gui: Show indeterminate progress dialog while opening walllet

Author: promag

src/qt/bitcoingui.cpp

@@ -370,10 +370,29 @@ void BitcoinGUI::createActions()
             for (std::string path : m_wallet_controller->getWalletsAvailableToOpen()) {
                 QString name = path.empty() ? QString("["+tr("default wallet")+"]") : QString::fromStdString(path);
                 QAction* action = m_open_wallet_action->menu()->addAction(name);
-                connect(action, &QAction::triggered, [this, path] {
+                connect(action, &QAction::triggered, [this, name, path] {
                     OpenWalletActivity* activity = m_wallet_controller->openWallet(path);
+
+                    QProgressDialog* dialog = new QProgressDialog(this);
+                    dialog->setLabelText(tr("Opening Wallet <b>%1</b>...").arg(name.toHtmlEscaped()));
+                    dialog->setRange(0, 0);
+                    dialog->setCancelButton(nullptr);
+                    dialog->setWindowModality(Qt::ApplicationModal);
+                    dialog->show();
+
+                    connect(activity, &OpenWalletActivity::message, this, [this] (QMessageBox::Icon icon, QString text) {
+                        QMessageBox box;
+                        box.setIcon(icon);
+                        box.setText(tr("Open Wallet Failed"));
+                        box.setInformativeText(text);
+                        box.setStandardButtons(QMessageBox::Ok);
+                        box.setDefaultButton(QMessageBox::Ok);
+                        connect(this, &QObject::destroyed, &box, &QDialog::accept);
+                        box.exec();
+                    });
                     connect(activity, &OpenWalletActivity::opened, this, &BitcoinGUI::setCurrentWallet);
                     connect(activity, &OpenWalletActivity::finished, activity, &QObject::deleteLater);
+                    connect(activity, &OpenWalletActivity::finished, dialog, &QObject::deleteLater);
                 });
             }
         });