diff --git a/app/gui/oven_control/slider.cpp b/app/gui/oven_control/slider.cpp
index 7bbab93..4bc62de 100644
--- a/app/gui/oven_control/slider.cpp
+++ b/app/gui/oven_control/slider.cpp
@@ -193,7 +193,7 @@ void Slider::mouseReleaseEvent(QMouseEvent */*event*/)
 void Slider::paintEvent(QPaintEvent */*event*/)
 {
     QPainter painter(this);
-    painter.drawPixmap(groovePoint, groove);
+    painter.drawPixmap(grooveLeftTop, groove);
 
     QPen tickPen(QColor(71, 71, 71));
     tickPen.setWidth(2);
@@ -202,36 +202,36 @@ void Slider::paintEvent(QPaintEvent */*event*/)
     if (tickInterval)
         for (int tick = minimum_; tick <= maximum_; tick += tickInterval)
         {
-            int x = subPoint.x() + calcSubLength(tick);
-            painter.drawLine(x, groovePoint.y() + 22, x, groovePoint.y() + 28);
+            int x = subLeftTop.x() + calcSubLength(tick);
+            painter.drawLine(x, grooveLeftTop.y() + 22, x, grooveLeftTop.y() + 28);
         }
     else
         foreach (int tick, ticks)
         {
-            int x = subPoint.x() + calcSubLength(tick);
-            painter.drawLine(x, groovePoint.y() + 22, x, groovePoint.y() + 28);
+            int x = subLeftTop.x() + calcSubLength(tick);
+            painter.drawLine(x, grooveLeftTop.y() + 22, x, grooveLeftTop.y() + 28);
         }
 
     if (bigTickInterval)
         for (int tick = minimum_; tick <= maximum_; tick += bigTickInterval)
         {
-            int x = subPoint.x() + calcSubLength(tick);
-            painter.drawLine(x, groovePoint.y() + 22, x, groovePoint.y() + 33);
+            int x = subLeftTop.x() + calcSubLength(tick);
+            painter.drawLine(x, grooveLeftTop.y() + 22, x, grooveLeftTop.y() + 33);
         }
     else
         foreach (int tick, bigTicks)
         {
-            int x = subPoint.x() + calcSubLength(tick);
-            painter.drawLine(x, groovePoint.y() + 22, x, groovePoint.y() + 33);
+            int x = subLeftTop.x() + calcSubLength(tick);
+            painter.drawLine(x, grooveLeftTop.y() + 22, x, grooveLeftTop.y() + 33);
         }
 
     if (subVisible_)
     {
         int subLength = calcSubLength(sliderPosition_);
         if (subLength > 0)
-            painter.drawPixmap(subPoint, sub, QRect(0, 0, subLength, sub.height()));
+            painter.drawPixmap(subLeftTop, sub, QRect(0, 0, subLength, sub.height()));
 
-        QPoint handlePoint(subPoint.x() + subLength - handle.width() / 2, (height() - handle.height()) / 2);
+        QPoint handlePoint(subLeftTop.x() + subLength - handle.width() / 2, (height() - handle.height()) / 2);
         painter.drawPixmap(handlePoint, handle);
     }
 }
@@ -258,8 +258,8 @@ void Slider::updatePixmapPosition()
     minSliderX = (width() - sub.width()) / 2;
     maxSliderX = width() - minSliderX;
 
-    groovePoint = QPoint((width() - groove.width()) / 2, (height() - groove.height()) / 2);
-    subPoint = QPoint((width() - sub.width()) / 2, (height() - sub.height()) / 2);
+    grooveLeftTop = QPoint((width() - groove.width()) / 2, (height() - groove.height()) / 2);
+    subLeftTop = QPoint((width() - sub.width()) / 2, (height() - sub.height()) / 2);
 }
 
 void Slider::setValue(int value)