diff --git a/src/kdefrontend/ui/dockwidgets/xyfitcurvedockgeneraltab.ui b/src/kdefrontend/ui/dockwidgets/xyfitcurvedockgeneraltab.ui
index 0117d7255..d7800f552 100644
--- a/src/kdefrontend/ui/dockwidgets/xyfitcurvedockgeneraltab.ui
+++ b/src/kdefrontend/ui/dockwidgets/xyfitcurvedockgeneraltab.ui
@@ -1,1149 +1,1206 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>XYFitCurveDockGeneralTab</class>
  <widget class="QWidget" name="XYFitCurveDockGeneralTab">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>591</width>
     <height>1238</height>
    </rect>
   </property>
+  <property name="toolTip">
+   <string>Source of y data</string>
+  </property>
   <property name="autoFillBackground">
    <bool>true</bool>
   </property>
   <layout class="QGridLayout" name="gridLayout_3">
    <item row="0" column="4" colspan="4">
     <widget class="QLineEdit" name="leName"/>
    </item>
    <item row="5" column="0" colspan="2">
     <widget class="QLabel" name="lDataSourceType">
+     <property name="toolTip">
+      <string>Type of data source</string>
+     </property>
      <property name="text">
       <string>Source:</string>
      </property>
     </widget>
    </item>
    <item row="11" column="4" colspan="4">
     <layout class="QHBoxLayout" name="hlXError">
      <item>
       <widget class="QComboBox" name="cbXWeight"/>
      </item>
      <item>
       <widget class="QLabel" name="lXErrorCol">
        <property name="enabled">
         <bool>false</bool>
        </property>
        <property name="sizePolicy">
         <sizepolicy hsizetype="Fixed" vsizetype="Preferred">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>col =</string>
        </property>
        <property name="alignment">
         <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
        </property>
       </widget>
      </item>
     </layout>
    </item>
    <item row="10" column="0">
     <widget class="QToolButton" name="lWeights">
      <property name="font">
       <font>
        <weight>75</weight>
        <bold>true</bold>
       </font>
      </property>
      <property name="toolTip">
       <string>How to weight the data points</string>
      </property>
      <property name="layoutDirection">
       <enum>Qt::LeftToRight</enum>
      </property>
      <property name="text">
       <string>Weights</string>
      </property>
      <property name="icon">
       <iconset theme="arrow-right">
        <normaloff>../../../../../../.designer/backup</normaloff>../../../../../../.designer/backup</iconset>
      </property>
      <property name="checkable">
       <bool>true</bool>
      </property>
      <property name="toolButtonStyle">
       <enum>Qt::ToolButtonTextBesideIcon</enum>
      </property>
      <property name="autoRaise">
       <bool>true</bool>
      </property>
     </widget>
    </item>
    <item row="24" column="4" rowspan="2">
     <widget class="QFrame" name="frame">
      <property name="frameShape">
       <enum>QFrame::NoFrame</enum>
      </property>
      <property name="frameShadow">
       <enum>QFrame::Raised</enum>
      </property>
      <layout class="QGridLayout" name="gridLayout_2">
       <property name="margin">
        <number>0</number>
       </property>
      </layout>
     </widget>
    </item>
    <item row="27" column="0">
     <widget class="QFrame" name="frame_2">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Minimum" vsizetype="Minimum">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="minimumSize">
       <size>
        <width>0</width>
        <height>33</height>
       </size>
      </property>
      <property name="frameShape">
       <enum>QFrame::NoFrame</enum>
      </property>
      <property name="frameShadow">
       <enum>QFrame::Plain</enum>
      </property>
      <property name="lineWidth">
       <number>0</number>
      </property>
      <widget class="QToolButton" name="lResults">
       <property name="geometry">
        <rect>
         <x>0</x>
         <y>0</y>
         <width>90</width>
         <height>33</height>
        </rect>
       </property>
       <property name="sizePolicy">
        <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="font">
        <font>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="toolTip">
        <string>Fit results</string>
       </property>
       <property name="text">
        <string>Results:</string>
       </property>
       <property name="icon">
        <iconset theme="arrow-down">
         <normaloff/>
        </iconset>
       </property>
       <property name="checkable">
        <bool>true</bool>
       </property>
       <property name="checked">
        <bool>true</bool>
       </property>
       <property name="toolButtonStyle">
        <enum>Qt::ToolButtonTextBesideIcon</enum>
       </property>
       <property name="autoRaise">
        <bool>true</bool>
       </property>
      </widget>
     </widget>
    </item>
    <item row="32" column="4" colspan="3">
     <spacer name="horizontalSpacer_2">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>97</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="18" column="0">
     <widget class="QLabel" name="lEquation">
+     <property name="toolTip">
+      <string>Function of fit model</string>
+     </property>
      <property name="text">
       <string>f(x) =</string>
      </property>
     </widget>
    </item>
    <item row="8" column="0" colspan="2">
     <widget class="QLabel" name="lYColumn">
+     <property name="toolTip">
+      <string>Source of y data</string>
+     </property>
      <property name="text">
       <string>y-Data:</string>
      </property>
     </widget>
    </item>
    <item row="34" column="0" colspan="2">
     <widget class="QCheckBox" name="chkVisible">
+     <property name="toolTip">
+      <string>Show fit curve</string>
+     </property>
      <property name="text">
       <string>Visible</string>
      </property>
     </widget>
    </item>
    <item row="18" column="4" colspan="4">
     <widget class="QFrame" name="frameEquation">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Minimum">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="maximumSize">
       <size>
        <width>16777215</width>
        <height>16777215</height>
       </size>
      </property>
      <property name="frameShape">
       <enum>QFrame::NoFrame</enum>
      </property>
      <property name="frameShadow">
       <enum>QFrame::Raised</enum>
      </property>
      <layout class="QGridLayout" name="gridLayout">
       <property name="margin">
        <number>0</number>
       </property>
       <property name="spacing">
        <number>0</number>
       </property>
       <item row="2" column="0">
        <widget class="QLabel" name="lFuncPic">
         <property name="text">
          <string/>
         </property>
        </widget>
       </item>
       <item row="0" column="0" rowspan="2">
        <widget class="ExpressionTextEdit" name="teEquation">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Expanding" vsizetype="Minimum">
           <horstretch>0</horstretch>
           <verstretch>0</verstretch>
          </sizepolicy>
         </property>
         <property name="maximumSize">
          <size>
           <width>16777215</width>
           <height>16777215</height>
          </size>
         </property>
        </widget>
       </item>
       <item row="0" column="1">
        <widget class="QToolButton" name="tbFunctions">
         <property name="toolTip">
          <string>Functions</string>
         </property>
+        <property name="whatsThis">
+         <string>Select predefined function</string>
+        </property>
         <property name="text">
          <string/>
         </property>
        </widget>
       </item>
       <item row="1" column="1">
        <widget class="QToolButton" name="tbConstants">
         <property name="toolTip">
          <string>Constants</string>
         </property>
+        <property name="whatsThis">
+         <string>Select predefined constants</string>
+        </property>
         <property name="text">
          <string/>
         </property>
        </widget>
       </item>
      </layout>
     </widget>
    </item>
    <item row="21" column="0" colspan="2">
     <widget class="QFrame" name="frame_3">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Minimum">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="minimumSize">
       <size>
        <width>120</width>
        <height>33</height>
       </size>
      </property>
      <property name="frameShape">
       <enum>QFrame::NoFrame</enum>
      </property>
      <property name="frameShadow">
       <enum>QFrame::Plain</enum>
      </property>
      <property name="lineWidth">
       <number>0</number>
      </property>
      <widget class="QToolButton" name="lParameters">
       <property name="geometry">
        <rect>
         <x>0</x>
         <y>0</y>
         <width>121</width>
         <height>33</height>
        </rect>
       </property>
       <property name="sizePolicy">
        <sizepolicy hsizetype="Fixed" vsizetype="Preferred">
         <horstretch>0</horstretch>
         <verstretch>0</verstretch>
        </sizepolicy>
       </property>
       <property name="minimumSize">
        <size>
         <width>0</width>
         <height>0</height>
        </size>
       </property>
       <property name="font">
        <font>
         <weight>75</weight>
         <bold>true</bold>
        </font>
       </property>
       <property name="toolTip">
        <string>Specify parameters and their properties</string>
       </property>
       <property name="text">
        <string>Parameters:</string>
       </property>
       <property name="icon">
        <iconset theme="arrow-down">
         <normaloff/>
        </iconset>
       </property>
       <property name="checkable">
        <bool>true</bool>
       </property>
       <property name="checked">
        <bool>true</bool>
       </property>
       <property name="toolButtonStyle">
        <enum>Qt::ToolButtonTextBesideIcon</enum>
       </property>
       <property name="autoRaise">
        <bool>true</bool>
       </property>
      </widget>
     </widget>
    </item>
    <item row="0" column="3">
     <spacer name="horizontalSpacer_5">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeType">
       <enum>QSizePolicy::Fixed</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>10</width>
        <height>23</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="9" column="0">
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeType">
       <enum>QSizePolicy::Fixed</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>10</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="33" column="0">
     <spacer name="verticalSpacerGeneral">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeType">
       <enum>QSizePolicy::Fixed</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>24</width>
        <height>10</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="22" column="0">
     <spacer name="verticalSpacer_2">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeType">
       <enum>QSizePolicy::Expanding</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>5</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="27" column="4" colspan="4">
     <layout class="QHBoxLayout" name="horizontalLayout_3">
      <item>
       <widget class="QTabWidget" name="twResults">
+       <property name="toolTip">
+        <string>Resulting fit parameter and properties</string>
+       </property>
        <property name="autoFillBackground">
         <bool>true</bool>
        </property>
        <property name="currentIndex">
         <number>0</number>
        </property>
        <widget class="QWidget" name="tab_3">
         <attribute name="title">
          <string>Parameters</string>
         </attribute>
         <layout class="QVBoxLayout" name="verticalLayout_3">
          <item>
           <widget class="QTableWidget" name="twParameters">
            <property name="alternatingRowColors">
             <bool>true</bool>
            </property>
            <property name="columnCount">
             <number>7</number>
            </property>
            <attribute name="horizontalHeaderCascadingSectionResizes">
             <bool>false</bool>
            </attribute>
            <attribute name="horizontalHeaderDefaultSectionSize">
             <number>75</number>
            </attribute>
            <attribute name="horizontalHeaderMinimumSectionSize">
             <number>15</number>
            </attribute>
            <attribute name="horizontalHeaderStretchLastSection">
             <bool>false</bool>
            </attribute>
            <attribute name="verticalHeaderVisible">
             <bool>false</bool>
            </attribute>
            <column/>
            <column/>
            <column/>
            <column/>
            <column/>
            <column/>
            <column/>
           </widget>
          </item>
         </layout>
        </widget>
        <widget class="QWidget" name="tab_4">
         <attribute name="title">
          <string>Goodness of fit</string>
         </attribute>
         <layout class="QHBoxLayout" name="horizontalLayout_4">
          <item>
           <widget class="QTableWidget" name="twGoodness">
            <property name="alternatingRowColors">
             <bool>true</bool>
            </property>
            <property name="rowCount">
             <number>11</number>
            </property>
            <property name="columnCount">
             <number>3</number>
            </property>
            <attribute name="horizontalHeaderVisible">
             <bool>false</bool>
            </attribute>
            <attribute name="horizontalHeaderCascadingSectionResizes">
             <bool>true</bool>
            </attribute>
            <attribute name="horizontalHeaderDefaultSectionSize">
             <number>200</number>
            </attribute>
            <attribute name="horizontalHeaderMinimumSectionSize">
             <number>50</number>
            </attribute>
            <attribute name="horizontalHeaderStretchLastSection">
             <bool>true</bool>
            </attribute>
            <attribute name="verticalHeaderVisible">
             <bool>false</bool>
            </attribute>
            <row/>
            <row/>
            <row/>
            <row/>
            <row/>
            <row/>
            <row/>
            <row/>
            <row/>
            <row/>
            <row/>
            <column/>
            <column/>
            <column/>
            <item row="0" column="0">
             <property name="text">
              <string>Sum of squared residuals</string>
             </property>
            </item>
            <item row="0" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="0" column="2">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="1" column="0">
             <property name="text">
              <string>Mean square error</string>
             </property>
            </item>
            <item row="1" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="1" column="2">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="2" column="0">
             <property name="text">
              <string>Root mean square error</string>
             </property>
            </item>
            <item row="2" column="1">
             <property name="text">
              <string>RMSE, SD</string>
             </property>
            </item>
            <item row="2" column="2">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="3" column="0">
             <property name="text">
              <string>Coefficient of determination</string>
             </property>
            </item>
            <item row="3" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="3" column="2">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="4" column="0">
             <property name="text">
              <string>Adj. coefficient of determ.</string>
             </property>
            </item>
            <item row="4" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="4" column="2">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="5" column="0">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="5" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="5" column="2">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="6" column="0">
             <property name="text">
              <string>F test</string>
             </property>
            </item>
            <item row="6" column="1">
             <property name="text">
              <string>F</string>
             </property>
            </item>
            <item row="6" column="2">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="7" column="0">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="7" column="1">
             <property name="text">
              <string>P &gt; F</string>
             </property>
            </item>
            <item row="7" column="2">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="8" column="0">
             <property name="text">
              <string>Mean absolute error</string>
             </property>
            </item>
            <item row="8" column="1">
             <property name="text">
              <string>MAE</string>
             </property>
            </item>
            <item row="8" column="2">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="9" column="0">
             <property name="text">
              <string>Akaike information criterion</string>
             </property>
            </item>
            <item row="9" column="1">
             <property name="text">
              <string>AIC</string>
             </property>
            </item>
            <item row="9" column="2">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="10" column="0">
             <property name="text">
              <string>Bayesian information criterion</string>
             </property>
            </item>
            <item row="10" column="1">
             <property name="text">
              <string>BIC</string>
             </property>
            </item>
            <item row="10" column="2">
             <property name="text">
              <string/>
             </property>
            </item>
           </widget>
          </item>
         </layout>
        </widget>
        <widget class="QWidget" name="tab">
         <attribute name="title">
          <string>Log</string>
         </attribute>
         <layout class="QVBoxLayout" name="verticalLayout_2">
          <item>
           <widget class="QTableWidget" name="twLog">
            <property name="alternatingRowColors">
             <bool>true</bool>
            </property>
            <property name="rowCount">
             <number>8</number>
            </property>
            <property name="columnCount">
             <number>2</number>
            </property>
            <attribute name="horizontalHeaderVisible">
             <bool>false</bool>
            </attribute>
            <attribute name="horizontalHeaderCascadingSectionResizes">
             <bool>true</bool>
            </attribute>
            <attribute name="horizontalHeaderDefaultSectionSize">
             <number>150</number>
            </attribute>
            <attribute name="horizontalHeaderStretchLastSection">
             <bool>true</bool>
            </attribute>
            <attribute name="verticalHeaderVisible">
             <bool>false</bool>
            </attribute>
            <attribute name="verticalHeaderCascadingSectionResizes">
             <bool>false</bool>
            </attribute>
            <row/>
            <row/>
            <row/>
            <row/>
            <row/>
            <row/>
            <row/>
            <row/>
            <column/>
            <column/>
            <item row="0" column="0">
             <property name="text">
              <string>Status</string>
             </property>
            </item>
            <item row="0" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="1" column="0">
             <property name="text">
              <string>Iterations</string>
             </property>
            </item>
            <item row="1" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="2" column="0">
             <property name="text">
              <string>Tolerance</string>
             </property>
            </item>
            <item row="2" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="3" column="0">
             <property name="text">
              <string>Calculation time</string>
             </property>
            </item>
            <item row="3" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="4" column="0">
             <property name="text">
              <string>Degrees of freedom</string>
             </property>
            </item>
            <item row="4" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="5" column="0">
             <property name="text">
              <string>Number of parameter</string>
             </property>
            </item>
            <item row="5" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="6" column="0">
             <property name="text">
              <string>X range</string>
             </property>
            </item>
            <item row="6" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
            <item row="7" column="0">
             <property name="text">
              <string>Iterations</string>
             </property>
            </item>
            <item row="7" column="1">
             <property name="text">
              <string/>
             </property>
            </item>
           </widget>
          </item>
         </layout>
        </widget>
       </widget>
      </item>
     </layout>
    </item>
    <item row="32" column="7">
     <widget class="QPushButton" name="pbRecalculate">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Minimum">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
+     <property name="toolTip">
+      <string>Run fit</string>
+     </property>
      <property name="text">
       <string>Recalculate</string>
      </property>
     </widget>
    </item>
    <item row="4" column="0" colspan="2">
     <widget class="QToolButton" name="lData">
      <property name="font">
       <font>
        <weight>75</weight>
        <bold>true</bold>
       </font>
      </property>
      <property name="toolTip">
       <string>Data to fit</string>
      </property>
      <property name="text">
       <string>Data</string>
      </property>
      <property name="icon">
       <iconset theme="arrow-down">
        <normaloff/>
       </iconset>
      </property>
      <property name="checkable">
       <bool>true</bool>
      </property>
      <property name="checked">
       <bool>true</bool>
      </property>
      <property name="toolButtonStyle">
       <enum>Qt::ToolButtonTextBesideIcon</enum>
      </property>
      <property name="autoRaise">
       <bool>true</bool>
      </property>
     </widget>
    </item>
    <item row="1" column="4" colspan="4">
     <widget class="QLineEdit" name="leComment"/>
    </item>
    <item row="12" column="4" colspan="4">
     <layout class="QHBoxLayout" name="hlYWeight">
      <item>
       <widget class="QComboBox" name="cbYWeight"/>
      </item>
      <item>
       <widget class="QLabel" name="lYErrorCol">
        <property name="enabled">
         <bool>false</bool>
        </property>
        <property name="sizePolicy">
         <sizepolicy hsizetype="Fixed" vsizetype="Preferred">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="text">
         <string>col =</string>
        </property>
        <property name="alignment">
         <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
        </property>
       </widget>
      </item>
     </layout>
    </item>
    <item row="15" column="4" colspan="4">
     <widget class="QComboBox" name="cbCategory"/>
    </item>
    <item row="16" column="0">
     <widget class="QLabel" name="lModel">
+     <property name="toolTip">
+      <string>Fit model type</string>
+     </property>
      <property name="text">
       <string>Model:</string>
      </property>
     </widget>
    </item>
    <item row="17" column="0">
     <widget class="QLabel" name="lDegree">
+     <property name="toolTip">
+      <string>Degree of fit model</string>
+     </property>
      <property name="text">
       <string>Degree:</string>
      </property>
     </widget>
    </item>
    <item row="0" column="0">
     <widget class="QLabel" name="lName">
+     <property name="toolTip">
+      <string>Name of the fit curve</string>
+     </property>
      <property name="text">
       <string>Name:</string>
      </property>
     </widget>
    </item>
    <item row="12" column="0">
     <widget class="QLabel" name="lYWeight">
+     <property name="toolTip">
+      <string>Weight for y data</string>
+     </property>
      <property name="text">
       <string>y-Weight:</string>
      </property>
     </widget>
    </item>
    <item row="16" column="4" colspan="4">
     <widget class="KComboBox" name="cbModel">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
     </widget>
    </item>
    <item row="3" column="0">
     <spacer name="verticalSpacer_3">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeType">
       <enum>QSizePolicy::Fixed</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>10</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="15" column="0">
     <widget class="QLabel" name="lCategory">
+     <property name="toolTip">
+      <string>Fit model category</string>
+     </property>
      <property name="text">
       <string>Category:</string>
      </property>
     </widget>
    </item>
    <item row="7" column="0" colspan="2">
     <widget class="QLabel" name="lXColumn">
+     <property name="toolTip">
+      <string>Source of x data</string>
+     </property>
      <property name="text">
       <string>x-Data:</string>
      </property>
     </widget>
    </item>
    <item row="19" column="0">
     <spacer name="verticalSpacer_6">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeType">
       <enum>QSizePolicy::Fixed</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>10</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="14" column="0">
     <widget class="QToolButton" name="lFit">
      <property name="font">
       <font>
        <weight>75</weight>
        <bold>true</bold>
       </font>
      </property>
      <property name="toolTip">
       <string>Function to fit and options</string>
      </property>
      <property name="autoFillBackground">
       <bool>false</bool>
      </property>
      <property name="styleSheet">
       <string notr="true"/>
      </property>
      <property name="text">
       <string>Fit</string>
      </property>
      <property name="icon">
       <iconset theme="arrow-down">
        <normaloff/>
       </iconset>
      </property>
      <property name="checkable">
       <bool>true</bool>
      </property>
      <property name="checked">
       <bool>true</bool>
      </property>
      <property name="toolButtonStyle">
       <enum>Qt::ToolButtonTextBesideIcon</enum>
      </property>
      <property name="autoRaise">
       <bool>true</bool>
      </property>
     </widget>
    </item>
    <item row="11" column="0">
     <widget class="QLabel" name="lXWeight">
+     <property name="toolTip">
+      <string>Weight for x data</string>
+     </property>
      <property name="text">
       <string>x-Weight:</string>
      </property>
     </widget>
    </item>
    <item row="1" column="0">
     <widget class="QLabel" name="lComment">
+     <property name="toolTip">
+      <string>Optional comment</string>
+     </property>
      <property name="text">
       <string>Comment:</string>
      </property>
     </widget>
    </item>
    <item row="5" column="4" colspan="4">
     <widget class="QComboBox" name="cbDataSourceType">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
     </widget>
    </item>
    <item row="6" column="0" colspan="2">
     <widget class="QLabel" name="lDataSourceCurve">
+     <property name="toolTip">
+      <string>Source curve</string>
+     </property>
      <property name="text">
       <string>Curve:</string>
      </property>
     </widget>
    </item>
    <item row="30" column="0" rowspan="2" colspan="8">
     <widget class="Line" name="line_2">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
     </widget>
    </item>
    <item row="17" column="4" colspan="4">
     <widget class="QSpinBox" name="sbDegree">
      <property name="minimum">
       <number>1</number>
      </property>
      <property name="maximum">
       <number>50</number>
      </property>
      <property name="value">
       <number>1</number>
      </property>
     </widget>
    </item>
    <item row="13" column="0">
     <spacer name="verticalSpacer_4">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
      </property>
      <property name="sizeType">
       <enum>QSizePolicy::Fixed</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>20</width>
        <height>10</height>
       </size>
      </property>
     </spacer>
    </item>
    <item row="14" column="7">
     <layout class="QHBoxLayout" name="horizontalLayout">
      <property name="spacing">
       <number>6</number>
      </property>
      <property name="sizeConstraint">
       <enum>QLayout::SetMinimumSize</enum>
      </property>
      <property name="leftMargin">
       <number>70</number>
      </property>
      <item>
       <widget class="QPushButton" name="pbOptions">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Preferred">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="toolTip">
         <string>Advanced fit options</string>
        </property>
+       <property name="whatsThis">
+        <string>Opens a dialog to change advanced fit options</string>
+       </property>
        <property name="layoutDirection">
         <enum>Qt::RightToLeft</enum>
        </property>
        <property name="icon">
         <iconset theme="configure">
          <normaloff/>
         </iconset>
        </property>
       </widget>
      </item>
     </layout>
    </item>
    <item row="14" column="6">
     <spacer name="horizontalSpacer">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="sizeType">
       <enum>QSizePolicy::Expanding</enum>
      </property>
      <property name="sizeHint" stdset="0">
       <size>
        <width>41</width>
        <height>20</height>
       </size>
      </property>
     </spacer>
    </item>
   </layout>
  </widget>
  <customwidgets>
   <customwidget>
    <class>KComboBox</class>
    <extends>QComboBox</extends>
    <header>kcombobox.h</header>
   </customwidget>
   <customwidget>
    <class>ExpressionTextEdit</class>
    <extends>QTextEdit</extends>
    <header>kdefrontend/widgets/ExpressionTextEdit.h</header>
   </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
 </ui>