Revert "fix subsribe to settings changes"

This reverts commit bd6dd8ecca2c0e2210b55e2fff1a3bee200736bc.

settingslistner.cpp

@@ -7,46 +7,26 @@
 
 #include "isettings.h"
 #include "settingslistner.h"
-#include "params.h"
 
 namespace QuasarAppUtils {
 
 SettingsListner::SettingsListner() {
+
+    auto settings = ISettings::instance();
+    if (settings) {
+
+        auto listner = [this](QString key, QVariant val){
+            this->handleSettingsChanged(key, val);
+        };
+
+        _listnerConnection = QObject::connect(settings,
+                                              &ISettings::valueChanged,
+                                              listner);
+    }
 }
 
 SettingsListner::~SettingsListner() {
     QObject::disconnect(_listnerConnection);
 }
 
-bool SettingsListner::handleSettings() {
-
-    auto settings = ISettings::instance();
-    if (!settings) {
-        Params::log("Settings object is not initialised!"
-                    "please invoke ISettings::init before subscribe",
-                    Error);
-        return false;
-    }
-
-    auto listner = [this](QString key, QVariant val){
-        this->handleSettingsChanged(key, val);
-    };
-
-    QObject * thiz = dynamic_cast<QObject*>(this);
-
-    if (!thiz) {
-        Params::log("Object that use the SettingsListner should be QObject."
-                    "The handleSettingsChanged method will not invoked when settings has changed",
-                    Error);
-        return false;
-    }
-
-    _listnerConnection = thiz->connect(settings,
-                                       &ISettings::valueChanged,
-                                       thiz, listner,
-                                       Qt::QueuedConnection);
-
-    return true;
-}
-
 }

settingslistner.h

@@ -24,12 +24,6 @@ namespace QuasarAppUtils {
  *
  * @code{cpp}
  *  class MyClass : protected QuasarAppUtils::SettingsListner {
- *
- *  public:
- *      MyClass(){
- *          handleSettings();
- *      }
- *
  *  protected:
  *      void handleSettingsChanged(const QString& key, const QVariant& value) override {
  *
@@ -40,9 +34,6 @@ namespace QuasarAppUtils {
  *
  *  };
  * @endcode
- *
- * @warning For correctly working this handler you should be create a class that inherit of the QObject class else
- *  the SettingsListner::handleSettingsChanged will nit invoked when settings has changed.
  * @see ISettings
  */
 class QUASARAPPSHARED_EXPORT SettingsListner
@@ -53,13 +44,6 @@ public:
 
 protected:
 
-    /**
-     * @brief handleSettings This method subscribe this class to listning settings changes.
-     * @return true if subscribed successful else false.
-     * @see SettingsListner::handleSettingsChanged
-     */
-    bool handleSettings();
-
     /**
      * @brief handleSettingsChanged This method will be invoked when settings of application has bean changed.
      * @param key This is key of a changed settings.