aerothemeplasma/KWin/smod_kwin_theme/breeze/kstyle/breezeblurhelper.cpp

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//////////////////////////////////////////////////////////////////////////////
// breezeblurhelper.cpp
// handle regions passed to kwin for blurring
// -------------------
//
// SPDX-FileCopyrightText: 2018 Alex Nemeth <alex.nemeth329@gmail.com>
//
// Largely rewritten from Oxygen widget style
// SPDX-FileCopyrightText: 2007 Thomas Luebking <thomas.luebking@web.de>
// SPDX-FileCopyrightText: 2010 Hugo Pereira Da Costa <hugo.pereira@free.fr>
//
// SPDX-License-Identifier: MIT
//////////////////////////////////////////////////////////////////////////////
#include "breezeblurhelper.h"
#include "breezestyleconfigdata.h"
#include <KWindowEffects>
#include <QEvent>
#include <QVector>
namespace Breeze
{
//___________________________________________________________
BlurHelper::BlurHelper(QObject *parent)
: QObject(parent)
{
}
//___________________________________________________________
void BlurHelper::registerWidget(QWidget *widget)
{
// install event filter
addEventFilter(widget);
// schedule shadow area repaint
update(widget);
}
//___________________________________________________________
void BlurHelper::unregisterWidget(QWidget *widget)
{
// remove event filter
widget->removeEventFilter(this);
}
//___________________________________________________________
bool BlurHelper::eventFilter(QObject *object, QEvent *event)
{
switch (event->type()) {
case QEvent::Hide:
case QEvent::Show:
case QEvent::Resize: {
// cast to widget and check
QWidget *widget(qobject_cast<QWidget *>(object));
if (!widget) {
break;
}
update(widget);
break;
}
default:
break;
}
// never eat events
return false;
}
//___________________________________________________________
void BlurHelper::update(QWidget *widget) const
{
/*
directly from bespin code. Supposedly prevent playing with some 'pseudo-widgets'
that have winId matching some other -random- window
*/
if (!(widget->testAttribute(Qt::WA_WState_Created) || widget->internalWinId())) {
return;
}
widget->winId(); // force creation of the window handle
KWindowEffects::enableBlurBehind(widget->windowHandle(), true);
// force update
if (widget->isVisible()) {
widget->update();
}
}
}