadowBase
{
Q_OBJECT
public:
//* constructor
FlatFrameShadow( ShadowArea area, StyleHelper& helper ):
FrameShadowBase( area ),
_helper( helper )
{ init(); }
//* destructor
virtual ~FlatFrameShadow()
{}
//* update geometry
virtual void updateGeometry( void );
//* update geometry
virtual void updateGeometry( QRect );
protected:
//* painting
virtual void paintEvent(QPaintEvent *);
private:
//* helper
StyleHelper& _helper;
};
}
#endif
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