#5480: Drop Qt4 support and require Qt 5.12 or later.

.gitlab-ci.yml

@@ -13,7 +13,7 @@ Debian:
   before_script:
     - export APT_CACHE_DIR=`pwd`/apt-cache && mkdir -pv $APT_CACHE_DIR
     - apt-get update -yq 
-    - apt-get -o dir::cache::archives="$APT_CACHE_DIR" install -y cmake libboost-filesystem-dev libboost-program-options-dev libboost-system-dev libboost-iostreams-dev libavcodec-dev libavformat-dev libavutil-dev libswscale-dev libswresample-dev libsdl2-dev libqt4-dev libopenal-dev libopenscenegraph-3.4-dev libunshield-dev libtinyxml-dev libmygui-dev libbullet-dev
+    - apt-get -o dir::cache::archives="$APT_CACHE_DIR" install -y cmake libboost-filesystem-dev libboost-program-options-dev libboost-system-dev libboost-iostreams-dev libavcodec-dev libavformat-dev libavutil-dev libswscale-dev libswresample-dev libsdl2-dev libqt5opengl5-dev libopenal-dev libopenscenegraph-3.4-dev libunshield-dev libtinyxml-dev libmygui-dev libbullet-dev
   stage: build
   script: 
     - cores_to_use=$((`nproc`-2)); if (( $cores_to_use < 1 )); then cores_to_use=1; fi

CHANGELOG.md

@@ -31,6 +31,7 @@
     Feature #5297: Add a search function to the "Datafiles" tab of the OpenMW launcher
     Feature #5362: Show the soul gems' trapped soul in count dialog
     Feature #5445: Handle NiLines
+    Task #5480: Drop Qt4 support
 
 0.46.0
 ------

CI/before_script.linux.sh

@@ -27,7 +27,6 @@ ${ANALYZE} cmake \
     -DBUILD_NIFTEST=${BUILD_OPENMW_CS} \
     -DBUILD_UNITTESTS=1 \
     -DUSE_SYSTEM_TINYXML=1 \
-    -DDESIRED_QT_VERSION=5 \
     -DCMAKE_INSTALL_PREFIX=/usr \
     -DBINDIR=/usr/games \
     -DCMAKE_BUILD_TYPE="None" \

CI/before_script.msvc.sh

@@ -776,8 +776,7 @@ fi
 		fi
 
 		cd $QT_SDK
-		add_cmake_opts -DDESIRED_QT_VERSION=5 \
-			-DQT_QMAKE_EXECUTABLE="${QT_SDK}/bin/qmake.exe" \
+		add_cmake_opts -DQT_QMAKE_EXECUTABLE="${QT_SDK}/bin/qmake.exe" \
 			-DCMAKE_PREFIX_PATH="$QT_SDK"
 		if [ $CONFIGURATION == "Debug" ]; then
 			SUFFIX="d"
@@ -789,8 +788,7 @@ fi
 		echo Done.
 	else
 		QT_SDK="C:/Qt/5.13/msvc2017${SUFFIX}"
-		add_cmake_opts -DDESIRED_QT_VERSION=5 \
-			-DQT_QMAKE_EXECUTABLE="${QT_SDK}/bin/qmake.exe" \
+		add_cmake_opts -DQT_QMAKE_EXECUTABLE="${QT_SDK}/bin/qmake.exe" \
 			-DCMAKE_PREFIX_PATH="$QT_SDK"
 		if [ $CONFIGURATION == "Debug" ]; then
 			SUFFIX="d"

CI/before_script.osx.sh

@@ -17,7 +17,6 @@ cmake \
 -D CMAKE_OSX_SYSROOT="macosx10.14" \
 -D CMAKE_BUILD_TYPE=Release \
 -D OPENMW_OSX_DEPLOYMENT=TRUE \
--D DESIRED_QT_VERSION=5 \
 -D BUILD_ESMTOOL=FALSE \
 -G"Unix Makefiles" \
 ..

CMakeLists.txt

@@ -19,11 +19,6 @@ else()
    set(USE_QT TRUE)
 endif()
 
-if (USE_QT)
-    set(DESIRED_QT_VERSION 4 CACHE STRING "The QT version OpenMW should use (4 or 5)")
-    set_property(CACHE DESIRED_QT_VERSION PROPERTY STRINGS 4 5)
-endif()
-
 # set the minimum required version across the board
 cmake_minimum_required(VERSION 3.1.0)
 
@@ -153,18 +148,12 @@ endif()
 find_package(OpenGL REQUIRED)
 
 if (USE_QT)
-    message(STATUS "Using Qt${DESIRED_QT_VERSION}")
-
-    if (DESIRED_QT_VERSION MATCHES 4)
-        find_package(Qt4 REQUIRED COMPONENTS QtCore QtGui QtNetwork QtOpenGL)
-    else()
-        find_package(Qt5Widgets REQUIRED)
-        find_package(Qt5Core REQUIRED)
-        find_package(Qt5Network REQUIRED)
-        find_package(Qt5OpenGL REQUIRED)
+    find_package(Qt5Core 5.12 REQUIRED)
+    find_package(Qt5Widgets REQUIRED)
+    find_package(Qt5Network REQUIRED)
+    find_package(Qt5OpenGL REQUIRED)
     # Instruct CMake to run moc automatically when needed.
     #set(CMAKE_AUTOMOC ON)
-    endif()
 endif()
 
 # Sound setup
@@ -291,17 +280,6 @@ if(OSG_STATIC)
     list(APPEND OPENSCENEGRAPH_LIBRARIES ${OSGPlugins_LIBRARIES})
 endif()
 
-if(QT_STATIC)
-   if(WIN32)
-      if(DESIRED_QT_VERSION MATCHES 4)
-         # QtCore needs WSAAsyncSelect from Ws2_32.lib
-         set(QT_QTCORE_LIBRARY ${QT_QTCORE_LIBRARY} Ws2_32.lib)
-         message("QT_QTCORE_LIBRARY: ${QT_QTCORE_LIBRARY}")
-      endif()
-   endif()
-endif()
-
-
 set(BOOST_COMPONENTS system filesystem program_options iostreams)
 if(WIN32)
     set(BOOST_COMPONENTS ${BOOST_COMPONENTS} locale)
@@ -517,11 +495,6 @@ if(WIN32)
     INSTALL(FILES "${OpenMW_BINARY_DIR}/Debug/gamecontrollerdb.txt" DESTINATION "." CONFIGURATIONS Debug)
     INSTALL(FILES "${OpenMW_BINARY_DIR}/Release/gamecontrollerdb.txt" DESTINATION "." CONFIGURATIONS Release;RelWithDebInfo;MinSizeRel)
 
-    IF(DESIRED_QT_VERSION MATCHES 5)
-        INSTALL(DIRECTORY "${OpenMW_BINARY_DIR}/Debug/platforms" DESTINATION "." CONFIGURATIONS Debug)
-        INSTALL(DIRECTORY "${OpenMW_BINARY_DIR}/Release/platforms" DESTINATION "." CONFIGURATIONS Release;RelWithDebInfo;MinSizeRel)
-    ENDIF()
-
     INSTALL(DIRECTORY "${OpenMW_BINARY_DIR}/Debug/resources" DESTINATION "." CONFIGURATIONS Debug)
     INSTALL(DIRECTORY "${OpenMW_BINARY_DIR}/Release/resources" DESTINATION "." CONFIGURATIONS Release;RelWithDebInfo;MinSizeRel)
 
@@ -785,7 +758,7 @@ if (WIN32)
 endif()
 
 # Apple bundling
-if (OPENMW_OSX_DEPLOYMENT AND APPLE AND DESIRED_QT_VERSION MATCHES 5)
+if (OPENMW_OSX_DEPLOYMENT AND APPLE)
     if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.13 AND CMAKE_VERSION VERSION_LESS 3.13.4)
         message(FATAL_ERROR "macOS packaging is broken in early CMake 3.13 releases, see https://gitlab.com/OpenMW/openmw/issues/4767. Please use at least 3.13.4 or an older version like 3.12.4")
     endif ()

apps/launcher/CMakeLists.txt

@@ -70,16 +70,9 @@ if(WIN32)
     set(QT_USE_QTMAIN TRUE)
 endif(WIN32)
 
-if (DESIRED_QT_VERSION MATCHES 4)
-    include(${QT_USE_FILE})
-    QT4_ADD_RESOURCES(RCC_SRCS ${CMAKE_SOURCE_DIR}/files/launcher/launcher.qrc)
-    QT4_WRAP_CPP(MOC_SRCS ${LAUNCHER_HEADER_MOC})
-    QT4_WRAP_UI(UI_HDRS ${LAUNCHER_UI})
-else()
-    QT5_ADD_RESOURCES(RCC_SRCS ${CMAKE_SOURCE_DIR}/files/launcher/launcher.qrc)
-    QT5_WRAP_CPP(MOC_SRCS ${LAUNCHER_HEADER_MOC})
-    QT5_WRAP_UI(UI_HDRS ${LAUNCHER_UI})
-endif()
+QT5_ADD_RESOURCES(RCC_SRCS ${CMAKE_SOURCE_DIR}/files/launcher/launcher.qrc)
+QT5_WRAP_CPP(MOC_SRCS ${LAUNCHER_HEADER_MOC})
+QT5_WRAP_UI(UI_HDRS ${LAUNCHER_UI})
 
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 if(NOT WIN32)
@@ -105,14 +98,7 @@ target_link_libraries(openmw-launcher
     components
 )
 
-if (DESIRED_QT_VERSION MATCHES 4)
-    target_link_libraries(openmw-launcher ${QT_QTGUI_LIBRARY} ${QT_QTCORE_LIBRARY})
-    if(WIN32)
-        target_link_libraries(openmw-launcher ${QT_QTMAIN_LIBRARY})
-    endif(WIN32)
-else()
-    target_link_libraries(openmw-launcher Qt5::Widgets Qt5::Core)
-endif()
+target_link_libraries(openmw-launcher Qt5::Widgets Qt5::Core)
 
 if (BUILD_WITH_CODE_COVERAGE)
   add_definitions (--coverage)

apps/launcher/graphicspage.cpp

@@ -3,10 +3,7 @@
 #include <QDesktopWidget>
 #include <QMessageBox>
 #include <QDir>
-
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
 #include <QScreen>
-#endif
 
 #ifdef MAC_OS_X_VERSION_MIN_REQUIRED
 #undef MAC_OS_X_VERSION_MIN_REQUIRED
@@ -54,13 +51,11 @@ Launcher::GraphicsPage::GraphicsPage(Files::ConfigurationManager &cfg, Settings:
 
 bool Launcher::GraphicsPage::setupSDL()
 {
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     bool sdlConnectSuccessful = initSDL();
     if (!sdlConnectSuccessful)
     {
         return false;
     }
-#endif
 
     int displays = SDL_GetNumVideoDisplays();
 
@@ -81,10 +76,8 @@ bool Launcher::GraphicsPage::setupSDL()
         screenComboBox->addItem(QString(tr("Screen ")) + QString::number(i + 1));
     }
 
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     // Disconnect from SDL processes
     quitSDL();
-#endif
 
     return true;
 }
@@ -323,7 +316,6 @@ QRect Launcher::GraphicsPage::getMaximumResolution()
 {
     QRect max;
 
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     for (QScreen* screen : QGuiApplication::screens())
     {
         QRect res = screen->geometry();
@@ -332,17 +324,6 @@ QRect Launcher::GraphicsPage::getMaximumResolution()
         if (res.height() > max.height())
             max.setHeight(res.height());
     }
-#else
-    int screens = QApplication::desktop()->screenCount();
-    for (int i = 0; i < screens; ++i)
-    {
-        QRect res = QApplication::desktop()->screenGeometry(i);
-        if (res.width() > max.width())
-            max.setWidth(res.width());
-        if (res.height() > max.height())
-            max.setHeight(res.height());
-    }
-#endif
     return max;
 }
 

apps/launcher/main.cpp

@@ -13,18 +13,11 @@
 #endif // MAC_OS_X_VERSION_MIN_REQUIRED
 
 #include "maindialog.hpp"
-#include "sdlinit.hpp"
 
 int main(int argc, char *argv[])
 {
     try
     {
-// Note: we should init SDL2 before Qt4 to avoid crashes on Linux,
-// but we should init SDL2 after Qt5 to avoid input issues on MacOS X.
-#if QT_VERSION < QT_VERSION_CHECK(5,0,0)
-        initSDL();
-#endif
-
         QApplication app(argc, argv);
 
         // Internationalization 
@@ -50,11 +43,6 @@ int main(int argc, char *argv[])
 
         int exitCode = app.exec();
 
-#if QT_VERSION < QT_VERSION_CHECK(5,0,0)
-        // Disconnect from SDL processes
-        quitSDL();
-#endif
-
         return exitCode;
     }
     catch (std::exception& e)

apps/opencs/CMakeLists.txt

@@ -149,16 +149,9 @@ if(WIN32)
     set(QT_USE_QTMAIN TRUE)
 endif(WIN32)
 
-if (DESIRED_QT_VERSION MATCHES 4)
-    include(${QT_USE_FILE})
-    qt4_wrap_ui(OPENCS_UI_HDR ${OPENCS_UI})
-    qt4_wrap_cpp(OPENCS_MOC_SRC ${OPENCS_HDR_QT})
-    qt4_add_resources(OPENCS_RES_SRC ${OPENCS_RES})
-else()
-    qt5_wrap_ui(OPENCS_UI_HDR ${OPENCS_UI})
-    qt5_wrap_cpp(OPENCS_MOC_SRC ${OPENCS_HDR_QT})
-    qt5_add_resources(OPENCS_RES_SRC ${OPENCS_RES})
-endif()
+qt5_wrap_ui(OPENCS_UI_HDR ${OPENCS_UI})
+qt5_wrap_cpp(OPENCS_MOC_SRC ${OPENCS_HDR_QT})
+qt5_add_resources(OPENCS_RES_SRC ${OPENCS_RES})
 
 # for compiled .ui files
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
@@ -236,19 +229,7 @@ target_link_libraries(openmw-cs
     components
 )
 
-if (DESIRED_QT_VERSION MATCHES 4)
-    target_link_libraries(openmw-cs
-    ${QT_QTGUI_LIBRARY}
-    ${QT_QTCORE_LIBRARY}
-    ${QT_QTNETWORK_LIBRARY}
-    ${QT_QTOPENGL_LIBRARY})
-
-    if (WIN32)
-        target_link_libraries(openmw-cs ${QT_QTMAIN_LIBRARY})
-    endif()
-else()
-    target_link_libraries(openmw-cs Qt5::Widgets Qt5::Core Qt5::Network Qt5::OpenGL)
-endif()
+target_link_libraries(openmw-cs Qt5::Widgets Qt5::Core Qt5::Network Qt5::OpenGL)
 
 if (WIN32)
     target_link_libraries(openmw-cs ${Boost_LOCALE_LIBRARY})

apps/opencs/model/prefs/shortcutmanager.cpp

@@ -685,7 +685,6 @@ namespace CSMPrefs
         std::make_pair((int)Qt::Key_ContrastAdjust         , "ContrastAdjust"),
         std::make_pair((int)Qt::Key_LaunchG                , "LaunchG"),
         std::make_pair((int)Qt::Key_LaunchH                , "LaunchH"),
-#if QT_VERSION >= QT_VERSION_CHECK(5,7,0)
         std::make_pair((int)Qt::Key_TouchpadToggle         , "TouchpadToggle"),
         std::make_pair((int)Qt::Key_TouchpadOn             , "TouchpadOn"),
         std::make_pair((int)Qt::Key_TouchpadOff            , "TouchpadOff"),
@@ -706,7 +705,6 @@ namespace CSMPrefs
         std::make_pair((int)Qt::Key_Find                   , "Find"),
         std::make_pair((int)Qt::Key_Undo                   , "Undo"),
         std::make_pair((int)Qt::Key_Redo                   , "Redo"),
-#endif
         std::make_pair((int)Qt::Key_AltGr                  , "AltGr"),
         std::make_pair((int)Qt::Key_Multi_key              , "Multi_key"),
         std::make_pair((int)Qt::Key_Kanji                  , "Kanji"),
@@ -770,9 +768,7 @@ namespace CSMPrefs
         std::make_pair((int)Qt::Key_Sleep                  , "Sleep"),
         std::make_pair((int)Qt::Key_Play                   , "Play"),
         std::make_pair((int)Qt::Key_Zoom                   , "Zoom"),
-#if QT_VERSION >= QT_VERSION_CHECK(5,7,0)
         std::make_pair((int)Qt::Key_Exit                   , "Exit"),
-#endif
         std::make_pair((int)Qt::Key_Context1               , "Context1"),
         std::make_pair((int)Qt::Key_Context2               , "Context2"),
         std::make_pair((int)Qt::Key_Context3               , "Context3"),

apps/opencs/view/doc/newgame.cpp

@@ -5,10 +5,7 @@
 #include <QVBoxLayout>
 #include <QDialogButtonBox>
 #include <QPushButton>
-
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
 #include <QScreen>
-#endif
 
 #include "filewidget.hpp"
 #include "adjusterwidget.hpp"
@@ -50,11 +47,7 @@ CSVDoc::NewGameDialogue::NewGameDialogue()
     connect (mFileWidget, SIGNAL (nameChanged (const QString&, bool)),
         mAdjusterWidget, SLOT (setName (const QString&, bool)));
 
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     QRect scr = QGuiApplication::primaryScreen()->geometry();
-#else
-    QRect scr = QApplication::desktop()->screenGeometry();
-#endif
     QRect rect = geometry();
     move (scr.center().x() - rect.center().x(), scr.center().y() - rect.center().y());
 }

apps/opencs/view/doc/startup.cpp

@@ -9,10 +9,7 @@
 #include <QLabel>
 #include <QIcon>
 #include <QPushButton>
-
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
 #include <QScreen>
-#endif
 
 QPushButton *CSVDoc::StartupDialogue::addButton (const QString& label, const QIcon& icon)
 {
@@ -123,12 +120,7 @@ CSVDoc::StartupDialogue::StartupDialogue() : mWidth (0), mColumn (2)
 
     setLayout (layout);
 
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     QRect scr = QGuiApplication::primaryScreen()->geometry();
-#else
-    QRect scr = QApplication::desktop()->screenGeometry();
-#endif
-
     QRect rect = geometry();
     move (scr.center().x() - rect.center().x(), scr.center().y() - rect.center().y());
 }

apps/opencs/view/doc/view.cpp

@@ -14,10 +14,7 @@
 #include <QHBoxLayout>
 #include <QDesktopWidget>
 #include <QScrollBar>
-
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
 #include <QScreen>
-#endif
 
 #include "../../model/doc/document.hpp"
 #include "../../model/prefs/state.hpp"
@@ -1071,11 +1068,7 @@ void CSVDoc::View::updateWidth(bool isGrowLimit, int minSubViewWidth)
     if (isGrowLimit)
         rect = dw->screenGeometry(this);
     else
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
         rect = QGuiApplication::screens().at(dw->screenNumber(this))->geometry();
-#else
-        rect = dw->screenGeometry(dw->screen(dw->screenNumber(this)));
-#endif
 
     if (!mScrollbarOnly && mScroll && mSubViews.size() > 1)
     {

apps/opencs/view/prefs/dialogue.cpp

@@ -1,4 +1,3 @@
-
 #include "dialogue.hpp"
 
 #include <QApplication>
@@ -7,10 +6,7 @@
 #include <QListWidget>
 #include <QStackedWidget>
 #include <QListWidgetItem>
-
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
 #include <QScreen>
-#endif
 
 #include <components/debug/debuglog.hpp>
 
@@ -39,11 +35,7 @@ void CSVPrefs::Dialogue::buildCategorySelector (QSplitter *main)
     {
         QString label = QString::fromUtf8 (iter->second.getKey().c_str());
 
-#if QT_VERSION >= QT_VERSION_CHECK(5,11,0)
         maxWidth = std::max (maxWidth, metrics.horizontalAdvance (label));
-#else
-        maxWidth = std::max (maxWidth, metrics.width (label));
-#endif
 
         list->addItem (label);
     }
@@ -116,11 +108,7 @@ void CSVPrefs::Dialogue::show()
     }
     else
     {
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
         QRect scr = QGuiApplication::primaryScreen()->geometry();
-#else
-        QRect scr = QApplication::desktop()->screenGeometry();
-#endif
 
         // otherwise place at the centre of the screen
         QPoint screenCenter = scr.center();

apps/opencs/view/render/scenewidget.cpp

@@ -143,14 +143,9 @@ void RenderWidget::toggleRenderStats()
 CompositeViewer::CompositeViewer()
     : mSimulationTime(0.0)
 {
-#if QT_VERSION >= 0x050000
-    // Qt5 is currently crashing and reporting "Cannot make QOpenGLContext current in a different thread" when the viewer is run multi-threaded, this is regression from Qt4
-    osgViewer::ViewerBase::ThreadingModel threadingModel = osgViewer::ViewerBase::SingleThreaded;
-#else
-    osgViewer::ViewerBase::ThreadingModel threadingModel = osgViewer::ViewerBase::DrawThreadPerContext;
-#endif
-
-    setThreadingModel(threadingModel);
+    // TODO: Upgrade osgQt to support osgViewer::ViewerBase::DrawThreadPerContext
+    // https://gitlab.com/OpenMW/openmw/-/issues/5481
+    setThreadingModel(osgViewer::ViewerBase::SingleThreaded);
 
 #if OSG_VERSION_GREATER_OR_EQUAL(3,5,5)
     setUseConfigureAffinity(false);

apps/opencs/view/render/worldspacewidget.cpp

@@ -646,13 +646,8 @@ void CSVRender::WorldspaceWidget::mouseMoveEvent (QMouseEvent *event)
 
         if (mDragging)
         {
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
             mDragX = event->localPos().x();
             mDragY = height() - event->localPos().y();
-#else
-            mDragX = event->posF().x();
-            mDragY = height() - event->posF().y();
-#endif
         }
     }
     else

apps/opencs/view/tools/reporttable.cpp

@@ -144,11 +144,7 @@ CSVTools::ReportTable::ReportTable (CSMDoc::Document& document,
 : CSVWorld::DragRecordTable (document, parent), mModel (document.getReport (id)),
   mRefreshAction (0), mRefreshState (refreshState)
 {
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     horizontalHeader()->setSectionResizeMode (QHeaderView::Interactive);
-#else
-    horizontalHeader()->setResizeMode (QHeaderView::Interactive);
-#endif
     horizontalHeader()->setStretchLastSection (true);
     verticalHeader()->hide();
     setSortingEnabled (true);

apps/opencs/view/widget/coloreditor.cpp

@@ -5,10 +5,7 @@
 #include <QDesktopWidget>
 #include <QPainter>
 #include <QShowEvent>
-
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
 #include <QScreen>
-#endif
 
 #include "colorpickerpopup.hpp"
 
@@ -99,11 +96,7 @@ QPoint CSVWidget::ColorEditor::calculatePopupPosition()
 {
     QRect editorGeometry = geometry();
     QRect popupGeometry = mColorPicker->geometry();
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     QRect screenGeometry = QGuiApplication::primaryScreen()->geometry();
-#else
-    QRect screenGeometry = QApplication::desktop()->screenGeometry();
-#endif
 
     // Center the popup horizontally relative to the editor
     int localPopupX = (editorGeometry.width() - popupGeometry.width()) / 2;

apps/opencs/view/widget/scenetoolrun.cpp

@@ -64,13 +64,8 @@ CSVWidget::SceneToolRun::SceneToolRun (SceneToolbar *parent, const QString& tool
     mTable->setShowGrid (false);
     mTable->verticalHeader()->hide();
     mTable->horizontalHeader()->hide();
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     mTable->horizontalHeader()->setSectionResizeMode (0, QHeaderView::Stretch);
     mTable->horizontalHeader()->setSectionResizeMode (1, QHeaderView::ResizeToContents);
-#else
-    mTable->horizontalHeader()->setResizeMode (0, QHeaderView::Stretch);
-    mTable->horizontalHeader()->setResizeMode (1, QHeaderView::ResizeToContents);
-#endif
     mTable->setSelectionMode (QAbstractItemView::NoSelection);
 
     layout->addWidget (mTable);

apps/opencs/view/widget/scenetoolshapebrush.cpp

@@ -180,13 +180,8 @@ CSVWidget::SceneToolShapeBrush::SceneToolShapeBrush (SceneToolbar *parent, const
     mTable->setShowGrid (true);
     mTable->verticalHeader()->hide();
     mTable->horizontalHeader()->hide();
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     mTable->horizontalHeader()->setSectionResizeMode (0, QHeaderView::Stretch);
     mTable->horizontalHeader()->setSectionResizeMode (1, QHeaderView::Stretch);
-#else
-    mTable->horizontalHeader()->setResizeMode (0, QHeaderView::Stretch);
-    mTable->horizontalHeader()->setResizeMode (1, QHeaderView::Stretch);
-#endif
     mTable->setSelectionMode (QAbstractItemView::NoSelection);
 
     layout->addWidget (mTable);

apps/opencs/view/widget/scenetooltexturebrush.cpp

@@ -243,13 +243,8 @@ CSVWidget::SceneToolTextureBrush::SceneToolTextureBrush (SceneToolbar *parent, c
     mTable->setShowGrid (true);
     mTable->verticalHeader()->hide();
     mTable->horizontalHeader()->hide();
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     mTable->horizontalHeader()->setSectionResizeMode (0, QHeaderView::Stretch);
     mTable->horizontalHeader()->setSectionResizeMode (1, QHeaderView::Stretch);
-#else
-    mTable->horizontalHeader()->setResizeMode (0, QHeaderView::Stretch);
-    mTable->horizontalHeader()->setResizeMode (1, QHeaderView::Stretch);
-#endif
     mTable->setSelectionMode (QAbstractItemView::NoSelection);
 
     layout->addWidget (mTable);

apps/opencs/view/world/enumdelegate.cpp

@@ -108,13 +108,8 @@ void CSVWorld::EnumDelegate::paint (QPainter *painter, const QStyleOptionViewIte
     const QModelIndex& index) const
 {
     int valueIndex = getValueIndex(index);
-    if (valueIndex != -1)
-    {
-#if QT_VERSION >= QT_VERSION_CHECK(5,7,0)
+    if (valueIndex != -
         QStyleOptionViewItem itemOption(option);
-#else
-        QStyleOptionViewItemV4 itemOption(option);
-#endif
         itemOption.text = mValues.at(valueIndex).second;
         QApplication::style()->drawControl(QStyle::CE_ItemViewItem, &itemOption, painter);
     }
@@ -134,13 +129,7 @@ QSize CSVWorld::EnumDelegate::sizeHint(const QStyleOptionViewItem &option, const
         itemOption.state = option.state;
 
         const QString &valueText = mValues.at(valueIndex).second;
-
-#if QT_VERSION >= QT_VERSION_CHECK(5,11,0)
         QSize valueSize = QSize(itemOption.fontMetrics.horizontalAdvance(valueText), itemOption.fontMetrics.height());
-#else
-        QSize valueSize = QSize(itemOption.fontMetrics.width(valueText), itemOption.fontMetrics.height());
-#endif
-
         itemOption.currentText = valueText;
         return QApplication::style()->sizeFromContents(QStyle::CT_ComboBox, &itemOption, valueSize);
     }

apps/opencs/view/world/nestedtable.cpp

@@ -33,11 +33,7 @@ CSVWorld::NestedTable::NestedTable(CSMDoc::Document& document,
     setSelectionBehavior (QAbstractItemView::SelectRows);
     setSelectionMode (QAbstractItemView::ExtendedSelection);
 
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     horizontalHeader()->setSectionResizeMode (QHeaderView::Interactive);
-#else
-    horizontalHeader()->setResizeMode (QHeaderView::Interactive);
-#endif
     verticalHeader()->hide();
 
     int columns = model->columnCount(QModelIndex());

apps/opencs/view/world/scriptedit.cpp

@@ -205,12 +205,7 @@ bool CSVWorld::ScriptEdit::stringNeedsQuote (const std::string& id) const
 void CSVWorld::ScriptEdit::setTabWidth()
 {
     // Set tab width to specified number of characters using current font.
-#if QT_VERSION >= QT_VERSION_CHECK(5,11,0)
     setTabStopDistance(mTabCharCount * fontMetrics().horizontalAdvance(' '));
-#else
-    setTabStopWidth(mTabCharCount * fontMetrics().width(' '));
-#endif
-
 }
 
 void CSVWorld::ScriptEdit::wrapLines(bool wrap)
@@ -290,12 +285,7 @@ int CSVWorld::ScriptEdit::lineNumberAreaWidth()
         ++digits;
     }
 
-#if QT_VERSION >= QT_VERSION_CHECK(5,11,0)
     int space = 3 + fontMetrics().horizontalAdvance(QLatin1Char('9')) * digits;
-#else
-    int space = 3 + fontMetrics().width(QLatin1Char('9')) * digits;
-#endif
-
     return space;
 }
 

apps/opencs/view/world/scripterrortable.cpp

@@ -83,13 +83,8 @@ CSVWorld::ScriptErrorTable::ScriptErrorTable (const CSMDoc::Document& document,
     QStringList headers;
     headers << "Severity" << "Line" << "Description";
     setHorizontalHeaderLabels (headers);
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     horizontalHeader()->setSectionResizeMode (0, QHeaderView::ResizeToContents);
     horizontalHeader()->setSectionResizeMode (1, QHeaderView::ResizeToContents);
-#else
-    horizontalHeader()->setResizeMode (0, QHeaderView::ResizeToContents);
-    horizontalHeader()->setResizeMode (1, QHeaderView::ResizeToContents);
-#endif
     horizontalHeader()->setStretchLastSection (true);
     verticalHeader()->hide();
     setColumnHidden (3, true);

apps/opencs/view/world/table.cpp

@@ -262,11 +262,7 @@ CSVWorld::Table::Table (const CSMWorld::UniversalId& id,
     mDispatcher = new CSMWorld::CommandDispatcher (document, id, this);
 
     setModel (mProxyModel);
-#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
     horizontalHeader()->setSectionResizeMode (QHeaderView::Interactive);
-#else
-    horizontalHeader()->setResizeMode (QHeaderView::Interactive);
-#endif
     verticalHeader()->hide();
     setSelectionBehavior (QAbstractItemView::SelectRows);
     setSelectionMode (QAbstractItemView::ExtendedSelection);

apps/wizard/CMakeLists.txt

@@ -79,16 +79,9 @@ if(WIN32)
     set(QT_USE_QTMAIN TRUE)
 endif(WIN32)
 
-if (DESIRED_QT_VERSION MATCHES 4)
-    include(${QT_USE_FILE})
-    QT4_ADD_RESOURCES(RCC_SRCS ${CMAKE_SOURCE_DIR}/files/wizard/wizard.qrc)
-    QT4_WRAP_CPP(MOC_SRCS ${WIZARD_HEADER_MOC})
-    QT4_WRAP_UI(UI_HDRS ${WIZARD_UI})
-else()
-    QT5_ADD_RESOURCES(RCC_SRCS ${CMAKE_SOURCE_DIR}/files/wizard/wizard.qrc)
-    QT5_WRAP_CPP(MOC_SRCS ${WIZARD_HEADER_MOC})
-    QT5_WRAP_UI(UI_HDRS ${WIZARD_UI})
-endif()
+QT5_ADD_RESOURCES(RCC_SRCS ${CMAKE_SOURCE_DIR}/files/wizard/wizard.qrc)
+QT5_WRAP_CPP(MOC_SRCS ${WIZARD_HEADER_MOC})
+QT5_WRAP_UI(UI_HDRS ${WIZARD_UI})
 
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
@@ -109,23 +102,12 @@ target_link_libraries(openmw-wizard
     components
 )
 
-if (DESIRED_QT_VERSION MATCHES 4)
-    target_link_libraries(openmw-wizard
-    ${QT_QTGUI_LIBRARY}
-    ${QT_QTCORE_LIBRARY})
-
-    if (WIN32)
-        target_link_libraries(openmw-wizard ${QT_QTMAIN_LIBRARY})
-    endif()
-else()
-    target_link_libraries(openmw-wizard Qt5::Widgets Qt5::Core)
-endif()
+target_link_libraries(openmw-wizard Qt5::Widgets Qt5::Core)
 
 if (OPENMW_USE_UNSHIELD)
     target_link_libraries(openmw-wizard ${LIBUNSHIELD_LIBRARIES})
 endif()
 
-
 if(DPKG_PROGRAM)
     INSTALL(TARGETS openmw-wizard RUNTIME DESTINATION games COMPONENT openmw-wizard)
 endif()

components/CMakeLists.txt

@@ -200,14 +200,8 @@ if (USE_QT)
         helpviewer
         )
 
-    if (DESIRED_QT_VERSION MATCHES 4)
-        include(${QT_USE_FILE})
-        QT4_WRAP_UI(ESM_UI_HDR ${ESM_UI})
-        QT4_WRAP_CPP(MOC_SRCS ${COMPONENT_MOC_FILES})
-    else()
-        QT5_WRAP_UI(ESM_UI_HDR ${ESM_UI})
-        QT5_WRAP_CPP(MOC_SRCS ${COMPONENT_MOC_FILES})
-    endif()
+    QT5_WRAP_UI(ESM_UI_HDR ${ESM_UI})
+    QT5_WRAP_CPP(MOC_SRCS ${COMPONENT_MOC_FILES})
 endif()
 
 if (CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
@@ -252,13 +246,7 @@ if (WIN32)
 endif()
 
 if (USE_QT)
-    if (DESIRED_QT_VERSION MATCHES 4)
-        target_link_libraries(components
-        ${QT_QTCORE_LIBRARY}
-        ${QT_QTGUI_LIBRARY})
-    else()
-        target_link_libraries(components Qt5::Widgets Qt5::Core)
-    endif()
+    target_link_libraries(components Qt5::Widgets Qt5::Core)
 endif()
 
 if (GIT_CHECKOUT)

extern/osgQt/CMakeLists.txt

@@ -8,12 +8,7 @@ set(OSGQT_SOURCE_FILES
 
 add_library(${OSGQT_LIBRARY} STATIC ${OSGQT_SOURCE_FILES})
 
-if (DESIRED_QT_VERSION MATCHES 4)
-    include(${QT_USE_FILE})
-    target_link_libraries(${OSGQT_LIBRARY} ${QT_QTCORE_LIBRARY} ${QT_QTOPENGL_LIBRARY})
-else()
-    target_link_libraries(${OSGQT_LIBRARY} Qt5::Core Qt5::OpenGL)
-endif()
+target_link_libraries(${OSGQT_LIBRARY} Qt5::Core Qt5::OpenGL)
 
 link_directories(${CMAKE_CURRENT_BINARY_DIR})
 

extern/osgQt/GraphicsWindowQt.cpp

@@ -17,18 +17,11 @@
 #include <osgViewer/ViewerBase>
 #include <QInputEvent>
 #include <QPointer>
-
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
 #include <QWindow>
-#endif
 
 using namespace osgQt;
 
-#if (QT_VERSION < QT_VERSION_CHECK(5, 2, 0))
-    #define GETDEVICEPIXELRATIO() 1.0
-#else
-    #define GETDEVICEPIXELRATIO() devicePixelRatio()
-#endif
+#define GETDEVICEPIXELRATIO() devicePixelRatio()
 
 GLWidget::GLWidget( QWidget* parent, const QGLWidget* shareWidget, Qt::WindowFlags f)
 : QGLWidget(parent, shareWidget, f), _gw( NULL )
@@ -119,13 +112,11 @@ bool GLWidget::event( QEvent* event )
         enqueueDeferredEvent(QEvent::ParentChange);
         return true;
     }
-#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
     else if (event->type() == QEvent::PlatformSurface && static_cast<QPlatformSurfaceEvent*>(event)->surfaceEventType() == QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed)
     {
         if (_gw)
             _gw->close();
     }
-#endif
 
     // perform regular event handling
     return QGLWidget::event( event );
@@ -209,11 +200,7 @@ bool GraphicsWindowQt::init( QWidget* parent, const QGLWidget* shareWidget, Qt::
         // WindowFlags
         Qt::WindowFlags flags = f | Qt::Window | Qt::CustomizeWindowHint;
         if ( _traits->windowDecoration )
-            flags |= Qt::WindowTitleHint | Qt::WindowMinMaxButtonsHint | Qt::WindowSystemMenuHint
-#if (QT_VERSION_CHECK(4, 5, 0) <= QT_VERSION)
-                | Qt::WindowCloseButtonHint
-#endif
-                ;
+            flags |= Qt::WindowTitleHint | Qt::WindowMinMaxButtonsHint | Qt::WindowSystemMenuHint | Qt::WindowCloseButtonHint;
 
         // create widget
         _widget = new GLWidget( traits2qglFormat( _traits.get() ), parent, shareWidget, flags );
@@ -527,11 +514,10 @@ bool GraphicsWindowQt::releaseContextImplementation()
 
 void GraphicsWindowQt::swapBuffersImplementation()
 {
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
     // QOpenGLContext complains if we swap on an non-exposed QWindow
     if (!_widget || !_widget->windowHandle()->isExposed())
         return;
-#endif
+
     // FIXME: the processDeferredEvents should really be executed in a GUI (main) thread context but
     // I couln't find any reliable way to do this. For now, lets hope non of *GUI thread only operations* will
     // be executed in a QGLWidget::event handler. On the other hand, calling GUI only operations in the