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36 | |
37 | #include "qquickfusionknob_p.h" |
38 | |
39 | #include <QtCore/qmath.h> |
40 | #include <QtGui/qpainter.h> |
41 | |
42 | QT_BEGIN_NAMESPACE |
43 | |
44 | QQuickFusionKnob::QQuickFusionKnob(QQuickItem *parent) |
45 | : QQuickPaintedItem(parent) |
46 | { |
47 | } |
48 | |
49 | QPalette QQuickFusionKnob::palette() const |
50 | { |
51 | return m_palette; |
52 | } |
53 | |
54 | void QQuickFusionKnob::setPalette(const QPalette &palette) |
55 | { |
56 | if (palette == m_palette) |
57 | return; |
58 | |
59 | m_palette = palette; |
60 | update(); |
61 | } |
62 | |
63 | // extracted from QStyleHelper::drawDial() |
64 | void QQuickFusionKnob::paint(QPainter *painter) |
65 | { |
66 | const qreal w = width(); |
67 | const qreal h = height(); |
68 | if (w <= 0 || h <= 0) |
69 | return; |
70 | |
71 | QColor color = m_palette.color(cr: QPalette::Button); |
72 | color.setHsv(h: color.hue(), |
73 | s: qMin(a: 140, b: color .saturation()), |
74 | v: qMax(a: 180, b: color.value())); |
75 | color = color.lighter(f: 104); |
76 | color.setAlphaF(qreal(0.8)); |
77 | |
78 | const qreal sz = qMin(a: w, b: h); |
79 | QRectF rect(0, 0, sz, sz); |
80 | rect.moveCenter(p: QPointF(w / 2.0, h / 2.0)); |
81 | const QPointF center = rect.center(); |
82 | |
83 | QRadialGradient gradient(center.x() + rect.width() / 2, |
84 | center.y() + rect.width(), |
85 | rect.width() * 2, |
86 | center.x(), center.y()); |
87 | gradient.setColorAt(pos: 1, color: color.darker(f: 140)); |
88 | gradient.setColorAt(pos: qreal(0.4), color: color.darker(f: 120)); |
89 | gradient.setColorAt(pos: 0, color: color.darker(f: 110)); |
90 | |
91 | painter->setRenderHint(hint: QPainter::Antialiasing); |
92 | painter->setBrush(gradient); |
93 | painter->setPen(QColor(255, 255, 255, 150)); |
94 | painter->drawEllipse(r: rect); |
95 | painter->setPen(QColor(0, 0, 0, 80)); |
96 | painter->drawEllipse(r: rect.adjusted(xp1: 1, yp1: 1, xp2: -1, yp2: -1)); |
97 | } |
98 | |
99 | QT_END_NAMESPACE |
100 | |