aerothemeplasma/KWin/smod_kwin_theme/breeze/kstyle/breezeframeshadow.h

130 lines
2.7 KiB
C++

/*
* SPDX-FileCopyrightText: 2014 Hugo Pereira Da Costa <hugo.pereira@free.fr>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef breezeframeshadow_h
#define breezeframeshadow_h
#include "breeze.h"
#include "breezeaddeventfilter.h"
#include "breezehelper.h"
#include <QEvent>
#include <QObject>
#include <QSet>
#include <KColorScheme>
#include <QPaintEvent>
#include <QWidget>
namespace Breeze
{
//* shadow manager
class FrameShadowFactory : public QObject
{
Q_OBJECT
public:
//* constructor
explicit FrameShadowFactory(QObject *parent)
: QObject(parent)
{
}
//* register widget
bool registerWidget(QWidget *, Helper &);
//* unregister
void unregisterWidget(QWidget *);
//* true if widget is registered
bool isRegistered(const QWidget *widget) const
{
return _registeredWidgets.contains(widget);
}
//* event filter
bool eventFilter(QObject *, QEvent *) override;
//* 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 *, Helper &);
//* 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 *, Helper &, Side) 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 FrameShadow : public QWidget
{
Q_OBJECT
public:
//* constructor
FrameShadow(Side, Helper &);
//* update geometry
virtual void updateGeometry(QRect);
//* update state
void updateState(bool focus, bool hover, qreal opacity, AnimationMode);
protected:
//* painting
void paintEvent(QPaintEvent *) override;
//* return viewport associated to parent widget
QWidget *viewport() const;
private:
//* helper
Helper &_helper;
//* shadow area
Side _area;
//* margins
/** offsets between update rect and parent widget rect. It is set via updateGeometry */
QMargins _margins;
//*@name widget state
//@{
bool _hasFocus = false;
bool _mouseOver = false;
qreal _opacity = -1;
AnimationMode _mode = AnimationNone;
//@}
};
}
#endif