diff --git a/CMakeLists.txt b/CMakeLists.txt
index 794ac6eb5..4b79a7d37 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,10 +16,10 @@
 
 include(cmake/hoto_update_cmake_message.cmake)
 
-cmake_minimum_required(VERSION 3.14...3.19 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.21.1 FATAL_ERROR)
 
 project(qelectrotech
-  VERSION 0.9.0
+  VERSION 0.100.0
   DESCRIPTION "QET is a CAD/CAE editor focusing on schematics drawing features."
   HOMEPAGE_URL "https://qelectrotech.org/"
   LANGUAGES CXX)
@@ -27,9 +27,16 @@ project(qelectrotech
 include(cmake/copyright_message.cmake)
 
 set(QET_DIR ${PROJECT_SOURCE_DIR})
+include(cmake/qet_compilation_vars.cmake)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package(Qt6 REQUIRED COMPONENTS ${QET_COMPONENTS})
+qt_standard_project_setup()
 
 # Add sub directories
-option(PACKAGE_TESTS "Build the tests" ON)
+option(PACKAGE_TESTS "Build the tests" NO)
 if(PACKAGE_TESTS)
   message("Add sub directory tests")
   add_subdirectory(tests)
@@ -43,42 +50,19 @@ include(cmake/git_last_commit_sha.cmake)
 include(cmake/fetch_kdeaddons.cmake)
 include(cmake/fetch_singleapplication.cmake)
 include(cmake/fetch_pugixml.cmake)
-include(cmake/qet_compilation_vars.cmake)
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
-set(CMAKE_AUTOMOC ON)
 set(CMAKE_AUTORCC ON)
-set(CMAKE_AUTOUIC ON)
-
-SET(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
-find_package(
-  QT
- NAMES
-  Qt6
-  Qt5
- COMPONENTS
-  ${QET_COMPONENTS}
- REQUIRED
- )
-
-find_package(
-  Qt${QT_VERSION_MAJOR}
- COMPONENTS
- ${QET_COMPONENTS}
- REQUIRED)
 
 set(CMAKE_AUTOUIC_SEARCH_PATHS ${QET_DIR}/sources/ui)
-qt5_create_translation(QM_FILES ${CMAKE_SOURCE_DIR} ${TS_FILES})
-set_source_files_properties(${TS_FILES} PROPERTIES OUTPUT_LOCATION "${QET_DIR}/lang")
-qt5_add_translation(QM_FILES ${TS_FILES})
 
 # als laatse
 include(cmake/define_definitions.cmake)
 
-add_executable(
+find_package(KF6WidgetsAddons REQUIRED)
+
+qt_add_executable(
   ${PROJECT_NAME}
   ${QET_RES_FILES}
   ${QET_SRC_FILES}
@@ -86,14 +70,26 @@ add_executable(
   ${QET_DIR}/qelectrotech.qrc
   )
 
+if(QMFILES_AS_RESOURCE)
+  qt_add_translations(${PROJECT_NAME} TS_FILES ${TS_FILES} RESOURCE_PREFIX "/lang")
+else()
+  qt_create_translation(QM_FILES ${CMAKE_SOURCE_DIR} ${TS_FILES})
+  set_source_files_properties(${TS_FILES} PROPERTIES OUTPUT_LOCATION "${QET_DIR}/lang")
+  qt_add_translation(QM_FILES ${TS_FILES})
+endif()
+
+find_package(SQLite3 REQUIRED)
+
 target_link_libraries(
   ${PROJECT_NAME}
   PUBLIC
   PRIVATE
   pugixml::pugixml
   SingleApplication::SingleApplication
-  ${KF5_PRIVATE_LIBRARIES}
+  SQLite::SQLite3
+  ${KF6_PRIVATE_LIBRARIES}
   ${QET_PRIVATE_LIBRARIES}
+  KF6::WidgetsAddons
   )
 
 target_include_directories(
@@ -149,6 +145,7 @@ install(FILES LICENSE ELEMENTS.LICENSE CREDIT README ChangeLog DESTINATION share
 install(FILES misc/org.qelectrotech.qelectrotech.desktop DESTINATION share/applications)
 install(FILES misc/qelectrotech.xml DESTINATION share/mime/packages)
 install(FILES misc/qelectrotech.appdata.xml DESTINATION ${QET_APPDATA_PATH})
-install(FILES ${QM_FILES} DESTINATION ${QET_LANG_PATH})
-
+if(NOT QMFILES_AS_RESOURCE)
+  install(FILES ${QM_FILES} DESTINATION ${QET_LANG_PATH})
+endif()
 endif()
diff --git a/cmake/define_definitions.cmake b/cmake/define_definitions.cmake
index 7f9cb6ae0..928af15bd 100644
--- a/cmake/define_definitions.cmake
+++ b/cmake/define_definitions.cmake
@@ -62,10 +62,15 @@ message("PROJECT_SOURCE_DIR        :" ${PROJECT_SOURCE_DIR})
 message("QET_DIR                   :" ${QET_DIR})
 message("GIT_COMMIT_SHA            :" ${GIT_COMMIT_SHA})
 
-if(BUILD_WITH_KF5)
-  message("KF5_GIT_TAG               :" ${KF5_GIT_TAG})
-else()
-  add_definitions(-DBUILD_WITHOUT_KF5)
+if(BUILD_WITH_KF6 AND BUILD_KF6)
+  message("KF6_GIT_TAG               :" ${KF6_GIT_TAG})
+endif()
+if(NOT BUILD_WITH_KF6)
+  add_definitions(-DBUILD_WITHOUT_KF6)
 endif()
 message("QET_COMPONENTS            :" ${QET_COMPONENTS})
-message("QT_VERSION_MAJOR          :" ${QT_VERSION_MAJOR})
+message("Qt version                :" ${Qt6_VERSION})
+
+if(QMFILES_AS_RESOURCE)
+  add_definitions(-DQMFILES_AS_RESOURCE)
+endif()
diff --git a/cmake/developer_options.cmake b/cmake/developer_options.cmake
index 04f002da4..0431afd84 100644
--- a/cmake/developer_options.cmake
+++ b/cmake/developer_options.cmake
@@ -31,5 +31,8 @@ add_definitions(-DQT_MESSAGELOGCONTEXT)
 # In order to do so, uncomment the following line.
 #add_definitions(-DTODO_LIST)
 
-# Build with KF5
-option(BUILD_WITH_KF5 "Build with KF5" ON)
+# Build with KF6
+option(BUILD_WITH_KF6 "Build with KF6" ON)
+
+# Use translations as a Qt resource
+option(QMFILES_AS_RESOURCE "Use .qm files as Qt resource" ON)
diff --git a/cmake/fetch_kdeaddons.cmake b/cmake/fetch_kdeaddons.cmake
index ac5a340f9..fc8bd76e4 100644
--- a/cmake/fetch_kdeaddons.cmake
+++ b/cmake/fetch_kdeaddons.cmake
@@ -14,54 +14,47 @@
 # You should have received a copy of the GNU General Public License
 # along with QElectroTech. If not, see <http://www.gnu.org/licenses/>.
 
-message(" - fetch_kdeaddons")
+message(STATUS "fetch_kdeaddons")
 
-if(DEFINED BUILD_WITH_KF5)
-  Include(FetchContent)
+if(BUILD_WITH_KF6)
+  option(BUILD_KF6 "Build KF6 libraries, use system ones otherwise" OFF)
+  block(PROPAGATE KF6_GIT_TAG)
+  set(BUILD_TESTING OFF)
+  set(KDE_SKIP_TEST_SETTINGS ON)
+  set(BUILD_DESIGNERPLUGIN OFF)
+  set(KCOREADDONS_USE_QML OFF)
+  set(BUILD_QCH OFF)
+  set(BUILD_SHARED_LIBS OFF)
+  find_package(ECM 6.8.0 REQUIRED NO_MODULE)
+  list(APPEND CMAKE_MODULE_PATH ${ECM_MODULE_PATH})
 
-  option(BUILD_KF5 "Build KF5 libraries, use system ones otherwise" YES)
+  if(BUILD_KF6)
+    Include(FetchContent)
 
-  if(BUILD_KF5)
-
-    if(NOT DEFINED KF5_GIT_TAG)
-      #https://qelectrotech.org/forum/viewtopic.php?pid=13924#p13924
-      set(KF5_GIT_TAG v5.77.0)
+    if(NOT DEFINED KF6_GIT_TAG)
+      set(KF6_GIT_TAG v6.8.0)
     endif()
 
-    # Fix stop the run autotests of kcoreaddons
-    # see
-    # https://invent.kde.org/frameworks/kcoreaddons/-/blob/master/CMakeLists.txt#L98
-    # issue:
-    # CMake Error at /usr/share/ECM/modules/ECMAddTests.cmake:89 (add_executable):
-    # Cannot find source file:
-    # see
-    # https://qelectrotech.org/forum/viewtopic.php?pid=13929#p13929
-    set(KDE_SKIP_TEST_SETTINGS "TRUE")
-    set(BUILD_TESTING "0")
-    FetchContent_Declare(
-      ecm
-      GIT_REPOSITORY https://invent.kde.org/frameworks/extra-cmake-modules.git
-      GIT_TAG        ${KF5_GIT_TAG})
-    FetchContent_MakeAvailable(ecm)
-
     FetchContent_Declare(
       kcoreaddons
       GIT_REPOSITORY https://invent.kde.org/frameworks/kcoreaddons.git
-      GIT_TAG        ${KF5_GIT_TAG})
+      GIT_TAG        ${KF6_GIT_TAG})
     FetchContent_MakeAvailable(kcoreaddons)
+    get_target_property(kca_version KF6::CoreAddons VERSION)
 
-    FetchContent_Declare(
-      kwidgetsaddons
-      GIT_REPOSITORY https://invent.kde.org/frameworks/kwidgetsaddons.git
-      GIT_TAG        ${KF5_GIT_TAG})
-    FetchContent_MakeAvailable(kwidgetsaddons)
   else()
-    find_package(KF5CoreAddons REQUIRED)
-    find_package(KF5WidgetsAddons REQUIRED)
+    find_package(KF6CoreAddons REQUIRED)
+    set(kca_version ${KF6CoreAddons_VERSION})
   endif()
 
-  set(KF5_PRIVATE_LIBRARIES
-    KF5::WidgetsAddons
-    KF5::CoreAddons
+  get_target_property(kwa_type KF6::CoreAddons TYPE)
+
+  message(NOTICE "ecm version            : " ${ECM_VERSION})
+  message(NOTICE "kcoreaddons library    : " ${kca_type})
+  message(NOTICE "kcoreaddons version    : " ${kca_version})
+  endblock()
+
+  set(KF6_PRIVATE_LIBRARIES
+    KF6::CoreAddons
     )
 endif()
diff --git a/cmake/qet_compilation_vars.cmake b/cmake/qet_compilation_vars.cmake
index d0d33af19..389ec0bc3 100644
--- a/cmake/qet_compilation_vars.cmake
+++ b/cmake/qet_compilation_vars.cmake
@@ -17,6 +17,8 @@
 message(" - qet_compilation_vars")
 
 set(QET_COMPONENTS
+  Core
+  Gui
   LinguistTools
   PrintSupport
   Xml
@@ -109,6 +111,12 @@ set(QET_SRC_FILES
   ${QET_DIR}/sources/borderproperties.h
   ${QET_DIR}/sources/bordertitleblock.cpp
   ${QET_DIR}/sources/bordertitleblock.h
+  # ${QET_DIR}/sources/colorbutton.cpp
+  # ${QET_DIR}/sources/colorbutton.h
+  # ${QET_DIR}/sources/colorcombobox.cpp
+  # ${QET_DIR}/sources/colorcombobox.h
+  # ${QET_DIR}/sources/colorcomboboxdelegate.cpp
+  # ${QET_DIR}/sources/colorcomboboxdelegate.h
   ${QET_DIR}/sources/conductorautonumerotation.cpp
   ${QET_DIR}/sources/conductorautonumerotation.h
   ${QET_DIR}/sources/conductornumexport.cpp
@@ -726,19 +734,17 @@ set(TS_FILES
   ${QET_DIR}/lang/qet_mn.ts
   ${QET_DIR}/lang/qet_nb.ts
   ${QET_DIR}/lang/qet_nl.ts
-  ${QET_DIR}/lang/qet_nl_BE.ts  
+  ${QET_DIR}/lang/qet_nl_BE.ts
   ${QET_DIR}/lang/qet_no.ts
   ${QET_DIR}/lang/qet_pl.ts
   ${QET_DIR}/lang/qet_pt.ts
   ${QET_DIR}/lang/qet_pt_BR.ts
   ${QET_DIR}/lang/qet_ro.ts
-  ${QET_DIR}/lang/qet_rs.ts  
   ${QET_DIR}/lang/qet_ru.ts
   ${QET_DIR}/lang/qet_sk.ts
   ${QET_DIR}/lang/qet_sl.ts
   ${QET_DIR}/lang/qet_sr.ts
   ${QET_DIR}/lang/qet_sv.ts
   ${QET_DIR}/lang/qet_tr.ts
-  ${QET_DIR}/lang/qet_uk.ts
   ${QET_DIR}/lang/qet_zh.ts
   )
diff --git a/sources/ElementsCollection/elementslocation.cpp b/sources/ElementsCollection/elementslocation.cpp
index f236d9edb..d035d1ed4 100644
--- a/sources/ElementsCollection/elementslocation.cpp
+++ b/sources/ElementsCollection/elementslocation.cpp
@@ -807,13 +807,13 @@ bool ElementsLocation::setXml(const QDomDocument &xml_document) const
 			QString			   path_ = collectionPath(false);
 			QRegularExpression rx("^(.*)/(.*\\.elmt)$");
 
-			if (rx.exactMatch(path_))
+			if (auto regex_match = rx.match(path_); regex_match.hasMatch())
 			{
 				return project()
 					->embeddedElementCollection()
 					->addElementDefinition(
-						rx.cap(1),
-						rx.cap(2),
+						regex_match.captured(1),
+						regex_match.captured(2),
 						xml_document.documentElement());
 			}
 			else
diff --git a/sources/TerminalStrip/GraphicsItem/terminalstripdrawer.cpp b/sources/TerminalStrip/GraphicsItem/terminalstripdrawer.cpp
index fec36bccd..0e84cd116 100644
--- a/sources/TerminalStrip/GraphicsItem/terminalstripdrawer.cpp
+++ b/sources/TerminalStrip/GraphicsItem/terminalstripdrawer.cpp
@@ -18,6 +18,7 @@
 #include "terminalstripdrawer.h"
 
 #include <QPainter>
+#include <QHash>
 
 namespace TerminalStripDrawer {
 
diff --git a/sources/TerminalStrip/physicalterminal.cpp b/sources/TerminalStrip/physicalterminal.cpp
index b5d49acda..c2db79c2f 100644
--- a/sources/TerminalStrip/physicalterminal.cpp
+++ b/sources/TerminalStrip/physicalterminal.cpp
@@ -131,7 +131,7 @@ bool PhysicalTerminal::setLevelOf(const QSharedPointer<RealTerminal> &terminal,
 	if (i >= 0)
 	{
 #if QT_VERSION >= QT_VERSION_CHECK(5,14,0)
-		m_real_terminal.swapItemsAt(i, std::min(level, m_real_terminal.size()-1));
+		m_real_terminal.swapItemsAt(i, std::min(static_cast<qsizetype>(level), m_real_terminal.size()-1));
 #else
 		auto j = std::min(level, m_real_terminal.size()-1);
 		std::swap(m_real_terminal.begin()[i], m_real_terminal.begin()[j]);
diff --git a/sources/machine_info.cpp b/sources/machine_info.cpp
index 58283d53a..6e8eeeca5 100644
--- a/sources/machine_info.cpp
+++ b/sources/machine_info.cpp
@@ -188,10 +188,8 @@ void MachineInfo::send_info_to_debug()
 	QDirIterator it1(QETApp::commonElementsDir().toLatin1(),nameFilters,  QDir::Files, QDirIterator::Subdirectories);
 			while (it1.hasNext())
 			{
-				if(it1.next() > 0 )
-				{
+				it1.next();
 				commomElementsDir ++;
-				}
 			}
 	qInfo()<< " Common Elements count:"<< commomElementsDir << "Elements";
 	
@@ -200,10 +198,8 @@ void MachineInfo::send_info_to_debug()
 	QDirIterator it2(QETApp::customElementsDir().toLatin1(), nameFilters, QDir::Files, QDirIterator::Subdirectories);
 			while (it2.hasNext())
 			{
-				if(it2.next() > 0 )
-				{
+				it2.next();
 				customElementsDir ++;
-				}
 			}
 	qInfo()<< " Custom Elements count:"<< customElementsDir << "Elements";
 	
@@ -211,10 +207,8 @@ void MachineInfo::send_info_to_debug()
 	QDirIterator it3(QETApp::companyElementsDir().toLatin1(), nameFilters, QDir::Files, QDirIterator::Subdirectories);
 			while (it3.hasNext())
 			{
-				if(it3.next() > 0 )
-				{
+				it3.next();
 				companyElementsDir ++;
-				}
 			}
 	qInfo()<< " Company Elements count:"<< companyElementsDir << "Elements";
 	
diff --git a/sources/qetxml.h b/sources/qetxml.h
index f119fa3a4..cdc5ae394 100644
--- a/sources/qetxml.h
+++ b/sources/qetxml.h
@@ -20,6 +20,7 @@
 
 #include <QDomElement>
 #include <QPen>
+#include <QUuid>
 
 class QDomDocument;
 class QDir;
diff --git a/sources/qgimanager.cpp b/sources/qgimanager.cpp
index 5f92596d2..f6eedefb6 100644
--- a/sources/qgimanager.cpp
+++ b/sources/qgimanager.cpp
@@ -70,25 +70,6 @@ void QGIManager::release(QGraphicsItem *qgi) {
 	}
 }
 
-/**
-	Demande au QGIManager de gerer plusieurs QGI
-	@param qgis QGraphicsItems a gerer
-*/
-void QGIManager::manage(const QList<QGraphicsItem *> &qgis) {
-	foreach(QGraphicsItem *qgi, qgis) manage(qgi);
-}
-
-/**
-	Indique au QGIManager que pour chaque QGI fourni, une reference vers celui-ci
-	a ete detruite.
-	S'il n'y a plus de references vers un QGI et que celui-ci n'est pas present
-	sur la scene de ce QGIManager, alors il sera detruit.
-	@param qgis QGraphicsItems a ne plus gerer
-*/
-void QGIManager::release(const QList<QGraphicsItem *> &qgis) {
-	foreach(QGraphicsItem *qgi, qgis) release(qgi);
-}
-
 void QGIManager::manage(const QVector<QGraphicsItem *> &items) {
 	for (const auto &qgi : items) {
 		manage(qgi);
diff --git a/sources/qgimanager.h b/sources/qgimanager.h
index d8605a225..f6af9c480 100644
--- a/sources/qgimanager.h
+++ b/sources/qgimanager.h
@@ -45,10 +45,6 @@ class QGIManager {
 	public:
 	void manage(QGraphicsItem *);
 	void release(QGraphicsItem *);
-	QT_DEPRECATED_X("Use QGIManager::manage(const QVector<QGraphicsItem *> &) instead")
-		void manage(const QList<QGraphicsItem *> &);
-	QT_DEPRECATED_X("Use QGIManager::release(const QVector<QGraphicsItem *> &) instead")
-		void release(const QList<QGraphicsItem *> &);
 	void manage(const QVector<QGraphicsItem *> &items);
 	void release(const QVector<QGraphicsItem *> &items);
 	void setDestroyQGIOnDelete(bool);
diff --git a/sources/titleblock/templatescollection.cpp b/sources/titleblock/templatescollection.cpp
index 216ef8db7..dc8814a4f 100644
--- a/sources/titleblock/templatescollection.cpp
+++ b/sources/titleblock/templatescollection.cpp
@@ -454,7 +454,7 @@ QDomElement TitleBlockTemplatesFilesCollection::getTemplateXmlDescription(const
 	}
 
 	QDomDocument *xml_document = new QDomDocument();
-	bool xml_parsing = xml_document -> setContent(&xml_file);
+	const auto xml_parsing = xml_document -> setContent(&xml_file);
 	if (!xml_parsing) {
 		delete xml_document;
 		return(QDomElement());
diff --git a/sources/titleblock/templateview.h b/sources/titleblock/templateview.h
index 417b8e8d5..97c82eae9 100644
--- a/sources/titleblock/templateview.h
+++ b/sources/titleblock/templateview.h
@@ -24,6 +24,8 @@ class HelperCell;
 class SplittedHelperCell;
 class TitleBlockTemplateCommand;
 class TitleBlockTemplateCellsSet;
+class QGraphicsLayoutItem;
+class QGraphicsGridLayout;
 
 /**
 	This QGraphicsView subclass is used in the title block template editor to
diff --git a/sources/titleblocktemplate.cpp b/sources/titleblocktemplate.cpp
index 351a34469..122705d3f 100644
--- a/sources/titleblocktemplate.cpp
+++ b/sources/titleblocktemplate.cpp
@@ -103,7 +103,7 @@ bool TitleBlockTemplate::loadFromXmlFile(const QString &filepath) {
 
 	// parse its content as XML
 	QDomDocument xml_doc;
-	bool xml_parsing = xml_doc.setContent(&template_file);
+	const auto xml_parsing = xml_doc.setContent(&template_file);
 	if (!xml_parsing) {
 		return(false);
 	}