close button using connect method over ui file

AboutDialog.cpp

@@ -32,8 +32,3 @@ AboutDialog::~AboutDialog()
 {
     delete ui;
 }
-
-void AboutDialog::on_cmdClose_clicked()
-{
-    this->close();
-}

AboutDialog.h

@@ -34,7 +34,6 @@ public:
     ~AboutDialog();
 
 private slots:
-    void on_cmdClose_clicked();
 
 private:
     Ui::AboutDialog *ui;

AboutDialog.ui

@@ -110,5 +110,22 @@
   </layout>
  </widget>
  <resources/>
- <connections/>
+ <connections>
+  <connection>
+   <sender>cmdClose</sender>
+   <signal>clicked()</signal>
+   <receiver>AboutDialog</receiver>
+   <slot>close()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>327</x>
+     <y>228</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>187</x>
+     <y>124</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
 </ui>