1 #include "qrcodedialog.h"
2 #include "ui_qrcodedialog.h"
4 #include "bitcoinunits.h"
5 #include "guiconstants.h"
7 #include "optionsmodel.h"
14 QRCodeDialog::QRCodeDialog(const QString &addr, const QString &label, bool enableReq, QWidget *parent) :
16 ui(new Ui::QRCodeDialog),
22 setWindowTitle(QString("%1").arg(address));
24 ui->chkReqPayment->setVisible(enableReq);
25 ui->lblAmount->setVisible(enableReq);
26 ui->lnReqAmount->setVisible(enableReq);
28 ui->lnLabel->setText(label);
30 ui->btnSaveAs->setEnabled(false);
35 QRCodeDialog::~QRCodeDialog()
40 void QRCodeDialog::setModel(OptionsModel *model)
45 connect(model, SIGNAL(displayUnitChanged(int)), this, SLOT(updateDisplayUnit()));
47 // update the display unit, to not use the default ("BTC")
51 void QRCodeDialog::genCode()
53 QString uri = getURI();
57 ui->lblQRCode->setText("");
59 QRcode *code = QRcode_encodeString(uri.toUtf8().constData(), 0, QR_ECLEVEL_L, QR_MODE_8, 1);
62 ui->lblQRCode->setText(tr("Error encoding URI into QR Code."));
65 myImage = QImage(code->width + 8, code->width + 8, QImage::Format_RGB32);
66 myImage.fill(0xffffff);
67 unsigned char *p = code->data;
68 for (int y = 0; y < code->width; y++)
70 for (int x = 0; x < code->width; x++)
72 myImage.setPixel(x + 4, y + 4, ((*p & 1) ? 0x0 : 0xffffff));
78 ui->lblQRCode->setPixmap(QPixmap::fromImage(myImage).scaled(300, 300));
80 ui->outUri->setPlainText(uri);
84 QString QRCodeDialog::getURI()
86 QString ret = QString("bitcoin:%1").arg(address);
91 if (ui->chkReqPayment->isChecked())
93 if (ui->lnReqAmount->validate())
95 // even if we allow a non BTC unit input in lnReqAmount, we generate the URI with BTC as unit (as defined in BIP21)
96 ret += QString("?amount=%1").arg(BitcoinUnits::format(BitcoinUnits::BTC, ui->lnReqAmount->value()));
101 ui->btnSaveAs->setEnabled(false);
102 ui->lblQRCode->setText(tr("The entered amount is invalid, please check."));
107 if (!ui->lnLabel->text().isEmpty())
109 QString lbl(QUrl::toPercentEncoding(ui->lnLabel->text()));
110 ret += QString("%1label=%2").arg(paramCount == 0 ? "?" : "&").arg(lbl);
114 if (!ui->lnMessage->text().isEmpty())
116 QString msg(QUrl::toPercentEncoding(ui->lnMessage->text()));
117 ret += QString("%1message=%2").arg(paramCount == 0 ? "?" : "&").arg(msg);
121 // limit URI length to prevent a DoS against the QR-Code dialog
122 if (ret.length() > MAX_URI_LENGTH)
124 ui->btnSaveAs->setEnabled(false);
125 ui->lblQRCode->setText(tr("Resulting URI too long, try to reduce the text for label / message."));
129 ui->btnSaveAs->setEnabled(true);
133 void QRCodeDialog::on_lnReqAmount_textChanged()
138 void QRCodeDialog::on_lnLabel_textChanged()
143 void QRCodeDialog::on_lnMessage_textChanged()
148 void QRCodeDialog::on_btnSaveAs_clicked()
150 QString fn = GUIUtil::getSaveFileName(this, tr("Save QR Code"), QString(), tr("PNG Images (*.png)"));
152 myImage.scaled(EXPORT_IMAGE_SIZE, EXPORT_IMAGE_SIZE).save(fn);
155 void QRCodeDialog::on_chkReqPayment_toggled(bool fChecked)
158 // if chkReqPayment is not active, don't display lnReqAmount as invalid
159 ui->lnReqAmount->setValid(true);
164 void QRCodeDialog::updateDisplayUnit()
168 // Update lnReqAmount with the current unit
169 ui->lnReqAmount->setDisplayUnit(model->getDisplayUnit());