From 82095923bb71a670aa67ad15987bb6d4d7726abe Mon Sep 17 00:00:00 2001
From: "Wladimir J. van der Laan" <laanwj@gmail.com>
Date: Fri, 18 Oct 2013 13:08:30 +0200
Subject: qt: allow dragging, copying and saving QR code

Add context menu and drag handling to QR code widget.
---
 src/qt/receiverequestdialog.cpp | 59 ++++++++++++++++++++++++++++++++++-------
 1 file changed, 49 insertions(+), 10 deletions(-)

(limited to 'src/qt/receiverequestdialog.cpp')

diff --git a/src/qt/receiverequestdialog.cpp b/src/qt/receiverequestdialog.cpp
index b40cda9b32..dd4f5f16f4 100644
--- a/src/qt/receiverequestdialog.cpp
+++ b/src/qt/receiverequestdialog.cpp
@@ -7,6 +7,7 @@
 #include "optionsmodel.h"
 
 #include <QPixmap>
+#include <QClipboard>
 #if QT_VERSION < 0x050000
 #include <QUrl>
 #endif
@@ -17,6 +18,51 @@
 #include <qrencode.h>
 #endif
 
+QRImageWidget::QRImageWidget(QWidget *parent):
+    QLabel(parent)
+{
+    setContextMenuPolicy(Qt::ActionsContextMenu);
+
+    QAction *saveImageAction = new QAction(tr("&Save Image..."), this);
+    connect(saveImageAction, SIGNAL(triggered()), this, SLOT(saveImage()));
+    addAction(saveImageAction);
+    QAction *copyImageAction = new QAction(tr("&Copy Image"), this);
+    connect(copyImageAction, SIGNAL(triggered()), this, SLOT(copyImage()));
+    addAction(copyImageAction);
+}
+
+QImage QRImageWidget::exportImage()
+{
+    return pixmap()->toImage().scaled(EXPORT_IMAGE_SIZE, EXPORT_IMAGE_SIZE);
+}
+
+void QRImageWidget::mousePressEvent(QMouseEvent *event)
+{
+    if(event->button() == Qt::LeftButton)
+    {
+        QMimeData *mimeData = new QMimeData;
+        mimeData->setImageData(exportImage());
+
+        QDrag *drag = new QDrag(this);
+        drag->setMimeData(mimeData);
+        drag->exec();
+    }
+}
+
+void QRImageWidget::saveImage()
+{
+    QString fn = GUIUtil::getSaveFileName(this, tr("Save QR Code"), QString(), tr("PNG Images (*.png)"));
+    if (!fn.isEmpty())
+    {
+        exportImage().save(fn);
+    }
+}
+
+void QRImageWidget::copyImage()
+{
+    QApplication::clipboard()->setImage(exportImage());
+}
+
 ReceiveRequestDialog::ReceiveRequestDialog(const QString &addr, const QString &label, quint64 amount, const QString &message, QWidget *parent) :
     QDialog(parent),
     ui(new Ui::ReceiveRequestDialog),
@@ -42,6 +88,8 @@ ReceiveRequestDialog::ReceiveRequestDialog(const QString &addr, const QString &l
     ui->lblQRCode->setVisible(false);
 #endif
 
+    connect(ui->btnSaveAs, SIGNAL(clicked()), ui->lblQRCode, SLOT(saveImage()));
+
     genCode();
 }
 
@@ -77,7 +125,7 @@ void ReceiveRequestDialog::genCode()
             ui->lblQRCode->setText(tr("Error encoding URI into QR Code."));
             return;
         }
-        myImage = QImage(code->width + 8, code->width + 8, QImage::Format_RGB32);
+        QImage 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++)
@@ -147,15 +195,6 @@ 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)
-- 
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