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#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());
}
}