qt: rework "receive coins" workflow

1 files changed, 166 insertions, 0 deletions

diff --git a/src/qt/receiverequestdialog.cpp b/src/qt/receiverequestdialog.cpp
new file mode 100644
index 0000000000..b40cda9b32
--- /dev/null
+++ b/src/qt/receiverequestdialog.cpp
@@ -0,0 +1,166 @@
+#include "receiverequestdialog.h"
+#include "ui_receiverequestdialog.h"
+
+#include "bitcoinunits.h"
+#include "guiconstants.h"
+#include "guiutil.h"
+#include "optionsmodel.h"
+
+#include <QPixmap>
+#if QT_VERSION < 0x050000
+#include <QUrl>
+#endif
+
+#include "bitcoin-config.h" /* for USE_QRCODE */
+
+#ifdef USE_QRCODE
+#include <qrencode.h>
+#endif
+
+ReceiveRequestDialog::ReceiveRequestDialog(const QString &addr, const QString &label, quint64 amount, const QString &message, QWidget *parent) :
+    QDialog(parent),
+    ui(new Ui::ReceiveRequestDialog),
+    model(0),
+    address(addr)
+{
+    ui->setupUi(this);
+
+    QString target = label;
+    if(target.isEmpty())
+        target = addr;
+    setWindowTitle(tr("Request payment to %1").arg(target));
+
+    ui->lnAddress->setText(addr);
+    if(amount)
+        ui->lnReqAmount->setValue(amount);
+    ui->lnReqAmount->setReadOnly(true);
+    ui->lnLabel->setText(label);
+    ui->lnMessage->setText(message);
+
+#ifndef USE_QRCODE
+    ui->btnSaveAs->setVisible(false);
+    ui->lblQRCode->setVisible(false);
+#endif
+
+    genCode();
+}
+
+ReceiveRequestDialog::~ReceiveRequestDialog()
+{
+    delete ui;
+}
+
+void ReceiveRequestDialog::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 ReceiveRequestDialog::genCode()
+{
+    QString uri = getURI();
+    ui->btnSaveAs->setEnabled(false);
+    ui->outUri->setPlainText(uri);
+#ifdef USE_QRCODE
+    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->btnSaveAs->setEnabled(true);
+    }
+#endif
+}
+
+QString ReceiveRequestDialog::getURI()
+{
+    QString ret = QString("bitcoin:%1").arg(address);
+    int paramCount = 0;
+
+    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++;
+    }
+
+    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
+    if (ret.length() > MAX_URI_LENGTH)
+    {
+        ui->lblQRCode->setText(tr("Resulting URI too long, try to reduce the text for label / message."));
+        return QString("");
+    }
+
+    return ret;
+}
+
+void ReceiveRequestDialog::on_lnReqAmount_textChanged()
+{
+    genCode();
+}
+
+void ReceiveRequestDialog::on_lnLabel_textChanged()
+{
+    genCode();
+}
+
+void ReceiveRequestDialog::on_lnMessage_textChanged()
+{
+    genCode();
+}
+
+void ReceiveRequestDialog::on_btnSaveAs_clicked()
+{
+#ifdef USE_QRCODE
+    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);
+#endif
+}
+
+void ReceiveRequestDialog::updateDisplayUnit()
+{
+    if (model)
+    {
+        // Update lnReqAmount with the current unit
+        ui->lnReqAmount->setDisplayUnit(model->getDisplayUnit());
+    }
+}