fix: load file popups an error dialog about trigger support

DSView/pv/device/devinst.cpp

@@ -35,6 +35,7 @@ DevInst::DevInst() :
     _usable(true)
 {
     _id = malloc(1);
+	_is_file = false;
 }
 
 DevInst::~DevInst()

DSView/pv/device/devinst.h

@@ -105,13 +105,15 @@ public:
      *
      * @return device name
      */
-    QString name();
- 
+    QString name(); 
 
     bool is_usable();
-
     void destroy();
 
+    inline bool is_file(){
+        return _is_file;
+    }
+
 public:
 	virtual void start();
 
@@ -139,6 +141,7 @@ protected:
 	SigSession *_owner;
     void *_id;
     bool _usable;
+    bool  _is_file;
 };
 
 } // device

DSView/pv/device/inputfile.cpp

@@ -35,6 +35,7 @@ InputFile::InputFile(QString path) :
 	File(path),
 	_input(NULL)
 {
+	_is_file = true;
 }
 
 sr_dev_inst* InputFile::dev_inst()

DSView/pv/device/sessionfile.cpp

@@ -29,6 +29,7 @@ SessionFile::SessionFile(QString path) :
 	File(path)
 {
 	_sdi = NULL;
+	_is_file = true;
 }
 
 sr_dev_inst* SessionFile::dev_inst()

DSView/pv/dock/triggerdock.cpp

@@ -200,7 +200,8 @@ void TriggerDock::adv_trigger()
         } else {
             widget_enable(0);
         }
-    } else {
+    }
+    else if (_session->get_device()->is_file() == false){
         dialogs::DSMessageBox msg(this);
         msg.mBox()->setText(tr("Trigger"));
         msg.mBox()->setInformativeText(tr("Advanced Trigger need DSLogic Hardware Support!"));