summaryrefslogtreecommitdiffstats
path: root/examples/multimedia/videowidget/videowidget.cpp
blob: f73a52f23b720a287e8d41e7bb26ebfbbb3516f4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "videowidget.h"

#include "videowidgetsurface.h"

#include <QtMultimedia>

//! [0]
VideoWidget::VideoWidget(QWidget *parent)
    : QWidget(parent)
    , surface(0)
{
    setAutoFillBackground(false);
    setAttribute(Qt::WA_NoSystemBackground, true);
    setAttribute(Qt::WA_PaintOnScreen, true);

    QPalette palette = this->palette();
    palette.setColor(QPalette::Background, Qt::black);
    setPalette(palette);

    setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);

    surface = new VideoWidgetSurface(this);
}
//! [0]

//! [1]
VideoWidget::~VideoWidget()
{
    delete surface;
}
//! [1]

//! [2]
QSize VideoWidget::sizeHint() const
{
    return surface->surfaceFormat().sizeHint();
}
//! [2]


//! [3]
void VideoWidget::paintEvent(QPaintEvent *event)
{
    QPainter painter(this);

    if (surface->isActive()) {
        const QRect videoRect = surface->videoRect();

        if (!videoRect.contains(event->rect())) {
            QRegion region = event->region();
            region.subtract(videoRect);

            QBrush brush = palette().background();

            foreach (const QRect &rect, region.rects())
                painter.fillRect(rect, brush);
        }

        surface->paint(&painter);
    } else {
        painter.fillRect(event->rect(), palette().background());
    }
}
//! [3]

//! [4]
void VideoWidget::resizeEvent(QResizeEvent *event)
{
    QWidget::resizeEvent(event);

    surface->updateVideoRect();
}
//! [4]