Add basic start/shutdown functionality

src/Makefile.qt.include

@@ -35,6 +35,7 @@ QT_FORMS_UI = \
   qt/forms/transactiondescdialog.ui
 
 QT_MOC_CPP = \
+  qml/moc_nodemodel.cpp \
   qt/moc_addressbookpage.cpp \
   qt/moc_addresstablemodel.cpp \
   qt/moc_askpassphrasedialog.cpp \
@@ -107,6 +108,7 @@ QT_QRC_LOCALE = qt/bitcoin_locale.qrc
 
 BITCOIN_QT_H = \
   qml/bitcoin.h \
+  qml/nodemodel.h \
   qt/addressbookpage.h \
   qt/addresstablemodel.h \
   qt/askpassphrasedialog.h \
@@ -281,7 +283,8 @@ BITCOIN_QT_WALLET_CPP = \
   qt/walletview.cpp
 
 BITCOIN_QML_BASE_CPP = \
-  qml/bitcoin.cpp
+  qml/bitcoin.cpp \
+  qml/nodemodel.cpp
 
 QML_QRC_CPP = qml/qrc_bitcoin.cpp
 QML_QRC = qml/bitcoin_qml.qrc

src/qml/.gitignore

@@ -0,0 +1 @@
+/moc_*.cpp

src/qml/bitcoin.cpp

@@ -9,7 +9,9 @@
 #include <node/context.h>
 #include <node/ui_interface.h>
 #include <noui.h>
+#include <qml/nodemodel.h>
 #include <qt/guiconstants.h>
+#include <qt/initexecutor.h>
 #include <util/system.h>
 #include <util/translation.h>
 
@@ -18,6 +20,7 @@
 
 #include <QGuiApplication>
 #include <QQmlApplicationEngine>
+#include <QQmlContext>
 #include <QStringLiteral>
 #include <QUrl>
 
@@ -34,23 +37,10 @@ void SetupUIArgs(ArgsManager& argsman)
 
 int QmlGuiMain(int argc, char* argv[])
 {
-    NodeContext node_context;
-    std::unique_ptr<interfaces::Node> node = interfaces::MakeNode(&node_context);
-
-    // Subscribe to global signals from core
-    boost::signals2::scoped_connection handler_message_box = ::uiInterface.ThreadSafeMessageBox_connect(noui_ThreadSafeMessageBox);
-    boost::signals2::scoped_connection handler_question = ::uiInterface.ThreadSafeQuestion_connect(noui_ThreadSafeQuestion);
-    boost::signals2::scoped_connection handler_init_message = ::uiInterface.InitMessage_connect(noui_InitMessage);
-
     Q_INIT_RESOURCE(bitcoin_qml);
 
     QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
     QGuiApplication app(argc, argv);
-    QQmlApplicationEngine engine;
-    engine.load(QUrl(QStringLiteral("qrc:///qml/pages/stub.qml")));
-    if (engine.rootObjects().isEmpty()) {
-        return EXIT_FAILURE;
-    }
 
     // Parse command-line options. We do this after qt in order to show an error if there are problems parsing these.
     SetupServerArgs(gArgs);
@@ -61,5 +51,44 @@ int QmlGuiMain(int argc, char* argv[])
         return EXIT_FAILURE;
     }
 
-    return app.exec();
+    CheckDataDirOption();
+
+    gArgs.ReadConfigFiles(error, true);
+
+    SelectParams(gArgs.GetChainName());
+
+    // Default printtoconsole to false for the GUI. GUI programs should not
+    // print to the console unnecessarily.
+    gArgs.SoftSetBoolArg("-printtoconsole", false);
+    InitLogging(gArgs);
+    InitParameterInteraction(gArgs);
+
+    NodeContext node_context;
+    node_context.args = &gArgs;
+    std::unique_ptr<interfaces::Node> node = interfaces::MakeNode(&node_context);
+    node->baseInitialize();
+
+    NodeModel node_model;
+    InitExecutor init_executor{*node};
+    QObject::connect(&node_model, &NodeModel::requestedInitialize, &init_executor, &InitExecutor::initialize);
+    QObject::connect(&node_model, &NodeModel::requestedShutdown, &init_executor, &InitExecutor::shutdown);
+    // QObject::connect(&init_executor, &InitExecutor::initializeResult, &node_model, &NodeModel::initializeResult);
+    QObject::connect(&init_executor, &InitExecutor::shutdownResult, qGuiApp, &QGuiApplication::quit, Qt::QueuedConnection);
+    // QObject::connect(&init_executor, &InitExecutor::runawayException, &node_model, &NodeModel::handleRunawayException);
+
+    qGuiApp->setQuitOnLastWindowClosed(false);
+    QObject::connect(qGuiApp, &QGuiApplication::lastWindowClosed, [&] {
+        node->startShutdown();
+        node_model.startNodeShutdown();
+    });
+
+    QQmlApplicationEngine engine;
+    engine.rootContext()->setContextProperty("nodeModel", &node_model);
+
+    engine.load(QUrl(QStringLiteral("qrc:///qml/pages/stub.qml")));
+    if (engine.rootObjects().isEmpty()) {
+        return EXIT_FAILURE;
+    }
+
+    return qGuiApp->exec();
 }

src/qml/nodemodel.cpp

@@ -0,0 +1,17 @@
+// Copyright (c) 2021 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <qml/nodemodel.h>
+
+#include <QDebug>
+
+void NodeModel::startNodeInitializionThread()
+{
+    Q_EMIT requestedInitialize();
+}
+
+void NodeModel::startNodeShutdown()
+{
+    Q_EMIT requestedShutdown();
+}

src/qml/nodemodel.h

@@ -0,0 +1,24 @@
+// Copyright (c) 2021 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_QML_NODEMODEL_H
+#define BITCOIN_QML_NODEMODEL_H
+
+#include <QObject>
+
+/** Model for Bitcoin network client. */
+class NodeModel : public QObject
+{
+    Q_OBJECT
+
+public:
+    Q_INVOKABLE void startNodeInitializionThread();
+    void startNodeShutdown();
+
+Q_SIGNALS:
+    void requestedInitialize();
+    void requestedShutdown();
+};
+
+#endif // BITCOIN_QML_NODEMODEL_H

src/qml/pages/stub.qml

@@ -1,3 +1,4 @@
+import QtQml 2.12
 import QtQuick.Controls 2.12
 
 ApplicationWindow {
@@ -6,4 +7,6 @@ ApplicationWindow {
     minimumWidth: 750
     minimumHeight: 450
     visible: true
+
+    Component.onCompleted: nodeModel.startNodeInitializionThread();
 }