Index: sources/gui/qml/compounds/ValueAdjuster.qml
===================================================================
diff -u -rea4de12b2c7d6306a9cb89ff23eb95ccd25077a1 -r90f945668f1fff9ecb182b16ee33997cf515f52c
--- sources/gui/qml/compounds/ValueAdjuster.qml	(.../ValueAdjuster.qml)	(revision ea4de12b2c7d6306a9cb89ff23eb95ccd25077a1)
+++ sources/gui/qml/compounds/ValueAdjuster.qml	(.../ValueAdjuster.qml)	(revision 90f945668f1fff9ecb182b16ee33997cf515f52c)
@@ -24,48 +24,61 @@
     property real   minimum     : 0
     property real   maximum     : 0
     property real   value       : 0
-    property real  defaultValue : 0
+    property real   defaultValue: 0
     property real   step        : 0
-
-    property bool   active      : false
+    property bool   isActive    : false
     property bool   editable    : true
+    property bool   canOff      : false
+    property bool   canRefresh  : false
 
-    property bool canIncrement  : active ? value < maximum : true
-    property bool canDecrement  : active ? allowOff ? value > 0 :
-                                                      value > minimum : true
-
-    property bool allowOff      : false
-
     // fix floating-point precision issue
     readonly property real stepVal  : Math.round(step       * 100) / 100
     readonly property real minVal   : Math.round(minimum    * 100) / 100
     readonly property real val      : Math.round(value      * 100) / 100
 
-    onActiveChanged             : if ( active ) { _root.value = _root.defaultValue }
+    readonly property bool canIncrement  : isActive ? value  < maximum : true
+    readonly property bool canDecrement  : isActive ? canOff ? value > 0 :
+                                                               value > minimum : true
 
-    function clear() { _root.active = false }
+    signal didChange        (real vValue)
+    signal didActiveChange  (bool vState)
 
+    onIsActiveChanged             : {
+        if ( canRefresh )   { canRefresh = false; return;   }
+
+        if ( isActive )     { didChange(_root.defaultValue) }
+    }
+
+    function refresh()      { canRefresh    = true          }
+
+    function clear()        { didActiveChange(false)        }
+
     function increment() {
-        if ( ! active )     { active = true                                 }
-        else {
-            if ( allowOff ) { value = val < minVal ? minVal : val + stepVal }
-            else            { value += stepVal                              }
-        }
+        let tValue = value
+        if ( ! isActive )   { didActiveChange(true); return;                    }
+
+        if ( canOff )       { tValue = val < minVal ? minVal : val + stepVal    }
+        else                { tValue += stepVal                                 }
+
+        didChange(tValue)
+
     }
 
-    function decrement() {
-        if ( ! active )     { active = true                             }
-        else {
-            if ( allowOff ) { value = val > minVal ? val - stepVal : 0  }
-            else            { value -= stepVal                          }
-        }
+    function decrement(vValue) {
+        let tValue = value
+        if ( ! isActive )   { didActiveChange(true); return;            }
+
+        if ( canOff )       { tValue = val > minVal ? val - stepVal : 0 }
+        else                { tValue -= stepVal                         }
+
+        didChange(tValue)
     }
 
     Text { id: _text
         anchors.centerIn: parent
-        text            : _root.active ? _root.allowOff ? _root.value === 0 ?
-                                                              "OFF" :
-                                                              _root.value.toFixed( _root.decimal ) :
+        text            : _root.isActive ? _root.canOff ? _root.value === 0 ?
+                                                          "OFF" :
+                                                          _root.value.toFixed( _root.decimal ) :
                                         _root.value.toFixed( _root.decimal ) : Variables.emptyEntry
         color           : Colors.offWhite
         font.pixelSize  : Fonts.fontPixelValueControl
@@ -118,10 +131,7 @@
             pressAndHoldInterval: 0
 
             onClicked: {
-                if ( _root.editable ) {
-                    active  = true
-                    focus   = true
-                }
+                if ( _root.editable ) { didActiveChange(true); focus = true }
 
                 _slider.opacity = 0
             }
@@ -133,10 +143,7 @@
             }
 
             onPressAndHold: {
-                if ( _root.editable ) {
-                    active  = true
-                    focus   = true
-                }
+                if ( _root.editable ) { didActiveChange(true); focus = true }
 
                 _sliderMouseArea.grabbed = true
             }
@@ -148,7 +155,7 @@
                     _slider.pos = Math.max(0, Math.min(1, mouse.x / parent.width))
                     let raw =  _slider.from + _slider.pos * (_slider.to - _slider.from)
                     let stepped = Math.round((raw - _slider.from) / _root.step) * _root.step + _slider.from
-                    _root.value = stepped
+                    didChange(stepped)
                 }
             }