Extended hover capability in DoubleSlider::Control

src/slic3r/GUI/DoubleSlider.hpp

@@ -44,6 +44,10 @@ enum FocusedItem {
     fiCogIcon,
     fiColorBand,
     fiActionIcon,
+    fiLowerThumb,
+    fiHigherThumb,
+    fiLowerThumbText,
+    fiHigherThumbText,
     fiTick
 };
 
@@ -360,6 +364,8 @@ private:
 
     wxRect      m_rect_lower_thumb;
     wxRect      m_rect_higher_thumb;
+    mutable wxRect m_rect_lower_thumb_text;
+    mutable wxRect m_rect_higher_thumb_text;
     wxRect      m_rect_tick_action;
     wxRect      m_rect_one_layer_icon;
     wxRect      m_rect_revert_icon;