Update color when theme changed

src/apps/knotesakonaditray.h

@@ -15,9 +15,9 @@ public:
     ~KNotesAkonadiTray() override;
 
     void updateNumberOfNotes(int number);
+    void slotGeneralPaletteChanged();
 
 private:
-    void slotGeneralPaletteChanged();
     const QIcon mIcon;
     QColor mTextColor;
 };

src/apps/knotesapp.cpp

@@ -212,6 +212,9 @@ KNotesApp::KNotesApp(QWidget *parent)
 
     QGuiApplication::setFallbackSessionManagementEnabled(false);
     updateNoteActions();
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+    connect(qApp, &QGuiApplication::paletteChanged, this, &KNotesApp::slotGeneralPaletteChanged);
+#endif
 }
 
 KNotesApp::~KNotesApp()
@@ -227,6 +230,22 @@ KNotesApp::~KNotesApp()
     m_publisher = nullptr;
 }
 
+void KNotesApp::slotGeneralPaletteChanged()
+{
+    mTray->slotGeneralPaletteChanged();
+    mTray->updateNumberOfNotes(mNotes.count());
+}
+
+bool KNotesApp::event(QEvent *e)
+{
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    if (e->type() == QEvent::ApplicationPaletteChange) {
+        slotGeneralPaletteChanged();
+    }
+#endif
+    return QWidget::event(e);
+}
+
 void KNotesApp::slotDeleteSelectedNotes()
 {
     QPointer<KNoteDeleteSelectedNotesDialog> dlg = new KNoteDeleteSelectedNotesDialog(this);

src/apps/knotesapp.h

@@ -52,6 +52,9 @@ public Q_SLOTS:
     void setName(Akonadi::Item::Id id, const QString &newName);
     void setText(Akonadi::Item::Id id, const QString &newText);
 
+protected:
+    Q_REQUIRED_RESULT bool event(QEvent *e) override;
+
 private:
     void showNote(KNote *note) const;
 
@@ -82,6 +85,7 @@ private Q_SLOTS:
     void newNoteFromTextFile();
 
 private:
+    void slotGeneralPaletteChanged();
     void saveNotes(bool force = false, bool sync = false);
     void updateNetworkListener();
     void updateSystray();