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
|
// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "progressbar.h"
#include <QPainter>
ProgressBar::ProgressBar(QWidget *parent)
: QWidget(parent),
m_bufferLength(0),
m_recordPosition(0),
m_playPosition(0),
m_windowPosition(0),
m_windowLength(0)
{
setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
setMinimumHeight(30);
#ifdef SUPERIMPOSE_PROGRESS_ON_WAVEFORM
setAutoFillBackground(false);
#endif
}
ProgressBar::~ProgressBar() = default;
void ProgressBar::reset()
{
m_bufferLength = 0;
m_recordPosition = 0;
m_playPosition = 0;
m_windowPosition = 0;
m_windowLength = 0;
update();
}
void ProgressBar::paintEvent(QPaintEvent * /*event*/)
{
QPainter painter(this);
QColor bufferColor(0, 0, 255);
QColor windowColor(0, 255, 0);
#ifdef SUPERIMPOSE_PROGRESS_ON_WAVEFORM
bufferColor.setAlphaF(0.5);
windowColor.setAlphaF(0.5);
#else
painter.fillRect(rect(), Qt::black);
#endif
if (m_bufferLength) {
QRect bar = rect();
const qreal play = qreal(m_playPosition) / m_bufferLength;
bar.setLeft(rect().left() + play * rect().width());
const qreal record = qreal(m_recordPosition) / m_bufferLength;
bar.setRight(rect().left() + record * rect().width());
painter.fillRect(bar, bufferColor);
QRect window = rect();
const qreal windowLeft = qreal(m_windowPosition) / m_bufferLength;
window.setLeft(rect().left() + windowLeft * rect().width());
const qreal windowWidth = qreal(m_windowLength) / m_bufferLength;
window.setWidth(windowWidth * rect().width());
painter.fillRect(window, windowColor);
}
}
void ProgressBar::bufferLengthChanged(qint64 bufferSize)
{
m_bufferLength = bufferSize;
m_recordPosition = 0;
m_playPosition = 0;
m_windowPosition = 0;
m_windowLength = 0;
repaint();
}
void ProgressBar::recordPositionChanged(qint64 recordPosition)
{
Q_ASSERT(recordPosition >= 0);
Q_ASSERT(recordPosition <= m_bufferLength);
m_recordPosition = recordPosition;
repaint();
}
void ProgressBar::playPositionChanged(qint64 playPosition)
{
Q_ASSERT(playPosition >= 0);
Q_ASSERT(playPosition <= m_bufferLength);
m_playPosition = playPosition;
repaint();
}
void ProgressBar::windowChanged(qint64 position, qint64 length)
{
Q_ASSERT(position >= 0);
Q_ASSERT(position <= m_bufferLength);
Q_ASSERT(position + length <= m_bufferLength);
m_windowPosition = position;
m_windowLength = length;
repaint();
}
#include "moc_progressbar.cpp"
|