Use QSettings to set the working and home directory

Qucs Transcalc was using a fixed path (~/.qucs) to store and
retrieve the GUI input values, ignoring the QucsHomeDir that
could have been defined by the main GUI

qucs/qucs-transcalc/main.cpp

@@ -58,6 +58,11 @@ bool loadSettings()
     settings.endGroup();
     if(settings.contains("font"))QucsSettings.font.fromString(settings.value("font").toString());
     if(settings.contains("Language"))QucsSettings.Language=settings.value("Language").toString();
+    if(settings.contains("QucsHomeDir"))
+      if(settings.value("QucsHomeDir").toString() != "")
+	QucsSettings.QucsHomeDir.setPath(settings.value("QucsHomeDir").toString());
+
+    QucsSettings.QucsWorkDir = QucsSettings.QucsHomeDir;
 
   return true;
 }
@@ -79,8 +84,8 @@ bool saveApplSettings(QucsTranscalc *qucs)
     settings.setValue("ResUnit", TransUnits[2].units[QucsSettings.res_unit]);
     settings.setValue("AngUnit", TransUnits[3].units[QucsSettings.ang_unit]);
     settings.endGroup();
-  return true;
 
+    return true;
 }
 
 
@@ -102,6 +107,7 @@ int main(int argc, char *argv[])
   QucsSettings.res_unit = 0;
   QucsSettings.ang_unit = 0;
   QucsSettings.freq_unit = 0;
+  QucsSettings.QucsHomeDir.setPath(QDir::homePath() + "/.qucs");
 
   // is application relocated?
   char * var = getenv ("QUCSDIR");
@@ -113,7 +119,6 @@ int main(int argc, char *argv[])
   } else {
     QucsSettings.LangDir = LANGUAGEDIR;
   }
-  QucsSettings.QucsWorkDir.setPath (QDir::homePath()+QDir::convertSeparators ("/.qucs"));
   loadSettings();
 
   QApplication a(argc, argv);
@@ -132,7 +137,8 @@ int main(int argc, char *argv[])
   qucs->move(QucsSettings.x, QucsSettings.y);     // ... before "show" !!!
   qucs->show();
 
-  qucs->loadFile(QDir::homePath()+"/.qucs/transrc");
+  // load file with all the GUI input values from the Qucs Home
+  qucs->loadFile(QucsSettings.QucsHomeDir.filePath("transrc"));
   qucs->setMode(QucsSettings.Mode);
 
   // optional file argument
@@ -144,6 +150,8 @@ int main(int argc, char *argv[])
 
   int result = a.exec();
   saveApplSettings(qucs);
+  // save file with all the GUI input values in the Qucs Home
+  qucs->saveModes(QucsSettings.QucsHomeDir.filePath("transrc"));
   delete qucs;
   return result;
 }

qucs/qucs-transcalc/qucstrans.cpp

@@ -1079,14 +1079,28 @@ void QucsTranscalc::saveMode(QTextStream& stream) {
   stream << "</" << t->description << ">\n";
 }
 
-// Writes the transmission line values for all modes into the given stream.
-void QucsTranscalc::saveModes(QTextStream& stream) {
+// Writes the transmission line values for all modes into the given file.
+bool QucsTranscalc::saveModes(QString fname) {
   int oldmode = mode;
+
+  QFile file(fname);
+  if(!file.open(QIODevice::WriteOnly)) {
+    QMessageBox::warning(this, QObject::tr("Warning"),
+			 QObject::tr("Cannot save GUI settings in\n") + fname);
+    return false;
+  }
+
+  QTextStream stream(&file);
+  stream << "QucsTranscalc " PACKAGE_VERSION " GUI Settings File\n";
   for (int i = 0; i < MAX_TRANS_TYPES; i++) {
     mode = TransLineTypes[i].type;
     saveMode (stream);
   }
+  file.close();
+
   mode = oldmode;
+
+  return true;
 }
 
 // Saves the GUI values into internal data structures.

qucs/qucs-transcalc/qucstrans.h

@@ -148,7 +148,7 @@ class QucsTranscalc : public QMainWindow  {
   bool    isSelected (QString);
 
   void    saveMode (QTextStream&);
-  void    saveModes (QTextStream&);
+  bool    saveModes (QString);
   bool    loadFile (QString, int * _mode = 0);
   QString getMode (void);
   void    setMode (QString);