1 #include "qrcodedialog.h"
2 #include "ui_qrcodedialog.h"
4 #include "bitcoinunits.h"
5 #include "dialogwindowflags.h"
6 #include "guiconstants.h"
8 #include "optionsmodel.h"
15 QRCodeDialog::QRCodeDialog(const QString &addr, const QString &label, bool enableReq, QWidget *parent) :
16 QDialog(parent, DIALOGWINDOWHINTS),
17 ui(new Ui::QRCodeDialog),
23 setWindowTitle(QString("%1").arg(address));
25 ui->chkReqPayment->setVisible(enableReq);
26 ui->lblAmount->setVisible(enableReq);
27 ui->lnReqAmount->setVisible(enableReq);
29 ui->lnLabel->setText(label);
31 ui->btnSaveAs->setEnabled(false);
36 QRCodeDialog::~QRCodeDialog()
41 void QRCodeDialog::setModel(OptionsModel *model)
46 connect(model, SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));
48 // update the display unit, to not use the default ("BTC")
52 void QRCodeDialog::genCode()
54 QString uri = getURI();
58 ui->lblQRCode->setText("");
60 QRcode *code = QRcode_encodeString(uri.toUtf8().constData(), 0, QR_ECLEVEL_L, QR_MODE_8, 1);
63 ui->lblQRCode->setText(tr("Error encoding URI into QR Code."));
66 myImage = QImage(code->width + 8, code->width + 8, QImage::Format_RGB32);
67 myImage.fill(0xffffff);
68 unsigned char *p = code->data;
69 for (int y = 0; y < code->width; y++)
71 for (int x = 0; x < code->width; x++)
73 myImage.setPixel(x + 4, y + 4, ((*p & 1) ? 0x0 : 0xffffff));
79 ui->lblQRCode->setPixmap(QPixmap::fromImage(myImage).scaled(300, 300));
81 ui->outUri->setPlainText(uri);
85 QString QRCodeDialog::getURI()
87 QString ret = QString("novacoin:%1").arg(address);
92 if (ui->chkReqPayment->isChecked())
94 if (ui->lnReqAmount->validate())
96 // even if we allow a non BTC unit input in lnReqAmount, we generate the URI with BTC as unit (as defined in BIP21)
97 ret += QString("?amount=%1").arg(BitcoinUnits::format(BitcoinUnits::BTC, ui->lnReqAmount->value()));
102 ui->btnSaveAs->setEnabled(false);
103 ui->lblQRCode->setText(tr("The entered amount is invalid, please check."));
108 if (!ui->lnLabel->text().isEmpty())
110 QString lbl(QUrl::toPercentEncoding(ui->lnLabel->text()));
111 ret += QString("%1label=%2").arg(paramCount == 0 ? "?" : "&").arg(lbl);
115 if (!ui->lnMessage->text().isEmpty())
117 QString msg(QUrl::toPercentEncoding(ui->lnMessage->text()));
118 ret += QString("%1message=%2").arg(paramCount == 0 ? "?" : "&").arg(msg);
122 // limit URI length to prevent a DoS against the QR-Code dialog
123 if (ret.length() > MAX_URI_LENGTH)
125 ui->btnSaveAs->setEnabled(false);
126 ui->lblQRCode->setText(tr("Resulting URI too long, try to reduce the text for label / message."));
130 ui->btnSaveAs->setEnabled(true);
134 void QRCodeDialog::on_lnReqAmount_textChanged()
139 void QRCodeDialog::on_lnLabel_textChanged()
144 void QRCodeDialog::on_lnMessage_textChanged()
149 void QRCodeDialog::on_btnSaveAs_clicked()
151 QString fn = GUIUtil::getSaveFileName(this, tr("Save QR Code"), QString(), tr("PNG Images (*.png)"));
153 myImage.scaled(EXPORT_IMAGE_SIZE, EXPORT_IMAGE_SIZE).save(fn);
156 void QRCodeDialog::on_chkReqPayment_toggled(bool fChecked)
159 // if chkReqPayment is not active, don't display lnReqAmount as invalid
160 ui->lnReqAmount->setValid(true);
165 void QRCodeDialog::updateDisplayUnit()
169 // Update lnReqAmount with the current unit
170 ui->lnReqAmount->setDisplayUnit(model->getDisplayUnit());