diff --git a/Modules/QtWidgetsExt/src/QmitkTransferFunctionWidget.ui b/Modules/QtWidgetsExt/src/QmitkTransferFunctionWidget.ui
index ddfc7db000..b078eb4961 100755
--- a/Modules/QtWidgetsExt/src/QmitkTransferFunctionWidget.ui
+++ b/Modules/QtWidgetsExt/src/QmitkTransferFunctionWidget.ui
@@ -1,557 +1,557 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>QmitkTransferFunctionWidget</class>
  <widget class="QWidget" name="QmitkTransferFunctionWidget">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>300</width>
     <height>542</height>
    </rect>
   </property>
   <property name="sizePolicy">
    <sizepolicy hsizetype="Expanding" vsizetype="MinimumExpanding">
     <horstretch>1</horstretch>
     <verstretch>1</verstretch>
    </sizepolicy>
   </property>
   <property name="windowTitle">
    <string>Form</string>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <property name="leftMargin">
     <number>0</number>
    </property>
    <property name="topMargin">
     <number>0</number>
    </property>
    <property name="rightMargin">
     <number>0</number>
    </property>
    <property name="bottomMargin">
     <number>0</number>
    </property>
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
       <widget class="ctkDoubleRangeSlider" name="m_RangeSlider">
        <property name="toolTip">
         <string>Change transfer function window range.</string>
        </property>
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="m_RangeSliderReset">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Maximum" vsizetype="Fixed">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="maximumSize">
         <size>
          <width>48</width>
          <height>16777215</height>
         </size>
        </property>
        <property name="toolTip">
         <string>Resets range to histogram minimum and maximum.</string>
        </property>
        <property name="text">
         <string>Reset</string>
        </property>
       </widget>
      </item>
     </layout>
    </item>
    <item>
     <widget class="QWidget" name="m_ScalarOpacityWidget" native="true">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
        <horstretch>0</horstretch>
        <verstretch>3</verstretch>
       </sizepolicy>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout_2">
       <property name="leftMargin">
        <number>0</number>
       </property>
       <property name="topMargin">
        <number>0</number>
       </property>
       <property name="rightMargin">
        <number>0</number>
       </property>
       <property name="bottomMargin">
        <number>0</number>
       </property>
       <item>
        <widget class="QmitkPiecewiseFunctionCanvas" name="m_ScalarOpacityFunctionCanvas" native="true">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
           <horstretch>0</horstretch>
           <verstretch>1</verstretch>
          </sizepolicy>
         </property>
         <property name="minimumSize">
          <size>
           <width>0</width>
           <height>64</height>
          </size>
         </property>
         <property name="font">
          <font/>
         </property>
         <property name="toolTip">
          <string>Left-click to select a point or add a new point.
 Hold left mouse button to move selected point.
 Click right mouse button to delete a point.</string>
         </property>
        </widget>
       </item>
       <item>
        <layout class="QHBoxLayout">
         <item>
          <widget class="QLineEdit" name="m_XEditScalarOpacity">
           <property name="enabled">
            <bool>true</bool>
           </property>
           <property name="sizePolicy">
            <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="minimumSize">
            <size>
             <width>64</width>
             <height>0</height>
            </size>
           </property>
           <property name="maximumSize">
            <size>
             <width>64</width>
             <height>16777215</height>
            </size>
           </property>
           <property name="toolTip">
            <string>Edit x-coordinate (grayvalue) of currently selected point.</string>
           </property>
           <property name="text">
            <string/>
           </property>
           <property name="alignment">
            <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QLabel" name="m_textLabelX">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Minimum" vsizetype="Preferred">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="font">
            <font/>
           </property>
           <property name="toolTip">
            <string>Edit x-coordinate (grayvalue) of currently selected point.</string>
           </property>
           <property name="text">
            <string>Grayvalue</string>
           </property>
           <property name="wordWrap">
            <bool>false</bool>
           </property>
          </widget>
         </item>
         <item>
          <spacer name="horizontalSpacer_2">
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
           </property>
           <property name="sizeHint" stdset="0">
            <size>
             <width>40</width>
             <height>20</height>
            </size>
           </property>
          </spacer>
         </item>
         <item>
          <widget class="QLabel" name="m_textLabelY">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Minimum" vsizetype="Preferred">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="font">
            <font/>
           </property>
           <property name="toolTip">
            <string>Edit y-coordinate (opacity) of currently selected point.</string>
           </property>
           <property name="text">
            <string>Opacity</string>
           </property>
           <property name="alignment">
            <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
           </property>
           <property name="wordWrap">
            <bool>false</bool>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QLineEdit" name="m_YEditScalarOpacity">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="minimumSize">
            <size>
             <width>64</width>
             <height>0</height>
            </size>
           </property>
           <property name="maximumSize">
            <size>
             <width>64</width>
             <height>16777215</height>
            </size>
           </property>
           <property name="toolTip">
            <string>Edit y-coordinate (opacity) of currently selected point.</string>
           </property>
           <property name="text">
            <string/>
           </property>
           <property name="alignment">
            <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
           </property>
          </widget>
         </item>
        </layout>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <widget class="QWidget" name="m_ColorWidget" native="true">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout_3">
       <property name="leftMargin">
        <number>0</number>
       </property>
       <property name="topMargin">
        <number>0</number>
       </property>
       <property name="rightMargin">
        <number>0</number>
       </property>
       <property name="bottomMargin">
        <number>0</number>
       </property>
       <item>
        <widget class="QmitkColorTransferFunctionCanvas" name="m_ColorTransferFunctionCanvas" native="true">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
           <horstretch>0</horstretch>
           <verstretch>1</verstretch>
          </sizepolicy>
         </property>
         <property name="minimumSize">
          <size>
           <width>0</width>
           <height>48</height>
          </size>
         </property>
         <property name="font">
          <font/>
         </property>
         <property name="toolTip">
          <string>Left-click to select a point or add a new point.
 Hold left mouse button to move selected point.
 Click right mouse button to delete a point.
 Double-click left mouse button to change color of a point.</string>
         </property>
        </widget>
       </item>
       <item>
        <layout class="QHBoxLayout">
         <item>
          <widget class="QLineEdit" name="m_XEditColor">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="minimumSize">
            <size>
             <width>64</width>
             <height>0</height>
            </size>
           </property>
           <property name="maximumSize">
            <size>
             <width>64</width>
             <height>16777215</height>
            </size>
           </property>
           <property name="toolTip">
            <string>Edit x-coordinate (grayvalue) of currently selected point.</string>
           </property>
           <property name="text">
            <string/>
           </property>
           <property name="alignment">
            <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QLabel" name="m_textLabelX_3">
           <property name="font">
            <font/>
           </property>
           <property name="toolTip">
            <string>Edit x-coordinate (grayvalue) of currently selected point.</string>
           </property>
           <property name="text">
            <string>Grayvalue</string>
           </property>
           <property name="wordWrap">
            <bool>false</bool>
           </property>
          </widget>
         </item>
         <item>
          <spacer name="horizontalSpacer_4">
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
           </property>
           <property name="sizeHint" stdset="0">
            <size>
             <width>40</width>
             <height>20</height>
            </size>
           </property>
          </spacer>
         </item>
        </layout>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <widget class="QWidget" name="m_GradientOpacityWidget" native="true">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
        <horstretch>0</horstretch>
        <verstretch>2</verstretch>
       </sizepolicy>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout_4">
       <property name="leftMargin">
        <number>0</number>
       </property>
       <property name="topMargin">
        <number>0</number>
       </property>
       <property name="rightMargin">
        <number>0</number>
       </property>
       <property name="bottomMargin">
        <number>0</number>
       </property>
       <item>
        <widget class="QmitkPiecewiseFunctionCanvas" name="m_GradientOpacityCanvas" native="true">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
           <horstretch>0</horstretch>
           <verstretch>1</verstretch>
          </sizepolicy>
         </property>
         <property name="minimumSize">
          <size>
           <width>0</width>
           <height>64</height>
          </size>
         </property>
         <property name="font">
          <font/>
         </property>
         <property name="toolTip">
          <string>Left-click to select a point or add a new point.
 Hold left mouse button to move selected point.
 Click right mouse button to delete a point.</string>
         </property>
        </widget>
       </item>
       <item>
        <layout class="QHBoxLayout">
         <item>
          <widget class="QLineEdit" name="m_XEditGradientOpacity">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="minimumSize">
            <size>
             <width>64</width>
             <height>0</height>
            </size>
           </property>
           <property name="maximumSize">
            <size>
             <width>64</width>
             <height>16777215</height>
            </size>
           </property>
           <property name="toolTip">
            <string>Edit x-coordinate (grayvalue) of currently selected point.</string>
           </property>
           <property name="text">
            <string/>
           </property>
           <property name="alignment">
            <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QLabel" name="m_textLabelX_2">
           <property name="font">
            <font/>
           </property>
           <property name="toolTip">
            <string>Edit x-coordinate (grayvalue) of currently selected point.</string>
           </property>
           <property name="text">
            <string>Grayvalue</string>
           </property>
           <property name="wordWrap">
            <bool>false</bool>
           </property>
          </widget>
         </item>
         <item>
          <spacer name="horizontalSpacer">
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
           </property>
           <property name="sizeHint" stdset="0">
            <size>
             <width>40</width>
             <height>20</height>
            </size>
           </property>
          </spacer>
         </item>
         <item>
          <widget class="QLabel" name="m_textLabelY_2">
           <property name="font">
            <font/>
           </property>
           <property name="toolTip">
            <string>Edit y-coordinate (opacity) of currently selected point.</string>
           </property>
           <property name="text">
            <string>Opacity</string>
           </property>
           <property name="alignment">
            <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
           </property>
           <property name="wordWrap">
            <bool>false</bool>
           </property>
          </widget>
         </item>
         <item>
          <widget class="QLineEdit" name="m_YEditGradientOpacity">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="minimumSize">
            <size>
             <width>64</width>
             <height>0</height>
            </size>
           </property>
           <property name="maximumSize">
            <size>
             <width>64</width>
             <height>16777215</height>
            </size>
           </property>
           <property name="toolTip">
            <string>Edit y-coordinate (opacity) of currently selected point.</string>
           </property>
           <property name="text">
            <string/>
           </property>
           <property name="alignment">
            <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
           </property>
          </widget>
         </item>
        </layout>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>0</height>
       </size>
      </property>
     </spacer>
    </item>
   </layout>
  </widget>
  <customwidgets>
   <customwidget>
    <class>QmitkPiecewiseFunctionCanvas</class>
    <extends>QWidget</extends>
    <header>QmitkPiecewiseFunctionCanvas.h</header>
   </customwidget>
   <customwidget>
    <class>QmitkColorTransferFunctionCanvas</class>
    <extends>QWidget</extends>
    <header>QmitkColorTransferFunctionCanvas.h</header>
   </customwidget>
   <customwidget>
-   <class>ctkRangeSlider</class>
+   <class>ctkDoubleRangeSlider</class>
    <extends>QWidget</extends>
-   <header location="global">ctkRangeSlider.h</header>
+   <header location="global">ctkDoubleRangeSlider.h</header>
   </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
 </ui>