src/qt/receiverequestdialog.cpp

   1 // Copyright (c) 2011-2016 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #include <qt/receiverequestdialog.h>
   6 #include <qt/forms/ui_receiverequestdialog.h>
   7
   8 #include <qt/bitcoinunits.h>
   9 #include <qt/guiconstants.h>
  10 #include <qt/guiutil.h>
  11 #include <qt/optionsmodel.h>
  12
  13 #include <QClipboard>
  14 #include <QDrag>
  15 #include <QMenu>
  16 #include <QMimeData>
  17 #include <QMouseEvent>
  18 #include <QPixmap>
  19 #if QT_VERSION < 0x050000
  20 #include <QUrl>
  21 #endif
  22
  23 #if defined(HAVE_CONFIG_H)
  24 #include <config/bitcoin-config.h> /* for USE_QRCODE */
  25 #endif
  26
  27 #ifdef USE_QRCODE
  28 #include <qrencode.h>
  29 #endif
  30
  31 QRImageWidget::QRImageWidget(QWidget *parent):
  32     QLabel(parent), contextMenu(0)
  33 {
  34     contextMenu = new QMenu(this);
  35     QAction *saveImageAction = new QAction(tr("&Save Image..."), this);
  36     connect(saveImageAction, SIGNAL(triggered()), this, SLOT(saveImage()));
  37     contextMenu->addAction(saveImageAction);
  38     QAction *copyImageAction = new QAction(tr("&Copy Image"), this);
  39     connect(copyImageAction, SIGNAL(triggered()), this, SLOT(copyImage()));
  40     contextMenu->addAction(copyImageAction);
  41 }
  42
  43 QImage QRImageWidget::exportImage()
  44 {
  45     if(!pixmap())
  46         return QImage();
  47     return pixmap()->toImage();
  48 }
  49
  50 void QRImageWidget::mousePressEvent(QMouseEvent *event)
  51 {
  52     if(event->button() == Qt::LeftButton && pixmap())
  53     {
  54         event->accept();
  55         QMimeData *mimeData = new QMimeData;
  56         mimeData->setImageData(exportImage());
  57
  58         QDrag *drag = new QDrag(this);
  59         drag->setMimeData(mimeData);
  60         drag->exec();
  61     } else {
  62         QLabel::mousePressEvent(event);
  63     }
  64 }
  65
  66 void QRImageWidget::saveImage()
  67 {
  68     if(!pixmap())
  69         return;
  70     QString fn = GUIUtil::getSaveFileName(this, tr("Save QR Code"), QString(), tr("PNG Image (*.png)"), nullptr);
  71     if (!fn.isEmpty())
  72     {
  73         exportImage().save(fn);
  74     }
  75 }
  76
  77 void QRImageWidget::copyImage()
  78 {
  79     if(!pixmap())
  80         return;
  81     QApplication::clipboard()->setImage(exportImage());
  82 }
  83
  84 void QRImageWidget::contextMenuEvent(QContextMenuEvent *event)
  85 {
  86     if(!pixmap())
  87         return;
  88     contextMenu->exec(event->globalPos());
  89 }
  90
  91 ReceiveRequestDialog::ReceiveRequestDialog(QWidget *parent) :
  92     QDialog(parent),
  93     ui(new Ui::ReceiveRequestDialog),
  94     model(0)
  95 {
  96     ui->setupUi(this);
  97
  98 #ifndef USE_QRCODE
  99     ui->btnSaveAs->setVisible(false);
 100     ui->lblQRCode->setVisible(false);
 101 #endif
 102
 103     connect(ui->btnSaveAs, SIGNAL(clicked()), ui->lblQRCode, SLOT(saveImage()));
 104 }
 105
 106 ReceiveRequestDialog::~ReceiveRequestDialog()
 107 {
 108     delete ui;
 109 }
 110
 111 void ReceiveRequestDialog::setModel(OptionsModel *_model)
 112 {
 113     this->model = _model;
 114
 115     if (_model)
 116         connect(_model, SIGNAL(displayUnitChanged(int)), this, SLOT(update()));
 117
 118     // update the display unit if necessary
 119     update();
 120 }
 121
 122 void ReceiveRequestDialog::setInfo(const SendCoinsRecipient &_info)
 123 {
 124     this->info = _info;
 125     update();
 126 }
 127
 128 void ReceiveRequestDialog::update()
 129 {
 130     if(!model)
 131         return;
 132     QString target = info.label;
 133     if(target.isEmpty())
 134         target = info.address;
 135     setWindowTitle(tr("Request payment to %1").arg(target));
 136
 137     QString uri = GUIUtil::formatBitcoinURI(info);
 138     ui->btnSaveAs->setEnabled(false);
 139     QString html;
 140     html += "<html><font face='verdana, arial, helvetica, sans-serif'>";
 141     html += "<b>"+tr("Payment information")+"</b><br>";
 142     html += "<b>"+tr("URI")+"</b>: ";
 143     html += "<a href=\""+uri+"\">" + GUIUtil::HtmlEscape(uri) + "</a><br>";
 144     html += "<b>"+tr("Address")+"</b>: " + GUIUtil::HtmlEscape(info.address) + "<br>";
 145     if(info.amount)
 146         html += "<b>"+tr("Amount")+"</b>: " + BitcoinUnits::formatHtmlWithUnit(model->getDisplayUnit(), info.amount) + "<br>";
 147     if(!info.label.isEmpty())
 148         html += "<b>"+tr("Label")+"</b>: " + GUIUtil::HtmlEscape(info.label) + "<br>";
 149     if(!info.message.isEmpty())
 150         html += "<b>"+tr("Message")+"</b>: " + GUIUtil::HtmlEscape(info.message) + "<br>";
 151     ui->outUri->setText(html);
 152
 153 #ifdef USE_QRCODE
 154     ui->lblQRCode->setText("");
 155     if(!uri.isEmpty())
 156     {
 157         // limit URI length
 158         if (uri.length() > MAX_URI_LENGTH)
 159         {
 160             ui->lblQRCode->setText(tr("Resulting URI too long, try to reduce the text for label / message."));
 161         } else {
 162             QRcode *code = QRcode_encodeString(uri.toUtf8().constData(), 0, QR_ECLEVEL_L, QR_MODE_8, 1);
 163             if (!code)
 164             {
 165                 ui->lblQRCode->setText(tr("Error encoding URI into QR Code."));
 166                 return;
 167             }
 168             QImage qrImage = QImage(code->width + 8, code->width + 8, QImage::Format_RGB32);
 169             qrImage.fill(0xffffff);
 170             unsigned char *p = code->data;
 171             for (int y = 0; y < code->width; y++)
 172             {
 173                 for (int x = 0; x < code->width; x++)
 174                 {
 175                     qrImage.setPixel(x + 4, y + 4, ((*p & 1) ? 0x0 : 0xffffff));
 176                     p++;
 177                 }
 178             }
 179             QRcode_free(code);
 180
 181             QImage qrAddrImage = QImage(QR_IMAGE_SIZE, QR_IMAGE_SIZE+20, QImage::Format_RGB32);
 182             qrAddrImage.fill(0xffffff);
 183             QPainter painter(&qrAddrImage);
 184             painter.drawImage(0, 0, qrImage.scaled(QR_IMAGE_SIZE, QR_IMAGE_SIZE));
 185             QFont font = GUIUtil::fixedPitchFont();
 186             font.setPixelSize(12);
 187             painter.setFont(font);
 188             QRect paddedRect = qrAddrImage.rect();
 189             paddedRect.setHeight(QR_IMAGE_SIZE+12);
 190             painter.drawText(paddedRect, Qt::AlignBottom|Qt::AlignCenter, info.address);
 191             painter.end();
 192
 193             ui->lblQRCode->setPixmap(QPixmap::fromImage(qrAddrImage));
 194             ui->btnSaveAs->setEnabled(true);
 195         }
 196     }
 197 #endif
 198 }
 199
 200 void ReceiveRequestDialog::on_btnCopyURI_clicked()
 201 {
 202     GUIUtil::setClipboard(GUIUtil::formatBitcoinURI(info));
 203 }
 204
 205 void ReceiveRequestDialog::on_btnCopyAddress_clicked()
 206 {
 207     GUIUtil::setClipboard(info.address);
 208 }