well defined ui loading order

using boost exceptions

mix/AppContext.cpp

@@ -22,7 +22,6 @@
  * - KeyEventManager
  */
 
-#include <stdexcept>
 #include <QDebug>
 #include <QMessageBox>
 #include <QQmlComponent>
@@ -32,6 +31,8 @@
 #include "CodeModel.h"
 #include "FileIo.h"
 #include "ClientModel.h"
+#include "CodeEditorExtensionManager.h"
+#include "Exceptions.h"
 #include "AppContext.h"
 
 using namespace dev;
@@ -47,21 +48,31 @@ AppContext::AppContext(QQmlApplicationEngine* _engine)
 	m_codeModel.reset(new CodeModel(this));
 	m_clientModel.reset(new ClientModel(this));
 	m_fileIo.reset(new FileIo());
+}
+
+AppContext::~AppContext()
+{
+}
+
+void AppContext::load()
+{
 	m_applicationEngine->rootContext()->setContextProperty("appContext", this);
 	qmlRegisterType<FileIo>("org.ethereum.qml", 1, 0, "FileIo");
+	m_applicationEngine->rootContext()->setContextProperty("codeModel", m_codeModel.get());
+	m_applicationEngine->rootContext()->setContextProperty("fileIo", m_fileIo.get());
 	QQmlComponent projectModelComponent(m_applicationEngine, QUrl("qrc:/qml/ProjectModel.qml"));
 	QObject* projectModel = projectModelComponent.create();
 	if (projectModelComponent.isError())
-		throw std::runtime_error("Error loading ProjectModel: " + projectModelComponent.errorString().toStdString());
-	QQmlEngine::setObjectOwnership(projectModel, QQmlEngine::JavaScriptOwnership);
+	{
+		QmlLoadException exception;
+		for (auto const& e : projectModelComponent.errors())
+			exception << QmlErrorInfo(e);
+		BOOST_THROW_EXCEPTION(exception);
+	}
 	m_applicationEngine->rootContext()->setContextProperty("projectModel", projectModel);
-	m_applicationEngine->rootContext()->setContextProperty("codeModel", m_codeModel.get());
-	m_applicationEngine->rootContext()->setContextProperty("fileIo", m_fileIo.get());
-
-}
-
-AppContext::~AppContext()
-{
+	qmlRegisterType<CodeEditorExtensionManager>("CodeEditorExtensionManager", 1, 0, "CodeEditorExtensionManager");
+	m_applicationEngine->load(QUrl("qrc:/qml/main.qml"));
+	appLoaded();
 }
 
 QQmlApplicationEngine* AppContext::appEngine()

mix/AppContext.h

@@ -60,6 +60,8 @@ class AppContext: public QObject
 public:
 	AppContext(QQmlApplicationEngine* _engine);
 	virtual ~AppContext();
+	/// Load the UI from qml files
+	void load();
 	/// Get the current QQMLApplicationEngine instance.
 	QQmlApplicationEngine* appEngine();
 	/// Get code model

mix/Exceptions.cpp

@@ -0,0 +1,31 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file Exceptions.cpp
+ * @author Arkadiy Paronyan arkadiy@ethdev.com
+ * @date 2015
+ * Ethereum IDE client.
+ */
+
+#include <ostream>
+#include <QQmlError>
+#include "Exceptions.h"
+
+std::ostream& operator<<(std::ostream& _out, QQmlError const& _error)
+{
+	_out << _error.toString().toStdString();
+	return _out;
+}

mix/Exceptions.h

@@ -0,0 +1,45 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file Exceptions.h
+ * @author Arkadiy Paronyan arkadiy@ethdev.com
+ * @date 2015
+ * Ethereum IDE client.
+ */
+
+#pragma once
+
+#include <iosfwd>
+#include <libdevcore/Exceptions.h>
+
+class QTextDocument;
+class QQmlError;
+
+namespace dev
+{
+namespace mix
+{
+
+struct QmlLoadException: virtual Exception {};
+struct FileIoException: virtual Exception {};
+
+typedef boost::error_info<struct tagQmlError, QQmlError> QmlErrorInfo;
+typedef boost::error_info<struct tagFileError, std::string> FileError;
+
+}
+}
+
+std::ostream& operator<<(std::ostream& _out, QQmlError const& _error);

mix/FileIo.cpp

@@ -20,7 +20,6 @@
  * Ethereum IDE client.
  */
 
-#include <stdexcept>
 #include <QDir>
 #include <QFile>
 #include <QFileInfo>

mix/MixApplication.cpp

@@ -21,7 +21,6 @@
 
 #include <QDebug>
 #include <QQmlApplicationEngine>
-#include "CodeEditorExtensionManager.h"
 #include "MixApplication.h"
 #include "AppContext.h"
 
@@ -32,10 +31,8 @@ using namespace dev::mix;
 MixApplication::MixApplication(int _argc, char* _argv[]):
 	QApplication(_argc, _argv), m_engine(new QQmlApplicationEngine()), m_appContext(new AppContext(m_engine.get()))
 {
-	qmlRegisterType<CodeEditorExtensionManager>("CodeEditorExtensionManager", 1, 0, "CodeEditorExtensionManager");
 	QObject::connect(this, SIGNAL(lastWindowClosed()), context(), SLOT(quitApplication())); //use to kill ApplicationContext and other stuff
-	m_engine->load(QUrl("qrc:/qml/main.qml"));
-	m_appContext->appLoaded();
+	m_appContext->load();
 }
 
 MixApplication::~MixApplication()

mix/main.cpp

@@ -20,11 +20,24 @@
  * Ethereum IDE client.
  */
 
+#include <iostream>
 #include "MixApplication.h"
+#include "Exceptions.h"
 using namespace dev::mix;
 
 int main(int _argc, char* _argv[])
 {
-	MixApplication app(_argc, _argv);
-	return app.exec();
+	try
+	{
+		MixApplication app(_argc, _argv);
+		return app.exec();
+	}
+	catch (boost::exception const& _e)
+	{
+		std::cerr << boost::diagnostic_information(_e);
+	}
+	catch (std::exception const& _e)
+	{
+		std::cerr << _e.what();
+	}
 }

mix/qml/ProjectModel.qml

@@ -44,7 +44,7 @@ Item {
 		target: appContext
 		onAppLoaded: {
 			if (projectSettings.lastProjectPath)
-				loadProject(projectSettings.lastProjectPath)
+				projectModel.loadProject(projectSettings.lastProjectPath)
 		}
 	}