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/*
This file is part of the KDE libraries
SPDX-FileCopyrightText: 2013 Nicolás Alvarez <nicolas.alvarez@gmail.com>
SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include <QApplication>
#include <QPushButton>
#include <QVBoxLayout>
#include <QWidget>
#include <kwindoweffects.h>
class BlurTestWindow : public QWidget
{
public:
BlurTestWindow();
void resizeEvent(QResizeEvent *) override;
private:
QPushButton *m_btnNothing;
QPushButton *m_btnFullWindow;
QPushButton *m_btnRect;
QPushButton *m_btnEllipse;
QWidget *m_area;
enum { Nothing, FullWindow, Rect, Ellipse } m_state;
void setWindowAlpha(int alpha);
void disableBlur();
void enableBlur();
void enableBlurRect();
void enableBlurEllipse();
};
BlurTestWindow::BlurTestWindow()
{
m_state = Nothing;
setAttribute(Qt::WA_TranslucentBackground);
setAttribute(Qt::WA_NoSystemBackground, false);
setWindowAlpha(192);
m_btnNothing = new QPushButton("Nothing");
m_btnFullWindow = new QPushButton("Full window");
m_btnRect = new QPushButton("Rectangle");
m_btnEllipse = new QPushButton("Ellipse");
m_area = new QWidget;
m_area->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
connect(m_btnNothing, &QPushButton::clicked, this, &BlurTestWindow::disableBlur);
connect(m_btnFullWindow, &QPushButton::clicked, this, &BlurTestWindow::enableBlur);
connect(m_btnRect, &QPushButton::clicked, this, &BlurTestWindow::enableBlurRect);
connect(m_btnEllipse, &QPushButton::clicked, this, &BlurTestWindow::enableBlurEllipse);
QVBoxLayout *layout = new QVBoxLayout(this);
layout->addWidget(m_btnNothing);
layout->addWidget(m_btnFullWindow);
layout->addWidget(m_btnRect);
layout->addWidget(m_btnEllipse);
layout->addWidget(m_area);
winId(); // force creation of the associated window
}
void BlurTestWindow::disableBlur()
{
m_state = Nothing;
KWindowEffects::enableBlurBehind(windowHandle(), false);
repaint();
}
void BlurTestWindow::enableBlur()
{
m_state = FullWindow;
KWindowEffects::enableBlurBehind(windowHandle(), true);
repaint();
}
void BlurTestWindow::enableBlurRect()
{
m_state = Rect;
QRegion rgn(m_area->geometry());
KWindowEffects::enableBlurBehind(windowHandle(), true, rgn);
repaint();
}
void BlurTestWindow::enableBlurEllipse()
{
m_state = Ellipse;
QRegion rgn(m_area->geometry(), QRegion::Ellipse);
KWindowEffects::enableBlurBehind(windowHandle(), true, rgn);
repaint();
}
void BlurTestWindow::resizeEvent(QResizeEvent *)
{
if (m_state == Rect) {
enableBlurRect();
} else if (m_state == Ellipse) {
enableBlurEllipse();
}
}
void BlurTestWindow::setWindowAlpha(int alpha)
{
QPalette pal = this->palette();
QColor windowColor = pal.color(QPalette::Window);
windowColor.setAlpha(alpha);
pal.setColor(QPalette::Window, windowColor);
this->setPalette(pal);
}
int main(int argc, char **argv)
{
QApplication app(argc, argv);
BlurTestWindow wnd;
wnd.show();
return app.exec();
}
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