Index: sources/gui/qml/components/RangeSlider.qml
===================================================================
diff -u -r265ce7409a0ea99a4ae059f5ce7978c9cdb10631 -rffc5c4365ddfc2eaa178708e91f337a684b793a5
--- sources/gui/qml/components/RangeSlider.qml	(.../RangeSlider.qml)	(revision 265ce7409a0ea99a4ae059f5ce7978c9cdb10631)
+++ sources/gui/qml/components/RangeSlider.qml	(.../RangeSlider.qml)	(revision ffc5c4365ddfc2eaa178708e91f337a684b793a5)
@@ -46,10 +46,10 @@
     property bool   minVerticalEdgeVisible: true
 
     property int    gapValue    : 0                                 ///< the gap between minValue and maxValue so the minValue shall always be gap value less than maxValue and vise versa.
-    property real   minValueLowerBound    : _root.minimum           ///< min value cannot be lower  than this value
-    property real   minValueUpperBound    : _root.maximum           ///< min value cannot be higher than this value
-    property real   maxValueLowerBound    : _root.minimum           ///< max value cannot be lower  than this value
-    property real   maxValueUpperBound    : _root.maximum           ///< max value cannot be higher than this value
+    property real   minValueLowerBound    : 0
+    property real   minValueUpperBound    : 0
+    property real   maxValueLowerBound    : 0
+    property real   maxValueUpperBound    : 0
 
 
     property int    curHandler  : RangeSlider.HandlerOption.None    ///< current active slider handler
@@ -86,29 +86,6 @@
     minimum         : 0
     maximum         : 0
 
-    /// real-time bound change should effect the current set value
-    onMinimumChanged: {
-        if ( minValueLowerBound < minimum ) { minValueLowerBound = minimum }
-        if ( maxValueLowerBound < minimum ) { maxValueLowerBound = minimum }
-    }
-    onMaximumChanged: {
-        if ( minValueUpperBound > maximum ) { minValueUpperBound = maximum }
-        if ( maxValueUpperBound > maximum ) { maxValueUpperBound = maximum }
-    }
-
-    onMinValueLowerBoundChanged: {
-        if ( minValue < minValueLowerBound ) { minValue = minValueLowerBound }
-    }
-    onMinValueUpperBoundChanged: {
-        if ( minValue > minValueUpperBound ) { minValue = minValueUpperBound }
-    }
-    onMaxValueLowerBoundChanged: {
-        if ( maxValue < maxValueLowerBound ) { maxValue = maxValueLowerBound }
-    }
-    onMaxValueUpperBoundChanged: {
-        if ( maxValue > maxValueUpperBound ) { maxValue = maxValueUpperBound }
-    }
-
     /// Lable of the minimum of range
     minText {
         visible          : true