1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
// Copyright (C) 2017 Andre Hartmann <aha_1980@gmx.de>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "sendframebox.h"
#include "ui_sendframebox.h"
using namespace Qt::StringLiterals;
static const QRegularExpression &threeHexDigitsPattern()
{
static const QRegularExpression result(u"[[:xdigit:]]{3}"_s);
Q_ASSERT(result.isValid());
return result;
}
static const QRegularExpression &oneDigitAndSpacePattern()
{
static const QRegularExpression result(u"((\\s+)|^)([[:xdigit:]]{1})(\\s+)"_s);
Q_ASSERT(result.isValid());
return result;
}
const QRegularExpression &hexNumberPattern()
{
static const QRegularExpression result(u"^[[:xdigit:]]*$"_s);
Q_ASSERT(result.isValid());
return result;
}
const QRegularExpression &twoSpacesPattern()
{
static const QRegularExpression result(u"([\\s]{2})"_s);
Q_ASSERT(result.isValid());
return result;
}
enum {
MaxStandardId = 0x7FF,
MaxExtendedId = 0x10000000
};
enum {
MaxPayload = 8,
MaxPayloadFd = 64
};
static bool isEvenHex(QString input)
{
input.remove(u' ');
return (input.size() % 2) == 0;
}
// Formats a string of hex characters with a space between every byte
// Example: "012345" -> "01 23 45"
static QString formatHexData(const QString &input)
{
QString out = input;
while (true) {
if (auto match = threeHexDigitsPattern().match(out); match.hasMatch()) {
out.insert(match.capturedEnd() - 1, u' ');
} else if (match = oneDigitAndSpacePattern().match(out); match.hasMatch()) {
const auto pos = match.capturedEnd() - 1;
if (out.at(pos) == u' ')
out.remove(pos, 1);
} else {
break;
}
}
return out.simplified().toUpper();
}
HexIntegerValidator::HexIntegerValidator(QObject *parent) :
QValidator(parent),
m_maximum(MaxStandardId)
{
}
QValidator::State HexIntegerValidator::validate(QString &input, int &) const
{
if (input.isEmpty())
return Intermediate;
bool ok;
uint value = input.toUInt(&ok, 16);
return ok && value <= m_maximum ? Acceptable : Invalid;
}
void HexIntegerValidator::setMaximum(uint maximum)
{
m_maximum = maximum;
}
HexStringValidator::HexStringValidator(QObject *parent) :
QValidator(parent),
m_maxLength(MaxPayload)
{
}
QValidator::State HexStringValidator::validate(QString &input, int &pos) const
{
const int maxSize = 2 * m_maxLength;
QString data = input;
data.remove(u' ');
if (data.isEmpty())
return Intermediate;
// limit maximum size
if (data.size() > maxSize)
return Invalid;
// check if all input is valid
if (!hexNumberPattern().match(data).hasMatch())
return Invalid;
// don't allow user to enter more than one space
if (const auto match = twoSpacesPattern().match(input); match.hasMatch()) {
input.replace(match.capturedStart(), 2, ' ');
pos = match.capturedEnd() - 1;
}
// insert a space after every two hex nibbles
while (true) {
const QRegularExpressionMatch match = threeHexDigitsPattern().match(input);
if (!match.hasMatch())
break;
const auto start = match.capturedStart();
const auto end = match.capturedEnd();
if (pos == start + 1) {
// add one hex nibble before two - Abc
input.insert(pos, u' ');
} else if (pos == start + 2) {
// add hex nibble in the middle - aBc
input.insert(end - 1, u' ');
pos = end;
} else {
// add one hex nibble after two - abC
input.insert(end - 1, u' ');
pos = end + 1;
}
}
return Acceptable;
}
void HexStringValidator::setMaxLength(int maxLength)
{
m_maxLength = maxLength;
}
SendFrameBox::SendFrameBox(QWidget *parent) :
QGroupBox(parent),
m_ui(new Ui::SendFrameBox)
{
m_ui->setupUi(this);
m_hexIntegerValidator = new HexIntegerValidator(this);
m_ui->frameIdEdit->setValidator(m_hexIntegerValidator);
m_hexStringValidator = new HexStringValidator(this);
m_ui->payloadEdit->setValidator(m_hexStringValidator);
connect(m_ui->dataFrame, &QRadioButton::toggled, this, [this](bool set) {
if (set)
m_ui->flexibleDataRateBox->setEnabled(true);
});
connect(m_ui->remoteFrame, &QRadioButton::toggled, this, [this](bool set) {
if (set) {
m_ui->flexibleDataRateBox->setEnabled(false);
m_ui->flexibleDataRateBox->setChecked(false);
}
});
connect(m_ui->errorFrame, &QRadioButton::toggled, this, [this](bool set) {
if (set) {
m_ui->flexibleDataRateBox->setEnabled(false);
m_ui->flexibleDataRateBox->setChecked(false);
}
});
connect(m_ui->extendedFormatBox, &QCheckBox::toggled, this, [this](bool set) {
m_hexIntegerValidator->setMaximum(set ? MaxExtendedId : MaxStandardId);
});
connect(m_ui->flexibleDataRateBox, &QCheckBox::toggled, this, [this](bool set) {
m_hexStringValidator->setMaxLength(set ? MaxPayloadFd : MaxPayload);
m_ui->bitrateSwitchBox->setEnabled(set);
if (!set)
m_ui->bitrateSwitchBox->setChecked(false);
});
auto frameIdOrPayloadChanged = [this]() {
const bool hasFrameId = !m_ui->frameIdEdit->text().isEmpty();
m_ui->sendButton->setEnabled(hasFrameId);
m_ui->sendButton->setToolTip(hasFrameId
? QString() : tr("Cannot send because no Frame ID was given."));
if (hasFrameId) {
const bool isEven = isEvenHex(m_ui->payloadEdit->text());
m_ui->sendButton->setEnabled(isEven);
m_ui->sendButton->setToolTip(isEven
? QString() : tr("Cannot send because Payload hex string is invalid."));
}
};
connect(m_ui->frameIdEdit, &QLineEdit::textChanged, this, frameIdOrPayloadChanged);
connect(m_ui->payloadEdit, &QLineEdit::textChanged, this, frameIdOrPayloadChanged);
frameIdOrPayloadChanged();
connect(m_ui->sendButton, &QPushButton::clicked, this, [this]() {
//! [prepare_can_frame]
const uint frameId = m_ui->frameIdEdit->text().toUInt(nullptr, 16);
QString data = m_ui->payloadEdit->text();
m_ui->payloadEdit->setText(formatHexData(data));
const QByteArray payload = QByteArray::fromHex(data.remove(u' ').toLatin1());
QCanBusFrame frame = QCanBusFrame(frameId, payload);
frame.setExtendedFrameFormat(m_ui->extendedFormatBox->isChecked());
frame.setFlexibleDataRateFormat(m_ui->flexibleDataRateBox->isChecked());
frame.setBitrateSwitch(m_ui->bitrateSwitchBox->isChecked());
if (m_ui->errorFrame->isChecked())
frame.setFrameType(QCanBusFrame::ErrorFrame);
else if (m_ui->remoteFrame->isChecked())
frame.setFrameType(QCanBusFrame::RemoteRequestFrame);
//! [prepare_can_frame]
emit sendFrame(frame);
});
}
SendFrameBox::~SendFrameBox()
{
delete m_ui;
}
|
