Rewrite dbus calls to system calls of dbus-send

CMakeLists.txt

@@ -22,6 +22,8 @@ add_executable(plasma-theme
         utils/plasma.cpp
         utils/plasma.h
         exceptions/RuntimeException.cpp
-        exceptions/RuntimeException.h)
+        exceptions/RuntimeException.h
+        utils/signals.cpp
+        utils/signals.h)
 
-target_link_libraries(plasma-theme KF5::ConfigCore Qt5::DBus)
+target_link_libraries(plasma-theme KF5::ConfigCore)

utils/plasma.cpp

@@ -4,13 +4,9 @@
 #include <QtDBus/QDBusMessage>
 #include <QtDBus/QDBusConnection>
 #include <QtCore/QFileInfo>
+#include "signals.h"
 #include "exceptions/RuntimeException.h"
 
-enum KdeGlobalsChangeType {
-    ColorSchemeChanged = 0,
-    WidgetStyleChanged = 2
-};
-
 void configMerge(const KSharedConfigPtr &srcConf, const KSharedConfigPtr &dstConf) {
     for (const QString &group: srcConf->groupList()) {
         // General group contains no color information and the name will be applied via another call
@@ -56,17 +52,6 @@ void applyColorSchemeToFile(const QString &src, const QString &dst) {
     dstConf->sync();
 }
 
-void kdeGlobalSettingsNotifyChange(KdeGlobalsChangeType changeType) {
-    QDBusMessage message = QDBusMessage::createSignal(
-            "/KGlobalSettings",
-            "org.kde.KGlobalSettings",
-            "notifyChange"
-    );
-
-    message.setArguments(QList<QVariant>{changeType, 0});
-    QDBusConnection::sessionBus().send(message);
-}
-
 inline QString locateKdeGlobals() {
     return QStandardPaths::locate(QStandardPaths::GenericConfigLocation, "kdeglobals");
 }
@@ -113,13 +98,12 @@ void emitWidgetStyleChangedSignals(const QString &widgetStyle) {
     kdeGlobalSettingsNotifyChange(WidgetStyleChanged);
 
     for (const QString &intf: QStringList{"org.freedesktop.impl.portal.Settings", "org.freedesktop.portal.Settings"}) {
-        QDBusMessage message = QDBusMessage::createSignal(
+        dbusSignal(
                 "/org/freedesktop/portal/desktop",
                 intf,
-                "SettingChanged"
+                "SettingChanged",
+                QStringList{"org.kde.kdeglobals.KDE", "widgetStyle", widgetStyle}
         );
-        message.setArguments(QList<QVariant>{"org.kde.kdeglobals.KDE", "widgetStyle", widgetStyle});
-        QDBusConnection::sessionBus().send(message);
     }
 }
 

utils/signals.cpp

@@ -0,0 +1,19 @@
+#include <QString>
+#include <QtCore/QProcess>
+#include "signals.h"
+
+void dbusSignal(const QString &path, const QString &interface, const QString &name, QStringList arguments) {
+    arguments.prepend(interface + "." + name);
+    arguments.prepend(path);
+    arguments.prepend("--type=signal");
+
+    QProcess process;
+    process.start("dbus-send", arguments);
+    process.waitForFinished();
+}
+
+void kdeGlobalSettingsNotifyChange(KdeGlobalsChangeType changeType) {
+    auto type = QString("int32:%0").arg(changeType);
+
+    dbusSignal("/KGlobalSettings", "org.kde.KGlobalSettings", "notifyChange", QStringList{type, "int32:0"});
+}

utils/signals.h

@@ -0,0 +1,10 @@
+#include <QString>
+#include <QStringList>
+
+enum KdeGlobalsChangeType {
+    ColorSchemeChanged = 0,
+    WidgetStyleChanged = 2
+};
+
+void kdeGlobalSettingsNotifyChange(KdeGlobalsChangeType changeType);
+void dbusSignal(const QString &path, const QString &interface, const QString &name, QStringList arguments);