Index: sources/gui/qml/compounds/ValueAdjuster.qml
===================================================================
diff -u -r5d7e02ed6481cc6ae1c944a5ba1687766f7f8375 -r10d95daf091fedda008906727088648f66ae5bac
--- sources/gui/qml/compounds/ValueAdjuster.qml	(.../ValueAdjuster.qml)	(revision 5d7e02ed6481cc6ae1c944a5ba1687766f7f8375)
+++ sources/gui/qml/compounds/ValueAdjuster.qml	(.../ValueAdjuster.qml)	(revision 10d95daf091fedda008906727088648f66ae5bac)
@@ -26,10 +26,9 @@
     property real   value       : 0
     property real   defaultValue: 0
     property real   step        : 0
-    property real   actualValue : 0
     property bool   isActive    : false
     property bool   editable    : true
-    property bool   canOff : false
+    property bool   canOff      : false
     property bool   canRefresh  : false
 
     // fix floating-point precision issue
@@ -41,28 +40,38 @@
     readonly property bool canDecrement  : isActive ? canOff ? value > 0 :
                                                                value > minimum : true
 
+    signal didChange        (real vValue)
+    signal didActiveChange  (bool vState)
+
     onIsActiveChanged             : {
-        if ( canRefresh )   { canRefresh = false; return;               }
+        if ( canRefresh )   { canRefresh = false; return;   }
 
-        if ( isActive )     { _root.value = _root.defaultValue          }
+        if ( isActive )     { didChange(_root.defaultValue) }
     }
 
-    function refresh () { value = actualValue; canRefresh = true        }
+    function refresh()      { canRefresh    = true          }
 
-    function clear() { _root.isActive = false                           }
+    function clear()        { didActiveChange(false)        }
 
     function increment() {
-        if ( ! isActive )   { isActive = true; return;                      }
+        let tValue = value
+        if ( ! isActive )   { didActiveChange(true); return;                    }
 
-        if ( canOff )       { value = val < minVal ? minVal : val + stepVal }
-        else                { value += stepVal                              }
+        if ( canOff )       { tValue = val < minVal ? minVal : val + stepVal    }
+        else                { tValue += stepVal                                 }
+
+        didChange(tValue)
+
     }
 
-    function decrement() {
-        if ( ! isActive )   { isActive = true; return;                      }
+    function decrement(vValue) {
+        let tValue = value
+        if ( ! isActive )   { didActiveChange(true); return;            }
 
-        if ( canOff )       { value = val > minVal ? val - stepVal : 0      }
-        else                { value -= stepVal                              }
+        if ( canOff )       { tValue = val > minVal ? val - stepVal : 0 }
+        else                { tValue -= stepVal                         }
+
+        didChange(tValue)
     }
 
     Text { id: _text
@@ -122,7 +131,7 @@
             pressAndHoldInterval: 0
 
             onClicked: {
-                if ( _root.editable ) { isActive = true; focus = true }
+                if ( _root.editable ) { didActiveChange(true); focus = true }
 
                 _slider.opacity = 0
             }
@@ -134,7 +143,7 @@
             }
 
             onPressAndHold: {
-                if ( _root.editable ) { isActive = true; focus = true }
+                if ( _root.editable ) { didActiveChange(true); focus = true }
 
                 _sliderMouseArea.grabbed = true
             }
@@ -146,7 +155,8 @@
                     _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)
+//                    _root.value = stepped
                 }
             }
 
@@ -180,6 +190,7 @@
         visible                 : _root.editable
         iconImageSource         : enabled ? "qrc:/images/iArrowLeft" :
                                             "qrc:/images/iArrowLeftDisabled"
+//        onClicked               : didDecrement()
         onClicked               : decrement()
     }
 
@@ -194,6 +205,7 @@
         visible                 : _root.editable
         iconImageSource         : enabled ? "qrc:/images/iArrowRight" :
                                             "qrc:/images/iArrowRightDisabled"
+//        onClicked               : didIncrement()
         onClicked               : increment()
     }
 }