Differential D10170 Diff 26814 kstyle/breezeblurhelper.h

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kstyle/breezeblurhelper.h

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1		#ifndef breezeblurhelper_h
2		#define breezeblurhelper_h
3
4		//////////////////////////////////////////////////////////////////////////////
5		// breezeblurhelper.h
6		// handle regions passed to kwin for blurring
7		// -------------------
8		//
9		// Copyright (C) 2018 Alex Nemeth <alex.nemeth329@gmail.com>
10		//
11		// Largely rewritten from Oxygen widget style
12		// Copyright (C) 2007 Thomas Luebking <thomas.luebking@web.de>
13		// Copyright (c) 2010 Hugo Pereira Da Costa <hugo.pereira@free.fr>
14		//
15		// Permission is hereby granted, free of charge, to any person obtaining a copy
16		// of this software and associated documentation files (the "Software"), to
17		// deal in the Software without restriction, including without limitation the
18		// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
19		// sell copies of the Software, and to permit persons to whom the Software is
20		// furnished to do so, subject to the following conditions:
21		//
22		// The above copyright notice and this permission notice shall be included in
23		// all copies or substantial portions of the Software.
24		//
25		// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
26		// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
27		// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
28		// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
29		// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
30		// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
31		// IN THE SOFTWARE.
32		//////////////////////////////////////////////////////////////////////////////
33
34		#include "breeze.h"
35		#include "breezehelper.h"
36
37		#include <QBasicTimer>
38		#include <QHash>
39		#include <QObject>
40		#include <QSet>
41		#include <QTimerEvent>
42
43		#include <QMenu>
44		#include <QRegion>
45
46		#if BREEZE_HAVE_X11
47		#include <xcb/xcb.h>
48		#endif
49
50		namespace Breeze
51		{
52		class BlurHelper: public QObject
53		{
54
	hpereiradacostaUnsubmitted Done helper argument is not needed hpereiradacosta: helper argument is not needed
55		Q_OBJECT
56
57		public:
58
59		//! constructor
60		BlurHelper( QObject*, Helper& );
61
62		//! destructor
63		virtual ~BlurHelper( void )
64		{}
65
66		//! register widget
67		void registerWidget( QWidget* );
68
69		//! register widget
70		void unregisterWidget( QWidget* );
71
72		//! event filter
73		bool eventFilter( QObject, QEvent ) ;
74
75		protected:
76
77		//! timer event
78		/! used to perform delayed blur region update of pending widgets /
79		void timerEvent( QTimerEvent* event )
80		{
81
	hpereiradacostaUnsubmitted Done this can go. No more slots :) hpereiradacosta: this can go. No more slots :)
82		if( event->timerId() == _timer.timerId() )
83		{
84		_timer.stop();
85		update();
86		} else QObject::timerEvent( event );
	hpereiradacostaUnsubmitted Done this can go hpereiradacosta: this can go
87
88		}
89
90		//! install event filter to object, in a unique way
91		void addEventFilter( QObject* object )
92		{
93		object->removeEventFilter( this );
94		object->installEventFilter( this );
95		}
96
97		//! update blur region for all pending widgets
98		void update( void )
99		{
100		foreach( const WidgetPointer& widget, _pendingWidgets ) {
101		if (widget)
102		update(widget.data());
103		}
104
105		_pendingWidgets.clear();
106		}
107
108		//! update blur regions for given widget
109		void update( QWidget* ) const;
110
111		protected Q_SLOTS:
112
113		//! wiget destroyed
114		void widgetDestroyed( QObject* object )
115		{ _widgets.remove( object ); }
116
117		private:
118
119		//* helper
120		Helper _helper;
121
122		//! list of widgets for which blur region must be updated
123		using WidgetPointer = WeakPointer<QWidget>;
124		using WidgetSet = QHash<QWidget*, WidgetPointer>;
125		WidgetSet _pendingWidgets;
126
127		//! set of registered widgets
128		QSet<const QObject*> _widgets;
129
130		//! delayed update timer
131		QBasicTimer _timer;
132
133
134		};
135
136		}
137
138		#endif
	hpereiradacostaUnsubmitted Done Because the use of this class is much simplified wrt the original one, it can be significantly simplified: _timer (and timerEvent) are unnecessary. Then update() could be removed, as well as _widgets, as well as the widgetDestroyed callback. Then update(widget) could be called directly in the event filter. hpereiradacosta: Because the use of this class is much simplified wrt the original one, it can be significantly…