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GUI: Refactor actual QR code rendering into new QRImageWidget::setQR

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This commit is contained in:
Luke Dashjr 2019-02-16 23:19:49 +00:00
parent 37f236acc6
commit 77851ab682
2 changed files with 61 additions and 48 deletions
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108
src/qt/receiverequestdialog.cpp
View file

@ -37,6 +37,64 @@ QRImageWidget::QRImageWidget(QWidget *parent):
contextMenu->addAction(copyImageAction);
}
bool QRImageWidget::setQR(const QString& data, const QString& text)
{
#ifdef USE_QRCODE
setText("");
if (data.isEmpty()) return false;
// limit length
if (data.length() > MAX_URI_LENGTH) {
setText(tr("Resulting URI too long, try to reduce the text for label / message."));
return false;
}
QRcode *code = QRcode_encodeString(data.toUtf8().constData(), 0, QR_ECLEVEL_L, QR_MODE_8, 1);
if (!code) {
setText(tr("Error encoding URI into QR Code."));
return false;
}
QImage qrImage = QImage(code->width + 8, code->width + 8, QImage::Format_RGB32);
qrImage.fill(0xffffff);
unsigned char *p = code->data;
for (int y = 0; y < code->width; ++y) {
for (int x = 0; x < code->width; ++x) {
qrImage.setPixel(x + 4, y + 4, ((*p & 1) ? 0x0 : 0xffffff));
++p;
}
}
QRcode_free(code);
QImage qrAddrImage = QImage(QR_IMAGE_SIZE, QR_IMAGE_SIZE + (text.isEmpty() ? 0 : 20), QImage::Format_RGB32);
qrAddrImage.fill(0xffffff);
QPainter painter(&qrAddrImage);
painter.drawImage(0, 0, qrImage.scaled(QR_IMAGE_SIZE, QR_IMAGE_SIZE));
if (!text.isEmpty()) {
QFont font = GUIUtil::fixedPitchFont();
QRect paddedRect = qrAddrImage.rect();
// calculate ideal font size
qreal font_size = GUIUtil::calculateIdealFontSize(paddedRect.width() - 20, text, font);
font.setPointSizeF(font_size);
painter.setFont(font);
paddedRect.setHeight(QR_IMAGE_SIZE+12);
painter.drawText(paddedRect, Qt::AlignBottom|Qt::AlignCenter, text);
}
painter.end();
setPixmap(QPixmap::fromImage(qrAddrImage));
return true;
#else
setText(tr("QR code support not available."));
return false;
#endif
}
QImage QRImageWidget::exportImage()
{
if(!pixmap())
@ -150,55 +208,9 @@ void ReceiveRequestDialog::update()
}
ui->outUri->setText(html);
#ifdef USE_QRCODE
ui->lblQRCode->setText("");
if(!uri.isEmpty())
{
// limit URI length
if (uri.length() > MAX_URI_LENGTH)
{
ui->lblQRCode->setText(tr("Resulting URI too long, try to reduce the text for label / message."));
} else {
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;
}
QImage qrImage = QImage(code->width + 8, code->width + 8, QImage::Format_RGB32);
qrImage.fill(0xffffff);
unsigned char *p = code->data;
for (int y = 0; y < code->width; y++)
{
for (int x = 0; x < code->width; x++)
{
qrImage.setPixel(x + 4, y + 4, ((*p & 1) ? 0x0 : 0xffffff));
p++;
}
}
QRcode_free(code);
QImage qrAddrImage = QImage(QR_IMAGE_SIZE, QR_IMAGE_SIZE+20, QImage::Format_RGB32);
qrAddrImage.fill(0xffffff);
QPainter painter(&qrAddrImage);
painter.drawImage(0, 0, qrImage.scaled(QR_IMAGE_SIZE, QR_IMAGE_SIZE));
QFont font = GUIUtil::fixedPitchFont();
QRect paddedRect = qrAddrImage.rect();
// calculate ideal font size
qreal font_size = GUIUtil::calculateIdealFontSize(paddedRect.width() - 20, info.address, font);
font.setPointSizeF(font_size);
painter.setFont(font);
paddedRect.setHeight(QR_IMAGE_SIZE+12);
painter.drawText(paddedRect, Qt::AlignBottom|Qt::AlignCenter, info.address);
painter.end();
ui->lblQRCode->setPixmap(QPixmap::fromImage(qrAddrImage));
ui->btnSaveAs->setEnabled(true);
}
if (ui->lblQRCode->setQR(uri, info.address)) {
ui->btnSaveAs->setEnabled(true);
}
#endif
}
void ReceiveRequestDialog::on_btnCopyURI_clicked()

1
src/qt/receiverequestdialog.h
View file

@ -29,6 +29,7 @@ class QRImageWidget : public QLabel
public:
explicit QRImageWidget(QWidget *parent = nullptr);
bool setQR(const QString& data, const QString& text = "");
QImage exportImage();
public Q_SLOTS: