[FEATURE][composer] Add checkbox for showing unique records only in composer

attribute tables. (Sponsored by my OCD)

python/core/composer/qgscomposerattributetablev2.sip

@@ -146,7 +146,21 @@ class QgsComposerAttributeTableV2 : QgsComposerTableV2
      * @see setMaximumNumberOfFeatures
      */
     int maximumNumberOfFeatures() const;
+    
+    /**Sets attribute table to only show unique rows.
+     * @param uniqueOnly set to true to show only unique rows. Duplicate rows
+     * will be stripped from the table.
+     * @see uniqueRowsOnly
+     */
+    void setUniqueRowsOnly( const bool uniqueOnly );
 
+    /**Returns true if the table is set to show only unique rows.
+     * @returns true if table only shows unique rows and is stripping out
+     * duplicate rows.
+     * @see setUniqueRowsOnly
+     */
+    bool uniqueRowsOnly() const;
+    
     /**Sets attribute table to only show features which are visible in a composer map item. Changing
      * this setting forces the table to refetch features from its vector layer, and may result in
      * the table changing size to accommodate the new displayed feature attributes.

python/core/composer/qgscomposertablev2.sip

@@ -358,4 +358,11 @@ class QgsComposerTableV2: QgsComposerMultiFrame
      */
     void recalculateTableSize();
     
+    /**Checks whether a table contents contains a given row
+     * @param contents table contents to check
+     * @param row row to check for
+     * @returns true if contents contains rows
+     */
+    bool contentsContainsRow( const QgsComposerTableContents &contents, const QgsComposerTableRow &row ) const;
+    
 };

src/app/composer/qgsattributeselectiondialog.cpp

@@ -383,15 +383,21 @@ void QgsAttributeSelectionDialog::on_mRemoveColumnPushButton_clicked()
   {
     //remove selected row from model
     QItemSelection viewSelection( mColumnsTableView->selectionModel()->selection() );
-    int selectedRow = viewSelection.indexes().at( 0 ).row();
-    mColumnModel->removeRow( selectedRow );
+    if ( viewSelection.length() > 0 )
+    {
+      int selectedRow = viewSelection.indexes().at( 0 ).row();
+      mColumnModel->removeRow( selectedRow );
+    }
   }
   if ( mComposerTableV1 )
   {
     //remove selected row from model
     QItemSelection viewSelection( mColumnsTableView->selectionModel()->selection() );
-    int selectedRow = viewSelection.indexes().at( 0 ).row();
-    mColumnModelV1->removeRow( selectedRow );
+    if ( viewSelection.length() > 0 )
+    {
+      int selectedRow = viewSelection.indexes().at( 0 ).row();
+      mColumnModelV1->removeRow( selectedRow );
+    }
   }
 
 }
@@ -416,15 +422,21 @@ void QgsAttributeSelectionDialog::on_mColumnUpPushButton_clicked()
   {
     //move selected row up
     QItemSelection viewSelection( mColumnsTableView->selectionModel()->selection() );
-    int selectedRow = viewSelection.indexes().at( 0 ).row();
-    mColumnModel->moveRow( selectedRow, QgsComposerAttributeTableColumnModelV2::ShiftUp );
+    if ( viewSelection.size() > 0 )
+    {
+      int selectedRow = viewSelection.indexes().at( 0 ).row();
+      mColumnModel->moveRow( selectedRow, QgsComposerAttributeTableColumnModelV2::ShiftUp );
+    }
   }
   else if ( mComposerTableV1 )
   {
     //move selected row up
     QItemSelection viewSelection( mColumnsTableView->selectionModel()->selection() );
-    int selectedRow = viewSelection.indexes().at( 0 ).row();
-    mColumnModelV1->moveRow( selectedRow, QgsComposerAttributeTableColumnModel::ShiftUp );
+    if ( viewSelection.size() > 0 )
+    {
+      int selectedRow = viewSelection.indexes().at( 0 ).row();
+      mColumnModelV1->moveRow( selectedRow, QgsComposerAttributeTableColumnModel::ShiftUp );
+    }
   }
 }
 
@@ -434,15 +446,21 @@ void QgsAttributeSelectionDialog::on_mColumnDownPushButton_clicked()
   {
     //move selected row down
     QItemSelection viewSelection( mColumnsTableView->selectionModel()->selection() );
-    int selectedRow = viewSelection.indexes().at( 0 ).row();
-    mColumnModel->moveRow( selectedRow, QgsComposerAttributeTableColumnModelV2::ShiftDown );
+    if ( viewSelection.size() > 0 )
+    {
+      int selectedRow = viewSelection.indexes().at( 0 ).row();
+      mColumnModel->moveRow( selectedRow, QgsComposerAttributeTableColumnModelV2::ShiftDown );
+    }
   }
   else if ( mComposerTableV1 )
   {
     //move selected row down
     QItemSelection viewSelection( mColumnsTableView->selectionModel()->selection() );
-    int selectedRow = viewSelection.indexes().at( 0 ).row();
-    mColumnModelV1->moveRow( selectedRow, QgsComposerAttributeTableColumnModel::ShiftDown );
+    if ( viewSelection.size() > 0 )
+    {
+      int selectedRow = viewSelection.indexes().at( 0 ).row();
+      mColumnModelV1->moveRow( selectedRow, QgsComposerAttributeTableColumnModel::ShiftDown );
+    }
   }
 
 }
@@ -498,8 +516,11 @@ void QgsAttributeSelectionDialog::on_mAddSortColumnPushButton_clicked()
 void QgsAttributeSelectionDialog::on_mRemoveSortColumnPushButton_clicked()
 {
   //remove selected rows from sort order widget
-
   QItemSelection sortSelection( mSortColumnTableView->selectionModel()->selection() );
+  if ( sortSelection.length() < 1 )
+  {
+    return;
+  }
   QModelIndex selectedIndex = sortSelection.indexes().at( 0 );
   int rowToRemove = selectedIndex.row();
 
@@ -536,6 +557,10 @@ void QgsAttributeSelectionDialog::on_mSortColumnUpPushButton_clicked()
 {
   //find selected row
   QItemSelection sortSelection( mSortColumnTableView->selectionModel()->selection() );
+  if ( sortSelection.length() < 1 )
+  {
+    return;
+  }
   QModelIndex selectedIndex = sortSelection.indexes().at( 0 );
 
   if ( mComposerTable )
@@ -562,10 +587,13 @@ void QgsAttributeSelectionDialog::on_mSortColumnUpPushButton_clicked()
 
 void QgsAttributeSelectionDialog::on_mSortColumnDownPushButton_clicked()
 {
-
-
   //find selected row
   QItemSelection sortSelection( mSortColumnTableView->selectionModel()->selection() );
+  if ( sortSelection.length() < 1 )
+  {
+    return;
+  }
+
   QModelIndex selectedIndex = sortSelection.indexes().at( 0 );
 
   if ( mComposerTable )

src/app/composer/qgscomposerattributetablewidget.cpp

@@ -491,6 +491,7 @@ void QgsComposerAttributeTableWidget::updateGuiElements()
     mComposerMapLabel->setEnabled( false );
   }
 
+  mUniqueOnlyCheckBox->setChecked( mComposerTable->uniqueRowsOnly() );
   mIntersectAtlasCheckBox->setChecked( mComposerTable->filterToAtlasFeature() );
   mFeatureFilterEdit->setText( mComposerTable->featureFilter() );
   mFeatureFilterCheckBox->setCheckState( mComposerTable->filterFeatures() ? Qt::Checked : Qt::Unchecked );
@@ -595,6 +596,7 @@ void QgsComposerAttributeTableWidget::blockAllSignals( bool b )
   mGridStrokeWidthSpinBox->blockSignals( b );
   mShowGridGroupCheckBox->blockSignals( b );
   mShowOnlyVisibleFeaturesCheckBox->blockSignals( b );
+  mUniqueOnlyCheckBox->blockSignals( b );
   mIntersectAtlasCheckBox->blockSignals( b );
   mFeatureFilterEdit->blockSignals( b );
   mFeatureFilterCheckBox->blockSignals( b );
@@ -640,6 +642,26 @@ void QgsComposerAttributeTableWidget::on_mShowOnlyVisibleFeaturesCheckBox_stateC
   mComposerMapLabel->setEnabled( state == Qt::Checked );
 }
 
+void QgsComposerAttributeTableWidget::on_mUniqueOnlyCheckBox_stateChanged( int state )
+{
+  if ( !mComposerTable )
+  {
+    return;
+  }
+
+  QgsComposition* composition = mComposerTable->composition();
+  if ( composition )
+  {
+    composition->beginMultiFrameCommand( mComposerTable, tr( "Table remove duplicates changed" ) );
+  }
+  mComposerTable->setUniqueRowsOnly( state == Qt::Checked );
+  mComposerTable->update();
+  if ( composition )
+  {
+    composition->endMultiFrameCommand();
+  }
+}
+
 void QgsComposerAttributeTableWidget::on_mIntersectAtlasCheckBox_stateChanged( int state )
 {
   if ( !mComposerTable )

src/app/composer/qgscomposerattributetablewidget.h

@@ -73,6 +73,7 @@ class QgsComposerAttributeTableWidget: public QgsComposerItemBaseWidget, private
     void on_mEmptyModeComboBox_currentIndexChanged( int index );
     void on_mEmptyMessageLineEdit_editingFinished();
     void on_mIntersectAtlasCheckBox_stateChanged( int state );
+    void on_mUniqueOnlyCheckBox_stateChanged( int state );
 
     /**Inserts a new maximum number of features into the spin box (without the spinbox emitting a signal)*/
     void setMaximumNumberOfFeatures( int n );

src/core/composer/qgscomposerattributetablev2.cpp

@@ -104,6 +104,7 @@ QgsComposerAttributeTableV2::QgsComposerAttributeTableV2( QgsComposition* compos
     , mCurrentAtlasLayer( 0 )
     , mComposerMap( 0 )
     , mMaximumNumberOfFeatures( 5 )
+    , mShowUniqueRowsOnly( false )
     , mShowOnlyVisibleFeatures( false )
     , mFilterToAtlasIntersection( false )
     , mFilterFeatures( false )
@@ -293,6 +294,18 @@ void QgsComposerAttributeTableV2::setMaximumNumberOfFeatures( const int features
   emit changed();
 }
 
+void QgsComposerAttributeTableV2::setUniqueRowsOnly( const bool uniqueOnly )
+{
+  if ( uniqueOnly == mShowUniqueRowsOnly )
+  {
+    return;
+  }
+
+  mShowUniqueRowsOnly = uniqueOnly;
+  refreshAttributes();
+  emit changed();
+}
+
 void QgsComposerAttributeTableV2::setDisplayOnlyVisibleFeatures( const bool visibleOnly )
 {
   if ( visibleOnly == mShowOnlyVisibleFeatures )
@@ -555,8 +568,12 @@ bool QgsComposerAttributeTableV2::getTableContents( QgsComposerTableContents &co
         currentRow << value;
       }
     }
-    contents << currentRow;
-    ++counter;
+
+    if ( !mShowUniqueRowsOnly || !contentsContainsRow( contents, currentRow ) )
+    {
+      contents << currentRow;
+      ++counter;
+    }
   }
 
   //sort the list, starting with the last attribute
@@ -644,6 +661,7 @@ bool QgsComposerAttributeTableV2::writeXML( QDomElement& elem, QDomDocument & do
   QDomElement composerTableElem = doc.createElement( "ComposerAttributeTableV2" );
   composerTableElem.setAttribute( "source", QString::number(( int )mSource ) );
   composerTableElem.setAttribute( "relationId", mRelationId );
+  composerTableElem.setAttribute( "showUniqueRowsOnly", mShowUniqueRowsOnly );
   composerTableElem.setAttribute( "showOnlyVisibleFeatures", mShowOnlyVisibleFeatures );
   composerTableElem.setAttribute( "filterToAtlasIntersection", mFilterToAtlasIntersection );
   composerTableElem.setAttribute( "maxFeatures", mMaximumNumberOfFeatures );
@@ -698,6 +716,7 @@ bool QgsComposerAttributeTableV2::readXML( const QDomElement& itemElem, const QD
     mCurrentAtlasLayer = mComposition->atlasComposition().coverageLayer();
   }
 
+  mShowUniqueRowsOnly = itemElem.attribute( "showUniqueRowsOnly", "0" ).toInt();
   mShowOnlyVisibleFeatures = itemElem.attribute( "showOnlyVisibleFeatures", "1" ).toInt();
   mFilterToAtlasIntersection = itemElem.attribute( "filterToAtlasIntersection", "0" ).toInt();
   mFilterFeatures = itemElem.attribute( "filterFeatures", "false" ) == "true" ? true : false;

src/core/composer/qgscomposerattributetablev2.h

@@ -170,6 +170,20 @@ class CORE_EXPORT QgsComposerAttributeTableV2: public QgsComposerTableV2
      */
     int maximumNumberOfFeatures() const { return mMaximumNumberOfFeatures; }
 
+    /**Sets attribute table to only show unique rows.
+     * @param uniqueOnly set to true to show only unique rows. Duplicate rows
+     * will be stripped from the table.
+     * @see uniqueRowsOnly
+     */
+    void setUniqueRowsOnly( const bool uniqueOnly );
+
+    /**Returns true if the table is set to show only unique rows.
+     * @returns true if table only shows unique rows and is stripping out
+     * duplicate rows.
+     * @see setUniqueRowsOnly
+     */
+    bool uniqueRowsOnly() const { return mShowUniqueRowsOnly; }
+
     /**Sets attribute table to only show features which are visible in a composer map item. Changing
      * this setting forces the table to refetch features from its vector layer, and may result in
      * the table changing size to accommodate the new displayed feature attributes.
@@ -278,6 +292,9 @@ class CORE_EXPORT QgsComposerAttributeTableV2: public QgsComposerTableV2
     /**Maximum number of features that is displayed*/
     int mMaximumNumberOfFeatures;
 
+    /**True if only unique rows should be shown*/
+    bool mShowUniqueRowsOnly;
+
     /**Shows only the features that are visible in the associated composer map (true by default)*/
     bool mShowOnlyVisibleFeatures;
 

src/core/composer/qgscomposertablev2.cpp

@@ -801,3 +801,15 @@ void QgsComposerTableV2::recalculateTableSize()
   //fixed and minimum frame sizes
   recalculateFrameRects();
 }
+
+bool QgsComposerTableV2::contentsContainsRow( const QgsComposerTableContents &contents, const QgsComposerTableRow &row ) const
+{
+  if ( contents.indexOf( row ) >= 0 )
+  {
+    return true;
+  }
+  else
+  {
+    return false;
+  }
+}

src/core/composer/qgscomposertablev2.h

@@ -428,6 +428,15 @@ class CORE_EXPORT QgsComposerTableV2: public QgsComposerMultiFrame
     /**Recalculates and updates the size of the table and all table frames.
      */
     void recalculateTableSize();
+
+    /**Checks whether a table contents contains a given row
+     * @param contents table contents to check
+     * @param row row to check for
+     * @returns true if contents contains rows
+     */
+    bool contentsContainsRow( const QgsComposerTableContents &contents, const QgsComposerTableRow &row ) const;
+
+    friend class TestQgsComposerTableV2;
 };
 
 #endif // QGSCOMPOSERTABLEV2_H

src/ui/qgscomposerattributetablewidgetbase.ui

@@ -47,7 +47,7 @@
         <x>0</x>
         <y>0</y>
         <width>392</width>
-        <height>1048</height>
+        <height>1076</height>
        </rect>
       </property>
       <layout class="QVBoxLayout" name="mainLayout">
@@ -158,14 +158,14 @@
             </property>
            </widget>
           </item>
-          <item row="1" column="0" colspan="2">
+          <item row="2" column="0" colspan="2">
            <widget class="QCheckBox" name="mShowOnlyVisibleFeaturesCheckBox">
             <property name="text">
              <string>Show only features visible within a map</string>
             </property>
            </widget>
           </item>
-          <item row="2" column="0">
+          <item row="3" column="0">
            <widget class="QLabel" name="mComposerMapLabel">
             <property name="text">
              <string>Composer map</string>
@@ -178,17 +178,17 @@
             </property>
            </widget>
           </item>
-          <item row="2" column="1">
+          <item row="3" column="1">
            <widget class="QComboBox" name="mComposerMapComboBox"/>
           </item>
-          <item row="4" column="0">
+          <item row="5" column="0">
            <widget class="QCheckBox" name="mFeatureFilterCheckBox">
             <property name="text">
              <string>Filter with</string>
             </property>
            </widget>
           </item>
-          <item row="4" column="1">
+          <item row="5" column="1">
            <layout class="QHBoxLayout" name="horizontalLayout">
             <item>
              <widget class="QLineEdit" name="mFeatureFilterEdit"/>
@@ -206,13 +206,20 @@
             </item>
            </layout>
           </item>
-          <item row="3" column="0" colspan="2">
+          <item row="4" column="0" colspan="2">
            <widget class="QCheckBox" name="mIntersectAtlasCheckBox">
             <property name="text">
              <string>Show only features intersecting atlas feature</string>
             </property>
            </widget>
           </item>
+          <item row="1" column="0" colspan="2">
+           <widget class="QCheckBox" name="mUniqueOnlyCheckBox">
+            <property name="text">
+             <string>Remove duplicate rows from table</string>
+            </property>
+           </widget>
+          </item>
          </layout>
          <zorder>mShowOnlyVisibleFeaturesCheckBox</zorder>
          <zorder>mComposerMapLabel</zorder>
@@ -221,6 +228,7 @@
          <zorder>mMaximumRowsSpinBox</zorder>
          <zorder>mMaxNumFeaturesLabel</zorder>
          <zorder>mIntersectAtlasCheckBox</zorder>
+         <zorder>mUniqueOnlyCheckBox</zorder>
         </widget>
        </item>
        <item>

tests/src/core/testqgscomposertablev2.cpp

@@ -55,6 +55,8 @@ class TestQgsComposerTableV2: public QObject
     void attributeTableRepeat();
     void attributeTableAtlasSource(); //test attribute table in atlas feature mode
     void attributeTableRelationSource(); //test attribute table in relation mode
+    void contentsContainsRow(); //test the contentsContainsRow function
+    void removeDuplicates(); //test removing duplicate rows
 
   private:
     QgsComposition* mComposition;
@@ -535,6 +537,74 @@ void TestQgsComposerTableV2::attributeTableRelationSource()
   delete table;
 }
 
+void TestQgsComposerTableV2::contentsContainsRow()
+{
+  QgsComposerTableContents testContents;
+  QgsComposerTableRow row1;
+  row1 << QVariant( QString( "string 1" ) ) << QVariant( 2 ) << QVariant( 1.5 ) << QVariant( QString( "string 2" ) );
+  QgsComposerTableRow row2;
+  row2 << QVariant( QString( "string 2" ) ) << QVariant( 2 ) << QVariant( 1.5 ) << QVariant( QString( "string 2" ) );
+  //same as row1
+  QgsComposerTableRow row3;
+  row3 << QVariant( QString( "string 1" ) ) << QVariant( 2 ) << QVariant( 1.5 ) << QVariant( QString( "string 2" ) );
+  QgsComposerTableRow row4;
+  row4 << QVariant( QString( "string 1" ) ) << QVariant( 2 ) << QVariant( 1.7 ) << QVariant( QString( "string 2" ) );
+
+  testContents << row1;
+  testContents << row2;
+
+  QVERIFY( mComposerAttributeTable->contentsContainsRow( testContents, row1 ) );
+  QVERIFY( mComposerAttributeTable->contentsContainsRow( testContents, row2 ) );
+  QVERIFY( mComposerAttributeTable->contentsContainsRow( testContents, row3 ) );
+  QVERIFY( !mComposerAttributeTable->contentsContainsRow( testContents, row4 ) );
+}
+
+void TestQgsComposerTableV2::removeDuplicates()
+{
+  QgsVectorLayer* dupesLayer = new QgsVectorLayer( "Point?field=col1:integer&field=col2:integer&field=col3:integer", "dupes", "memory" );
+  QVERIFY( dupesLayer->isValid() );
+  QgsFeature f1( dupesLayer->dataProvider()->fields(), 1 );
+  f1.setAttribute( "col1", 1 );
+  f1.setAttribute( "col2", 1 );
+  f1.setAttribute( "col3", 1 );
+  QgsFeature f2( dupesLayer->dataProvider()->fields(), 2 );
+  f2.setAttribute( "col1", 1 );
+  f2.setAttribute( "col2", 2 );
+  f2.setAttribute( "col3", 2 );
+  QgsFeature f3( dupesLayer->dataProvider()->fields(), 3 );
+  f3.setAttribute( "col1", 1 );
+  f3.setAttribute( "col2", 2 );
+  f3.setAttribute( "col3", 3 );
+  QgsFeature f4( dupesLayer->dataProvider()->fields(), 4 );
+  f4.setAttribute( "col1", 1 );
+  f4.setAttribute( "col2", 1 );
+  f4.setAttribute( "col3", 1 );
+  dupesLayer->dataProvider()->addFeatures( QgsFeatureList() << f1 << f2 << f3 << f4 );
+
+  QgsComposerAttributeTableV2* table = new QgsComposerAttributeTableV2( mComposition, false );
+  table->setSource( QgsComposerAttributeTableV2::LayerAttributes );
+  table->setVectorLayer( dupesLayer );
+  table->setMaximumNumberOfFeatures( 50 );
+  QCOMPARE( table->contents()->length(), 4 );
+
+  table->setUniqueRowsOnly( true );
+  QCOMPARE( table->contents()->length(), 3 );
+
+  //check if removing attributes in unique mode works correctly (should result in duplicate rows,
+  //which will be stripped out)
+  table->columns()->removeLast();
+  table->refreshAttributes();
+  QCOMPARE( table->contents()->length(), 2 );
+  table->columns()->removeLast();
+  table->refreshAttributes();
+  QCOMPARE( table->contents()->length(), 1 );
+  table->setUniqueRowsOnly( false );
+  QCOMPARE( table->contents()->length(), 4 );
+
+  mComposition->removeMultiFrame( table );
+  delete dupesLayer;
+}
+
 QTEST_MAIN( TestQgsComposerTableV2 )
 #include "moc_testqgscomposertablev2.cxx"