Automatically set toggle selection metaphor to be the default one in case none is selected.

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@11314 383ad7c9-94d9-4d36-a494-682f7c89f535

Plugin-SelectionBase/SelectionBasePlugin.cc

@@ -675,9 +675,11 @@ void SelectionBasePlugin::updateActivePrimitiveTypes(bool _checked) {
     // If currently selected selection mode is not available
     // for the currently active primitive types, reset selection mode
     QList<QAction*> sm_actions = selectionModesGroup_->actions();
+    bool atLeastOneSelectionMode = false;
     for(int i = 0; i < sm_actions.size(); ++i) {
 
         if(sm_actions[i]->isChecked()) {
+            atLeastOneSelectionMode = true;
             HandleAction* ha = 0;
             ha = dynamic_cast<HandleAction*>(sm_actions[i]);
             if(ha) {
@@ -690,6 +692,10 @@ void SelectionBasePlugin::updateActivePrimitiveTypes(bool _checked) {
             }
         }
     }
+    // If no selection mode is active, automatically go into toggle mode
+    if(!atLeastOneSelectionMode) {
+        toggleSelectionAction_->trigger();
+    }
 
     // Automatically show tab widget associated to this primitive type
     std::map<QString,SelectionEnvironment>::iterator sit = selectionEnvironments_.find(clickedAction->selectionEnvironmentHandle());