1 /*
2 This file is part of the KDE libraries
3 SPDX-FileCopyrightText: 2013 Nicolás Alvarez <nicolas.alvarez@gmail.com>
4
5 SPDX-License-Identifier: LGPL-2.1-or-later
6 */
7
8 #include <QApplication>
9 #include <QPushButton>
10 #include <QVBoxLayout>
11 #include <QWidget>
12
13 #include <kwindoweffects.h>
14
15 class BlurTestWindow : public QWidget
16 {
17 public:
18 BlurTestWindow();
19
20 void resizeEvent(QResizeEvent *) override;
21
22 private:
23 QPushButton *m_btnNothing;
24 QPushButton *m_btnFullWindow;
25 QPushButton *m_btnRect;
26 QPushButton *m_btnEllipse;
27 QWidget *m_area;
28
29 enum { Nothing, FullWindow, Rect, Ellipse } m_state;
30
31 void setWindowAlpha(int alpha);
32
33 void disableBlur();
34 void enableBlur();
35 void enableBlurRect();
36 void enableBlurEllipse();
37 };
38
BlurTestWindow()39 BlurTestWindow::BlurTestWindow()
40 {
41 m_state = Nothing;
42 setAttribute(Qt::WA_TranslucentBackground);
43 setAttribute(Qt::WA_NoSystemBackground, false);
44 setWindowAlpha(192);
45
46 m_btnNothing = new QPushButton("Nothing");
47 m_btnFullWindow = new QPushButton("Full window");
48 m_btnRect = new QPushButton("Rectangle");
49 m_btnEllipse = new QPushButton("Ellipse");
50
51 m_area = new QWidget;
52 m_area->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
53
54 connect(m_btnNothing, &QPushButton::clicked, this, &BlurTestWindow::disableBlur);
55 connect(m_btnFullWindow, &QPushButton::clicked, this, &BlurTestWindow::enableBlur);
56 connect(m_btnRect, &QPushButton::clicked, this, &BlurTestWindow::enableBlurRect);
57 connect(m_btnEllipse, &QPushButton::clicked, this, &BlurTestWindow::enableBlurEllipse);
58
59 QVBoxLayout *layout = new QVBoxLayout(this);
60 layout->addWidget(m_btnNothing);
61 layout->addWidget(m_btnFullWindow);
62 layout->addWidget(m_btnRect);
63 layout->addWidget(m_btnEllipse);
64 layout->addWidget(m_area);
65
66 winId(); // force creation of the associated window
67 }
68
disableBlur()69 void BlurTestWindow::disableBlur()
70 {
71 m_state = Nothing;
72 KWindowEffects::enableBlurBehind(windowHandle(), false);
73 repaint();
74 }
enableBlur()75 void BlurTestWindow::enableBlur()
76 {
77 m_state = FullWindow;
78 KWindowEffects::enableBlurBehind(windowHandle(), true);
79 repaint();
80 }
enableBlurRect()81 void BlurTestWindow::enableBlurRect()
82 {
83 m_state = Rect;
84 QRegion rgn(m_area->geometry());
85 KWindowEffects::enableBlurBehind(windowHandle(), true, rgn);
86 repaint();
87 }
enableBlurEllipse()88 void BlurTestWindow::enableBlurEllipse()
89 {
90 m_state = Ellipse;
91 QRegion rgn(m_area->geometry(), QRegion::Ellipse);
92 KWindowEffects::enableBlurBehind(windowHandle(), true, rgn);
93 repaint();
94 }
95
resizeEvent(QResizeEvent *)96 void BlurTestWindow::resizeEvent(QResizeEvent *)
97 {
98 if (m_state == Rect) {
99 enableBlurRect();
100 } else if (m_state == Ellipse) {
101 enableBlurEllipse();
102 }
103 }
104
setWindowAlpha(int alpha)105 void BlurTestWindow::setWindowAlpha(int alpha)
106 {
107 QPalette pal = this->palette();
108 QColor windowColor = pal.color(QPalette::Window);
109 windowColor.setAlpha(alpha);
110 pal.setColor(QPalette::Window, windowColor);
111 this->setPalette(pal);
112 }
113
main(int argc,char ** argv)114 int main(int argc, char **argv)
115 {
116 QApplication app(argc, argv);
117
118 BlurTestWindow wnd;
119 wnd.show();
120
121 return app.exec();
122 }
123