File indexing completed on 2024-05-12 16:58:27

 /*
  * 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