new GmshRestoreDefaultOptions() and GmshClearProject() api

Common/Gmsh.cpp

@@ -139,12 +139,25 @@ int GmshGetOption(const std::string &category, const std::string &name,
   return ColorOption(GMSH_GET, category.c_str(), index, name.c_str(), value);
 }
 
+int GmshRestoreDefaultOptions()
+{
+  ReInitOptions(0);
+  InitOptionsGUI(0);
+  return 1;
+}
+
 int GmshOpenProject(const std::string &fileName)
 {
   OpenProject(fileName);
   return 1;
 }
 
+int GmshClearProject()
+{
+  ClearProject();
+  return 1;
+}
+
 int GmshMergeFile(const std::string &fileName)
 {
   return MergeFile(fileName, true);

Common/Gmsh.h

@@ -27,7 +27,9 @@ int GmshGetOption(const std::string &category, const std::string &name,
                   double &value, int index=0);
 int GmshGetOption(const std::string &category, const std::string &name,
                   unsigned int &value, int index=0);
+int GmshRestoreDefaultOptions();
 int GmshOpenProject(const std::string &fileName);
+int GmshClearProject();
 int GmshMergeFile(const std::string &fileName);
 int GmshMergePostProcessingFile(const std::string &fileName);
 int GmshWriteFile(const std::string &fileName);

contrib/mobile/drawContext.cpp

@@ -80,13 +80,16 @@ void drawContext::load(std::string filename)
   if(locked) return;
 
   // delete all models and post-processing views
-  ClearProject();
+  GmshClearProject();
 
   // reset onelab database
   onelab::server::instance()->clear();
 
+  // restore default options
+  GmshRestoreDefaultOptions();
+
   // open the file with Gmsh
-  OpenProject(filename);
+  GmshOpenProject(filename);
 
   // reset openGL view
   eventHandler(10);