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50 | |
51 | #include "analogclock.h" |
52 | |
53 | #include <QPainter> |
54 | #include <QTime> |
55 | #include <QTimer> |
56 | |
57 | //! [0] //! [1] |
58 | AnalogClock::AnalogClock(QWidget *parent) |
59 | //! [0] //! [2] |
60 | : QWidget(parent) |
61 | //! [2] //! [3] |
62 | { |
63 | //! [3] //! [4] |
64 | QTimer *timer = new QTimer(this); |
65 | //! [4] //! [5] |
66 | connect(sender: timer, signal: &QTimer::timeout, receiver: this, slot: QOverload<>::of(ptr: &AnalogClock::update)); |
67 | //! [5] //! [6] |
68 | timer->start(msec: 1000); |
69 | //! [6] |
70 | |
71 | setWindowTitle(tr(s: "Analog Clock" )); |
72 | resize(w: 200, h: 200); |
73 | //! [7] |
74 | } |
75 | //! [1] //! [7] |
76 | |
77 | //! [8] //! [9] |
78 | void AnalogClock::paintEvent(QPaintEvent *) |
79 | //! [8] //! [10] |
80 | { |
81 | static const QPoint hourHand[3] = { |
82 | QPoint(7, 8), |
83 | QPoint(-7, 8), |
84 | QPoint(0, -40) |
85 | }; |
86 | static const QPoint minuteHand[3] = { |
87 | QPoint(7, 8), |
88 | QPoint(-7, 8), |
89 | QPoint(0, -70) |
90 | }; |
91 | |
92 | QColor hourColor(127, 0, 127); |
93 | QColor minuteColor(0, 127, 127, 191); |
94 | |
95 | int side = qMin(a: width(), b: height()); |
96 | QTime time = QTime::currentTime(); |
97 | //! [10] |
98 | |
99 | //! [11] |
100 | QPainter painter(this); |
101 | //! [11] //! [12] |
102 | painter.setRenderHint(hint: QPainter::Antialiasing); |
103 | //! [12] //! [13] |
104 | painter.translate(dx: width() / 2, dy: height() / 2); |
105 | //! [13] //! [14] |
106 | painter.scale(sx: side / 200.0, sy: side / 200.0); |
107 | //! [9] //! [14] |
108 | |
109 | //! [15] |
110 | painter.setPen(Qt::NoPen); |
111 | //! [15] //! [16] |
112 | painter.setBrush(hourColor); |
113 | //! [16] |
114 | |
115 | //! [17] //! [18] |
116 | painter.save(); |
117 | //! [17] //! [19] |
118 | painter.rotate(a: 30.0 * ((time.hour() + time.minute() / 60.0))); |
119 | painter.drawConvexPolygon(points: hourHand, pointCount: 3); |
120 | painter.restore(); |
121 | //! [18] //! [19] |
122 | |
123 | //! [20] |
124 | painter.setPen(hourColor); |
125 | //! [20] //! [21] |
126 | |
127 | for (int i = 0; i < 12; ++i) { |
128 | painter.drawLine(x1: 88, y1: 0, x2: 96, y2: 0); |
129 | painter.rotate(a: 30.0); |
130 | } |
131 | //! [21] |
132 | |
133 | //! [22] |
134 | painter.setPen(Qt::NoPen); |
135 | //! [22] //! [23] |
136 | painter.setBrush(minuteColor); |
137 | |
138 | //! [24] |
139 | painter.save(); |
140 | painter.rotate(a: 6.0 * (time.minute() + time.second() / 60.0)); |
141 | painter.drawConvexPolygon(points: minuteHand, pointCount: 3); |
142 | painter.restore(); |
143 | //! [23] //! [24] |
144 | |
145 | //! [25] |
146 | painter.setPen(minuteColor); |
147 | //! [25] //! [26] |
148 | |
149 | //! [27] |
150 | for (int j = 0; j < 60; ++j) { |
151 | if ((j % 5) != 0) |
152 | painter.drawLine(x1: 92, y1: 0, x2: 96, y2: 0); |
153 | painter.rotate(a: 6.0); |
154 | } |
155 | //! [27] |
156 | } |
157 | //! [26] |
158 | |