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#ifndef oxygenblurhelper_h
#define oxygenblurhelper_h
//////////////////////////////////////////////////////////////////////////////
// oxygenblurhelper.h
// handle regions passed to kwin for blurring
// -------------------
//
// Copyright (c) 2010 Hugo Pereira Da Costa <hugo.pereira@free.fr>
//
// Loosely inspired (and largely rewritten) from BeSpin style
// Copyright (C) 2007 Thomas Luebking <thomas.luebking@web.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 "oxygenstylehelper.h"
#include "oxygen.h"
#include <QBasicTimer>
#include <QHash>
#include <QObject>
#include <QSet>
#include <QTimerEvent>
#include <QDockWidget>
#include <QMenu>
#include <QRegion>
#include <QToolBar>
#if OXYGEN_HAVE_X11
#include <xcb/xcb.h>
#endif
namespace Oxygen
{
class BlurHelper: public QObject
{
Q_OBJECT
public:
//* constructor
BlurHelper( QObject*, StyleHelper& );
//* enable state
void setEnabled( bool value )
{ _enabled = value; }
//* enabled
bool enabled( void ) const
{ return _enabled; }
//* register widget
void registerWidget( QWidget* );
//* register widget
void unregisterWidget( QWidget* );
//* event filter
bool eventFilter( QObject*, QEvent* ) override;
protected:
//* timer event
/** used to perform delayed blur region update of pending widgets */
void timerEvent( QTimerEvent* event ) override
{
if( event->timerId() == _timer.timerId() )
{
_timer.stop();
update();
} else QObject::timerEvent( event );
}
private Q_SLOTS:
//* wiget destroyed
void widgetDestroyed( QObject* object )
{ _widgets.remove( object ); }
private:
//* install event filter to object, in a unique way
void addEventFilter( QObject* object )
{
object->removeEventFilter( this );
object->installEventFilter( this );
}
//* get list of blur-behind regions matching a given widget
QRegion blurRegion( QWidget* ) const;
//* trim blur region to remove unnecessary areas (recursive)
void trimBlurRegion( QWidget*, QWidget*, QRegion& ) const;
//* update blur region for all pending widgets
void update( void )
{
foreach( const WidgetPointer& widget, _pendingWidgets )
{ if( widget ) update( widget.data() ); }
_pendingWidgets.clear();
}
//* update blur regions for given widget
void update( QWidget* ) const;
//* clear blur regions for given widget
void clear( QWidget* ) const;
//* returns true if a given widget is opaque
bool isOpaque( const QWidget* widget ) const;
//* true if widget is a transparent window
/** some additional checks are performed to make sure stuff like plasma tooltips
don't get their blur region overwritten */
bool isTransparent( const QWidget* widget ) const;
//* helper
StyleHelper& _helper;
//* enability
bool _enabled;
//* list of widgets for which blur region must be updated
using WidgetPointer = WeakPointer<QWidget>;
using WidgetSet = QHash<QWidget*, WidgetPointer>;
WidgetSet _pendingWidgets;
//* set of registered widgets
QSet<const QObject*> _widgets;
//* delayed update timer
QBasicTimer _timer;
#if OXYGEN_HAVE_X11
//* blur atom
xcb_atom_t _blurAtom;
xcb_atom_t _opaqueAtom;
#endif
};
}
#endif
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