Differential D10170 Diff 27368 kstyle/breezeblurhelper.cpp

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kstyle/breezeblurhelper.cpp

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1		//////////////////////////////////////////////////////////////////////////////
2		// breezeblurhelper.cpp
3		// handle regions passed to kwin for blurring
4		// -------------------
5		//
6		// Copyright (C) 2018 Alex Nemeth <alex.nemeth329@gmail.com>
7		//
8		// Largely rewritten from Oxygen widget style
9		// Copyright (C) 2007 Thomas Luebking <thomas.luebking@web.de>
10		// Copyright (c) 2010 Hugo Pereira Da Costa <hugo.pereira@free.fr>
11		//
12		// Permission is hereby granted, free of charge, to any person obtaining a copy
13		// of this software and associated documentation files (the "Software"), to
14		// deal in the Software without restriction, including without limitation the
15		// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
16		// sell copies of the Software, and to permit persons to whom the Software is
17		// furnished to do so, subject to the following conditions:
18		//
19		// The above copyright notice and this permission notice shall be included in
20		// all copies or substantial portions of the Software.
21		//
22		// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23		// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24		// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
25		// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26		// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27		// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
28		// IN THE SOFTWARE.
29		//////////////////////////////////////////////////////////////////////////////
30
31		#include "breezeblurhelper.h"
32		#include "breezestyleconfigdata.h"
33
34		#include <KWindowEffects>
35
36		#include <QEvent>
37		#include <QVector>
38
39		namespace Breeze
40		{
41		//___________________________________________________________
42		BlurHelper::BlurHelper(QObject* parent):
43		QObject(parent)
44		{
45		}
46
	hpereiradacostaUnsubmitted Done helper argument is not needed hpereiradacosta: helper argument is not needed
47		//___________________________________________________________
48		void BlurHelper::registerWidget(QWidget* widget)
49		{
50		// install event filter
51		addEventFilter(widget);
52
53		// schedule shadow area repaint
54		update(widget);
55		}
56
57		//___________________________________________________________
58		void BlurHelper::unregisterWidget(QWidget* widget)
59		{
60		// remove event filter
61		widget->removeEventFilter(this);
62		}
63
64		//___________________________________________________________
65		bool BlurHelper::eventFilter(QObject* object, QEvent* event)
66		{
67		switch (event->type()) {
68		case QEvent::Hide:
69		case QEvent::Show:
70		case QEvent::Resize:
71		{
72		// cast to widget and check
73		QWidget* widget(qobject_cast<QWidget*>(object));
74
75		if (!widget)
76		break;
77
78		update(widget);
79		break;
80		}
81
82		default: break;
83		}
84
85		// never eat events
86		return false;
87		}
88
89		//___________________________________________________________
90		void BlurHelper::update(QWidget* widget) const
91		{
92		#if BREEZE_HAVE_X11
93		/*
94		directly from bespin code. Supposibly prevent playing with some 'pseudo-widgets'
95		that have winId matching some other -random- window
96		*/
97		if (!(widget->testAttribute(Qt::WA_WState_Created) \|\| widget->internalWinId()))
98		return;
99
100		KWindowEffects::enableBlurBehind(widget->winId(), true);
101
102		// force update
103		if (widget->isVisible()) {
104		widget->update();
105		}
106
107		#else
108		Q_UNUSED( widget )
109		#endif
110		}
111		}
	hpereiradacostaUnsubmitted Done ok. So this is awkward. The whole code (the whole class in fact), does nothing for KDE4 (because of KWindowEffects not being available). We should then not have the event filters installed, nor even the blur helper created, etc. Alternatively, one would need to duplicate the code from KWIndowEffect. as done in the original oxygen code. For KF5, it is definitly better to use KWindowsEffect. so fine. For kDE4 applications, not having the blur behind the translucent window is an issue (and there still are some kde4 applications around). So there, one should either duplicate the code (for this #ifdef branch only disable the blur (as now), and possibly also the transparency (in order not to endup with transparent menus and no blur). hpereiradacosta: ok. So this is awkward. The whole code (the whole class in fact), does nothing for KDE4…