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 "receiverequestdialog.h"
   6 #include "ui_receiverequestdialog.h"
   7
   8 #include "bitcoinunits.h"
   9 #include "guiconstants.h"
  10 #include "guiutil.h"
  11 #include "optionsmodel.h"
  12 #include "walletmodel.h"
  13
  14 #include <QClipboard>
  15 #include <QDrag>
  16 #include <QMenu>
  17 #include <QMimeData>
  18 #include <QMouseEvent>
  19 #include <QPixmap>
  20 #if QT_VERSION < 0x050000
  21 #include <QUrl>
  22 #endif
  23
  24 #if defined(HAVE_CONFIG_H)
  25 #include "config/bitcoin-config.h" /* for USE_QRCODE */
  26 #endif
  27
  28 #ifdef USE_QRCODE
  29 #include <qrencode.h>
  30 #endif
  31
  32 QRImageWidget::QRImageWidget(QWidget *parent):
  33     QLabel(parent), contextMenu(0)
  34 {
  35     contextMenu = new QMenu(this);
  36     QAction *saveImageAction = new QAction(tr("&Save Image..."), this);
  37     connect(saveImageAction, SIGNAL(triggered()), this, SLOT(saveImage()));
  38     contextMenu->addAction(saveImageAction);
  39     QAction *copyImageAction = new QAction(tr("&Copy Image"), this);
  40     connect(copyImageAction, SIGNAL(triggered()), this, SLOT(copyImage()));
  41     contextMenu->addAction(copyImageAction);
  42 }
  43
  44 QImage QRImageWidget::exportImage()
  45 {
  46     if(!pixmap())
  47         return QImage();
  48     return pixmap()->toImage();
  49 }
  50
  51 void QRImageWidget::mousePressEvent(QMouseEvent *event)
  52 {
  53     if(event->button() == Qt::LeftButton && pixmap())
  54     {
  55         event->accept();
  56         QMimeData *mimeData = new QMimeData;
  57         mimeData->setImageData(exportImage());
  58
  59         QDrag *drag = new QDrag(this);
  60         drag->setMimeData(mimeData);
  61         drag->exec();
  62     } else {
  63         QLabel::mousePressEvent(event);
  64     }
  65 }
  66
  67 void QRImageWidget::saveImage()
  68 {
  69     if(!pixmap())
  70         return;
  71     QString fn = GUIUtil::getSaveFileName(this, tr("Save QR Code"), QString(), tr("PNG Image (*.png)"), NULL);
  72     if (!fn.isEmpty())
  73     {
  74         exportImage().save(fn);
  75     }
  76 }
  77
  78 void QRImageWidget::copyImage()
  79 {
  80     if(!pixmap())
  81         return;
  82     QApplication::clipboard()->setImage(exportImage());
  83 }
  84
  85 void QRImageWidget::contextMenuEvent(QContextMenuEvent *event)
  86 {
  87     if(!pixmap())
  88         return;
  89     contextMenu->exec(event->globalPos());
  90 }
  91
  92 ReceiveRequestDialog::ReceiveRequestDialog(QWidget *parent) :
  93     QDialog(parent),
  94     ui(new Ui::ReceiveRequestDialog),
  95     model(0)
  96 {
  97     ui->setupUi(this);
  98
  99 #ifndef USE_QRCODE
 100     ui->btnSaveAs->setVisible(false);
 101     ui->lblQRCode->setVisible(false);
 102 #endif
 103
 104     connect(ui->btnSaveAs, SIGNAL(clicked()), ui->lblQRCode, SLOT(saveImage()));
 105 }
 106
 107 ReceiveRequestDialog::~ReceiveRequestDialog()
 108 {
 109     delete ui;
 110 }
 111
 112 void ReceiveRequestDialog::setModel(OptionsModel *_model)
 113 {
 114     this->model = _model;
 115
 116     if (_model)
 117         connect(_model, SIGNAL(displayUnitChanged(int)), this, SLOT(update()));
 118
 119     // update the display unit if necessary
 120     update();
 121 }
 122
 123 void ReceiveRequestDialog::setInfo(const SendCoinsRecipient &_info)
 124 {
 125     this->info = _info;
 126     update();
 127 }
 128
 129 void ReceiveRequestDialog::update()
 130 {
 131     if(!model)
 132         return;
 133     QString target = info.label;
 134     if(target.isEmpty())
 135         target = info.address;
 136     setWindowTitle(tr("Request payment to %1").arg(target));
 137
 138     QString uri = GUIUtil::formatBitcoinURI(info);
 139     ui->btnSaveAs->setEnabled(false);
 140     QString html;
 141     html += "<html><font face='verdana, arial, helvetica, sans-serif'>";
 142     html += "<b>"+tr("Payment information")+"</b><br>";
 143     html += "<b>"+tr("URI")+"</b>: ";
 144     html += "<a href=\""+uri+"\">" + GUIUtil::HtmlEscape(uri) + "</a><br>";
 145     html += "<b>"+tr("Address")+"</b>: " + GUIUtil::HtmlEscape(info.address) + "<br>";
 146     if(info.amount)
 147         html += "<b>"+tr("Amount")+"</b>: " + BitcoinUnits::formatHtmlWithUnit(model->getDisplayUnit(), info.amount) + "<br>";
 148     if(!info.label.isEmpty())
 149         html += "<b>"+tr("Label")+"</b>: " + GUIUtil::HtmlEscape(info.label) + "<br>";
 150     if(!info.message.isEmpty())
 151         html += "<b>"+tr("Message")+"</b>: " + GUIUtil::HtmlEscape(info.message) + "<br>";
 152     ui->outUri->setText(html);
 153
 154 #ifdef USE_QRCODE
 155     ui->lblQRCode->setText("");
 156     if(!uri.isEmpty())
 157     {
 158         // limit URI length
 159         if (uri.length() > MAX_URI_LENGTH)
 160         {
 161             ui->lblQRCode->setText(tr("Resulting URI too long, try to reduce the text for label / message."));
 162         } else {
 163             QRcode *code = QRcode_encodeString(uri.toUtf8().constData(), 0, QR_ECLEVEL_L, QR_MODE_8, 1);
 164             if (!code)
 165             {
 166                 ui->lblQRCode->setText(tr("Error encoding URI into QR Code."));
 167                 return;
 168             }
 169             QImage qrImage = QImage(code->width + 8, code->width + 8, QImage::Format_RGB32);
 170             qrImage.fill(0xffffff);
 171             unsigned char *p = code->data;
 172             for (int y = 0; y < code->width; y++)
 173             {
 174                 for (int x = 0; x < code->width; x++)
 175                 {
 176                     qrImage.setPixel(x + 4, y + 4, ((*p & 1) ? 0x0 : 0xffffff));
 177                     p++;
 178                 }
 179             }
 180             QRcode_free(code);
 181
 182             QImage qrAddrImage = QImage(QR_IMAGE_SIZE, QR_IMAGE_SIZE+20, QImage::Format_RGB32);
 183             qrAddrImage.fill(0xffffff);
 184             QPainter painter(&qrAddrImage);
 185             painter.drawImage(0, 0, qrImage.scaled(QR_IMAGE_SIZE, QR_IMAGE_SIZE));
 186             QFont font = GUIUtil::fixedPitchFont();
 187             font.setPixelSize(12);
 188             painter.setFont(font);
 189             QRect paddedRect = qrAddrImage.rect();
 190             paddedRect.setHeight(QR_IMAGE_SIZE+12);
 191             painter.drawText(paddedRect, Qt::AlignBottom|Qt::AlignCenter, info.address);
 192             painter.end();
 193
 194             ui->lblQRCode->setPixmap(QPixmap::fromImage(qrAddrImage));
 195             ui->btnSaveAs->setEnabled(true);
 196         }
 197     }
 198 #endif
 199 }
 200
 201 void ReceiveRequestDialog::on_btnCopyURI_clicked()
 202 {
 203     GUIUtil::setClipboard(GUIUtil::formatBitcoinURI(info));
 204 }
 205
 206 void ReceiveRequestDialog::on_btnCopyAddress_clicked()
 207 {
 208     GUIUtil::setClipboard(info.address);
 209 }