Query can be edited. Project database can be exported

User can now define the information to display in the nomenclature
table. WIP
The internal database of project can be exported to file.

sources/dataBase/projectdatabase.cpp

@@ -1,4 +1,4 @@
-/*
+/*
 		Copyright 2006-2020 QElectroTech Team
 		This file is part of QElectroTech.
 
@@ -20,6 +20,8 @@
 #include "qetproject.h"
 #include "elementprovider.h"
 #include "element.h"
+#include "diagram.h"
+#include "diagramposition.h"
 
 #include <QSqlError>
 
@@ -36,6 +38,13 @@ projectDataBase::projectDataBase(QETProject *project, QObject *parent) :
 	createDataBase();
 }
 
+projectDataBase::projectDataBase(QETProject *project, const QString &connection_name, const QString &path, QObject *parent) :
+	QObject(parent),
+	m_project(project)
+{
+	createDataBase(connection_name, path);
+}
+
 /**
  * @brief projectDataBase::~projectDataBase
  * Destructor
@@ -75,6 +84,39 @@ QVector<QStringList> projectDataBase::elementsInfoFromQuery(const QString &query
 	return result_;
 }
 
+/**
+ * @brief projectDataBase::headersFromElementsInfoQuery
+ * @param query
+ * @return the header according to @query.
+ * Header can be false, notably when user create is own query.
+ */
+QStringList projectDataBase::headersFromElementsInfoQuery(const QString &query)
+{
+	QStringList header_string;
+	if (query.startsWith("SELECT ") && query.contains("FROM"))
+	{
+		auto header = query;
+		header.remove(0, 7); //Remove SELECT from the string;
+		header.truncate(header.indexOf("FROM")); //Now we only have the string between SELECT and FROM
+		header.replace(" ", ""); //remove white space
+		QStringList list = header.split(",");
+
+		if (!list.isEmpty())
+		{
+			for (int i=0 ; i<list.size() ; i++)
+			{
+				if (list.at(i) == "pos") {
+					header_string.append(tr("Position"));
+				} else {
+					header_string.append(QETApp::elementTranslatedInfoKey(list.at(i)));
+				}
+			}
+		}
+	}
+
+	return header_string;
+}
+
 /**
  * @brief projectDataBase::updateDB
  * Up to date the content of the data base.
@@ -89,20 +131,33 @@ void projectDataBase::updateDB()
 	emit dataBaseUpdated();
 }
 
+/**
+ * @brief projectDataBase::project
+ * @return the project of this  database
+ */
+QETProject *projectDataBase::project() const {
+	return m_project;
+}
+
 /**
  * @brief projectDataBase::createDataBase
  * Create the data base
  * @return : true if the data base was successfully created.
  */
-bool projectDataBase::createDataBase()
+bool projectDataBase::createDataBase(const QString &connection_name, const QString &name)
 {
-	QString connect_name("qet_project_db_" + m_project->uuid().toString());
+
+	QString connect_name=connection_name;
+	if (connect_name.isEmpty()) {
+		connect_name = "qet_project_db_" + m_project->uuid().toString();
+	}
 	if (m_data_base.connectionNames().contains(connect_name)) {
 		m_data_base = QSqlDatabase::database(connect_name);
 	}
 	else
 	{
 		m_data_base = QSqlDatabase::addDatabase("QSQLITE", connect_name);
+		m_data_base.setDatabaseName(name);
 		if(!m_data_base.open())
 		{
 			m_data_base.close();
@@ -177,6 +232,7 @@ void projectDataBase::populateElementsTable()
 
 			query.bindValue(":element_type", elmt->linkTypeToString());
 			query.bindValue(":element_subtype", elmt->kindInformations()["type"].toString());
+			query.bindValue(":pos", elmt->diagram()->convertPosition(elmt->scenePos()).toString());
 
 			if (!query.exec()) {
 				qDebug() << "projectDataBase::populateElementsTable insert error : " << query.lastError();
@@ -210,10 +266,47 @@ QHash<QString, QString> projectDataBase::elementInfoToString(Element *elmt)
  * @brief projectDataBase::elementsInfoKeys
  * @return QETApp::elementInfoKeys() + "element_type" and "element_subtype"
  */
-QStringList projectDataBase::elementsInfoKeys() const
+QStringList projectDataBase::elementsInfoKeys()
 {
 	auto keys_ = QETApp::elementInfoKeys();
-	keys_<< "element_type" << "element_subtype";
+	keys_<< "element_type" << "subtype" << "pos";
 
 	return keys_;
 }
+
+/**
+ * @brief projectDataBase::exportDb
+ * @param parent
+ * @param caption
+ * @param dir
+ * @param filter
+ * @param selectedFilter
+ * @param options
+ */
+void projectDataBase::exportDb(projectDataBase *db, QWidget *parent, const QString &caption, const QString &dir)
+{
+	auto caption_ = caption;
+	if (caption_.isEmpty()) {
+		caption_ = tr("Exporter la base de données interne du projet");
+	}
+
+	auto dir_ = dir;
+	if(dir_.isEmpty()) {
+		dir_ = db->project()->filePath();
+		if (dir_.isEmpty()) {
+			dir_ = QStandardPaths::standardLocations(QStandardPaths::DocumentsLocation).first();
+			dir_ += QString("/") += tr("sans_nom") += ".sqlite";
+		} else {
+			dir_.remove(".qet");
+			dir_.append(".sqlite");
+		}
+	}
+
+	auto path_ = QFileDialog::getSaveFileName(parent, caption_, dir_, "*.sqlite");
+	if (path_.isNull()) {
+		return;
+	}
+
+		//Database is filled at creation, work is done.
+	projectDataBase file_db(db->project(), "export_project_db_" + db->project()->uuid().toString(), path_);
+}