Add private helper method to replace KGlobalSettins::emitChange()

kcms/kcms-common_p.h

+/*
+    This file is part of the KDE Project
+    SPDX-FileCopyrightText: 2021 Ahmad Samir <a.samirh78@gmail.com>
+
+    SPDX-License-Identifier: LGPL-2.0-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
+*/
+
+#ifndef KCMS_COMMON_P_H
+#define KCMS_COMMON_P_H
+
+#include <QDBusConnection>
+#include <QDBusMessage>
+
+// These two enums are copied from KHintSettings (which copied them from KGlobalSettings)
+enum GlobalChangeType {
+    PaletteChanged = 0,
+    FontChanged,
+    StyleChanged, // 2
+    SettingsChanged,
+    IconChanged,
+    CursorChanged, // 5
+    ToolbarStyleChanged,
+    ClipboardConfigChanged,
+    BlockShortcuts,
+    NaturalSortingChanged,
+};
+
+enum GlobalSettingsCategory {
+    SETTINGS_MOUSE,
+    SETTINGS_COMPLETION,
+    SETTINGS_PATHS,
+    SETTINGS_POPUPMENU,
+    SETTINGS_QT,
+    SETTINGS_SHORTCUTS,
+    SETTINGS_LOCALE,
+    SETTINGS_STYLE,
+};
+
+void notifyKcmChange(GlobalChangeType changeType, int arg = 0)
+{
+    QDBusMessage message =
+        QDBusMessage::createSignal(QStringLiteral("/KGlobalSettings"), QStringLiteral("org.kde.KGlobalSettings"), QStringLiteral("notifyChange"));
+    message.setArguments({changeType, arg});
+    QDBusConnection::sessionBus().send(message);
+}
+
+#endif