[Simulator] Make sure a default Data File is always suggested in startup dialog; Fix silent exit upon startup if no file/data was provided.

companion/src/simulation/simulatordialog.cpp

@@ -202,12 +202,13 @@ bool SimulatorDialog::setStartupData(const QByteArray & dataSource, bool fromFil
       }
     }
     // again there's no way to tell what the error from Storage actually was, so if the file doesn't exist we'll create a new one
-    else if (!QFile(QString(dataSource)).exists()) {
+    else if (!dataSource.isEmpty() && !QFile(QString(dataSource)).exists()) {
       startupData = dataSource;
       startupFromFile = true;
       return true;
     }
     else {
+      ret = 0;
       error = store.error();
     }
   }
@@ -265,6 +266,10 @@ bool SimulatorDialog::setOptions(SimulatorOptions & options, bool withSave)
   else if (options.startupDataType == SimulatorOptions::START_WITH_FILE && !options.dataFile.isEmpty()) {
     ret = setStartupData(options.dataFile.toLocal8Bit(), true);
   }
+  else {
+    QString error = tr("Invalid startup data provided. Plese specify a proper file/path.");
+    QMessageBox::critical(this, tr("Simulator Startup Error"), error);
+  }
 
   if (ret && withSave)
     g.profile[radioProfileId].simulatorOptions(options);

companion/src/simulation/simulatorstartupdialog.cpp

@@ -173,8 +173,9 @@ void SimulatorStartupDialog::loadRadioProfile(int id)
     ui->radioType->setCurrentIndex(i);
 
   tmpstr = m_options->dataFile;
-  if (!tmpstr.isEmpty())
-    ui->dataFile->setText(tmpstr);
+  if (tmpstr.isEmpty())
+    tmpstr = radioEepromFileName(ui->radioType->currentText());
+  ui->dataFile->setText(tmpstr);
 
   tmpstr = m_options->dataFolder;
   if (tmpstr.isEmpty())

companion/src/simulator.cpp

@@ -276,11 +276,14 @@ int main(int argc, char *argv[])
   int result = 1;
   SimulatorDialog * dialog = new SimulatorDialog(NULL, simulator, SIMULATOR_FLAGS_STANDALONE);
   dialog->setRadioProfileId(profileId);
-  if ((result = (int)dialog->setOptions(simOptions, true))) {
+  if (dialog->setOptions(simOptions, true)) {
     dialog->start();
     dialog->show();
     result = app.exec();
   }
+  else {
+    result = 3;
+  }
   g.id(oldProfId);
   delete dialog;
   delete simulator;