[FEATURE] New statistical summary dock widget

Can display summary statistics (eg mean, standard deviation, ...)
for a field or expression from a vector layer.

python/core/qgsstatisticalsummary.sip

@@ -69,6 +69,12 @@ class QgsStatisticalSummary
      */
     void calculate( const QList<double>& values );
 
+    /** Returns the value of a specified statistic
+     * @param stat statistic to return
+     * @returns calculated value of statistic
+     */
+    double statistic( Statistic stat ) const;
+
     /** Returns calculated count of values
      */
     int count() const;
@@ -151,6 +157,11 @@ class QgsStatisticalSummary
      */
     double interQuartileRange() const;
 
+    /** Returns the friendly display name for a statistic
+     * @param statistic statistic to return name for
+     */
+    static QString displayName( Statistic statistic );
+
 };
 
 QFlags<QgsStatisticalSummary::Statistic> operator|(QgsStatisticalSummary::Statistic f1, QFlags<QgsStatisticalSummary::Statistic> f2);

src/app/CMakeLists.txt

@@ -103,6 +103,7 @@ SET(QGIS_APP_SRCS
   qgsprojectproperties.cpp
   qgsrastercalcdialog.cpp
   qgsrasterlayerproperties.cpp
+  qgsstatisticalsummarydockwidget.cpp
   qgstextannotationdialog.cpp
   qgsshortcutsmanager.cpp
   qgsguivectorlayertools.h
@@ -248,6 +249,7 @@ SET (QGIS_APP_MOC_HDRS
   qgsrasterlayerproperties.h
   qgssnappingdialog.h
   qgssponsors.h
+  qgsstatisticalsummarydockwidget.h
   qgssvgannotationdialog.h
   qgstextannotationdialog.h
   qgstipgui.h

src/app/qgisapp.cpp

@@ -195,6 +195,7 @@
 #include "qgssinglebandgrayrenderer.h"
 #include "qgssnappingdialog.h"
 #include "qgssponsors.h"
+#include "qgsstatisticalsummarydockwidget.h"
 #include "qgssvgannotationitem.h"
 #include "qgstextannotationitem.h"
 #include "qgstipgui.h"
@@ -598,6 +599,10 @@ QgisApp::QgisApp( QSplashScreen *splash, bool restorePlugins, QWidget * parent,
   mAdvancedDigitizingDockWidget = new QgsAdvancedDigitizingDockWidget( mMapCanvas, this );
   mAdvancedDigitizingDockWidget->setObjectName( "AdvancedDigitizingTools" );
 
+  // Statistical Summary dock
+  mStatisticalSummaryDockWidget = new QgsStatisticalSummaryDockWidget( this );
+  mStatisticalSummaryDockWidget->setObjectName( "StatistalSummaryDockWidget" );
+
   mSnappingUtils = new QgsMapCanvasSnappingUtils( mMapCanvas, this );
   mMapCanvas->setSnappingUtils( mSnappingUtils );
   connect( QgsProject::instance(), SIGNAL( snapSettingsChanged() ), mSnappingUtils, SLOT( readConfigFromProject() ) );
@@ -642,6 +647,9 @@ QgisApp::QgisApp( QSplashScreen *splash, bool restorePlugins, QWidget * parent,
   addDockWidget( Qt::LeftDockWidgetArea, mAdvancedDigitizingDockWidget );
   mAdvancedDigitizingDockWidget->hide();
 
+  addDockWidget( Qt::LeftDockWidgetArea, mStatisticalSummaryDockWidget );
+  mStatisticalSummaryDockWidget->hide();
+
   QMainWindow::addDockWidget( Qt::BottomDockWidgetArea, mUserInputDockWidget );
   mUserInputDockWidget->setFloating( true );
 
@@ -1202,6 +1210,7 @@ void QgisApp::createActions()
   connect( mActionSvgAnnotation, SIGNAL( triggered() ), this, SLOT( addSvgAnnotation() ) );
   connect( mActionAnnotation, SIGNAL( triggered() ), this, SLOT( modifyAnnotation() ) );
   connect( mActionLabeling, SIGNAL( triggered() ), this, SLOT( labeling() ) );
+  connect( mActionStatisticalSummary, SIGNAL( triggered( ) ), this, SLOT( showStatisticsDockWidget() ) );
 
   // Layer Menu Items
 
@@ -10483,6 +10492,12 @@ void QgisApp::osmExportDialog()
   dlg.exec();
 }
 
+void QgisApp::showStatisticsDockWidget()
+{
+  mStatisticalSummaryDockWidget->show();
+  mStatisticalSummaryDockWidget->raise();
+}
+
 
 #ifdef HAVE_TOUCH
 bool QgisApp::gestureEvent( QGestureEvent *event )

src/app/qgisapp.h

@@ -76,6 +76,7 @@ class QgsBrowserDockWidget;
 class QgsAdvancedDigitizingDockWidget;
 class QgsSnappingDialog;
 class QgsGPSInformationWidget;
+class QgsStatisticalSummaryDockWidget;
 
 class QgsDecorationItem;
 
@@ -1226,6 +1227,10 @@ class APP_EXPORT QgisApp : public QMainWindow, private Ui::MainWindow
     /** Make the user feel dizzy */
     void dizzy();
 
+    /** Shows the statistical summary dock widget and brings it to the foreground
+     */
+    void showStatisticsDockWidget();
+
   signals:
     /** emitted when a key is pressed and we want non widget sublasses to be able
       to pick up on this (e.g. maplayer) */
@@ -1615,6 +1620,7 @@ class APP_EXPORT QgisApp : public QMainWindow, private Ui::MainWindow
     QgsBrowserDockWidget *mBrowserWidget2;
 
     QgsAdvancedDigitizingDockWidget *mAdvancedDigitizingDockWidget;
+    QgsStatisticalSummaryDockWidget* mStatisticalSummaryDockWidget;
 
     QgsSnappingDialog *mSnappingDialog;
 

src/app/qgsstatisticalsummarydockwidget.cpp

@@ -0,0 +1,206 @@
+/***************************************************************************
+    qgsstatisticalsummarydockwidget.cpp
+    -----------------------------------
+    begin                : May 2015
+    copyright            : (C) 2015 by Nyall Dawson
+    email                : nyall dot dawson at gmail dot com
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+#include "qgsstatisticalsummarydockwidget.h"
+#include "qgsstatisticalsummary.h"
+#include <QTableWidget>
+#include <QAction>
+#include <QSettings>
+
+QList< QgsStatisticalSummary::Statistic > QgsStatisticalSummaryDockWidget::mDisplayStats =
+  QList< QgsStatisticalSummary::Statistic > () << QgsStatisticalSummary::Count
+  << QgsStatisticalSummary::Sum
+  << QgsStatisticalSummary::Mean
+  << QgsStatisticalSummary::Median
+  << QgsStatisticalSummary::StDev
+  << QgsStatisticalSummary::StDevSample
+  << QgsStatisticalSummary::Min
+  << QgsStatisticalSummary::Max
+  << QgsStatisticalSummary::Range
+  << QgsStatisticalSummary::Minority
+  << QgsStatisticalSummary::Majority
+  << QgsStatisticalSummary::Variety
+  << QgsStatisticalSummary::FirstQuartile
+  << QgsStatisticalSummary::ThirdQuartile
+  << QgsStatisticalSummary::InterQuartileRange;
+
+#define MISSING_VALUES -1
+
+QgsStatisticalSummaryDockWidget::QgsStatisticalSummaryDockWidget( QWidget *parent )
+    : QDockWidget( parent )
+    , mLayer( 0 )
+{
+  setupUi( this );
+
+  mLayerComboBox->setFilters( QgsMapLayerProxyModel::VectorLayer );
+  mFieldExpressionWidget->setFilters( QgsFieldProxyModel::Numeric );
+  connect( mLayerComboBox, SIGNAL( layerChanged( QgsMapLayer* ) ), this, SLOT( layerChanged( QgsMapLayer* ) ) );
+  connect( mFieldExpressionWidget, SIGNAL( fieldChanged( QString ) ), this, SLOT( refreshStatistics() ) );
+  connect( mSelectedOnlyCheckBox, SIGNAL( toggled( bool ) ), this, SLOT( refreshStatistics() ) );
+  connect( mButtonRefresh, SIGNAL( clicked( bool ) ), this, SLOT( refreshStatistics() ) );
+
+  if ( mLayerComboBox->currentLayer() )
+  {
+    mFieldExpressionWidget->setLayer( mLayerComboBox->currentLayer() );
+  }
+
+  QSettings settings;
+  foreach ( QgsStatisticalSummary::Statistic stat, mDisplayStats )
+  {
+    QAction* action = new QAction( QgsStatisticalSummary::displayName( stat ), mOptionsToolButton );
+    action->setCheckable( true );
+    bool checked = settings.value( QString( "/StatisticalSummaryDock/checked_%1" ).arg( stat ), true ).toBool();
+    action->setChecked( checked );
+    action->setData( stat );
+    mStatsActions.insert( stat, action );
+    connect( action, SIGNAL( triggered( bool ) ), this, SLOT( statActionTriggered( bool ) ) );
+    mOptionsToolButton->addAction( action );
+  }
+
+  //count of null values statistic:
+  QAction* nullCountAction = new QAction( tr( "Missing (null) values" ), mOptionsToolButton );
+  nullCountAction->setCheckable( true );
+  bool checked = settings.value( QString( "/StatisticalSummaryDock/checked_missing_values" ), true ).toBool();
+  nullCountAction->setChecked( checked );
+  nullCountAction->setData( MISSING_VALUES );
+  mStatsActions.insert( MISSING_VALUES, nullCountAction );
+  connect( nullCountAction, SIGNAL( triggered( bool ) ), this, SLOT( statActionTriggered( bool ) ) );
+  mOptionsToolButton->addAction( nullCountAction );
+}
+
+QgsStatisticalSummaryDockWidget::~QgsStatisticalSummaryDockWidget()
+{
+
+}
+
+void QgsStatisticalSummaryDockWidget::refreshStatistics()
+{
+  if ( !mLayer || !mFieldExpressionWidget->isValidExpression() )
+  {
+    mStatisticsTable->setRowCount( 0 );
+    return;
+  }
+
+  QString sourceFieldExp = mFieldExpressionWidget->currentField();
+
+  bool ok;
+  bool selectedOnly = mSelectedOnlyCheckBox->isChecked();
+  int missingValues = 0;
+  QList< double > values = mLayer->getDoubleValues( sourceFieldExp, ok, selectedOnly, &missingValues );
+
+  if ( ! ok )
+  {
+    return;
+  }
+
+  QList< QgsStatisticalSummary::Statistic > statsToDisplay;
+  foreach ( QgsStatisticalSummary::Statistic stat, mDisplayStats )
+  {
+    if ( mStatsActions.value( stat )->isChecked() )
+      statsToDisplay << stat;
+  }
+
+  int extraRows = 0;
+  if ( mStatsActions.value( MISSING_VALUES )->isChecked() )
+    extraRows++;
+
+  QgsStatisticalSummary stats;
+  stats.setStatistics( QgsStatisticalSummary::All );
+  stats.calculate( values );
+
+  mStatisticsTable->setRowCount( statsToDisplay.count() + extraRows );
+  mStatisticsTable->setColumnCount( 2 );
+
+  int row = 0;
+  foreach ( QgsStatisticalSummary::Statistic stat, statsToDisplay )
+  {
+    QTableWidgetItem* nameItem = new QTableWidgetItem( QgsStatisticalSummary::displayName( stat ) );
+    nameItem->setToolTip( nameItem->text() );
+    nameItem->setFlags( Qt::ItemIsSelectable | Qt::ItemIsEnabled );
+    mStatisticsTable->setItem( row, 0, nameItem );
+
+    QTableWidgetItem* valueItem = new QTableWidgetItem();
+    if ( stats.count() != 0 )
+    {
+      valueItem->setText( QString::number( stats.statistic( stat ) ) );
+    }
+    valueItem->setToolTip( valueItem->text() );
+    valueItem->setFlags( Qt::ItemIsSelectable | Qt::ItemIsEnabled );
+    mStatisticsTable->setItem( row, 1, valueItem );
+
+    row++;
+  }
+
+  if ( mStatsActions.value( MISSING_VALUES )->isChecked() )
+  {
+    QTableWidgetItem* nameItem = new QTableWidgetItem( tr( "Missing (null) values" ) );
+    nameItem->setToolTip( nameItem->text() );
+    nameItem->setFlags( Qt::ItemIsSelectable | Qt::ItemIsEnabled );
+    mStatisticsTable->setItem( row, 0, nameItem );
+
+    QTableWidgetItem* valueItem = new QTableWidgetItem();
+    if ( stats.count() != 0 || missingValues != 0 )
+    {
+      valueItem->setText( QString::number( missingValues ) );
+    }
+    valueItem->setToolTip( valueItem->text() );
+    valueItem->setFlags( Qt::ItemIsSelectable | Qt::ItemIsEnabled );
+    mStatisticsTable->setItem( row, 1, valueItem );
+    row++;
+  }
+}
+
+void QgsStatisticalSummaryDockWidget::layerChanged( QgsMapLayer *layer )
+{
+  QgsVectorLayer* newLayer = dynamic_cast< QgsVectorLayer* >( layer );
+  if ( mLayer && mLayer != newLayer )
+  {
+    disconnect( mLayer, SIGNAL( selectionChanged() ), this, SLOT( refreshStatistics() ) );
+  }
+
+  mLayer = newLayer;
+
+  if ( mLayer )
+  {
+    connect( mLayer, SIGNAL( selectionChanged() ), this, SLOT( refreshStatistics() ) );
+  }
+
+  mFieldExpressionWidget->setLayer( mLayer );
+
+  if ( mFieldExpressionWidget->currentField().isEmpty() )
+  {
+    mStatisticsTable->setRowCount( 0 );
+  }
+  else
+  {
+    refreshStatistics();
+  }
+}
+
+void QgsStatisticalSummaryDockWidget::statActionTriggered( bool checked )
+{
+  refreshStatistics();
+  QAction* action = dynamic_cast<QAction*>( sender() );
+  int stat = action->data().toInt();
+
+  QSettings settings;
+  if ( stat >= 0 )
+  {
+    settings.setValue( QString( "/StatisticalSummaryDock/checked_%1" ).arg( stat ), checked );
+  }
+  else if ( stat == MISSING_VALUES )
+  {
+    settings.setValue( QString( "/StatisticalSummaryDock/checked_missing_values" ).arg( stat ), checked );
+  }
+}

src/app/qgsstatisticalsummarydockwidget.h

@@ -0,0 +1,60 @@
+/***************************************************************************
+    qgsstatisticalsummarydockwidget.h
+    ---------------------------------
+    begin                : May 2015
+    copyright            : (C) 2015 by Nyall Dawson
+    email                : nyall dot dawson at gmail dot com
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+#ifndef QGSSTATISTICALSUMMARYDOCKWIDGET_H
+#define QGSSTATISTICALSUMMARYDOCKWIDGET_H
+
+#include <QDockWidget>
+#include <QMap>
+#include "ui_qgsstatisticalsummarybase.h"
+
+#include "qgsstatisticalsummary.h"
+
+class QgsBrowserModel;
+class QModelIndex;
+class QgsDockBrowserTreeView;
+class QgsLayerItem;
+class QgsDataItem;
+class QgsBrowserTreeFilterProxyModel;
+
+/**A dock widget which displays a statistical summary of the values in a field or expression
+ */
+class APP_EXPORT QgsStatisticalSummaryDockWidget : public QDockWidget, private Ui::QgsStatisticalSummaryWidgetBase
+{
+    Q_OBJECT
+
+  public:
+    QgsStatisticalSummaryDockWidget( QWidget *parent = 0 );
+    ~QgsStatisticalSummaryDockWidget();
+
+  public slots:
+
+    /**Recalculates the displayed statistics
+     */
+    void refreshStatistics();
+
+  private slots:
+
+    void layerChanged( QgsMapLayer* layer );
+    void statActionTriggered( bool checked );
+
+  private:
+
+    QgsVectorLayer* mLayer;
+
+    QMap< int, QAction* > mStatsActions;
+    static QList< QgsStatisticalSummary::Statistic > mDisplayStats;
+};
+
+#endif // QGSSTATISTICALSUMMARYDOCKWIDGET_H

src/core/qgsstatisticalsummary.cpp

@@ -16,7 +16,7 @@
 #include "qgsstatisticalsummary.h"
 #include <limits>
 #include <qmath.h>
-
+#include <QString>
 
 QgsStatisticalSummary::QgsStatisticalSummary( Statistics stats )
     : mStatistics( stats )
@@ -175,3 +175,83 @@ void QgsStatisticalSummary::calculate( const QList<double> &values )
 
 }
 
+double QgsStatisticalSummary::statistic( QgsStatisticalSummary::Statistic stat ) const
+{
+  switch ( stat )
+  {
+    case Count:
+      return mCount;
+    case Sum:
+      return mSum;
+    case Mean:
+      return mMean;
+    case Median:
+      return mMedian;
+    case StDev:
+      return mStdev;
+    case StDevSample:
+      return mSampleStdev;
+    case Min:
+      return mMin;
+    case Max:
+      return mMax;
+    case Range:
+      return mMax - mMin;
+    case Minority:
+      return mMinority;
+    case Majority:
+      return mMajority;
+    case Variety:
+      return mValueCount.count();
+    case FirstQuartile:
+      return mFirstQuartile;
+    case ThirdQuartile:
+      return mThirdQuartile;
+    case InterQuartileRange:
+      return mThirdQuartile - mFirstQuartile;
+    case All:
+      return 0;
+  }
+  return 0;
+}
+
+QString QgsStatisticalSummary::displayName( QgsStatisticalSummary::Statistic statistic )
+{
+  switch ( statistic )
+  {
+    case Count:
+      return QT_TR_NOOP( "Count" );
+    case Sum:
+      return QT_TR_NOOP( "Sum" );
+    case Mean:
+      return QT_TR_NOOP( "Mean" );
+    case Median:
+      return QT_TR_NOOP( "Median" );
+    case StDev:
+      return QT_TR_NOOP( "St dev (pop)" );
+    case StDevSample:
+      return QT_TR_NOOP( "St dev (sample)" );
+    case Min:
+      return QT_TR_NOOP( "Minimum" );
+    case Max:
+      return QT_TR_NOOP( "Maximum" );
+    case Range:
+      return QT_TR_NOOP( "Range" );
+    case Minority:
+      return QT_TR_NOOP( "Minority" );
+    case Majority:
+      return QT_TR_NOOP( "Majority" );
+    case Variety:
+      return QT_TR_NOOP( "Variety" );
+    case FirstQuartile:
+      return QT_TR_NOOP( "Q1" );
+    case ThirdQuartile:
+      return QT_TR_NOOP( "Q3" );
+    case InterQuartileRange:
+      return QT_TR_NOOP( "IQR" );
+    case All:
+      return QString();
+  }
+  return QString();
+}
+

src/core/qgsstatisticalsummary.h

@@ -85,6 +85,12 @@ class CORE_EXPORT QgsStatisticalSummary
      */
     void calculate( const QList<double>& values );
 
+    /** Returns the value of a specified statistic
+     * @param stat statistic to return
+     * @returns calculated value of statistic
+     */
+    double statistic( Statistic stat ) const;
+
     /** Returns calculated count of values
      */
     int count() const { return mCount; }
@@ -167,6 +173,11 @@ class CORE_EXPORT QgsStatisticalSummary
      */
     double interQuartileRange() const { return mThirdQuartile - mFirstQuartile; }
 
+    /** Returns the friendly display name for a statistic
+     * @param statistic statistic to return name for
+     */
+    static QString displayName( Statistic statistic );
+
   private:
 
     Statistics mStatistics;

src/ui/qgisapp.ui

@@ -105,6 +105,7 @@
     <addaction name="menuSelect"/>
     <addaction name="mActionIdentify"/>
     <addaction name="menuMeasure"/>
+    <addaction name="mActionStatisticalSummary"/>
     <addaction name="separator"/>
     <addaction name="mActionZoomFullExtent"/>
     <addaction name="mActionZoomToLayer"/>
@@ -410,6 +411,7 @@
    <addaction name="mActionSelectByExpression"/>
    <addaction name="mActionOpenTable"/>
    <addaction name="mActionOpenFieldCalc"/>
+   <addaction name="mActionStatisticalSummary"/>
    <addaction name="mActionMapTips"/>
    <addaction name="mActionNewBookmark"/>
    <addaction name="mActionShowBookmarks"/>
@@ -2283,6 +2285,21 @@ Acts on currently active editable layer</string>
     <string>New temporary scratch layer</string>
    </property>
   </action>
+  <action name="mActionStatisticalSummary">
+   <property name="checkable">
+    <bool>false</bool>
+   </property>
+   <property name="icon">
+    <iconset resource="../../images/images.qrc">
+     <normaloff>:/images/themes/default/mActionSum.png</normaloff>:/images/themes/default/mActionSum.png</iconset>
+   </property>
+   <property name="text">
+    <string>Statistical Summary</string>
+   </property>
+   <property name="toolTip">
+    <string>Show statistical summary</string>
+   </property>
+  </action>
  </widget>
  <resources>
   <include location="../../images/images.qrc"/>

src/ui/qgsstatisticalsummarybase.ui

@@ -0,0 +1,133 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>QgsStatisticalSummaryWidgetBase</class>
+ <widget class="QDockWidget" name="QgsStatisticalSummaryWidgetBase">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>291</width>
+    <height>376</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Statistics</string>
+  </property>
+  <widget class="QWidget" name="mContents">
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <property name="spacing">
+     <number>3</number>
+    </property>
+    <property name="leftMargin">
+     <number>3</number>
+    </property>
+    <property name="topMargin">
+     <number>3</number>
+    </property>
+    <property name="rightMargin">
+     <number>3</number>
+    </property>
+    <property name="bottomMargin">
+     <number>3</number>
+    </property>
+    <item>
+     <widget class="QgsMapLayerComboBox" name="mLayerComboBox"/>
+    </item>
+    <item>
+     <widget class="QgsFieldExpressionWidget" name="mFieldExpressionWidget" native="true">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
+        <horstretch>0</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+      <property name="maximumSize">
+       <size>
+        <width>16777215</width>
+        <height>16777215</height>
+       </size>
+      </property>
+     </widget>
+    </item>
+    <item>
+     <widget class="QTableWidget" name="mStatisticsTable">
+      <property name="alternatingRowColors">
+       <bool>true</bool>
+      </property>
+      <attribute name="horizontalHeaderVisible">
+       <bool>true</bool>
+      </attribute>
+      <attribute name="verticalHeaderVisible">
+       <bool>false</bool>
+      </attribute>
+      <column>
+       <property name="text">
+        <string>Statistic</string>
+       </property>
+      </column>
+      <column>
+       <property name="text">
+        <string>Value</string>
+       </property>
+      </column>
+     </widget>
+    </item>
+    <item>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="QCheckBox" name="mSelectedOnlyCheckBox">
+        <property name="text">
+         <string>Selected features only</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QToolButton" name="mButtonRefresh">
+        <property name="toolTip">
+         <string>Recalculate Statistics</string>
+        </property>
+        <property name="text">
+         <string>...</string>
+        </property>
+        <property name="icon">
+         <iconset resource="../../images/images.qrc">
+          <normaloff>:/images/themes/default/mActionDraw.svg</normaloff>:/images/themes/default/mActionDraw.svg</iconset>
+        </property>
+        <property name="autoRaise">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QToolButton" name="mOptionsToolButton">
+        <property name="text">
+         <string>...</string>
+        </property>
+        <property name="popupMode">
+         <enum>QToolButton::InstantPopup</enum>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+   </layout>
+  </widget>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>QgsFieldExpressionWidget</class>
+   <extends>QWidget</extends>
+   <header>qgsfieldexpressionwidget.h</header>
+   <container>1</container>
+  </customwidget>
+  <customwidget>
+   <class>QgsMapLayerComboBox</class>
+   <extends>QComboBox</extends>
+   <header>qgsmaplayercombobox.h</header>
+  </customwidget>
+ </customwidgets>
+ <resources>
+  <include location="../../images/images.qrc"/>
+ </resources>
+ <connections/>
+</ui>