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
|
#include "qrcodedialog.h"
#include "ui_qrcodedialog.h"
#include "bitcoinunits.h"
#include "guiconstants.h"
#include "guiutil.h"
#include "optionsmodel.h"
#include <QPixmap>
#if QT_VERSION < 0x050000
#include <QUrl>
#endif
#include <qrencode.h>
QRCodeDialog::QRCodeDialog(const QString &addr, const QString &label, bool enableReq, QWidget *parent) :
QDialog(parent),
ui(new Ui::QRCodeDialog),
model(0),
address(addr)
{
ui->setupUi(this);
setWindowTitle(QString("%1").arg(address));
ui->chkReqPayment->setVisible(enableReq);
ui->lblAmount->setVisible(enableReq);
ui->lnReqAmount->setVisible(enableReq);
ui->lnLabel->setText(label);
ui->btnSaveAs->setEnabled(false);
genCode();
}
QRCodeDialog::~QRCodeDialog()
{
delete ui;
}
void QRCodeDialog::setModel(OptionsModel *model)
{
this->model = model;
if (model)
connect(model, SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));
// update the display unit, to not use the default ("BTC")
updateDisplayUnit();
}
void QRCodeDialog::genCode()
{
QString uri = getURI();
if (uri != "")
{
ui->lblQRCode->setText("");
QRcode *code = QRcode_encodeString(uri.toUtf8().constData(), 0, QR_ECLEVEL_L, QR_MODE_8, 1);
if (!code)
{
ui->lblQRCode->setText(tr("Error encoding URI into QR Code."));
return;
}
myImage = QImage(code->width + 8, code->width + 8, QImage::Format_RGB32);
myImage.fill(0xffffff);
unsigned char *p = code->data;
for (int y = 0; y < code->width; y++)
{
for (int x = 0; x < code->width; x++)
{
myImage.setPixel(x + 4, y + 4, ((*p & 1) ? 0x0 : 0xffffff));
p++;
}
}
QRcode_free(code);
ui->lblQRCode->setPixmap(QPixmap::fromImage(myImage).scaled(300, 300));
ui->outUri->setPlainText(uri);
}
}
QString QRCodeDialog::getURI()
{
QString ret = QString("bitcoin:%1").arg(address);
int paramCount = 0;
ui->outUri->clear();
if (ui->chkReqPayment->isChecked())
{
if (ui->lnReqAmount->validate())
{
// even if we allow a non BTC unit input in lnReqAmount, we generate the URI with BTC as unit (as defined in BIP21)
ret += QString("?amount=%1").arg(BitcoinUnits::format(BitcoinUnits::BTC, ui->lnReqAmount->value()));
paramCount++;
}
else
{
ui->btnSaveAs->setEnabled(false);
ui->lblQRCode->setText(tr("The entered amount is invalid, please check."));
return QString("");
}
}
if (!ui->lnLabel->text().isEmpty())
{
QString lbl(QUrl::toPercentEncoding(ui->lnLabel->text()));
ret += QString("%1label=%2").arg(paramCount == 0 ? "?" : "&").arg(lbl);
paramCount++;
}
if (!ui->lnMessage->text().isEmpty())
{
QString msg(QUrl::toPercentEncoding(ui->lnMessage->text()));
ret += QString("%1message=%2").arg(paramCount == 0 ? "?" : "&").arg(msg);
paramCount++;
}
// limit URI length to prevent a DoS against the QR-Code dialog
if (ret.length() > MAX_URI_LENGTH)
{
ui->btnSaveAs->setEnabled(false);
ui->lblQRCode->setText(tr("Resulting URI too long, try to reduce the text for label / message."));
return QString("");
}
ui->btnSaveAs->setEnabled(true);
return ret;
}
void QRCodeDialog::on_lnReqAmount_textChanged()
{
genCode();
}
void QRCodeDialog::on_lnLabel_textChanged()
{
genCode();
}
void QRCodeDialog::on_lnMessage_textChanged()
{
genCode();
}
void QRCodeDialog::on_btnSaveAs_clicked()
{
QString fn = GUIUtil::getSaveFileName(this, tr("Save QR Code"), QString(), tr("PNG Images (*.png)"));
if (!fn.isEmpty())
myImage.scaled(EXPORT_IMAGE_SIZE, EXPORT_IMAGE_SIZE).save(fn);
}
void QRCodeDialog::on_chkReqPayment_toggled(bool fChecked)
{
if (!fChecked)
// if chkReqPayment is not active, don't display lnReqAmount as invalid
ui->lnReqAmount->setValid(true);
genCode();
}
void QRCodeDialog::updateDisplayUnit()
{
if (model)
{
// Update lnReqAmount with the current unit
ui->lnReqAmount->setDisplayUnit(model->getDisplayUnit());
}
}
|
