diff --git a/examples/collections/buttonexample.cpp b/examples/collections/buttonexample.cpp
index 44c6272ae..c6842ad0d 100644
--- a/examples/collections/buttonexample.cpp
+++ b/examples/collections/buttonexample.cpp
@@ -71,7 +71,7 @@ DPushButtonExample::DPushButtonExample(QWidget *parent)
     DPushButton *pButtonDisabled = new DPushButton("button disabled", this);
     pButtonDisabled->setFixedSize(DSizeModeHelper::element(QSize(200, 24), QSize(200, 36)));
     // connect `sizeModeChanged()` signal to update Size.
-    connect(DGuiApplicationHelper::instance(), &DGuiApplicationHelper::sizeModeChanged, [pButtonDisabled](DGuiApplicationHelper::SizeMode mode) {
+    connect(DGuiApplicationHelper::instance(), &DGuiApplicationHelper::sizeModeChanged, [pButtonDisabled](DGuiApplicationHelper::SizeMode) {
         pButtonDisabled->setFixedSize(DSizeModeHelper::element(QSize(200, 24), QSize(200, 36)));
     });
     pButtonDisabled->setEnabled(false);
@@ -402,7 +402,7 @@ DIconButtonExample::DIconButtonExample(QWidget *parent)
     pButton_8->setIconSize(QSize(16, 16));
     DStyle::setFocusRectVisible(pButton_8, false);
 
-    auto updateButtonSize = [](QWidget *widget, int mode) {
+    auto updateButtonSize = [](QWidget *widget, int) {
         for (auto button : widget->findChildren<DIconButton *>(QString(), Qt::FindDirectChildrenOnly)) {
             if (button->iconSize() == QSize(16, 16)) {
                 button->setFixedSize(DSizeModeHelper::element(QSize(20, 20), QSize(24, 24)));
diff --git a/examples/collections/main.cpp b/examples/collections/main.cpp
index fd63029f8..3e8c00c06 100644
--- a/examples/collections/main.cpp
+++ b/examples/collections/main.cpp
@@ -20,7 +20,9 @@ int main(int argc, char *argv[])
 #endif
     DApplication *a = DApplication::globalApplication(argc, argv);
 
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
     DApplication::setAttribute(Qt::AA_UseHighDpiPixmaps, true);
+#endif
     DLogManager::registerConsoleAppender();
 
     a->loadTranslator();
diff --git a/examples/collections/widgetexample.cpp b/examples/collections/widgetexample.cpp
index af1301d03..9645af6f2 100644
--- a/examples/collections/widgetexample.cpp
+++ b/examples/collections/widgetexample.cpp
@@ -153,7 +153,7 @@ QVariant CalendarModel::data(const QModelIndex &index, int role) const
             return QString::number(days);
         }
     }
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+#if QT_VERSION < QT_VERSION_CHECK(5, 13, 0)
     case Qt::TextColorRole: {
 #else
     case Qt::ForegroundRole:{
@@ -179,7 +179,7 @@ QVariant CalendarModel::data(const QModelIndex &index, int role) const
 QVariant CalendarModel::headerData(int section, Qt::Orientation orientation, int role) const
 {
     if (
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+#if QT_VERSION < QT_VERSION_CHECK(5, 13, 0)
         role == Qt::BackgroundColorRole ||
 #endif
         role == Qt::BackgroundRole)
diff --git a/include/util/dapplicationsettings.h b/include/util/dapplicationsettings.h
index b058ed1eb..730f9cd3e 100644
--- a/include/util/dapplicationsettings.h
+++ b/include/util/dapplicationsettings.h
@@ -19,7 +19,7 @@ class DApplicationSettings : public QObject, public DCORE_NAMESPACE::DObject
     D_DECLARE_PRIVATE(DApplicationSettings)
 
 public:
-    Q_DECL_DEPRECATED_X("The feature has been moved to DGuiApplicationHelper, We can disable it by setting DGuiApplicationHelper::DontSaveApplicationTheme enum with setAttribute.")
+    D_DECL_DEPRECATED_X("The feature has been moved to DGuiApplicationHelper, We can disable it by setting DGuiApplicationHelper::DontSaveApplicationTheme enum with setAttribute.")
     explicit DApplicationSettings(QObject *parent = nullptr);
 
 private:
diff --git a/include/util/dhidpihelper.h b/include/util/dhidpihelper.h
index b9e13b0fb..0d35ebdb5 100644
--- a/include/util/dhidpihelper.h
+++ b/include/util/dhidpihelper.h
@@ -9,10 +9,10 @@
 
 DWIDGET_BEGIN_NAMESPACE
 
-class Q_DECL_DEPRECATED DHiDPIHelper
+class D_DECL_DEPRECATED DHiDPIHelper
 {
 public:
-    Q_DECL_DEPRECATED_X("Use Dtk::Gui::DIcon::loadNxPixmap") static QPixmap loadNxPixmap(const QString &fileName);
+    D_DECL_DEPRECATED_X("Use Dtk::Gui::DIcon::loadNxPixmap") static QPixmap loadNxPixmap(const QString &fileName);
 };
 
 DWIDGET_END_NAMESPACE
diff --git a/plugin/dtkuiplugin/dcustomermacrowidget.h b/plugin/dtkuiplugin/dcustomermacrowidget.h
index e8a1a8030..6880f02a8 100644
--- a/plugin/dtkuiplugin/dcustomermacrowidget.h
+++ b/plugin/dtkuiplugin/dcustomermacrowidget.h
@@ -36,10 +36,8 @@
 #include <DTextEdit>
 #include <DSearchComboBox>
 #include <DSpinBox>
-#include <DSegmentedHighlight>
 #include <DSpinner>
 #include <DToolButton>
-#include <DSegmentedControl>
 #include <DSuggestButton>
 #include <DSwitchButton>
 #include <DWarningButton>
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 795075076..52ea18abe 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -33,6 +33,7 @@ target_compile_definitions(${LIBNAME} PRIVATE
     DTK_NO_MULTIMEDIA
     DWIDGET_TRANSLATIONS_DIR="${TRANSLATIONS_INSTALL_DIR}"
     LIBDTKWIDGET_LIBRARY
+    D_IGNORE_DEPRECATIONS
 )
 
 if(DTK_STATIC_TRANSLATION)
diff --git a/src/util/dwidgetutil.cpp b/src/util/dwidgetutil.cpp
index 31e41ffdf..65118cb04 100644
--- a/src/util/dwidgetutil.cpp
+++ b/src/util/dwidgetutil.cpp
@@ -12,6 +12,7 @@
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 #include <QDesktopWidget>
 #endif
+#include <QScreen>
 
 QT_BEGIN_NAMESPACE
 //extern Q_WIDGETS_EXPORT void qt_blurImage(QImage &blurImage, qreal radius, bool quality, int transposed = 0);
@@ -60,7 +61,7 @@ QImage dropShadow(const QPixmap &px, qreal radius, const QColor &color)
 void moveToCenter(QWidget *w)
 {
     Q_ASSERT(w != nullptr);
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+#if QT_VERSION < QT_VERSION_CHECK(5, 11, 0)
     QDesktopWidget *dw = QApplication::desktop();
     QRect parentRect = dw->availableGeometry(dw->primaryScreen());
 #else
diff --git a/src/widgets/daboutdialog.cpp b/src/widgets/daboutdialog.cpp
index c04535306..3aae73334 100644
--- a/src/widgets/daboutdialog.cpp
+++ b/src/widgets/daboutdialog.cpp
@@ -375,7 +375,8 @@ QPixmap DAboutDialog::companyLogo() const
 #if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     return d->companyLogoLabel->pixmap(Qt::ReturnByValue);
 #else
-    return d->companyLogoLabel->pixmap();
+    const_cast<DAboutDialogPrivate* >(d)->companyLogoPixmap = d->companyLogoLabel->pixmap(Qt::ReturnByValue);
+    return &(d->companyLogoPixmap);
 #endif
 }
 
diff --git a/src/widgets/dbaseexpand.cpp b/src/widgets/dbaseexpand.cpp
index d5e1b0033..13b2d4789 100644
--- a/src/widgets/dbaseexpand.cpp
+++ b/src/widgets/dbaseexpand.cpp
@@ -115,6 +115,7 @@ DBaseExpandPrivate::~DBaseExpandPrivate()
   @fn void DBaseExpand::expandChange(bool e)
   @brief content widget visibility signal
   @param[in] e If "true", the content widget becomes visible, otherwise, the content widget becomes invisible.
+*/
 
 /*!
 @~english
diff --git a/src/widgets/dfontcombobox.cpp b/src/widgets/dfontcombobox.cpp
index d41fa49ae..7658204d5 100644
--- a/src/widgets/dfontcombobox.cpp
+++ b/src/widgets/dfontcombobox.cpp
@@ -52,6 +52,8 @@ DFontComboBoxPrivate::~DFontComboBoxPrivate()
   @endcode
   
   @image html DFontComboBox.png
+*/
+
 /*!
 @~english
   @brief DFontComboBox constructor.
diff --git a/src/widgets/dlineedit.cpp b/src/widgets/dlineedit.cpp
index ebb377e07..ac09a9c9c 100644
--- a/src/widgets/dlineedit.cpp
+++ b/src/widgets/dlineedit.cpp
@@ -494,7 +494,7 @@ bool DLineEdit::eventFilter(QObject *watched, QEvent *event)
     D_D(DLineEdit);
 
     if (event->type() == QEvent::FocusIn) {
-        if (DGuiApplicationHelper::IsTableEnvironment && QGuiApplication::inputMethod())
+        if (DGuiApplicationHelper::testAttribute(DGuiApplicationHelper::IsTableEnvironment) && QGuiApplication::inputMethod() != nullptr)
             QGuiApplication::inputMethod()->show();
         Q_EMIT focusChanged(true);
     } else if (event->type() == QEvent::FocusOut) {
diff --git a/src/widgets/dprintpreviewwidget.cpp b/src/widgets/dprintpreviewwidget.cpp
index 1898aa442..b8d494f41 100644
--- a/src/widgets/dprintpreviewwidget.cpp
+++ b/src/widgets/dprintpreviewwidget.cpp
@@ -1222,7 +1222,7 @@ QVector<int> DPrintPreviewWidgetPrivate::requestPages(int page)
   \a parent 父控件
  */
 DPrintPreviewWidget::DPrintPreviewWidget(DPrinter *printer, QWidget *parent)
-    : DFrame(*new DPrintPreviewWidgetPrivate(this))
+    : DFrame(*new DPrintPreviewWidgetPrivate(this), parent)
 {
     Q_D(DPrintPreviewWidget);
     d->previewPrinter = printer;
diff --git a/src/widgets/dstyle.cpp b/src/widgets/dstyle.cpp
index ad69aa235..6129cca59 100644
--- a/src/widgets/dstyle.cpp
+++ b/src/widgets/dstyle.cpp
@@ -2194,7 +2194,7 @@ void DStyle::drawControl(QStyle::ControlElement ce, const QStyleOption *opt, QPa
  */
 int DStyle::pixelMetric(QStyle::PixelMetric m, const QStyleOption *opt, const QWidget *widget) const
 {
-    switch (m) {
+    switch (static_cast<uint32_t>(m)) {
     case PM_ButtonDefaultIndicator:
     case PM_ButtonShiftHorizontal:
     case PM_ButtonShiftVertical:
diff --git a/src/widgets/dstyleditemdelegate.cpp b/src/widgets/dstyleditemdelegate.cpp
index fbdaf819b..b10a4043d 100644
--- a/src/widgets/dstyleditemdelegate.cpp
+++ b/src/widgets/dstyleditemdelegate.cpp
@@ -83,6 +83,7 @@ DWIDGET_END_NAMESPACE
 Q_DECLARE_METATYPE(DTK_WIDGET_NAMESPACE::ActionList)
 
 DWIDGET_BEGIN_NAMESPACE
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 static void saveDViewItemActionList(QDataStream &s, const void *d)
 {
     const ActionList &data = *static_cast<const ActionList*>(d);
@@ -95,17 +96,18 @@ static void loadDViewItemActionList(QDataStream &s, void *d)
     s >> data;
 }
 
-__attribute__((constructor))
 static void registerMetaType ()
 {
-    #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     // register DViewItemActionList's stream operator to support that QMetaType can using save and load function.
     QMetaType::registerStreamOperators(QMetaTypeId<DTK_WIDGET_NAMESPACE::ActionList>::qt_metatype_id(),
                                        saveDViewItemActionList,
                                        loadDViewItemActionList);
-    #endif
 }
 
+Q_CONSTRUCTOR_FUNCTION(registerMetaType)
+
+#endif
+
 static DViewItemActionList qvariantToActionList(const QVariant &v)
 {
     const ActionList &wrapper = v.value<ActionList>();
diff --git a/src/widgets/private/daboutdialog_p.h b/src/widgets/private/daboutdialog_p.h
index b0006c65a..7808a33b7 100644
--- a/src/widgets/private/daboutdialog_p.h
+++ b/src/widgets/private/daboutdialog_p.h
@@ -44,6 +44,9 @@ class DAboutDialogPrivate : public DDialogPrivate
     QLabel *licenseTipLabel = nullptr;
     QLabel *licenseLabel = nullptr;
     QLabel *companyLogoLabel = nullptr;
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+    QPixmap companyLogoPixmap;
+#endif
     QLabel *websiteLabel = nullptr;
     QLabel *featureLabel = nullptr;
     DRedPointLabel *redPointLabel = nullptr;
diff --git a/src/widgets/private/dprintpreviewwidget_p.h b/src/widgets/private/dprintpreviewwidget_p.h
index 21139c32e..ead21a91c 100644
--- a/src/widgets/private/dprintpreviewwidget_p.h
+++ b/src/widgets/private/dprintpreviewwidget_p.h
@@ -409,7 +409,7 @@ struct DPrintPreviewWidgetPrivate::NumberUpData {
 
     QVector<QPointF> updatePositions(const qreal &scale)
     {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
         QRectF pageRect = parent->previewPrinter->pageLayout().paintRectPixels(parent->previewPrinter->resolution());
 #else
         QRectF pageRect = parent->previewPrinter->pageRect();
@@ -474,7 +474,7 @@ struct DPrintPreviewWidgetPrivate::NumberUpData {
     {
         if (waterList.isEmpty())
             return;
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
         QRectF pageRect = parent->previewPrinter->pageLayout().paintRectPixels(parent->previewPrinter->resolution());
 #else
         QRectF pageRect = parent->previewPrinter->pageRect();
diff --git a/src/widgets/private/dtitlebareditpanel.cpp b/src/widgets/private/dtitlebareditpanel.cpp
index 0c50c2434..9b4e5234c 100644
--- a/src/widgets/private/dtitlebareditpanel.cpp
+++ b/src/widgets/private/dtitlebareditpanel.cpp
@@ -351,7 +351,7 @@ void DCollapseWidget::updateMinimumValue()
                 continue;
             minimum += w->width();
             qDebug() << "+" << w->width();
-            if (auto dragDropWidget = qobject_cast<DragDropWidget *>(w)) {
+            if (qobject_cast<DragDropWidget *>(w)) {
                if (m_settingsImpl->isSpacerTool(m_settingsImpl->findKeyByPos(i)) && !m_settingsImpl->isStrecherTool(m_settingsImpl->findKeyByPos(i))) {
                    minimum += SPACING;
                    qDebug() << "+" << SPACING;
@@ -402,7 +402,7 @@ void DCollapseWidget::collapse()
     }
 
     if (auto item = m_mainHLayout->takeAt(index)) {
-        if (auto spacerItem = item->spacerItem()) { // 如果是spacer，只存数据，不处理expand按钮
+        if (item->spacerItem()) { // 如果是spacer，只存数据，不处理expand按钮
             QPair<QString, QWidget*> tmp{m_settingsImpl->findKeyByPos(index), nullptr};
             m_viewsInMenu.append(tmp);
             qDebug() << "collapse:" << m_viewsInMenu;
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 2156dde7b..6a5efd32b 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -133,6 +133,7 @@ target_compile_definitions(${BINNAME} PRIVATE
     SN_API_NOT_YET_FROZEN
     DTK_NO_MULTIMEDIA
     DWIDGET_TRANSLATIONS_DIR="dtk${PROJECT_VERSION_MAJOR}/DWidget/translations"
+    D_IGNORE_DEPRECATIONS
 )
 
 if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
diff --git a/tests/testcases/widgets/ut_dcombobox.cpp b/tests/testcases/widgets/ut_dcombobox.cpp
index b8145aa4a..cc528b198 100644
--- a/tests/testcases/widgets/ut_dcombobox.cpp
+++ b/tests/testcases/widgets/ut_dcombobox.cpp
@@ -30,7 +30,7 @@ TEST_F(ut_DComboBox, maxVisibleItems)
         target->addItem(QString::number(i));
     }
     target->show();
-    QTest::qWaitForWindowExposed(target->windowHandle());
+    (void)QTest::qWaitForWindowExposed(target->windowHandle());
 
     const QPoint arrowPos(target->rect().right() - 1, target->rect().center().y());
     QTest::mouseClick(target, Qt::LeftButton, Qt::KeyboardModifiers(), arrowPos);
diff --git a/tests/testcases/widgets/ut_dtextedit.cpp b/tests/testcases/widgets/ut_dtextedit.cpp
index ec9f04dbc..4e9d2abbe 100644
--- a/tests/testcases/widgets/ut_dtextedit.cpp
+++ b/tests/testcases/widgets/ut_dtextedit.cpp
@@ -75,6 +75,10 @@ TEST_F(ut_DTextEdit, testDTextEditKeyPressEvent)
 
 TEST_F(ut_DTextEdit, testDTextEditContextMenuEvent)
 {
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+    QContextMenuEvent menuEvent(QContextMenuEvent::Mouse, QPoint(0,0), QPoint(0,0));
+#else
     QContextMenuEvent menuEvent(QContextMenuEvent::Mouse, QPoint(0,0));
+#endif
     widget->contextMenuEvent(&menuEvent);
 }