Disable the slider of triger pannel when device is stream mode

DSView/pv/dock/triggerdock.cpp

@@ -278,6 +278,10 @@ void TriggerDock::device_updated()
 
             sample_limits = _session->get_device()->get_sample_limit();
 
+            _adv_radioButton->setEnabled(!stream);
+            _position_spinBox->setEnabled(!stream);
+            _position_slider->setEnabled(!stream);
+
             if (stream)
                 maxRange = 1;
             else if (hw_depth >= sample_limits)

DSView/pv/dock/triggerdock.h

@@ -88,7 +88,7 @@ private:
     bool commit_trigger();
  
 
-public slots:
+private slots:
     void simple_trigger();
     void adv_trigger();
     void widget_enable(int index);