1 | /**************************************************************************** |
2 | ** |
3 | ** Copyright (C) 2016 The Qt Company Ltd. |
4 | ** Contact: https://www.qt.io/licensing/ |
5 | ** |
6 | ** This file is part of the QtScxml module of the Qt Toolkit. |
7 | ** |
8 | ** $QT_BEGIN_LICENSE:BSD$ |
9 | ** Commercial License Usage |
10 | ** Licensees holding valid commercial Qt licenses may use this file in |
11 | ** accordance with the commercial license agreement provided with the |
12 | ** Software or, alternatively, in accordance with the terms contained in |
13 | ** a written agreement between you and The Qt Company. For licensing terms |
14 | ** and conditions see https://www.qt.io/terms-conditions. For further |
15 | ** information use the contact form at https://www.qt.io/contact-us. |
16 | ** |
17 | ** BSD License Usage |
18 | ** Alternatively, you may use this file under the terms of the BSD license |
19 | ** as follows: |
20 | ** |
21 | ** "Redistribution and use in source and binary forms, with or without |
22 | ** modification, are permitted provided that the following conditions are |
23 | ** met: |
24 | ** * Redistributions of source code must retain the above copyright |
25 | ** notice, this list of conditions and the following disclaimer. |
26 | ** * Redistributions in binary form must reproduce the above copyright |
27 | ** notice, this list of conditions and the following disclaimer in |
28 | ** the documentation and/or other materials provided with the |
29 | ** distribution. |
30 | ** * Neither the name of The Qt Company Ltd nor the names of its |
31 | ** contributors may be used to endorse or promote products derived |
32 | ** from this software without specific prior written permission. |
33 | ** |
34 | ** |
35 | ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
36 | ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
37 | ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
38 | ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
39 | ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
40 | ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
41 | ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
42 | ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
43 | ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
44 | ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
45 | ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." |
46 | ** |
47 | ** $QT_END_LICENSE$ |
48 | ** |
49 | ****************************************************************************/ |
50 | |
51 | #include "trafficlight.h" |
52 | |
53 | #include <QPainter> |
54 | #include <QVBoxLayout> |
55 | |
56 | class TrafficLightWidget : public QWidget |
57 | { |
58 | public: |
59 | TrafficLightWidget(QWidget *parent = nullptr) |
60 | : QWidget(parent), m_background(QLatin1String(":/background.png" )) |
61 | { |
62 | QVBoxLayout *vbox = new QVBoxLayout(this); |
63 | vbox->setContentsMargins(left: 0, top: 40, right: 0, bottom: 80); |
64 | m_red = new LightWidget(QLatin1String(":/red.png" )); |
65 | vbox->addWidget(m_red, stretch: 0, alignment: Qt::AlignHCenter); |
66 | m_yellow = new LightWidget(QLatin1String(":/yellow.png" )); |
67 | vbox->addWidget(m_yellow, stretch: 0, alignment: Qt::AlignHCenter); |
68 | m_green = new LightWidget(QLatin1String(":/green.png" )); |
69 | vbox->addWidget(m_green, stretch: 0, alignment: Qt::AlignHCenter); |
70 | setLayout(vbox); |
71 | } |
72 | |
73 | LightWidget *redLight() const |
74 | { return m_red; } |
75 | LightWidget *yellowLight() const |
76 | { return m_yellow; } |
77 | LightWidget *greenLight() const |
78 | { return m_green; } |
79 | |
80 | void paintEvent(QPaintEvent *) override |
81 | { |
82 | QPainter painter(this); |
83 | painter.setRenderHint(hint: QPainter::Antialiasing); |
84 | painter.drawImage(x: 0, y: 0, image: m_background); |
85 | } |
86 | |
87 | QSize sizeHint() const override |
88 | { |
89 | return m_background.size(); |
90 | } |
91 | |
92 | private: |
93 | QImage m_background; |
94 | LightWidget *m_red; |
95 | LightWidget *m_yellow; |
96 | LightWidget *m_green; |
97 | }; |
98 | |
99 | TrafficLight::TrafficLight(QScxmlStateMachine *machine, QWidget *parent) |
100 | : QWidget(parent) |
101 | , m_machine(machine) |
102 | { |
103 | TrafficLightWidget *widget = new TrafficLightWidget(this); |
104 | setFixedSize(widget->sizeHint()); |
105 | |
106 | machine->connectToState(QStringLiteral("red" ), |
107 | receiver: widget->redLight(), method: &LightWidget::switchLight); |
108 | machine->connectToState(QStringLiteral("redGoingGreen" ), |
109 | receiver: widget->redLight(), method: &LightWidget::switchLight); |
110 | machine->connectToState(QStringLiteral("yellow" ), |
111 | receiver: widget->yellowLight(), method: &LightWidget::switchLight); |
112 | machine->connectToState(QStringLiteral("blinking" ), |
113 | receiver: widget->yellowLight(), method: &LightWidget::switchLight); |
114 | machine->connectToState(QStringLiteral("green" ), |
115 | receiver: widget->greenLight(), method: &LightWidget::switchLight); |
116 | |
117 | QAbstractButton *button = new ButtonWidget(this); |
118 | auto setButtonGeometry = [this, button](){ |
119 | QSize buttonSize = button->sizeHint(); |
120 | button->setGeometry(ax: width() - buttonSize.width() - 20, |
121 | ay: height() - buttonSize.height() - 20, |
122 | aw: buttonSize.width(), ah: buttonSize.height()); |
123 | }; |
124 | connect(sender: button, signal: &QAbstractButton::toggled, context: this, slot: setButtonGeometry); |
125 | setButtonGeometry(); |
126 | |
127 | connect(sender: button, signal: &QAbstractButton::toggled, |
128 | receiver: this, slot: &TrafficLight::toggleWorking); |
129 | } |
130 | |
131 | void TrafficLight::toggleWorking(bool pause) |
132 | { |
133 | m_machine->submitEvent(eventName: pause ? "smash" : "repair" ); |
134 | } |
135 | |
136 | LightWidget::LightWidget(const QString &image, QWidget *parent) |
137 | : QWidget(parent) |
138 | , m_image(image) |
139 | {} |
140 | |
141 | bool LightWidget::isOn() const |
142 | { return m_on; } |
143 | |
144 | void LightWidget::setOn(bool on) |
145 | { |
146 | if (on == m_on) |
147 | return; |
148 | m_on = on; |
149 | update(); |
150 | } |
151 | |
152 | void LightWidget::switchLight(bool onoff) |
153 | { setOn(onoff); } |
154 | |
155 | void LightWidget::paintEvent(QPaintEvent *) |
156 | { |
157 | if (!m_on) |
158 | return; |
159 | QPainter painter(this); |
160 | painter.setRenderHint(hint: QPainter::Antialiasing); |
161 | painter.drawImage(x: 0, y: 0, image: m_image); |
162 | } |
163 | |
164 | QSize LightWidget::sizeHint() const |
165 | { |
166 | return m_image.size(); |
167 | } |
168 | |
169 | ButtonWidget::ButtonWidget(QWidget *parent) : |
170 | QAbstractButton(parent), m_playIcon(QLatin1String(":/play.png" )), |
171 | m_pauseIcon(QLatin1String(":/pause.png" )) |
172 | { |
173 | setCheckable(true); |
174 | } |
175 | |
176 | void ButtonWidget::paintEvent(QPaintEvent *) |
177 | { |
178 | QPainter painter(this); |
179 | painter.setRenderHint(hint: QPainter::Antialiasing); |
180 | painter.drawImage(x: 0, y: 0, image: isChecked() ? m_playIcon : m_pauseIcon); |
181 | } |
182 | |
183 | QSize ButtonWidget::sizeHint() const |
184 | { |
185 | return isChecked() ? m_playIcon.size() : m_pauseIcon.size(); |
186 | } |
187 | |