merge

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "singleapplication"]
+	path = singleapplication
+	url = git@github.com:itay-grudev/SingleApplication.git

singleapplication

@@ -0,0 +1 @@
+Subproject commit 7163d166a1fbce7917015293f8e139bd65604881

src/main.cpp

@@ -1,3 +1,6 @@
+#include <singleapplication.h>
+
+#include "precompiled.h"
 #include "mainwindow.h"
 #include "rpc.h"
 #include "settings.h"
@@ -155,7 +158,34 @@ public:
         QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
         QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
 
-        QApplication a(argc, argv);
+        SingleApplication a(argc, argv, true);
+
+        // Command line parser
+        QCommandLineParser parser;
+        parser.setApplicationDescription("Shielded desktop wallet and embedded full node for Zcash");
+        parser.addHelpOption();
+
+        // A boolean option for running it headless
+        QCommandLineOption headlessOption(QStringList() << "headless", "Running it via GUI.");
+        parser.addOption(headlessOption);
+
+        // No embedded will disable the embedded zcashd node
+        QCommandLineOption noembeddedOption(QStringList() << "no-embedded", "Disable embedded zcashd");
+        parser.addOption(noembeddedOption);
+
+        // Positional argument will specify a zcash payment URI
+        parser.addPositionalArgument("zcashURI", "An optional zcash URI to pay");
+
+        parser.process(a);
+
+        // Check for a positional argument indicating a zcash payment URI
+        if (a.isSecondary()) {
+            if (parser.positionalArguments().length() > 0) {
+                a.sendMessage(parser.positionalArguments()[0].toUtf8());    
+            }
+            a.exit( 0 );
+            return 0;            
+        } 
 
         QCoreApplication::setOrganizationName("zec-qt-wallet-org");
         QCoreApplication::setApplicationName("zec-qt-wallet");
@@ -194,19 +224,7 @@ public:
             exit(0);
         }
 
-        // Command line parser
-        QCommandLineParser parser;
-        parser.setApplicationDescription("Shielded desktop wallet and embedded full node for Zcash");
-        parser.addHelpOption();
-
-        // A boolean option for running it headless
-        QCommandLineOption headlessOption(QStringList() << "headless", "Running it via GUI.");
-        parser.addOption(headlessOption);
-
-        QCommandLineOption noembeddedOption(QStringList() << "no-embedded", "Disable embedded zcashd");
-        parser.addOption(noembeddedOption);
-
-        parser.process(a);
+        // Check for embedded option
         if (parser.isSet(noembeddedOption)) {
             Settings::getInstance()->setUseEmbedded(false);
         } else {
@@ -216,6 +234,20 @@ public:
         w = new MainWindow();
         w->setWindowTitle("ZecWallet v" + QString(APP_VERSION));
 
+        // If there was a payment URI on the command line, pay it
+        if (parser.positionalArguments().length() > 0) {
+            w->payZcashURI(parser.positionalArguments()[0]);
+        }
+
+        // Listen for any secondary instances telling us about a zcash payment URI
+        QObject::connect(&a, &SingleApplication::receivedMessage, [=] (quint32, QByteArray msg) {
+            QString uri(msg);
+
+            // We need to execute this async, otherwise the app seems to crash for some reason.
+            QTimer::singleShot(1, [=]() { w->payZcashURI(uri); });            
+        });   
+
+        // Check if starting headless
         if (parser.isSet(headlessOption)) {
             Settings::getInstance()->setHeadless(true);
             a.setQuitOnLastWindowClosed(false);    

src/mainwindow.cpp

@@ -46,7 +46,9 @@ MainWindow::MainWindow(QWidget *parent) :
     });
 
     // Pay Zcash URI
-    QObject::connect(ui->actionPay_URI, &QAction::triggered, this, &MainWindow::payZcashURI);
+    QObject::connect(ui->actionPay_URI, &QAction::triggered, [=] () {
+        payZcashURI();
+    });
 
     // Import Private Key
     QObject::connect(ui->actionImport_Private_Key, &QAction::triggered, this, &MainWindow::importPrivKey);
@@ -722,17 +724,50 @@ void MainWindow::doImport(QList<QString>* keys) {
     }
 }
 
-void MainWindow::payZcashURI() {
+
+// Callback invoked when the RPC has finished loading all the balances, and the UI 
+// is now ready to send transactions.
+void MainWindow::balancesReady() {
+    // First-time check
+    if (uiPaymentsReady)
+        return;
+
+    uiPaymentsReady = true;
+    qDebug() << "Payment UI now ready!";
+
+    // There is a pending URI payment (from the command line, or from a secondary instance),
+    // process it.
+    if (!pendingURIPayment.isEmpty()) {
+        qDebug() << "Paying zcash URI";
+        payZcashURI(pendingURIPayment);
+        pendingURIPayment = "";
+    }
+
+}
+
+// Pay the Zcash URI by showing a confirmation window. If the URI parameter is empty, the UI
+// will prompt for one.
+void MainWindow::payZcashURI(QString uri) {
+    // If the Payments UI is not ready (i.e, all balances have not loaded), defer the payment URI
+    if (!uiPaymentsReady) {
+        qDebug() << "Payment UI not ready, waiting for UI to pay URI";
+        pendingURIPayment = uri;
+        return;
+    }
+
     // Error to display if something goes wrong.
     auto payZcashURIError = [=] (QString errorDetail = "") {
         QMessageBox::critical(this, tr("Error paying zcash URI"), 
                 tr("URI should be of the form 'zcash:<addr>?amt=x&memo=y") + "\n" + errorDetail);
     };
 
-    // Read a zcash URI and pay it
-    QString uri = QInputDialog::getText(this, tr("Paste Zcash URI"),
-        "Zcash URI" + QString(" ").repeated(180));
+    // If there was no URI passed, ask the user for one.
+    if (uri.isEmpty()) {
+        uri = QInputDialog::getText(this, tr("Paste Zcash URI"),
+            "Zcash URI" + QString(" ").repeated(180));
+    }
 
+    // If there's no URI, just exit
     if (uri.isEmpty())
         return;
 
@@ -743,6 +778,7 @@ void MainWindow::payZcashURI() {
     }
 
     // Extract the address
+    qDebug() << "Recieved URI " << uri;
     uri = uri.right(uri.length() - QString("zcash:").length());
 
     QRegExp re("([a-zA-Z0-9]+)");

src/mainwindow.h

@@ -50,6 +50,9 @@ public:
     void createWebsocket(QString wormholecode);
     void stopWebsocket();
 
+    void balancesReady();
+    void payZcashURI(QString uri = "");
+
     void updateLabels();
     void updateTAddrCombo(bool checked);
     void updateFromCombo();
@@ -105,7 +108,6 @@ private:
     
     void donate();
     void addressBook();
-    void payZcashURI();
     void postToZBoard();
     void importPrivKey();
     void exportAllKeys();
@@ -117,6 +119,9 @@ private:
 
     void restoreSavedStates();
 
+    bool            uiPaymentsReady    = false;
+    QString         pendingURIPayment;
+
     WSServer*       wsserver = nullptr;
     WormholeClient* wormhole = nullptr;
 

src/precompiled.h

@@ -40,6 +40,7 @@
 #include <QTemporaryFile>
 #include <QErrorMessage>
 #include <QApplication>
+#include <QWindow>
 #include <QStandardPaths>
 #include <QMainWindow>
 #include <QPushButton>

src/rpc.cpp

@@ -87,9 +87,8 @@ void RPC::setConnection(Connection* c) {
 
     ui->statusBar->showMessage("Ready!");
 
-    refreshZECPrice();
-    // Commented for Android beta. 
-    // checkForUpdate();
+    refreshZECPrice();    
+    checkForUpdate();
 
     // Force update, because this might be coming from a settings update
     // where we need to immediately refresh
@@ -772,7 +771,9 @@ void RPC::refreshBalances() {
             allBalances = newBalances;
             utxos       = newUtxos;
 
-            updateUI(anyTUnconfirmed || anyZUnconfirmed);    
+            updateUI(anyTUnconfirmed || anyZUnconfirmed);
+
+            main->balancesReady();
         });        
     });
 }
@@ -996,7 +997,7 @@ void RPC::checkForUpdate(bool silent) {
 
                 qDebug() << "Version check: Current " << currentVersion << ", Available " << maxVersion;
 
-                if (maxVersion > currentVersion && maxVersion > maxHiddenVersion) {
+                if (maxVersion > currentVersion && (!silent || maxVersion > maxHiddenVersion)) {
                     auto ans = QMessageBox::information(main, QObject::tr("Update Available"), 
                         QObject::tr("A new release v%1 is available! You have v%2.\n\nWould you like to visit the releases page?")
                             .arg(maxVersion.toString())

zec-qt-wallet.pro

@@ -104,6 +104,9 @@ TRANSLATIONS = res/zec_qt_wallet_es.ts \
                res/zec_qt_wallet_pt.ts \
                res/zec_qt_wallet_it.ts 
 
+include(singleapplication/singleapplication.pri)
+DEFINES += QAPPLICATION_CLASS=QApplication
+
 win32: RC_ICONS = res/icon.ico
 ICON = res/logo.icns