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
/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "UBSpinningWheel.h"
#include <QtGui>
#include "core/memcheck.h"
UBSpinningWheel::UBSpinningWheel(QWidget *parent)
: QWidget(parent)
, mPosition(9)
, mTimerID(0)
{
// NOOP
}
UBSpinningWheel::~UBSpinningWheel()
{
stopAnimation();
}
QSize UBSpinningWheel::sizeHint() const
{
return QSize(16, 16);
}
void UBSpinningWheel::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event);
qreal side = qMin(width() / 2, height() / 2);
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
painter.translate(width() / 2, height() / 2);
QPen pen;
pen.setWidthF(side / 6.5);
pen.setCapStyle(Qt::RoundCap);
painter.setPen(pen);
painter.rotate(30 * (mPosition % 12));
for(int i = 0; i < 12; i++)
{
painter.drawLine(QPointF(side / 2, 0), QPointF(0.9 * side, 0));
painter.rotate(30);
QColor color = pen.color();
color.setAlphaF(0.25 + (i / 16.));
pen.setColor(color);
painter.setPen(pen);
}
}
void UBSpinningWheel::startAnimation()
{
if (mTimerID == 0)
{
mTimerID = startTimer(42);
}
}
void UBSpinningWheel::stopAnimation()
{
if (mTimerID != 0)
{
killTimer(mTimerID);
mTimerID = 0;
}
}
void UBSpinningWheel::timerEvent(QTimerEvent *event)
{
Q_UNUSED(event);
mPosition.ref();
update();
}