Launcher: Qt6 support. Qt 5.12 required (#746)

* Launcher: Qt6 support. Qt 5.12 required

CMakeLists.txt

@@ -249,7 +249,8 @@ find_package(TBB REQUIRED)
 
 if(ENABLE_LAUNCHER)
 	# Widgets finds its own dependencies (QtGui and QtCore).
-	find_package(Qt5 COMPONENTS Widgets Network REQUIRED)
+	find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets Network)
+	find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets Network)
 endif()
 
 if(ENABLE_LUA)
@@ -389,7 +390,7 @@ if(WIN32)
 	endif()
 
 	if(ENABLE_LAUNCHER)
-		get_target_property(QtCore_location Qt5::Core LOCATION)
+		get_target_property(QtCore_location Qt${QT_VERSION_MAJOR}::Core LOCATION)
 		get_filename_component(Qtbin_folder ${QtCore_location} PATH)
 		file(GLOB dep_files
 			${dep_files}
@@ -398,9 +399,9 @@ if(WIN32)
 			${Qtbin_folder}/Qt5Widgets${debug_postfix}.dll
 			${Qtbin_folder}/Qt5Network${debug_postfix}.dll
 			${Qtbin_folder}/icu*.dll)
-		get_target_property(integration_type Qt5::QWindowsIntegrationPlugin TYPE)
+		get_target_property(integration_type Qt${QT_VERSION_MAJOR}::QWindowsIntegrationPlugin TYPE)
 		if(NOT(integration_type STREQUAL "INTERFACE_LIBRARY"))
-			get_target_property(integration_loc Qt5::QWindowsIntegrationPlugin LOCATION)
+			get_target_property(integration_loc Qt${QT_VERSION_MAJOR}::QWindowsIntegrationPlugin LOCATION)
 			install(
 				FILES ${integration_loc}
 				DESTINATION ${BIN_DIR}/platforms

launcher/CMakeLists.txt

@@ -63,14 +63,12 @@ endif()
 # to always look for includes there:
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
-if("${CMAKE_VERSION}" VERSION_LESS 2.8.12)
-	# Executables fail to build with Qt 5 in the default configuration
-	# without -fPIE. We add that here.
-	set(CMAKE_CXX_FLAGS "${Qt5Widgets_EXECUTABLE_COMPILE_FLAGS} ${CMAKE_CXX_FLAGS}")
+if(TARGET Qt6::Core)
+	qt_wrap_ui(launcher_UI_HEADERS ${launcher_FORMS})
+else()
+	qt5_wrap_ui(launcher_UI_HEADERS ${launcher_FORMS})
 endif()
 
-qt5_wrap_ui(launcher_UI_HEADERS ${launcher_FORMS})
-
 if(WIN32)
 	set(launcher_ICON VCMI_launcher.rc)
 endif()
@@ -90,7 +88,7 @@ if(WIN32)
 	# - cmake_policy in all possible places
 	# - used NO_POLICY_SCOPE to make sure no other parts reset policies
 	# Still nothing worked, warning kept appearing and WinMain didn't link automatically
-	target_link_libraries(vcmilauncher Qt5::WinMain)
+	target_link_libraries(vcmilauncher Qt${QT_VERSION_MAJOR}::WinMain)
 endif()
 
 if(APPLE)
@@ -98,7 +96,7 @@ if(APPLE)
 	set_property(GLOBAL PROPERTY AUTOGEN_TARGETS_FOLDER vcmilauncher)
 endif()
 
-target_link_libraries(vcmilauncher vcmi Qt5::Widgets Qt5::Network)
+target_link_libraries(vcmilauncher vcmi Qt${QT_VERSION_MAJOR}::Widgets Qt${QT_VERSION_MAJOR}::Network)
 target_include_directories(vcmilauncher
 	PUBLIC	${CMAKE_CURRENT_SOURCE_DIR}
 )

launcher/jsonutils.cpp

@@ -106,9 +106,9 @@ JsonNode toJson(QVariant object)
 		ret.Struct() = VariantToMap(object.toMap());
 	else if(object.canConvert<QVariantList>())
 		ret.Vector() = VariantToList(object.toList());
-	else if(static_cast<QMetaType::Type>(object.type()) == QMetaType::QString)
+	else if(object.userType() == QMetaType::QString)
 		ret.String() = object.toString().toUtf8().data();
-	else if(static_cast<QMetaType::Type>(object.type()) == QMetaType::Bool)
+	else if(object.userType() == QMetaType::Bool)
 		ret.Bool() = object.toBool();
 	else if(object.canConvert<double>())
 		ret.Float() = object.toFloat();

launcher/mainwindow_moc.cpp

@@ -102,7 +102,7 @@ void MainWindow::startExecutable(QString name)
 	QProcess process;
 
 	// Start the executable
-	if(process.startDetached(name))
+	if(process.startDetached(name, {}))
 	{
 		close(); // exit launcher
 	}

launcher/modManager/cmodlistmodel_moc.cpp

@@ -253,7 +253,7 @@ bool CModFilterModel::filterAcceptsRow(int source_row, const QModelIndex & sourc
 
 	for(size_t i = 0; i < base->rowCount(index); i++)
 	{
-		if(filterMatchesThis(index.child((int)i, 0)))
+		if(filterMatchesThis(base->index((int)i, 0, index)))
 			return true;
 	}
 

launcher/modManager/cmodlistview_moc.cpp

@@ -15,6 +15,7 @@
 
 #include <QJsonArray>
 #include <QCryptographicHash>
+#include <QRegularExpression>
 
 #include "cmodlistmodel_moc.h"
 #include "cmodmanager.h"
@@ -352,8 +353,16 @@ void CModListView::on_allModsView_activated(const QModelIndex & index)
 
 void CModListView::on_lineEdit_textChanged(const QString & arg1)
 {
-	QRegExp regExp(arg1, Qt::CaseInsensitive, QRegExp::Wildcard);
-	filterModel->setFilterRegExp(regExp);
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+	auto baseStr = QRegularExpression::wildcardToRegularExpression(arg1, QRegularExpression::UnanchoredWildcardConversion);
+#else
+	auto baseStr = QRegularExpression::wildcardToRegularExpression(arg1);
+	//Hack due to lack QRegularExpression::UnanchoredWildcardConversion in Qt5
+	baseStr.chop(3);
+	baseStr.remove(0,5);
+#endif
+	QRegularExpression regExp{baseStr, QRegularExpression::CaseInsensitiveOption};
+	filterModel->setFilterRegularExpression(regExp);
 }
 
 void CModListView::on_comboBox_currentIndexChanged(int index)

launcher/modManager/imageviewer_moc.cpp

@@ -9,7 +9,7 @@
  */
 #include "StdInc.h"
 
-#include <QDesktopWidget>
+#include <QGuiApplication>
 
 #include "imageviewer_moc.h"
 #include "ui_imageviewer_moc.h"
@@ -27,8 +27,7 @@ ImageViewer::~ImageViewer()
 
 QSize ImageViewer::calculateWindowSize()
 {
-	QDesktopWidget desktop;
-	return desktop.availableGeometry(desktop.primaryScreen()).size() * 0.8;
+	return QGuiApplication::primaryScreen()->availableGeometry().size() * 0.8;
 }
 
 void ImageViewer::showPixmap(QPixmap & pixmap, QWidget * parent)

launcher/settingsView/csettingsview_moc.cpp

@@ -12,6 +12,7 @@
 #include "ui_csettingsview_moc.h"
 
 #include <QFileInfo>
+#include <QGuiApplication>
 
 #include "../../lib/CConfigHandler.h"
 #include "../../lib/VCMIDirs.h"
@@ -34,12 +35,12 @@ static const std::string knownEncodingsList[] = //TODO: remove hardcode
 void CSettingsView::setDisplayList()
 {
 	QStringList list;
-	QDesktopWidget * widget = QApplication::desktop();
-	for(int display = 0; display < widget->screenCount(); display++)
+
+	for (const auto screen : QGuiApplication::screens())
 	{
 		QString string;
-		auto rect = widget->screenGeometry(display);
-		QTextStream(&string) << display << " - " << rect.width() << "x" << rect.height();
+		const auto & rect = screen->geometry();
+		QTextStream(&string) << screen->name() << " - " << rect.width() << "x" << rect.height();
 		list << string;
 	}