1// Copyright (C) 2017 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#include "qquickfusionbusyindicator_p.h"
5
6#include <QtGui/qpainter.h>
7
8QT_BEGIN_NAMESPACE
9
10QQuickFusionBusyIndicator::QQuickFusionBusyIndicator(QQuickItem *parent)
11 : QQuickPaintedItem(parent)
12{
13}
14
15QColor QQuickFusionBusyIndicator::color() const
16{
17 return m_color;
18}
19
20void QQuickFusionBusyIndicator::setColor(const QColor &color)
21{
22 if (color == m_color)
23 return;
24
25 m_color = color;
26 update();
27}
28
29bool QQuickFusionBusyIndicator::isRunning() const
30{
31 return isVisible();
32}
33
34void QQuickFusionBusyIndicator::setRunning(bool running)
35{
36 m_running = running;
37
38 if (m_running) {
39 setVisible(true);
40 update();
41 }
42 // Don't set visible to false if not running, because we use an opacity animation (in QML) to hide ourselves.
43}
44
45void QQuickFusionBusyIndicator::paint(QPainter *painter)
46{
47 const qreal w = width();
48 const qreal h = height();
49 if (w <= 0 || h <= 0 || !isRunning())
50 return;
51
52 const qreal sz = qMin(a: w, b: h);
53 const qreal dx = (w - sz) / 2;
54 const qreal dy = (h - sz) / 2;
55 const int hpw = qRound(d: qMax(a: qreal(1), b: sz / 14)) & -1;
56 const int pw = 2 * hpw;
57 const QRectF bounds(dx + hpw, dy + hpw, sz - pw - 1, sz - pw - 1);
58
59 QConicalGradient gradient;
60 gradient.setCenter(QPointF(dx + sz / 2, dy + sz / 2));
61 gradient.setColorAt(pos: 0, color: m_color);
62 gradient.setColorAt(pos: 0.1, color: m_color);
63 gradient.setColorAt(pos: 1, color: Qt::transparent);
64
65 painter->translate(dx: 0.5, dy: 0.5);
66 painter->setRenderHint(hint: QPainter::Antialiasing, on: true);
67 painter->setPen(QPen(gradient, pw, Qt::SolidLine));
68 painter->drawArc(rect: bounds, a: 0, alen: 360 * 16);
69 painter->setPen(QPen(m_color, pw, Qt::SolidLine, Qt::RoundCap));
70 painter->drawArc(rect: bounds, a: 0, alen: 20 * 16);
71}
72
73void QQuickFusionBusyIndicator::itemChange(ItemChange change, const ItemChangeData &data)
74{
75 QQuickPaintedItem::itemChange(change, data);
76
77 switch (change) {
78 case ItemOpacityHasChanged:
79 // If running is set to false and then true within a short period (QTBUG-85860), our
80 // OpacityAnimator cancels the 1 => 0 animation (which was for running being set to false),
81 // setting opacity to 0 and hence visible to false. This happens _after_ setRunning(true)
82 // was called, because the properties were set synchronously but the animation is
83 // asynchronous. To account for this situation, we only hide ourselves if we're not running.
84 if (qFuzzyIsNull(d: data.realValue) && !m_running)
85 setVisible(false);
86 break;
87 case ItemVisibleHasChanged:
88 update();
89 break;
90 default:
91 break;
92 }
93}
94
95QT_END_NAMESPACE
96
97#include "moc_qquickfusionbusyindicator_p.cpp"
98

source code of qtdeclarative/src/quickcontrols/fusion/impl/qquickfusionbusyindicator.cpp