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36
37#include "qquickfusionbusyindicator_p.h"
38
39#include <QtGui/qpainter.h>
40
41QT_BEGIN_NAMESPACE
42
43QQuickFusionBusyIndicator::QQuickFusionBusyIndicator(QQuickItem *parent)
44 : QQuickPaintedItem(parent)
45{
46}
47
48QColor QQuickFusionBusyIndicator::color() const
49{
50 return m_color;
51}
52
53void QQuickFusionBusyIndicator::setColor(const QColor &color)
54{
55 if (color == m_color)
56 return;
57
58 m_color = color;
59 update();
60}
61
62bool QQuickFusionBusyIndicator::isRunning() const
63{
64 return isVisible();
65}
66
67void QQuickFusionBusyIndicator::setRunning(bool running)
68{
69 if (running) {
70 setVisible(true);
71 update();
72 }
73}
74
75void QQuickFusionBusyIndicator::paint(QPainter *painter)
76{
77 const qreal w = width();
78 const qreal h = height();
79 if (w <= 0 || h <= 0 || !isRunning())
80 return;
81
82 const qreal sz = qMin(a: w, b: h);
83 const qreal dx = (w - sz) / 2;
84 const qreal dy = (h - sz) / 2;
85 const int hpw = qRound(d: qMax(a: qreal(1), b: sz / 14)) & -1;
86 const int pw = 2 * hpw;
87 const QRectF bounds(dx + hpw, dy + hpw, sz - pw - 1, sz - pw - 1);
88
89 QConicalGradient gradient;
90 gradient.setCenter(QPointF(dx + sz / 2, dy + sz / 2));
91 gradient.setColorAt(pos: 0, color: m_color);
92 gradient.setColorAt(pos: 0.1, color: m_color);
93 gradient.setColorAt(pos: 1, color: Qt::transparent);
94
95 painter->translate(dx: 0.5, dy: 0.5);
96 painter->setRenderHint(hint: QPainter::Antialiasing, on: true);
97 painter->setPen(QPen(gradient, pw, Qt::SolidLine));
98 painter->drawArc(rect: bounds, a: 0, alen: 360 * 16);
99 painter->setPen(QPen(m_color, pw, Qt::SolidLine, Qt::RoundCap));
100 painter->drawArc(rect: bounds, a: 0, alen: 20 * 16);
101}
102
103void QQuickFusionBusyIndicator::itemChange(ItemChange change, const ItemChangeData &data)
104{
105 QQuickPaintedItem::itemChange(change, data);
106
107 if (change == ItemOpacityHasChanged && qFuzzyIsNull(d: data.realValue))
108 setVisible(false);
109}
110
111QT_END_NAMESPACE
112

source code of qtquickcontrols2/src/imports/controls/fusion/qquickfusionbusyindicator.cpp