Add vector of RenderLayout

Add a button and the functions associated with it to display several traces.

src/core/Core.cpp

@@ -379,24 +379,6 @@ cleanup:
  *
  **********************************/
 
-void Core::draw_trace(Trace *trace) {
-
-    // Set application in working state
-    QApplication::setOverrideCursor(Qt::WaitCursor);
-
-    // We add the filename to the recent files opened list
-    Session::add_recent_file(QFileInfo(QString::fromStdString(trace->get_filename())).absoluteFilePath());
-    _main_window->update_recent_files_menu();
-
-    DrawTrace drawing_ogl;
-    GanttDiagram render(_main_window->get_render_area());
-    drawing_ogl.build(&render, trace);
-    _main_window->get_render_area()->build();
-    _main_window->get_render_area()->refresh_scroll_bars();
-
-    QApplication::restoreOverrideCursor();
-}
-
 Trace *Core::build_trace(const std::string &filename, bool is_state_splitting) {
 
     Parser *parser = nullptr;
@@ -662,7 +644,7 @@ void Core::launch_action(int state, void *arg) {
                     break;
                 }
 
-                draw_trace(trace);
+                _main_window->draw_trace(trace, 0);
 
                 // If -t has been set, we define the interval to zoom in
                 if (_time_start != 0 && _time_end == 0.)