use a scroll decorator delegate when not interactive

declarativeimports/plasmacomponents/qml/ScrollBar.qml

@@ -41,8 +41,8 @@ Item {
     property bool _isVertical: orientation == Qt.Vertical
     property bool _showButtons: stepSize != 0
 
-    implicitWidth: _isVertical ? 22 : 200
+    implicitWidth: _isVertical ? (interactive ? 22 : 12) : 200
-    implicitHeight: _isVertical ? 200 : 22
+    implicitHeight: _isVertical ? 200 : (interactive ? 22 : 12)
     // TODO: needs to define if there will be specific graphics for
     //     disabled scroll bars
     opacity: enabled ? 1.0 : 0.5
@@ -157,7 +157,7 @@ Item {
             position: _isVertical ? internalLoader.item.handle.y : internalLoader.item.handle.x
 
             onPositionChanged: {
-                if (internalLoader.item.mouseArea.pressed) {
+                if (internalLoader.item.mouseArea && internalLoader.item.mouseArea.pressed) {
                     return
                 }
 
@@ -169,6 +169,6 @@ Item {
             }
         }
 
-        source: "ScrollBarDelegate.qml"
+        source: interactive ? "ScrollBarDelegate.qml" : "ScrollDecoratorDelegate.qml"
     }
 }

declarativeimports/plasmacomponents/qml/ScrollDecoratorDelegate.qml

@@ -0,0 +1,80 @@
+/*
+*   Copyright (C) 2011 by Daker Fernandes Pinheiro <dakerfp@gmail.com>
+*   Copyright (C) 2011 Marco Martin <mart@kde.org>
+*
+*   This program is free software; you can redistribute it and/or modify
+*   it under the terms of the GNU Library General Public License as
+*   published by the Free Software Foundation; either version 2, or
+*   (at your option) any later version.
+*
+*   This program is distributed in the hope that it will be useful,
+*   but WITHOUT ANY WARRANTY; without even the implied warranty of
+*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*   GNU General Public License for more details
+*
+*   You should have received a copy of the GNU Library General Public
+*   License along with this program; if not, write to the
+*   Free Software Foundation, Inc.,
+*   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*/
+
+import QtQuick 1.1
+import org.kde.plasma.core 0.1 as PlasmaCore
+
+
+PlasmaCore.FrameSvgItem {
+    id: background
+    anchors.fill: parent
+    imagePath:"widgets/scrollbar"
+    prefix: _isVertical ? "background-vertical" : "background-horizontal"
+
+    opacity: 0
+    Behavior on opacity {
+        NumberAnimation {
+            duration: 250
+            easing.type: Easing.OutQuad
+        }
+    }
+
+    property Item handle: handle
+
+    property Item contents: contents
+    Item {
+        id: contents
+        anchors.fill: parent
+
+        PlasmaCore.FrameSvgItem {
+            id: handle
+            imagePath:"widgets/scrollbar"
+            prefix: "slider"
+
+            property int length: _isVertical? flickableItem.visibleArea.heightRatio * parent.height :  flickableItem.visibleArea.widthRatio * parent.width
+
+            width: _isVertical ? parent.width : length
+            height: _isVertical ? length : parent.height
+        }
+    }
+
+    property MouseArea mouseArea: null
+
+    Connections {
+        target: flickableItem
+        onMovingChanged: {
+            if (flickableItem.moving) {
+                background.opacity = 1
+            } else {
+                opacityTimer.restart()
+            }
+        }
+    }
+    Timer {
+        id: opacityTimer
+        interval: 500
+        repeat: false
+        running: false
+        onTriggered: {
+            background.opacity = 0
+        }
+    }
+}
+