paperwallet added

gostcoin-qt.pro

@@ -307,9 +307,11 @@ FORMS += src/qt/forms/sendcoinsdialog.ui \
     src/qt/forms/showi2paddresses.ui
 
 contains(USE_QRCODE, 1) {
-HEADERS += src/qt/qrcodedialog.h
+HEADERS += src/qt/qrcodedialog.h src/qt/paperwallet.h
-SOURCES += src/qt/qrcodedialog.cpp
+SOURCES += src/qt/qrcodedialog.cpp src/qt/paperwallet.cpp
 FORMS += src/qt/forms/qrcodedialog.ui
+RESOURCES += src/qt/paperwallet.qrc
+QT += printsupport
 }
 
 contains(BITCOIN_QT_TEST, 1) {

src/qt/paperwallet.cpp

@@ -0,0 +1,118 @@
+#include <stdio.h>
+#include <QPainter>
+#include <QTextStream>
+#include <QTextDocument>
+#include <QUrl>
+#include <QFile>
+#include <QPrintDialog>
+#include <QPrinter>
+
+#include <qrencode.h>
+
+#include "key.h"
+#include "base58.h"
+#include "paperwallet.h"
+
+static void printAsQR(QPainter &painter, QString &vchKey, int shift)
+{
+    QRcode *qr = QRcode_encodeString(vchKey.toStdString().c_str(), 1, QR_ECLEVEL_L, QR_MODE_8, 1);
+    if (qr) 
+	{
+        QPaintDevice *pd = painter.device(); 
+        const double w = pd->width();
+        const double h = pd->height();
+        QColor bg("white");
+	    QColor fg("black");
+	    painter.setBrush(bg);
+	    painter.fillRect(0, 0, w, h, bg);
+	    painter.setPen(Qt::SolidLine);
+	    painter.setPen(fg);
+	    painter.setBrush(fg);
+        const int s=qr->width > 0 ? qr->width : 1;
+        const double aspect = w / h;
+        const double scale = ((aspect > 1.0) ? h : w) / s;// * 0.3;
+        for(int y = 0; y < s; y++)
+		{
+            const int yy = y*s;
+            for(int x = 0; x < s; x++)
+			{
+                const int xx = yy + x;
+                const unsigned char b = qr->data[xx];
+                if(b & 0x01)
+				{
+                    const double rx1 = x*scale, ry1 = y*scale;
+                    QRectF r(rx1 + shift, ry1, scale, scale);
+                    painter.drawRects(&r, 1);
+                }
+            }
+        }
+        QRcode_free(qr);
+    }
+}
+
+static bool readHtmlTemplate(const QString &res_name, QString &htmlContent)
+{
+    QFile htmlFile(res_name);
+    if (!htmlFile.open(QIODevice::ReadOnly | QIODevice::Text))
+	{
+        printf("Cant open %s\n", res_name.toStdString().c_str ());
+        return false;
+    }
+
+    QTextStream in(&htmlFile);
+    in.setCodec("UTF-8");
+    htmlContent = in.readAll();
+    return true;
+}
+
+void PrintPaperWallet (QWidget * parent)
+{
+	RandAddSeedPerfmon();
+	CKey secret;
+    secret.MakeNewKey(true);
+
+	CPrivKey privkey = secret.GetPrivKey();
+    CPubKey pubkey = secret.GetPubKey();
+    CKeyID keyid = pubkey.GetID();	
+
+	std::string secret_str = CBitcoinSecret(secret).ToString();
+    std::string address = CBitcoinAddress(keyid).ToString();
+    
+    QString qsecret = QString::fromStdString(secret_str);
+    QString qaddress = QString::fromStdString(address);
+
+	QPrinter printer(QPrinter::HighResolution);
+    printer.setPageMargins(0, 10, 0, 0, QPrinter::Millimeter);
+    
+    QPrintDialog dlg(&printer, parent);
+    if(dlg.exec() == QDialog::Accepted) 
+	{
+		QImage img1(200, 200, QImage::Format_ARGB32);
+	    QImage img2(200, 200, QImage::Format_ARGB32);
+	    QPainter painter(&img1);
+	    painter.setRenderHint(QPainter::Antialiasing, false);
+	    painter.setRenderHint(QPainter::TextAntialiasing, false);
+	    painter.setRenderHint(QPainter::SmoothPixmapTransform, false);
+	    painter.setRenderHint(QPainter::HighQualityAntialiasing, false);
+	    painter.setRenderHint(QPainter::NonCosmeticDefaultPen, false);
+	    printAsQR(painter, qaddress, 0);
+		painter.end();
+
+        painter.begin(&img2);
+        printAsQR(painter, qsecret, 0);
+        painter.end();
+
+		QString html;
+        readHtmlTemplate(":/html/paperwallet", html);
+        
+        html.replace("__ADDRESS__", qaddress);
+        html.replace("__PRIVATE__", qsecret);
+        
+        QTextDocument document;
+        document.addResource(QTextDocument::ImageResource, QUrl(":qr1.png" ), img1);
+        document.addResource(QTextDocument::ImageResource, QUrl(":qr2.png" ), img2);
+        document.setHtml(html);
+        document.setPageSize(QSizeF(printer.pageRect(QPrinter::Point).size()));
+        document.print(&printer);
+	}	
+}

src/qt/paperwallet.h

@@ -0,0 +1,9 @@
+#ifndef PAPERWALLET_H__
+#define PAPERWALLET_H__
+
+#include <QWidget>
+
+void PrintPaperWallet (QWidget * parent);
+
+#endif
+

src/qt/paperwallet.qrc

@@ -0,0 +1,5 @@
+<!DOCTYPE RCC><RCC version="1.0">
+	<qresource prefix="/html">
+        <file alias="paperwallet">res/html/paperwallet.html</file>
+    </qresource>
+</RCC>

src/qt/res/html/paperwallet.html

@@ -0,0 +1,77 @@
+<!DOCTYPE html>
+<html>
+<head lang="en">
+	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+	<title></title>
+</head>
+<body style="font-family: sans-serif; font-size: 9px; height: 842px; width: 595px; margin-left: auto; margin-right: auto;">
+	<table style="width: 100%; margin-bottom: 10px"  border="1px" cellpadding="10px">
+		<tr style="vertical-align: top">
+			<td align="left" width="50%">
+				<img src=":qr1.png"/>
+				<h4>
+					Your deposit address:
+				</h4>
+				<div style="margin-bottom: 10px">
+					__ADDRESS__
+				</div>
+				<div>
+					<p>Use this address to deposit your Gostcoins. </p> 
+                    <p>The balance and transactoin history you can find in public blockchain: <a href=«http://explorer.gostco.in»>http://explorer.gostco.in</a></p> <br /><br /><br /><br />
+
+				</div>
+			</td>
+			<td align="left" width="50%">
+				<img src=":qr2.png"/>
+				<!--width="150" height="150"/>-->
+				<h4>
+					Your key to send Gostcoins:
+				</h4>
+				<div style="margin-bottom: 10px">
+					__PRIVATE__
+				</div>
+				<div>
+					<p>To send your Gostcoins you need to import this key into you wallet, using importprivkey command.</p> 
+				</div>
+			</td>
+		</tr>
+		<tr style="margin-bottom: 20px">
+			<td colspan="2" >
+				<h3>
+					Attention!
+				</h3>
+				<div>
+					<ul> 
+						<li> You should use a paper wallet only once.  When you import your key it stays forever</li>
+						<li>If you lose your key, you will lose your Gostcoins</li>
+						<li>All transactions on the Gostcoin network irrevocable, they can not be canceled. Be careful when entering addresses to avoid typos. If possible, use the QR-code reading function.</li>
+					</ul> 
+				</div>
+			</td>
+		</tr>
+		<tr>
+			<td colspan="2">
+				<table  style="margin-bottom: 10px; margin-top: 10px">
+					<tr>
+						<td width="200">
+							<div style="display: inline-block;">
+								<img src=":/icons/che_cash_print" width="160" height="107">
+							</div>
+						</td>
+						<td>
+							<div style="display: inline-block; vertical-align: top; margin-left: 20px">
+								<h2>GOST Coin (GST)</h2>
+								<div>
+									<h3>
+										Paper wallet
+									</h3>
+								</div>
+							</div>
+						</td>
+					</tr>
+				</table>
+			</td>
+		</tr>
+	</table>
+</body>
+</html>