const QString GlobalSettings::Key_View_AlwaysZoomToFit = "View_AlwaysZoomToFit";
const QString GlobalSettings::Key_View_ColouredBG = "View_ColouredBG";
+const QString GlobalSettings::Key_View_StickyScrolling = "View_StickyScrolling";
std::multimap< QString, std::function<void(QVariant)> > GlobalSettings::callbacks_;
bool GlobalSettings::tracking_ = false;