+ zoom_in_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Plus), this, SLOT(on_zoom_in_shortcut_triggered()));
+ zoom_in_shortcut_->setAutoRepeat(false);
+
+ zoom_out_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Minus), this, SLOT(on_zoom_out_shortcut_triggered()));
+ zoom_out_shortcut_->setAutoRepeat(false);
+