diff --git a/ui/drivers/qt/playlist.cpp b/ui/drivers/qt/playlist.cpp
index a3c81c3502..fbb6989da1 100644
--- a/ui/drivers/qt/playlist.cpp
+++ b/ui/drivers/qt/playlist.cpp
@@ -37,6 +37,20 @@ inline static bool comp_hash_label_key_lower(const QHash<QString, QString> &lhs,
    return lhs.value("label").toLower() < rhs.value("label").toLower();
 }
 
+/* https://stackoverflow.com/questions/7246622/how-to-create-a-slider-with-a-non-linear-scale */
+static double expScale(double inputValue, double midValue, double maxValue)
+{
+   double returnValue = 0;
+   double M = maxValue / midValue;
+   double C = log(pow(M - 1, 2));
+   double B = maxValue / (exp(C) - 1);
+   double A = -1 * B;
+
+   returnValue = A + B * exp(C * inputValue);
+
+   return returnValue;
+}
+
 static void addDirectoryFilesToList(QStringList &list, QDir &dir)
 {
    QStringList dirList = dir.entryList(QStringList(), QDir::Dirs | QDir::Files | QDir::NoDotAndDotDot | QDir::Hidden | QDir::System, QDir::Name);
@@ -908,6 +922,33 @@ finish:
    addPlaylistHashToGrid(items);
 }
 
+/* https://gist.github.com/andrey-str/0f9c7709cbf0c9c49ef9 */
+static void setElidedText(QLabel *label, QWidget *clipWidget, int padding, const QString &text)
+{
+   QFontMetrics metrix(label->font());
+   int width = clipWidget->width() - padding;
+   QString clippedText = metrix.elidedText(text, Qt::ElideRight, width);
+   label->setText(clippedText);
+}
+
+inline void MainWindow::calcGridItemSize(GridItem *item, int zoomValue)
+{
+   int newSize = 0;
+   QLabel *label = NULL;
+
+   if (zoomValue < 50)
+      newSize = expScale(lerp(0, 49, 25, 49, zoomValue) / 50.0, 102, 256);
+   else
+      newSize = expScale(zoomValue / 100.0, 256, 1024);
+
+   item->widget->setFixedSize(QSize(newSize, newSize));
+
+   label = item->widget->findChild<QLabel*>("thumbnailQLabel");
+
+   if (label)
+      setElidedText(label, item->widget, item->widget->layout()->contentsMargins().left() + item->widget->layout()->spacing() + 2, item->labelText);
+}
+
 void MainWindow::addPlaylistHashToGrid(const QVector<QHash<QString, QString> > &items)
 {
    QScreen *screen = qApp->primaryScreen();
diff --git a/ui/drivers/qt/ui_qt_window.cpp b/ui/drivers/qt/ui_qt_window.cpp
index 44583f313a..460e7542ad 100644
--- a/ui/drivers/qt/ui_qt_window.cpp
+++ b/ui/drivers/qt/ui_qt_window.cpp
@@ -113,24 +113,6 @@ static const QPixmap getInvader()
    return pix;
 }
 
-static double lerp(double x, double y, double a, double b, double d) {
-  return a + (b - a) * ((double)(d - x) / (double)(y - x));
-}
-
-/* https://stackoverflow.com/questions/7246622/how-to-create-a-slider-with-a-non-linear-scale */
-static double expScale(double inputValue, double midValue, double maxValue)
-{
-   double returnValue = 0;
-   double M = maxValue / midValue;
-   double C = log(pow(M - 1, 2));
-   double B = maxValue / (exp(C) - 1);
-   double A = -1 * B;
-
-   returnValue = A + B * exp(C * inputValue);
-
-   return returnValue;
-}
-
 #ifdef HAVE_LIBRETRODB
 static void scan_finished_handler(void *task_data, void *user_data, const char *err)
 {
@@ -156,15 +138,6 @@ static void scan_finished_handler(void *task_data, void *user_data, const char *
 }
 #endif
 
-/* https://gist.github.com/andrey-str/0f9c7709cbf0c9c49ef9 */
-static void setElidedText(QLabel *label, QWidget *clipWidget, int padding, const QString &text)
-{
-   QFontMetrics metrix(label->font());
-   int width = clipWidget->width() - padding;
-   QString clippedText = metrix.elidedText(text, Qt::ElideRight, width);
-   label->setText(clippedText);
-}
-
 GridItem::GridItem() :
    QObject()
    ,widget(NULL)
@@ -586,6 +559,10 @@ MainWindow::~MainWindow()
    removeGridItems();
 }
 
+double MainWindow::lerp(double x, double y, double a, double b, double d) {
+  return a + (b - a) * ((double)(d - x) / (double)(y - x));
+}
+
 void MainWindow::onShaderParamsDialogResized(QSize size)
 {
    QVariant scrollAreaVariant = m_shaderParamsDialog->property("scrollArea");
@@ -949,24 +926,6 @@ void MainWindow::onListViewClicked()
    onCurrentListItemChanged(m_listWidget->currentItem(), NULL);
 }
 
-inline void MainWindow::calcGridItemSize(GridItem *item, int zoomValue)
-{
-   int newSize = 0;
-   QLabel *label = NULL;
-
-   if (zoomValue < 50)
-      newSize = expScale(lerp(0, 49, 25, 49, zoomValue) / 50.0, 102, 256);
-   else
-      newSize = expScale(zoomValue / 100.0, 256, 1024);
-
-   item->widget->setFixedSize(QSize(newSize, newSize));
-
-   label = item->widget->findChild<QLabel*>("thumbnailQLabel");
-
-   if (label)
-      setElidedText(label, item->widget, item->widget->layout()->contentsMargins().left() + item->widget->layout()->spacing() + 2, item->labelText);
-}
-
 void MainWindow::onZoomValueChanged(int value)
 {
    int i;
diff --git a/ui/drivers/ui_qt.h b/ui/drivers/ui_qt.h
index 05972d13e2..418e1fb441 100644
--- a/ui/drivers/ui_qt.h
+++ b/ui/drivers/ui_qt.h
@@ -276,6 +276,7 @@ public:
    void addFilesToPlaylist(QStringList files);
    QString getCurrentPlaylistPath();
    QHash<QString, QString> getCurrentContentHash();
+   static double lerp(double x, double y, double a, double b, double d);
 
 signals:
    void thumbnailChanged(const QPixmap &pixmap);