Kstars

QProgressIndicator.cpp
1 /*
2 
3  This file is part of QProgressIndicator,
4  an open-source recent files menu widget
5 
6  SPDX-FileCopyrightText: 2009-2010 Morgan Leborgne
7  SPDX-License-Identifier: LGPL-3.0-or-later
8 */
9 
10 #include "QProgressIndicator.h"
11 
12 #include <QPainter>
13 
14 QProgressIndicator::QProgressIndicator(QWidget *parent)
15  : QWidget(parent)
16 {
17  setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
18  setFocusPolicy(Qt::NoFocus);
19 }
20 
22 {
23  return (m_timerId != -1);
24 }
25 
27 {
28  m_displayedWhenStopped = state;
29 
30  update();
31 }
32 
34 {
35  return m_displayedWhenStopped;
36 }
37 
39 {
40  m_angle = 0;
41 
42  if (m_timerId == -1)
43  m_timerId = startTimer(m_delay);
44 }
45 
47 {
48  if (m_timerId != -1)
49  killTimer(m_timerId);
50 
51  m_timerId = -1;
52 
53  update();
54 }
55 
57 {
58  if (m_timerId != -1)
59  killTimer(m_timerId);
60 
61  m_delay = delay;
62 
63  if (m_timerId != -1)
64  m_timerId = startTimer(m_delay);
65 }
66 
68 {
69  m_color = color;
70 
71  update();
72 }
73 
74 QSize QProgressIndicator::sizeHint() const
75 {
76  return QSize(20, 20);
77 }
78 
79 int QProgressIndicator::heightForWidth(int w) const
80 {
81  return w;
82 }
83 
84 void QProgressIndicator::timerEvent(QTimerEvent * /*event*/)
85 {
86  m_angle = (m_angle + 30) % 360;
87 
88  update();
89 }
90 
91 void QProgressIndicator::paintEvent(QPaintEvent * /*event*/)
92 {
93  if (!m_displayedWhenStopped && !isAnimated())
94  return;
95 
96  int width = qMin(this->width(), this->height());
97 
98  QPainter p(this);
99  p.setRenderHint(QPainter::Antialiasing);
100 
101  int outerRadius = (width - 1) * 0.5;
102  int innerRadius = (width - 1) * 0.5 * 0.38;
103 
104  int capsuleHeight = outerRadius - innerRadius;
105  int capsuleWidth = (width > 32) ? capsuleHeight * .23 : capsuleHeight * .35;
106  int capsuleRadius = capsuleWidth / 2;
107 
108  for (int i = 0; i < 12; i++)
109  {
110  QColor color = m_color;
111  color.setAlphaF(1.0f - (i / 12.0f));
112  p.setPen(Qt::NoPen);
113  p.setBrush(color);
114  p.save();
115  p.translate(rect().center());
116  p.rotate(m_angle - i * 30.0f);
117  p.drawRoundedRect(-capsuleWidth * 0.5, -(innerRadius + capsuleHeight), capsuleWidth, capsuleHeight,
118  capsuleRadius, capsuleRadius);
119  p.restore();
120  }
121 }
int startTimer(int interval, Qt::TimerType timerType)
void setDisplayedWhenStopped(bool state)
Sets whether the component hides itself when it is not animating.
void update()
bool isAnimated() const
Returns a Boolean value indicating whether the component is currently animated.
void startAnimation()
Starts the spin animation.
void setAlphaF(qreal alpha)
void killTimer(int id)
void setColor(const QColor &color)
Sets the color of the components to the given color.
void stopAnimation()
Stops the spin animation.
bool isDisplayedWhenStopped() const
Returns a Boolean value indicating whether the receiver shows itself even when it is not animating.
void setAnimationDelay(int delay)
Sets the delay between animation steps.
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