+ add convenience methods to PrefQuantitySpinBox class

src/Gui/PrefWidgets.cpp

@@ -534,6 +534,16 @@ void PrefQuantitySpinBox::contextMenuEvent(QContextMenuEvent *event)
     delete menu;
 }
 
+void PrefQuantitySpinBox::onSave()
+{
+    pushToHistory();
+}
+
+void PrefQuantitySpinBox::onRestore()
+{
+    setToLastUsedValue();
+}
+
 void PrefQuantitySpinBox::pushToHistory(const QString &valueq)
 {
     Q_D(PrefQuantitySpinBox);
@@ -594,7 +604,11 @@ void PrefQuantitySpinBox::setToLastUsedValue()
 void PrefQuantitySpinBox::setParamGrpPath(const QByteArray& path)
 {
     Q_D(PrefQuantitySpinBox);
-    d->handle = App::GetApplication().GetParameterGroupByPath(path);
+    QByteArray groupPath = path;
+    if (!groupPath.startsWith("User parameter:")) {
+        groupPath.prepend("User parameter:BaseApp/Preferences/");
+    }
+    d->handle = App::GetApplication().GetParameterGroupByPath(groupPath);
     if (d->handle.isValid())
         d->prefGrp = path;
 }

src/Gui/PrefWidgets.h

@@ -296,6 +296,10 @@ public:
     int historySize() const;
     /// set the value of the history size property 
     void setHistorySize(int);
+    /// Convenience method as offered by PrefWidget. Does the same as pushToHistory().
+    void onSave();
+    /// Convenience method as offered by PrefWidget. Does the same as setToLastUsedValue().
+    void onRestore();
 
     /** @name history and default management */
     //@{