[mesh] Fixes time reference for mesh layer #32186 #33399 #31933 (#33410)

[FEATURE] [mesh] Load reference time from MDAL when available

Also adds combo box to let the user set the provider time unit. This is particularly useful when MDAL incorrectly recognised the time units in the raw dat format (for example format does nof follow spec and it is not possible to determine if time interval is in hours or days)

fix #32186 
fix #33399
fix #31933

python/core/auto_generated/mesh/qgsmeshdataprovider.sip.in

@@ -417,6 +417,7 @@ Constructs an empty metadata object
                                  double minimum,
                                  double maximum,
                                  int maximumVerticalLevels,
+                                 const QDateTime &referenceTime,
                                  const QMap<QString, QString> &extraOptions );
 %Docstring
 Constructs a valid metadata object
@@ -427,6 +428,7 @@ Constructs a valid metadata object
 :param minimum: minimum value (magnitude for vectors) present among all group's dataset values
 :param maximum: maximum value (magnitude for vectors) present among all group's dataset values
 :param maximumVerticalLevels: maximum number of vertical levels for 3d stacked meshes, 0 for 2d meshes
+:param referenceTime: reference time of the dataset group
 :param extraOptions: dataset's extra options stored by the provider. Usually contains the name, time value, time units, data file vendor, ...
 %End
 
@@ -471,6 +473,13 @@ Returns maximum scalar value/vector magnitude present for whole dataset group
 %Docstring
 Returns maximum number of vertical levels for 3d stacked meshes
 
+.. versionadded:: 3.12
+%End
+
+    QDateTime referenceTime() const;
+%Docstring
+Returns the reference time
+
 .. versionadded:: 3.12
 %End
 

python/core/auto_generated/mesh/qgsmeshtimesettings.sip.in

@@ -23,10 +23,20 @@ Represents a mesh time settings for mesh datasets
 #include "qgsmeshtimesettings.h"
 %End
   public:
+
+    enum TimeUnit
+    {
+      //! second unit
+      seconds,
+      //! minute unit
+      minutes,
+      //! hour unit
+      hours,
+      //! day unit
+      days
+    };
+
     QgsMeshTimeSettings();
-%Docstring
-Default constructor for relative time format and 0 offset
-%End
     QgsMeshTimeSettings( double relativeTimeOffsetHours, const QString &relativeTimeFormat );
 %Docstring
 Constructs relative time format settings with defined offset in hours
@@ -88,6 +98,20 @@ Returns format used for absolute time
     void setAbsoluteTimeFormat( const QString &absoluteTimeFormat );
 %Docstring
 Sets format used for absolute time
+%End
+
+    TimeUnit providerTimeUnit() const;
+%Docstring
+Returns the provider time unit
+
+.. versionadded:: 3.12
+%End
+
+    void setProviderTimeUnit( const TimeUnit &providerTimeUnit );
+%Docstring
+Sets the provider time unit
+
+.. versionadded:: 3.12
 %End
 
 };

src/app/mesh/qgsmeshrendereractivedatasetwidget.cpp

@@ -120,6 +120,7 @@ void QgsMeshRendererActiveDatasetWidget::setTimeRange()
 
   // update combobox
   mTimeComboBox->blockSignals( true );
+  int currentIndex = mTimeComboBox->currentIndex();
   mTimeComboBox->clear();
   if ( groupWithMaximumDatasets > -1 )
   {
@@ -131,8 +132,9 @@ void QgsMeshRendererActiveDatasetWidget::setTimeRange()
       mTimeComboBox->addItem( mMeshLayer->formatTime( time ), time );
     }
   }
+  mTimeComboBox->setCurrentIndex( currentIndex );
   mTimeComboBox->blockSignals( false );
-
+  updateMetadata();
   // enable/disable time controls depending on whether the data set is time varying
   enableTimeControls();
 }

src/app/mesh/qgsmeshtimeformatdialog.cpp

@@ -17,6 +17,7 @@
 #include "qgsmeshtimeformatdialog.h"
 #include "qgsgui.h"
 #include "qgsmeshtimesettings.h"
+#include "qgsmeshlayerutils.h"
 
 QgsMeshTimeFormatDialog::QgsMeshTimeFormatDialog( QgsMeshLayer *meshLayer, QWidget *parent, Qt::WindowFlags f )
   : QDialog( parent, f ),
@@ -30,14 +31,24 @@ QgsMeshTimeFormatDialog::QgsMeshTimeFormatDialog( QgsMeshLayer *meshLayer, QWidg
 
   loadSettings();
 
+  mReloadReferenceTimeButton->setEnabled( layerHasReferenceTime() );
+
   connect( mUseTimeComboBox, qgis::overload<int>::of( &QComboBox::currentIndexChanged ), this, &QgsMeshTimeFormatDialog::saveSettings );
-  connect( mReferenceDateTimeEdit, &QDateTimeEdit::timeChanged, this, &QgsMeshTimeFormatDialog::saveSettings );
+  connect( mReferenceDateTimeEdit, &QDateTimeEdit::dateTimeChanged, this, &QgsMeshTimeFormatDialog::saveSettings );
   connect( mAbsoluteTimeFormatComboBox, qgis::overload<int>::of( &QComboBox::currentIndexChanged ), this, &QgsMeshTimeFormatDialog::saveSettings );
   connect( mUseTimeComboBox, qgis::overload<int>::of( &QComboBox::currentIndexChanged ), this, &QgsMeshTimeFormatDialog::saveSettings );
   connect( mRelativeTimeFormatComboBox, qgis::overload<int>::of( &QComboBox::currentIndexChanged ), this, &QgsMeshTimeFormatDialog::saveSettings );
   connect( mOffsetHoursSpinBox, qgis::overload<double>::of( &QDoubleSpinBox::valueChanged ), this, &QgsMeshTimeFormatDialog::saveSettings );
   connect( mPlaybackIntervalSpinBox, qgis::overload<double>::of( &QDoubleSpinBox::valueChanged ), this, &QgsMeshTimeFormatDialog::saveSettings );
+  connect( mProviderTimeUnitComboBox, qgis::overload<int>::of( &QComboBox::currentIndexChanged ), this, &QgsMeshTimeFormatDialog::saveSettings );
 
+  connect( mReloadReferenceTimeButton, &QPushButton::clicked, this, &QgsMeshTimeFormatDialog::loadProviderReferenceTime );
+
+}
+
+void QgsMeshTimeFormatDialog::loadProviderReferenceTime()
+{
+  mReferenceDateTimeEdit->setDateTime( QgsMeshLayerUtils::firstReferenceTime( mLayer ) );
 }
 
 void QgsMeshTimeFormatDialog::loadSettings()
@@ -54,7 +65,12 @@ void QgsMeshTimeFormatDialog::loadSettings()
     mUseTimeComboBox->setCurrentIndex( 1 );
   }
 
-  mReferenceDateTimeEdit->setDateTime( settings.absoluteTimeReferenceTime() );
+  // Sets the reference time, if not valid, sets the current date + time 00:00:00
+  if ( settings.absoluteTimeReferenceTime().isValid() )
+    mReferenceDateTimeEdit->setDateTime( settings.absoluteTimeReferenceTime() );
+  else
+    mReferenceDateTimeEdit->setDateTime( QDateTime( QDate::currentDate(), QTime( 00, 00, 00 ) ) );
+
   mReferenceDateTimeEdit->setDisplayFormat( settings.absoluteTimeFormat() );
 
   int index = mAbsoluteTimeFormatComboBox->findText( settings.absoluteTimeFormat() );
@@ -75,6 +91,8 @@ void QgsMeshTimeFormatDialog::loadSettings()
 
   mOffsetHoursSpinBox->setValue( settings.relativeTimeOffsetHours() );
   mPlaybackIntervalSpinBox->setValue( settings.datasetPlaybackInterval() );
+
+  mProviderTimeUnitComboBox->setCurrentIndex( settings.providerTimeUnit() );
 }
 
 void QgsMeshTimeFormatDialog::saveSettings()
@@ -86,6 +104,7 @@ void QgsMeshTimeFormatDialog::saveSettings()
   settings.setRelativeTimeOffsetHours( mOffsetHoursSpinBox->value() );
   settings.setRelativeTimeFormat( mRelativeTimeFormatComboBox->currentText() );
   settings.setDatasetPlaybackInterval( mPlaybackIntervalSpinBox->value() );
+  settings.setProviderTimeUnit( static_cast<QgsMeshTimeSettings::TimeUnit>( mProviderTimeUnitComboBox->currentIndex() ) );
   enableGroups( settings.useAbsoluteTime() ) ;
   mLayer->setTimeSettings( settings );
 }
@@ -96,4 +115,9 @@ void QgsMeshTimeFormatDialog::enableGroups( bool useAbsoluteTime )
   mRelativeTimeGroupBox->setEnabled( ! useAbsoluteTime );
 }
 
+bool QgsMeshTimeFormatDialog::layerHasReferenceTime() const
+{
+  return QgsMeshLayerUtils::firstReferenceTime( mLayer ).isValid();
+}
+
 QgsMeshTimeFormatDialog::~QgsMeshTimeFormatDialog() = default;

src/app/mesh/qgsmeshtimeformatdialog.h

@@ -39,12 +39,14 @@ class APP_EXPORT QgsMeshTimeFormatDialog: public QDialog, private Ui::QgsMeshTim
     ~QgsMeshTimeFormatDialog();
 
   private slots:
-
+    void loadProviderReferenceTime();
   private:
     void loadSettings();
     void saveSettings();
     void enableGroups( bool useAbsoluteTime );
 
+    bool layerHasReferenceTime() const;
+
     QgsMeshLayer *mLayer;
 };
 

src/core/mesh/qgsmeshdataprovider.cpp

@@ -133,6 +133,7 @@ QgsMeshDatasetGroupMetadata::QgsMeshDatasetGroupMetadata( const QString &name,
     double minimum,
     double maximum,
     int maximumVerticalLevels,
+    const QDateTime &referenceTime,
     const QMap<QString, QString> &extraOptions )
   : mName( name )
   , mIsScalar( isScalar )
@@ -141,6 +142,7 @@ QgsMeshDatasetGroupMetadata::QgsMeshDatasetGroupMetadata( const QString &name,
   , mMaximumValue( maximum )
   , mExtraOptions( extraOptions )
   , mMaximumVerticalLevelsCount( maximumVerticalLevels )
+  , mReferenceTime( referenceTime )
 {
 }
 
@@ -184,6 +186,11 @@ int QgsMeshDatasetGroupMetadata::maximumVerticalLevelsCount() const
   return mMaximumVerticalLevelsCount;
 }
 
+QDateTime QgsMeshDatasetGroupMetadata::referenceTime() const
+{
+  return mReferenceTime;
+}
+
 int QgsMeshDatasetSourceInterface::datasetCount( QgsMeshDatasetIndex index ) const
 {
   return datasetCount( index.group() );

src/core/mesh/qgsmeshdataprovider.h

@@ -388,6 +388,7 @@ class CORE_EXPORT QgsMeshDatasetGroupMetadata
      * \param minimum minimum value (magnitude for vectors) present among all group's dataset values
      * \param maximum maximum value (magnitude for vectors) present among all group's dataset values
      * \param maximumVerticalLevels maximum number of vertical levels for 3d stacked meshes, 0 for 2d meshes
+     * \param referenceTime reference time of the dataset group
      * \param extraOptions dataset's extra options stored by the provider. Usually contains the name, time value, time units, data file vendor, ...
      */
     QgsMeshDatasetGroupMetadata( const QString &name,
@@ -396,6 +397,7 @@ class CORE_EXPORT QgsMeshDatasetGroupMetadata
                                  double minimum,
                                  double maximum,
                                  int maximumVerticalLevels,
+                                 const QDateTime &referenceTime,
                                  const QMap<QString, QString> &extraOptions );
 
     /**
@@ -442,6 +444,13 @@ class CORE_EXPORT QgsMeshDatasetGroupMetadata
      */
     int maximumVerticalLevelsCount() const;
 
+    /**
+     * Returns the reference time
+     *
+     * \since QGIS 3.12
+     */
+    QDateTime referenceTime() const;
+
   private:
     QString mName;
     bool mIsScalar = false;
@@ -450,6 +459,7 @@ class CORE_EXPORT QgsMeshDatasetGroupMetadata
     double mMaximumValue = std::numeric_limits<double>::quiet_NaN();
     QMap<QString, QString> mExtraOptions;
     int mMaximumVerticalLevelsCount = 0; // for 3d stacked meshes
+    QDateTime mReferenceTime;
 };
 
 /**

src/core/mesh/qgsmeshlayer.cpp

@@ -531,6 +531,13 @@ bool QgsMeshLayer::setDataProvider( QString const &provider, const QgsDataProvid
     mDataSource = mDataSource + QStringLiteral( "&uid=%1" ).arg( QUuid::createUuid().toString() );
   }
 
+  QDateTime referenceTime = QgsMeshLayerUtils::firstReferenceTime( this );
+  if ( referenceTime.isValid() )
+  {
+    mTimeSettings.setAbsoluteTimeReferenceTime( referenceTime );
+    mTimeSettings.setUseAbsoluteTime( true );
+  }
+
   for ( int i = 0; i < mDataProvider->datasetGroupCount(); ++i )
     assignDefaultStyleToDatasetGroup( i );
 

src/core/mesh/qgsmeshlayerutils.cpp

@@ -260,6 +260,22 @@ QgsRectangle QgsMeshLayerUtils::triangleBoundingBox( const QgsPointXY &p1, const
 QString QgsMeshLayerUtils::formatTime( double hours, const QgsMeshTimeSettings &settings )
 {
   QString ret;
+
+  switch ( settings.providerTimeUnit() )
+  {
+    case QgsMeshTimeSettings::seconds:
+      hours = hours / 3600.0;
+      break;
+    case QgsMeshTimeSettings::minutes:
+      hours = hours / 60.0;
+      break;
+    case QgsMeshTimeSettings::hours:
+      break;
+    case QgsMeshTimeSettings::days:
+      hours = hours * 24.0;
+      break;
+  }
+
   if ( settings.useAbsoluteTime() )
   {
     QString format( settings.absoluteTimeFormat() );
@@ -346,4 +362,25 @@ QString QgsMeshLayerUtils::formatTime( double hours, const QgsMeshTimeSettings &
   return ret;
 }
 
+QDateTime QgsMeshLayerUtils::firstReferenceTime( QgsMeshLayer *meshLayer )
+{
+  if ( !meshLayer )
+    return QDateTime();
+
+  QgsMeshDataProvider *provider = meshLayer->dataProvider();
+
+  if ( !provider )
+    return QDateTime();
+
+  // Searches for the first valid reference time in the dataset groups
+  for ( int i = 0; i < provider->datasetGroupCount(); ++i )
+  {
+    QgsMeshDatasetGroupMetadata meta = provider->datasetGroupMetadata( i );
+    if ( meta.referenceTime().isValid() )
+      return meta.referenceTime();
+  }
+
+  return QDateTime();
+}
+
 ///@endcond

src/core/mesh/qgsmeshlayerutils.h

@@ -178,6 +178,15 @@ class CORE_EXPORT QgsMeshLayerUtils
      * Formats hours in human readable string based on settings
      */
     static QString formatTime( double hours, const QgsMeshTimeSettings &settings );
+
+    /**
+      * Searches and returns the first valid reference time in layer's dataset group
+      * \param meshLayer mesh layer to parse
+      *
+      * \since QGIS 3.12
+      */
+    static QDateTime firstReferenceTime( QgsMeshLayer *meshLayer );
+
 };
 
 ///@endcond

src/core/mesh/qgsmeshtimesettings.cpp

@@ -40,6 +40,7 @@ QDomElement QgsMeshTimeSettings::writeXml( QDomDocument &doc, const QgsReadWrite
   elem.setAttribute( QStringLiteral( "relative-time-format" ), mRelativeTimeFormat );
   elem.setAttribute( QStringLiteral( "absolute-time-reference-time" ), mAbsoluteTimeReferenceTime.toString() );
   elem.setAttribute( QStringLiteral( "absolute-time-format" ), mAbsoluteTimeFormat );
+  elem.setAttribute( QStringLiteral( "provider-time-unit" ), mProviderTimeUnit );
   return elem;
 }
 
@@ -51,6 +52,7 @@ void QgsMeshTimeSettings::readXml( const QDomElement &elem, const QgsReadWriteCo
   mRelativeTimeFormat = elem.attribute( QStringLiteral( "relative-time-format" ) );
   mAbsoluteTimeReferenceTime = QDateTime::fromString( elem.attribute( QStringLiteral( "absolute-time-reference-time" ) ) );
   mAbsoluteTimeFormat = elem.attribute( QStringLiteral( "absolute-time-format" ) );
+  mProviderTimeUnit = static_cast<QgsMeshTimeSettings::TimeUnit>( elem.attribute( QStringLiteral( "provider-time-unit" ) ).toInt() );
 }
 
 bool QgsMeshTimeSettings::useAbsoluteTime() const
@@ -113,3 +115,13 @@ void QgsMeshTimeSettings::setAbsoluteTimeFormat( const QString &absoluteTimeForm
 {
   mAbsoluteTimeFormat = absoluteTimeFormat;
 }
+
+QgsMeshTimeSettings::TimeUnit QgsMeshTimeSettings::providerTimeUnit() const
+{
+  return mProviderTimeUnit;
+}
+
+void QgsMeshTimeSettings::setProviderTimeUnit( const QgsMeshTimeSettings::TimeUnit &providerTimeUnit )
+{
+  mProviderTimeUnit = providerTimeUnit;
+}

src/core/mesh/qgsmeshtimesettings.h

@@ -35,7 +35,23 @@
 class CORE_EXPORT QgsMeshTimeSettings
 {
   public:
-    //! Default constructor for relative time format and 0 offset
+
+    /**
+     *  Time units used to display time
+     *  \since QGIS 3.12
+    */
+    enum TimeUnit
+    {
+      //! second unit
+      seconds = 0,
+      //! minute unit
+      minutes,
+      //! hour unit
+      hours,
+      //! day unit
+      days
+    };
+
     QgsMeshTimeSettings();
     //! Constructs relative time format settings with defined offset in hours
     QgsMeshTimeSettings( double relativeTimeOffsetHours, const QString &relativeTimeFormat );
@@ -84,6 +100,18 @@ class CORE_EXPORT QgsMeshTimeSettings
     //! Sets format used for absolute time
     void setAbsoluteTimeFormat( const QString &absoluteTimeFormat );
 
+    /**
+     * Returns the provider time unit
+     * \since QGIS 3.12
+     */
+    TimeUnit providerTimeUnit() const;
+
+    /**
+    * Sets the provider time unit
+    * \since QGIS 3.12
+    */
+    void setProviderTimeUnit( const TimeUnit &providerTimeUnit );
+
   private:
     bool mUseAbsoluteTime = false;
 
@@ -93,6 +121,8 @@ class CORE_EXPORT QgsMeshTimeSettings
 
     QDateTime mAbsoluteTimeReferenceTime;
     QString mAbsoluteTimeFormat = QStringLiteral( "dd.MM.yyyy hh:mm:ss" );
+
+    TimeUnit mProviderTimeUnit = TimeUnit::hours;
 };
 
 Q_DECLARE_METATYPE( QgsMeshTimeSettings );

src/core/providers/meshmemory/qgsmeshmemorydataprovider.cpp

@@ -387,6 +387,7 @@ QgsMeshDatasetGroupMetadata QgsMeshMemoryDatasetGroup::groupMetadata() const
            minimum,
            maximum,
            0,
+           QDateTime(),
            metadata
          );
 }

src/providers/mdal/qgsmdalprovider.cpp

@@ -493,6 +493,9 @@ QgsMeshDatasetGroupMetadata QgsMdalProvider::datasetGroupMetadata( int groupInde
     metadata[key] = value;
   }
 
+  QString referenceTimeString( MDAL_G_referenceTime( group ) );
+  QDateTime referenceTime = QDateTime::fromString( referenceTimeString, Qt::ISODate );
+
   QgsMeshDatasetGroupMetadata meta(
     name,
     isScalar,
@@ -500,6 +503,7 @@ QgsMeshDatasetGroupMetadata QgsMdalProvider::datasetGroupMetadata( int groupInde
     min,
     max,
     maximumVerticalLevels,
+    referenceTime,
     metadata
   );
 

src/ui/mesh/qgsmeshrenderervectorsettingswidgetbase.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>365</width>
-    <height>749</height>
+    <width>340</width>
+    <height>773</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -409,6 +409,9 @@
       <string>Traces</string>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout_6">
+      <property name="sizeConstraint">
+       <enum>QLayout::SetDefaultConstraint</enum>
+      </property>
       <item>
        <layout class="QHBoxLayout" name="horizontalLayout_6">
         <property name="topMargin">
@@ -450,6 +453,24 @@
         </item>
         <item>
          <widget class="QDoubleSpinBox" name="mTracesMaxLengthSpinBox">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Ignored" vsizetype="Fixed">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+          <property name="minimumSize">
+           <size>
+            <width>0</width>
+            <height>0</height>
+           </size>
+          </property>
+          <property name="maximumSize">
+           <size>
+            <width>16777215</width>
+            <height>16777215</height>
+           </size>
+          </property>
           <property name="minimum">
            <double>1.000000000000000</double>
           </property>

src/ui/mesh/qgsmeshtimeformatdialog.ui

@@ -13,6 +13,9 @@
   <property name="windowTitle">
    <string>Time Display Options</string>
   </property>
+  <property name="toolTip">
+   <string>Reload from layer</string>
+  </property>
   <layout class="QVBoxLayout" name="verticalLayout_4">
    <item>
     <widget class="QComboBox" name="mUseTimeComboBox">
@@ -57,21 +60,48 @@
        </widget>
       </item>
       <item>
-       <widget class="QDateTimeEdit" name="mReferenceDateTimeEdit">
-        <property name="dateTime">
-         <datetime>
-          <hour>0</hour>
-          <minute>0</minute>
-          <second>0</second>
-          <year>2019</year>
-          <month>1</month>
-          <day>1</day>
-         </datetime>
+       <layout class="QHBoxLayout" name="horizontalLayout_3">
+        <property name="topMargin">
+         <number>0</number>
         </property>
-        <property name="calendarPopup">
-         <bool>true</bool>
-        </property>
-       </widget>
+        <item>
+         <widget class="QDateTimeEdit" name="mReferenceDateTimeEdit">
+          <property name="dateTime">
+           <datetime>
+            <hour>0</hour>
+            <minute>0</minute>
+            <second>0</second>
+            <year>2019</year>
+            <month>1</month>
+            <day>1</day>
+           </datetime>
+          </property>
+          <property name="calendarPopup">
+           <bool>true</bool>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QPushButton" name="mReloadReferenceTimeButton">
+          <property name="maximumSize">
+           <size>
+            <width>24</width>
+            <height>24</height>
+           </size>
+          </property>
+          <property name="focusPolicy">
+           <enum>Qt::NoFocus</enum>
+          </property>
+          <property name="text">
+           <string/>
+          </property>
+          <property name="icon">
+           <iconset resource="../../../images/images.qrc">
+            <normaloff>:/images/themes/default/mActionRefresh.svg</normaloff>:/images/themes/default/mActionRefresh.svg</iconset>
+          </property>
+         </widget>
+        </item>
+       </layout>
       </item>
       <item>
        <widget class="QLabel" name="label">
@@ -284,9 +314,51 @@
      </layout>
     </widget>
    </item>
+   <item>
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>Provider time settings</string>
+     </property>
+     <layout class="QFormLayout" name="formLayout">
+      <item row="0" column="1">
+       <widget class="QComboBox" name="mProviderTimeUnitComboBox">
+        <item>
+         <property name="text">
+          <string>seconds</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>minutes</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>hours</string>
+         </property>
+        </item>
+        <item>
+         <property name="text">
+          <string>days</string>
+         </property>
+        </item>
+       </widget>
+      </item>
+      <item row="0" column="0">
+       <widget class="QLabel" name="label_5">
+        <property name="text">
+         <string>Time unit</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
   </layout>
  </widget>
- <resources/>
+ <resources>
+  <include location="../../../images/images.qrc"/>
+ </resources>
  <connections/>
  <slots>
   <slot>shaftLengthMethodChanged()</slot>